Journal articles: 'Inverter'

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Abdel-Aziz, Ali, Mohamed A. Elgenedy, and Barry Williams. "A Comparative Review of Three Different Power Inverters for DC–AC Applications." Energies 16, no. 21 (October 25, 2023): 7254. http://dx.doi.org/10.3390/en16217254.

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This paper presents a comparative review of three different widely used power inverters, namely the conventional six-switch inverter; the reduced switch count four-switch inverter; and the eight-switch inverter. The later inverter can be reconfigured as a neutral-point diode-clamped inverter at the failure of one inverter leg. The three power inverters are compared and discussed with respect to cost, complexity, losses, common mode voltage, and control techniques. The paper is intended to serve as a guide regarding selecting the appropriate inverter for each specific application. Simulation results are presented to demonstrate the performance of the three power inverters, followed by a comprehensive comparison between the three power inverters.

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Nayeemuddin, M., T. Bramhananda Reddy, and M. Vijaya Kumar. "Level Shifted Discontinuous PWM Algorithms to Minimize Common Mode Voltage for Cascaded Multilevel Inverter Fed Induction Motor Drive." International Journal of Power Electronics and Drive Systems (IJPEDS) 9, no. 2 (June 1, 2018): 504. http://dx.doi.org/10.11591/ijpeds.v9.i2.pp504-518.

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This paper presents combinations of level shifted pulse-width modulation algorithm with conventional discontinuous pulse-width modulation methods for cascaded multilevel inverters. In the proposed DPWM a zero sequence signal is injected in sinusoidal reference signal to generate various modulators with easier implementation. The analysis four various control strategies namely Common Carrier (CC), Inverted Carrier (IC), Phase Shifted (PS) and Inverted Phase Shift (IPS) for cascaded multilevel inverter fed induction motor drive has been illustrated. To validate the proposed work experimental tests has been carried out using dSPACE controller. Experimental study proves that using proposed algorithms reduction in common-mode voltage with fewer harmonics along with reduced switching loss for a cascaded multilevel inverter fed motor drive has been achieved.

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Chinmay V., Deshpande, Deshpande Chaitanya V., and Deokar Sanjay A. "Performance Evaluation of Dynamic Voltage Restorer Based on Transformer-based Z Source Inverter." International Journal of Power Electronics and Drive Systems (IJPEDS) 8, no. 3 (September 1, 2017): 1101. http://dx.doi.org/10.11591/ijpeds.v8.i3.pp1101-1108.

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In this paper, latest technology is introduced in substitution to conventional voltage and current type inverter with Transformer based impedance (Z) source inverter in voltage sag assessment and mitigation and compared with voltage source inverter based dynamic voltage restorer. Transformer based impedance source inverters (Trans-Z source inverters) are newly proposed inverters that can be used to overcome downside of voltage source inverter, current source inverter and impedance source (Z-source) inverter. T-Z source inverter consists of transformer with high frequency and low leakage inductance along with low reactive component compared with conventional Z source inverter. In case of T-Z source inverter, voltage stress throughout Z-source capacitor is reduced along with inrush current limitation at startup. This paper presents modeling of T-Z source inverter based dynamic voltage restorer using MATLAB/SIMULINK software along with its THD analysis which is compared with VSI based dynamic voltage restorer. Here abc to dq0 control algorithm is employed. The control technique which is employed for simulation shows excellent results for voltage sag and swell compensation.

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Iwаszkiewicz, Jаn, and Adam Muc. "The active filtering of the inverter output voltage by use of orthogonal vectors’ control strategy." Renewable Energy and Power Quality Journal 20 (September 2022): 817–21. http://dx.doi.org/10.24084/repqj20.446.

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he paper proposes a creative control method permitting to filter output voltage waveforms of the inverter. The main idea is based on the assumption that the total inverter output space vector is carefully chosen as a composition of two space vectors generated by 2 two-level inverters. The total built-up inverter is assembled of two standard three-phase inverters: a main inverter (MI) and an auxiliary one (AI) serving as an active filter. The output voltage space vector of the built-up inverter is composed of one or two space vectors generated by the respective inverters. The space vectors of the auxiliary inverter are orthogonal to the respective space vectors of the main inverter. The structure and its performance as well as the control method using specified vectors are discussed in the paper.

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Chemseddine, Aicha, Noureddine Benabadji, Ali Cheknane, and Salah Eddine Mankour. "A comparison of single phase standalone square waveform solar inverter topologies: half bridge and full bridge." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 4 (August 1, 2020): 3384. http://dx.doi.org/10.11591/ijece.v10i4.pp3384-3392.

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In stand-alone photovoltaic installations the photovoltaic inverter allows transforming the DC power produced by the photovoltaic modules into an AC power. Depending on the shape of the AC output voltage generated by the inverter there exist three main types of stand-alone PV inverters: pure sine waveform inverters, modulated sine waveform inverters and square waveform inverters and each type of these inverters is also divided into different topologies. In this paper we will be interested and study the square waveform stand-alone inverter topologies which are the half bridge and the full-bridge inverter topologies.

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Gireesh Kumar, Devineni, Nagineni Venkata Sireesha, D. S. Naga Malleswara Rao, Pandla Chinna Dastagiri Goud, Musheer Vaqur, and T. V. V. Pavan kumar. "Optimized Inverter Circuits for Driving Dual AC Loads for Home Solar Water Pumping." E3S Web of Conferences 430 (2023): 01005. http://dx.doi.org/10.1051/e3sconf/202343001005.

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This research presents a generic pulse width modulation (PWM) approach for nine switch inverters and five-leg inverters. The circuit design of both inverters and a modulation mechanism for separate drives have been described. The available DC bus voltage supplied the two induction motors using a PWM technique for a 5-leg inverter. Nine-switch inverters and nine-switch z-source inverters have lately been presented as dual-output inverter. A nine-switch z-source inverter and a unique pulse width modulation (PWM) were created. Also, a five-leg inverter is modelled using Extended Two Arm Modulation (ETAM) scheme. The suggested modulation techniques were applied to control two machine drive systems with a single inverter architecture with a reduced switch count for pumping the water to house hold appliances. The comparative analysis of the two dual-output inverters is integral to this work.

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Susheela, Nunsavath. "Comparative Analysis of Carrier based techniques for Single phase Diode Clamped MLI and Hybrid inverter with reduced components." Indonesian Journal of Electrical Engineering and Computer Science 7, no. 3 (September 1, 2017): 687. http://dx.doi.org/10.11591/ijeecs.v7.i3.pp687-697.

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<p>The multilevel inverters have highly desirable characteristics in high power high voltage applications. The multilevel inverter was started first with diode clamped multilevel inverter. Later, various configurations have been came into existence for many applications. However the multilevel inverters have some demerits such as requiring higher number of components, PWM control method is complex and capacitor voltage balancing problem. The hybrid multilevel inverter presented in this paper has superior characteristics over conventional multilevel inverters. The hybrid multilevel inverter employs fewer components and less carrier signals when compared to conventional multilevel inverters. It consists of level generation and polarity generation stages which involves high frequency and low frequency switches. The complexity and overall cost for higher output voltage levels are greatly reduced. Implementation of single phase 7-level, 9-level and 11-level diode clamped multilevel inverter and hybrid multilevel inverter has been performed using sinusoidal pulse width modulation (SPWM) strategies i.e., phase disposition (PD), alternate phase opposition disposition (APOD). Also these techniques are compared in terms of total harmonic distortion (THD) for various modulation indices and observed to be greatly improved in case of hybrid inverter when compared to diode clamped inverter. The comparative study of performance for single phase diode clamped multilevel inverter and hybrid inverter is analyzed with different loads. Simulation is performed using MATLAB/ SIMULINK. </p>

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Murdianto, Farid Dwi, Indhana Sudihato, Anang Budi Karso, and Wildana Zulfa. "Design of a Single Phase HERIC-SPWM." INTEK: Jurnal Penelitian 9, no. 1 (April 1, 2022): 7. http://dx.doi.org/10.31963/intek.v9i1.2995.

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Development in the field of technology has experienced rapid development in recent years, especially in inverter. Every year the development of inverters is very fast starting from full bidge inverters to HERIC inverters, inverters are usually used to convert DC voltage to AC, HERIC inverters are modifications of full bidge inverters with 2 additional IGBTs on the output side, therefore this paper will discuss about inverter design. HERIC SPWM 1 phase.The HERIC inverter will be compared with full bridge inverters to find out the advantages of these modifications. The modulation technique here uses SPWM (sinusoidal pulse width modulation) modulation technique as the switching process. IGBT switching on the HERIC inverter to produce the desired output waveform. The methodology for making a 1-phase HERIC SPWM inverter using a source from the PLN road network which will then be rectified by the rectifier. The rectifier output of 311 vdc will then be converted into AC voltage with output by the HERIC inverter.So that by making this single-phase HERIC SPWM inverter it is possible to be efficient and produce the power supply that will be used.

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Lakshmi, G. Sree, and S. Naveen Kumar. "Comparison of Multilevel Inverters with T-type MLI: A Brief Review." Jurnal Kejuruteraan 35, no. 4 (July 30, 2023): 803–9. http://dx.doi.org/10.17576/jkukm-2023-35(4)-02.

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This paper gives a comparative analysis of different types of Multilevel Inverters with T-Type inverters. The principal aim of the work is to analyse the T-type multilevel inverter operation with different multilevel inverters such as DiodeClamped Multilevel Inverter, Flying Capacitor Multilevel Inverter and Cascaded H-bridge Multilevel Inverter. All the inverters are compared and their advantages, disadvantages and usages are specified. The inverter used in our work runs on the multilayer bidirectional DC-DC converter. This can be used in Renewable Energy Sources and Electric Vehicle applications. The proposed design includes two power switches with an additional capacitor to balance the currents of the multilayer T-type (MLI) capacitor during an entire drive pattern or fault circumstances. In this design, the big capacitors being electrolytic in T-type Multilevel Inverter has been exchanged with longer-lasting film capacitors due to the highfrequency cycle-by-cycle current security between CN and CP. The converter’s dimensions and weight would be lowered by 20% because of this topology, as the number of switches and the capacitors used for balancing is reduced in this proposed design. The simulation analysis for five-level conventional T-type inverter and proposed T-type inverter with capacitor voltage balancing is done. The line-to-line voltages, line currents, phase voltages, three-phase voltages, and voltage total harmonic distortions are compared for conventional T-type inverter and proposed T-type inverter with capacitor voltage balancing. The simulation results shows that the proposed T-type inverter gives better performance compared to conventional T-type multilevel inverter.

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Balaji, V., Uppili Subha, and G. Joga Rao. "A Reduced Switch Count Seven Level Symmetrical Inverter with Low Distortion." International Journal of Recent Technology and Engineering (IJRTE) 10, no. 2 (July 30, 2021): 181–86. http://dx.doi.org/10.35940/ijrte.b6032.0710221.

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Various types of new structures in multilevel inverters are evolving day by day. One among those is the reduced switch count type multilevel inverters. This inverter consists of low number of switches, gate driver components, and other switches like auxiliary switches. Depending on the value of the voltage sources we have symmetrical and asymmetrical multilevel inverters. In this paper, the seven level symmetrical inverter design is shown for seven levels in its output. The output voltage waveform is plotted and its FFT is performed and the THD values are shown. The inverter is simulated in SIMULINK software. Index Terms: Seven level MLI, inverter, and Modular Inverter.

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Babaei, Ebrahim, and Sara Laali. "New Extendable 15-Level Basic Unit for Multilevel Inverters." Journal of Circuits, Systems and Computers 25, no. 12 (September 2, 2016): 1650151. http://dx.doi.org/10.1142/s0218126616501516.

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In this paper, a new basic 15-level inverter is proposed. By developing the proposed basic unit, a 71-level inverter and generally an [Formula: see text]-level inverter are proposed. Then, the proposed multilevel inverter is compared with several conventional multilevel inverters in design of minimum 15 levels and 71 levels at the output. By comparing these inverters, it is obtained that the proposed inverter is able to generate higher number of output levels by using lower number of DC voltage sources and power electronic devices that lead to decreased complexity, installation space and total cost of the inverter. Finally, the correct performance of the proposed inverter is reconfirmed through the simulation and experimental results of a 15-level inverter.

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Chen, Weimin, Shengnan Xia, and Kefeng Yin. "The current status and development of DC/AC inverter technology." Highlights in Science, Engineering and Technology 43 (April 14, 2023): 527–36. http://dx.doi.org/10.54097/hset.v43i.7473.

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The advantages, applications, and development trends of DC/AC inverter technology are compared with conventional inverter technology. The traditional DC/AC inverter technology of the low-frequency link inverter process has been gradually replaced by the high-frequency band inverter process. The replacement of the industrial frequency transformer in the low-frequency link inverter process technology with a high-frequency transformer further optimizes and improves the low-frequency link inverter process technology and significantly enhances the characteristics of the inverter. In this paper, some new inverters are highlighted. The focus is on a new high-frequency chain inverter using a unipolar SPWM control method to design different drive logic control switch tubes. A single-stage single-phase high-to-low voltage converter is widely used to interchange solar and wind turbine power supplies. They all belong to PV inverters with high reliability and a wide input voltage range. These completely solve the problems of large size, high ratio, and poor dynamic response of low-frequency transformers. Future trends in inverters at this stage are mainly characterized by high frequency, high performance, and high input power factor.

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Putra, Sony Prakarsa, and Zulwisli Zulwisli. "INVERTER PWM UNTUK MENGGERAKKAN MESIN ARUS SEARAH TANPA SIKAT BERBASIS ARDUINO." Voteteknika (Vocational Teknik Elektronika dan Informatika) 7, no. 4 (January 28, 2020): 68. http://dx.doi.org/10.24036/voteteknika.v7i4.106466.

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This study aims to create a PWM inverter that can drive the Brushless Unidirectional Flow Machine (MASTS). PWM inverters are intended to correct deficiencies in six-step inverters. Inverter is a circuit that is used to convert a DC voltage source into an AC voltage with a certain frequency. The use of inverters is found in electric vehicles. The system often used to control an inverter is a Pulse Width Modulation (PWM) based control, where pulse width is used to regulate speed. The inverter is tested using 3 pairs of mosfets as a switch to control the three-phase output of the inverter. In the inverter, PWM is used to adjust the width of the frequency pulse that will be given to the mosfet. This research used 3 variations of duty cycle 30%, 60%, 90% to determine the effect of MASTS speed on PWM by using a PWM inverter. The results of this study the speed of MASTS can be influenced by changes in duty cycle, with increasing value of the duty cycle, the faster the speed of MASTS, and vice versa. Keywords:Mosfet, Sensor Hall, MASTS, PWM, Inverter.

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V.V, Kamal, Akhil Ahammed KE, and Unnikrishnan P. "Switched Inductor Z Source Inverters for High Boost Applications." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 07, no. 09 (September 1, 2023): 1–11. http://dx.doi.org/10.55041/ijsrem25831.

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Abstract—This paper analyses a different configuration for the classical Z-Source Inverters (ZSI) which is named as Switched Inductor Z-Source Inverters (SL-ZSI) through simulation results. This configuration uses a unique impedance network that helps in the voltage adjustability. Comparing with the ordinary Z-source inverter, the new configuration provides more voltage inversion ability and enhances the output power quality of the main circuit considerably. The various applications of this configuration include DC-AC, AC-AC, DC-DC and AC-DC power conversions. Index Terms—Inverter, voltage source inverter (VSI), Z-source inverter (ZSI), switched inductor Z-source inverter (SI-ZSI)

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Susheela, N., and P. Satish Kumar. "Performance evaluation and comparison of diode clamped multilevel inverter and hybrid inverter based on PD and APOD modulation techniques." International Journal of Advances in Applied Sciences 8, no. 2 (June 1, 2019): 143. http://dx.doi.org/10.11591/ijaas.v8.i2.pp143-153.

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<p>The popularity of multilevel inverters have increasing over the years in various applications without use of a transformer and has many benefits. This work presents the performance and comparative analysis of single phase diode clamped multilevel inverter and a hybrid inverter with reduced number of components. As there are some drawbacks of diode clamped multilevel inverter such as requiring higher number of components, PWM control method is complex and capacitor voltage balancing problem, an implementation of hybrid inverter that requires fewer components and less carrier signals when compared to conventional multilevel inverters is discussed. The performance of single phase diode clamped multilevel inverter and hybrid multilevel inverter for seven, nine and eleven levels is performed using phase disposition, alternate phase opposition disposition sinusoidal pulse width modulation techniques. Both the multilevel inverter are implemented for the above mentioned multicarrier based Pulse Width Modulation methods for R and R-L loads. The total harmonic distortion is evaluated at various modulation indices. The analysis of the multilevel inverters is done by simulation in matlab / simulink environment.</p>

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Kumar Nallamekala, Kiran, K. Venkat Raman, and Md Asif. "Harmonic cancellation in a Multi-level Inverter Configuration Suitable for PV Applications." International Journal of Engineering & Technology 7, no. 4.6 (September 25, 2018): 177. http://dx.doi.org/10.14419/ijet.v7i4.6.20459.

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Multi-level inverters are playing a major role in PV based systems because of numerous advantages like low dv/dt, better harmonic profile so on. But, conventional multi-level inverters consist of some drawbacks like capacitor balancing issues, greater requirement of capacitor banks and clamping diodes. To address these issues, a novel multi-level inverter has been presented in this paper, which can function as a seven-level, five-level and three-level inverter. The inverter circuit utilizes six switching devices and two isolated DC voltage sources. Moreover, when it is operated as a three-level inverter, a unipolar PWM technique is applied to the circuit which shifts all the lower order harmonics to twice of switching frequency whereas in conventional multi-level inverters, all the harmonics of lower order are present around switching frequency. In addition, proposed inverter can operate even if some switching devices of the circuit fails. Also, the behavior of the inverter during the failure of some switching devices and DC source is analyzed. The proposed inverter is simulated in MATLAB/Simulink and the results are also discussed.

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Pratomo, Leonardus Heru, Slamet Riyadi, and Neru Hatta Tantyono. "A new single DC source five-level buck-boost inverter for single phase application." International Journal of Power Electronics and Drive Systems (IJPEDS) 15, no. 1 (March 1, 2024): 335. http://dx.doi.org/10.11591/ijpeds.v15.i1.pp335-344.

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Recent decades have seen an amazingly fast development of inverter topology, including multilevel inverters. This kind of inverter typically functions as a buck converter; a boost converter is the reverse of this kind of inverter. The two inverters limitation to operating in either buck mode or boost mode is a negative. In this study, a five-level inverter that can operate in both buck and boost modes and only requires a single DC source input voltage is proposed. The suggested inverter will therefore have a large operational area. This new inverter's possible conduction modes are examined in order to determine the control system that will be used. A test based on computational modeling and hardware implementation is then conducted in the lab after the new control structure based on sinusoidal pulse width modulation is established. This new inverter can operate in five-level in a buck and/or boost converter in terms of the output voltage to the input voltage, according to the results of simulation and testing. The proposed new inverter outperforms traditional inverters that solely run on buck or boost.

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Gunawardane, Kosala, Nalin Bandara, Kasun Subasinghage, and Nihal Kularatna. "Extending the Input Voltage Range of Solar PV Inverters with Supercapacitor Energy Circulation." Electronics 10, no. 1 (January 4, 2021): 88. http://dx.doi.org/10.3390/electronics10010088.

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Cleaner and greener energy sources have proliferated on a worldwide basis, creating distributed energy systems. Given the unreliable nature of the renewable sources such as solar and wind, they are traditionally based on inverters interfaced with legacy AC grid systems. While efficiency, output waveform quality and other technical specifications of inverters keep improving gradually, only limited attention is given to widening the input range of inverters. This paper presents a new supercapacitor assisted (SCA) technique to widen the input range of an inverter without modifying the inverter itself. Developing a prototype version of a 24 V DC input capable supercapacitor-assisted wide input (SCASWI) inverter using a supercapacitor circulation front end and a commercial 12 V DC line frequency inverter is detailed in the article, explaining how the SCASWI inverter technique doubles the input voltage while maintaining the useful characteristics of the commercial inverter. The new technique has the added advantage of DC-UPS capability based on a long-life supercapacitor module.

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Vijayakumar, Arun, Albert Alexander Stonier, Geno Peter, Praghash Kumaresan, and Elenor M. Reyes. "A Modified Seven-Level Inverter with Inverted Sine Wave Carrier for PWM Control." International Transactions on Electrical Energy Systems 2022 (July 21, 2022): 1–12. http://dx.doi.org/10.1155/2022/7403079.

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The conventional multilevel inverter necessitates more active switching devices and high dc-link voltages. To minimalize the employment of switching devices and dc-link voltages, a novel topology has been proposed. In this paper, a novel minimum switch multilevel inverter is established using six switches and two dc-link voltages in the proportion of 1 : 2. In addition, the proposed topology is proficient in making seven-level voltages by appropriate gate signals. The PWM signals were produced using several inverted sine carriers and a single trapezoidal reference. When compared to other existing inverters, this configuration needs fewer components, as well as fewer gate drives. Furthermore, this module can generate a negative level without the use of a supplementary circuit such as an H-Bridge. As a result, overall cost and complexity are greatly reduced. The proposed minimum switch multilevel inverter operation is validated through simulations followed by experimental results of a prototype.

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Mustikasari, Riya, Muhammad Jazuli Shubhi, Langlang Gumilar, Sujito Sujito, and Aripriharta Aripriharta. "Inverter Performance Comparison On Solar Panel Applications." Circuit: Jurnal Ilmiah Pendidikan Teknik Elektro 7, no. 2 (August 17, 2023): 142. http://dx.doi.org/10.22373/crc.v7i2.17631.

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In this study, the effects of harmonics on the quality of the electrical power produced by both types of inverters are compared in solar panel applications between pure sine wave and modified sine wave inverters. Additionally, a number of prior investigations into harmonics and inverters have been analyzed. This study was done to find the best kind of inverter to use with solar panels in order to increase the effectiveness and caliber of the electricity generated. Experimental research methodology is applied, with measurements of the electrical power quality produced by both types of inverters under the identical circumstances. According to the findings, the modified sine wave inverter has a higher THD power quality than the pure sine wave inverter. The modified sine wave's displacement power factor (DPF) cannot be more than one (one), but the pure sine wave's DPF is equal to the cos phi value. At a 200W load, the pure sine wave inverter has a power efficiency of 93.35% while the modified sine wave inverter has an efficiency of 81.50%. Given that modified sine waves have a higher harmonic influence, it may be said that pure sine wave inverters create electrical power of a higher quality. Therefore, it is highly advised to utilize a pure sine wave inverter for solar panel applications.

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Priajana, P. G. G., I. N. S. Kumara, and I. N. Setiawan. "GRID TIE INVERTER UNTUK PLTS ATAP DI INDONESIA: REVIEW STANDAR DAN INVERTER YANG COMPLIANCE DI PASAR DOMESTIK." Jurnal SPEKTRUM 7, no. 2 (June 4, 2020): 62. http://dx.doi.org/10.24843/spektrum.2020.v07.i02.p9.

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The Government started a million solar rooftop movement to help accelerate Indonesia'srenewable energy target in 2025. In effect of ministerial regulation 49/2018, householdcustomers are able to install grid tie photovoltaic and export excess energy to PLN. Inverter is acomplex and a vital component to the performance of grid tie photovoltaic systems, thereforeinverter used must follow applicable standard. This article reviews the avaibility of inverters forsolar rooftop in Indonesia. The purpose of this article is to know the avaibility of inverter andhow they are seen from applicable standard. From this research produced inverter databaseconsisted of 513 inverter models. Inverter database then analyzed seen from its manufacturingstatus, inverter power output capacity, THD output, efficiency, and price. This information iscrucial in choosing quality inverter so rooftop photovoltaic would work effectively andsustainably. Presently various inverters with capacity 0,5 kW - 10 kW already available which issuitable for solar rooftop application. There are already plenty inverters with THD output <3%that conform with Indonesia’s standard but many also still have not listed their THD output.Inverter efficiency is already >95% and available with an average price of Rp3,435,380/kW. Listof inverter models that conform standard and certification presented in a table which served asoutput of this research.

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Wang, Xinyi. "Investigation of improved Differential Y-source inverter." Journal of Physics: Conference Series 2649, no. 1 (November 1, 2023): 012052. http://dx.doi.org/10.1088/1742-6596/2649/1/012052.

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Abstract Y-typed networking with three winding-coupled inverter is a brand-new DC-DC and DC-AC inverter. The inverter has a simple topology structure. However, it owns powerful functions. The inverter, with two Y-shaped structures, has not adopted two independent circuits, which are replaced by some new topology parts, such as the switches, adding up to control the current. Obviously, it has now become a single-stage inverter. The improved inverter has also been called DYSI, the Differential Y-source Inverter, for it combines the Differential Boost Inverter with the Y-source Inverter. The improved inverter would produce high AC output voltage, solving the problems caused by the low output voltage in photovoltaic inverters while increasing voltages to connect with the national grid. The modulation of the improved inverter is the half-sine wave, which drives one coupled and two switches in the branch to conduct at high times. The improved inverter also has some defects. The inverter would produce abrupt energy leakage because of the incomplete coupling of inductances. Similar to other inverters, the process during which the switches turn on and turn off would inevitably generate power loss, leading to a much lower output than the ideal design. In contrast, the deficiency could be decreased by adding two diodes without loss to the circuit topology.

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Rashmi, M. R., and B. Anu. "Cascading of Diode Clamped Multilevel Inverter Boosters for High Voltage Applications." Applied Mechanics and Materials 313-314 (March 2013): 876–81. http://dx.doi.org/10.4028/www.scientific.net/amm.313-314.876.

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Nonconventional energy sources are playing important role in meeting current power/energy demands. However these sources cannot provide High voltage/power. For power conditioning and voltage amplification solid state power converters are very much essential. One such approach to obtain high voltage was to use cascaded multilevel inverter but cascaded multilevel inverters require separate DC sources and they cannot be used for regenerative applications. To overcome these limitations, a novel configuration is using diode clamped multilevel inverter is proposed here. . The conditioned DC voltage from photovoltaic cells or fuel cells or batteries is boosted and inverted by means of multistage Multilevel Inverters (MLI). Three different configurations are presented in this paper. From the simulation results of all three configurations, the topology which is found to be better is implemented in the real time. A proto type is developed to boost 40 V input DC to 100 V AC and the experimental results for the same are presented.

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Albatran, Saher, Issam A. Smadi, and Mohammad A. Alsyouf. "Experimental Validation of Shared Inverter Topology to Drive Multi AC-Loads." International Journal of Electrical and Computer Engineering (IJECE) 8, no. 2 (April 1, 2018): 793. http://dx.doi.org/10.11591/ijece.v8i2.pp793-805.

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Many reduced-switch-count (RSC) inverter topologies have been proposed in the literature. As the number of switches required to produce a set of voltages in RSC inverters are less than that in conventional inverter, as a result utilizing RSC inverters in a certain system reduces its size and cost. In this paper, a novel RSC shared inverter topology consisting of fifteen switches and capable of driving four three-phase AC-loads independently is proposed and experimentally verified. A carrier-based pulse width modulation (PWM) technique that employs the zero-sequence-signal injection principle is developed to drive the proposed inverter along with adequate DC voltage bus utilization between the shared loads for common frequency (CF) as well as different frequency (DF) modes. The structure and the principle of operation of the proposed inverter are introduced and intensively verified using simulation and field-programmable-gate-array (FPGA)-in-the-loop simulation under linear and nonlinear loads. Then, Inverter prototype was built and the proposed inverter has been verified experimentally. The experimental results verify the applicability of the proposed inverter and the employed PWM.

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Muc, A., and J. Iwaszkiewicz. "Performance of an OVT inverter reliant on the switching frequency of the filtering inverter." Renewable Energy and Power Quality Journal 21, no. 1 (July 2023): 683–88. http://dx.doi.org/10.24084/repqj21.450.

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The paper presents an inverter based on the orthogonal space vectors theory (OVT inverter) and its performance. The OVT inverter consists of two constituent twolevel 3-phase inverters: the main inverter (MI) and the auxiliary one (AI). The MI is controlled in a simple way to generate the stepped output voltage and the AI works as an active filter limiting the higher harmonics in the OVT output voltage. The filtering process is formed by the use of the orthogonal space vector theory. The output voltage of the OVT inverter takes the shape of a stepped voltage comparable to the voltage generated by multilevel inverters. The AI operates as a very effective active power filter (APF) of the OVT inverter output voltage. The AI power is significantly lower in comparison to the MI power nevertheless its switching frequency affects the OVT performance. The article describes studies in which the impact of changes in the switching frequency filter inverter on the operation of the orthogonal inverter and the output voltage THD. Increasing the filter inverter switching frequency improved performance and reduced the transformer size, which acts as a summing node.

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Kwak, Yun-gi, Dae-ho Heo, Sun-Pil Kim, Sung-Geun Song, Sung-Jun Park, and Feel-soon Kang. "Reliability and Economic Efficiency Analysis of 4-Leg Inverter Compared with 3-Leg Inverters." Electronics 10, no. 1 (January 4, 2021): 87. http://dx.doi.org/10.3390/electronics10010087.

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The 4-leg inverter can adjust the load current or output voltage even under unbalanced load conditions, but it is known that the additional switch arm to the 3-leg inverter can increase the overall cost and the failure rate. This paper aims to analyze the failure rate and mean time between failures (MTBF) of 3-leg inverters and 4-leg inverters using part count failure analysis (PCA) and fault-tree analysis (FTA), and to compare the price of the inverters. The FTA can analyze the failure rate, including the type, number and connection status of the circuit components, and moreover the redundancy effect of the 4-leg inverter. For more accurate failure-rate prediction, the failure rate and MTBF of the 4-leg inverter according to the lifecycle of the controller are analyzed. Finally, by comparing the price of 3-leg inverters and 4-leg inverters using the cost model of major parts, the degree of reliability improvement against price increase is quantitatively analyzed.

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Chen, Rong. "Research on Topology and its Performance of Grid-Connected Inverter for Direct-Driven Wind Power." Advanced Materials Research 846-847 (November 2013): 701–5. http://dx.doi.org/10.4028/www.scientific.net/amr.846-847.701.

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It is necessary that the grid-connected inverter was set up in wind power, in order to convey energy generated in wind power to the grid. There are many sorts of inverters, but only two sorts of inverters suit wind power system, which are current-source inverter and voltage-source inverter, and only the later is being widely used. Their configuration, principle, control and characteristic were analyzed in this paper. Results have shown that, voltage-source grid-connected inverter has been the core of the commutation control configuration of direct-driven wind power, which is decided by the peculiarity of itself.

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Rana, Ronak A., Sujal A. Patel, Anand Muthusamy, Chee woo Lee, and Hee-Je Kim. "Review of Multilevel Voltage Source Inverter Topologies and Analysis of Harmonics Distortions in FC-MLI." Electronics 8, no. 11 (November 11, 2019): 1329. http://dx.doi.org/10.3390/electronics8111329.

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We review the most common topology of multi-level inverters. As is known, the conventional inverters are utilized to create an alternating current (AC) source from a direct current (DC) source. The two-level inverter provides various output voltages [(Vdc/2) and (−Vdc/2)] of the load. It is a successive method, but it makes the harmonic distortion of the output side, Electromagnetic interference (EMI), and high dv/dt. We solve this problem by constructing the sinusoidal voltage waveform. This is achieved by a “multilevel inverter” (MLI). The multilevel inverter creates the output voltage with multiple DC voltages as inputs. Many voltage levels are combined to produce a smoother waveform. During the last decade, the multilevel inverter has become very popular in medium and high-power applications with some advantages, such as the reduced power dissipation of switching elements, low harmonics, and low EMIs. We introduce the information about several multilevel inverters such as the diode-clamped multilevel inverter (DC-MLI), cascaded H-bridge multilevel inverter (CHB-MLI), and flying-capacitor multilevel inverter (FC-MLI) with Power systems CAD (PSCAD) simulation. It is shown that THD is 28.88% in three level FC-MLI while THD is 18.56% in five level topology. Therefore, we can decrease the total harmonic distortion adopting the higher-level topology.

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Dr. Sujatha Balaraman,, P. Yogini. "Three Phase Eleven Level Modular Multilevel Inverter with PD-PWM for Grid Connected System." International Journal for Modern Trends in Science and Technology, no. 8 (August 7, 2020): 86–91. http://dx.doi.org/10.46501/ijmtst060816.

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The prominence of Modular Multilevel Inverters (MMI) is rising owing their merits of simple mechanical construction and good voltage sharing for semiconductor devices. Mostly Multilevel Inverters use more than one source; however, the effective use of all the sources at all levels is rare. Conventional Multilevel Inverters will diminish the energy efficiency of the conversion system. When compared to conventional multilevel inverter, Modular Multilevel Inverter with a high numbers of voltage levels seem to be the most suitable because of the use of an isolated dc source. This paper explores a three-phase eleven level modular multilevel inverter with phase disposition pulse width modulation technique (PD-PWM) that can extract power from all the sources at all the levels. Besides, this paper develops a synchronous d-q reference frame controller to control the current of 11kV. When compared with Reduced Switch Count based Multilevel Inverter Series/Parallel switching topologies, the Modular Multilevel Inverter provides better Total Harmonic Distortion (THD) of output voltage and utilization factor.

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Priyanka, G., J. Surya Kumari, D. Lenine, Suresh Kumar Tummala, Hassan Mohmmed Al-Jawahry, and Harshit Gupta. "Reduced Common Mode Multilevel Inverter Strategy in Photovoltaic Systems." E3S Web of Conferences 391 (2023): 01136. http://dx.doi.org/10.1051/e3sconf/202339101136.

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Now-a-days, non-conventional energy sources are playing a vital role in the generation of electrical energy. This is due to the disadvantages in the conventional sources like pollution, non-availability of the resources, greenhouse effect. Hence more concentration is made by the researcher’s on these non-conventional sources so called as renewable energy sources. These renewable sources are used with the converters along with filters to give the best output. In this work, we are focusing on the renewable energy called solar energy and hence the converter is inverter in this case. Basically we have conventional inverters as well as multilevel inverters. Multilevel inverters are basically classified into three types and they are cascaded H-bridge multilevel inverter, diode clamped multilevel inverter, flying capacitor multilevel inverter. Among these cascaded multilevel inverter as many advantages like reduced number of components. This advantage is being used in this work and is simulated by using MATLAB.

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Iwaszkiewicz, J., and A. Muc. "Output voltage control of the OVT inverter." Renewable Energy and Power Quality Journal 21, no. 1 (July 2023): 707–11. http://dx.doi.org/10.24084/repqj21.456.

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The paper presents the possibility of the output voltage control of an OVT inverter. The idea of the OVT inverter construction is based on the orthogonal space vectors theory. The OVT inverter is built of two components two-level three-phase inverters: the main inverter (MI) and the auxiliary one (AI). The output voltage of the OVT inverter takes the shape of a stepped voltage analogous to the voltage generated by multilevel inverters. The paper demonstrates possible control methods of the output voltage frequency and amplitude. The results obtained during simulation studies prove that the output voltage essential parameters may be a function of the DC voltage and the control circuitry permits easy defining a selection of voltage/frequency characteristics.

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Kranzer, Dirk, Florian Reiners, Christian Wilhelm, and Bruno Burger. "System Improvements of Photovoltaic Inverters with SiC-Transistors." Materials Science Forum 645-648 (April 2010): 1171–76. http://dx.doi.org/10.4028/www.scientific.net/msf.645-648.1171.

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In this paper the system improvements of PV-inverters with SiC-transistors are demonstrated. The basic characteristics of engineering prototypes of normally-off SiC-JFETs and SiC-MOSFETs were measured and their differences in the application are considered. To demonstrate the improvement in PV-inverter performance, a 5 kW single-phase and a three-phase full bridge inverter with normally-off SiC-JFETs were developed at Fraunhofer ISE. Different switching frequencies up to 144 kHz were applied and the impact on production costs and inverter performance was rated under the aspects of an industrial product development. This means, the influences on the efficiency and power density. In this work, a world record in PV-inverter efficiency of 99 % was achieved in a single-phase inverter and for the three-pase inverter, the power density was tripled with respect to commercially available state of the art PV-inverters.

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Zakerian, Ali, and Daryoosh Nazarpour. "New Hybrid Structure Based on Improved Switched Inductor Z-Source and Parallel Inverters for Renewable Energy Systems." International Journal of Power Electronics and Drive Systems (IJPEDS) 6, no. 3 (September 1, 2015): 636. http://dx.doi.org/10.11591/ijpeds.v6.i3.pp636-647.

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Nowadays, more and more distributed generations and renewable energy sources, such as wind, solar and tidal power, are connected to the public grid by the means of power inverters. They often form microgrids before being connected to the public grid. Due to the availability of high current power electronic devices, it is inevitable to use several inverters in parallel for high-power and/or low-cost applications. So, inverters should be connected in parallel to provide system redundancy and high reliability, which are important for critical customers. In this paper, the modeling, designing and stability analysis of parallel-connected three-phase inverters are derived for application in renewable energy systems. To enlarge voltage adjustability, the proposed inverter employs an improved switched inductor Z-source impedance network to couple the main circuit and the power source. Compared with the classical Z-source inverter (ZSI) and switched inductor Z-source inverter (SL-ZSI), the proposed inverter significantly increases the voltage boost inversion ability and also can increase the power capacity and the reliability of inverter systems. The proposed topology and its performances are validated using simulation results which are obtained in Matlab/Simulink.

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34

Eko Dwi Wahono and Iskendar. "ANALISIS PENGARUH INFILTRASI PADA AC SPLIT INVERTER TERHADAP KECEPATAN PENDINGINAN DAN PENGHEMATAN ENERGI." Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin 10, no. 2 (July 9, 2020): 36–42. http://dx.doi.org/10.35814/teknobiz.v10i2.1490.

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In this study an analysis of the relationship between infiltration with cooling speed and analysis of the relationship between infiltration with energy savings in AC Inverters and Non-Inverter ACs. Data collected include time, door opening fully open, ¾, ½, and ¼, indoor temperature (TD), outdoor temperature (TL), current, voltage and power factor on AC Inverters and Non-Inverter ACs. From the temperatur data in space and time and door opening, infiltration and cooling speed are calculated. Data from current, voltage and power factor are then calculated energi. After infiltration, cooling speed and energy obtained from calculations, a simple linear regression analysis and Independent Sample T-Test analysis are performed. Regression analysis was performed to determine the relationship between infiltration and cooling speed. The relationship between infiltration and energi savings, this analysis is carried out in a room that uses AC Inverter and AC Non Inverter. After that the analysis of the Independent Sample T-Test between the energi consumption of AC Inverters and AC Non Inverters. In addition to analysis with software, calculations are also carried out so that energi consumption can be known to save AC Inverter after that, then conclusions can be drawn.

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Chen, Rong, and Jun Long Tian. "Research on Topology and Performance of Grid-Connected Inverter for Direct-Driven WGS." Applied Mechanics and Materials 446-447 (November 2013): 772–76. http://dx.doi.org/10.4028/www.scientific.net/amm.446-447.772.

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It is necessary that the grid-connected inverter was set up in wind generation system (WGS), in order to convey energy generated in WGS to the electrical grid. There are many sorts of inverters, but only two sorts of inverters suit wind generation system, which are current-source and voltage-source inverter, and only the latter is being widely used. The configuration, principle, control and characteristic of the two inverters were analyzed. Results have shown that, voltage-source grid-connected inverter has been the core of the commutation control configuration of direct-driven WGS, which is decided by the peculiarity of itself.

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Srinivasan, Ganesh Kumar, Marco Rivera, Vijayaraja Loganathan, Dhanasekar Ravikumar, and Balaji Mohan. "Trends and Challenges in Multi-Level Inverter with Reduced Switches." Electronics 10, no. 4 (February 3, 2021): 368. http://dx.doi.org/10.3390/electronics10040368.

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Multilevel inverter had been paid a lot of attention from the academia and research community in recent times due to its role in high and medium power applications. In this paper, a detailed survey is made on the recently designed multilevel inverter to find the suitability of the inverters for particular applications. Research is performed on various types of multilevel inverters such as: Symmetric, asymmetric, hybrid and modularized multilevel inverter in order to identify the issues in generating more levels at the output. A summary of various issues in multilevel inverter with reduced switch count is provided, so that a novel topology of multilevel inverter can be designed in future. Further, an 81-level switched ladder multilevel inverter using unidirectional and bidirectional switches is designed. Simulation work is carried out using Matlab/Simulink in order to validate the performance of the inverter with change in resistive load and impedance load. The output of the 81-level inverter is fed to a 110 V, 186.5 W single phase induction motor in order to study the characteristics, further speed control of motor is performed by varying the input voltage of the motor and the results are presented.

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Jung, Sang-Min, Ki-Young Choi, Sang-Hyuk Jung, and Rae-Young Kim. "LCpL Filter Design and Control for Stability Improvement in a Stand-Alone Microgrid with Sub Inverter Structure." Energies 12, no. 12 (June 17, 2019): 2318. http://dx.doi.org/10.3390/en12122318.

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The inverter of an energy storage system, which plays an important role in maintaining the voltage of a stand-alone microgrid, can shut down in response to external or internal abnormal conditions. Such a protective measure can cause the microgrid to blackout. A redundant inverter can be configured to respond upon failure of the main inverter to ensure higher stability of the stand-alone microgrid. However, the microgrid may experience several to tens of blackout cycles when the main inverter fails owing to a time delay in the operation of the sub inverter. To overcome this limitation, we propose an LCpL filter for suppressing any sudden changes in the microgrid during the transition period between the main and sub inverters. In addition, this study also describes a control method for the sub inverter to prevent system blackouts. A 100 kW microgrid system consisting of two 100 kW inverters with LCpL filters and loads was used to demonstrate the efficacy/utility of the proposed method.

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Noor, Shahreen, Md Noman Habib Khan, and K. M. Abdul Al Woadud. "Cost and Efficiency Analysis of PV Transformer-Less Inverter Topology to Grid Connection." European Journal of Engineering Research and Science 2, no. 3 (March 16, 2017): 17. http://dx.doi.org/10.24018/ejers.2017.2.3.290.

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Photovoltaic (PV) inverters bear a part and parcel role due to cost and power efficiency where it can be used either in Transformer based system or Transformer-less system. Both system even though the renewable energy which is fully Environmental friendly, however some limitations such as bulky system, maintenance cost increasing indicate for avoiding the Transformer based inverter. In contrast, Transformer -less inverter topology is recovering the TRX based issue and to reduce the overall system cost size with high efficiency. In this paper, Transformer -based inverters have been discussed as well as Transformer –less (TRX) inverter topologies and main focusing part is the cost analysis of TRX inverter topology to grid connection and the different marking process of PV-TRX Inverter Topology to Grid Connection has been shown as well as comparison will be shown with Bangladesh.

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39

Noor, Shahreen, Md Noman Habib Khan, and K. M. Abdul Al Woadud. "Cost and Efficiency Analysis of PV Transformer-Less Inverter Topology to Grid Connection." European Journal of Engineering and Technology Research 2, no. 3 (March 16, 2017): 17–23. http://dx.doi.org/10.24018/ejeng.2017.2.3.290.

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Photovoltaic (PV) inverters bear a part and parcel role due to cost and power efficiency where it can be used either in Transformer based system or Transformer-less system. Both system even though the renewable energy which is fully Environmental friendly, however some limitations such as bulky system, maintenance cost increasing indicate for avoiding the Transformer based inverter. In contrast, Transformer -less inverter topology is recovering the TRX based issue and to reduce the overall system cost size with high efficiency. In this paper, Transformer -based inverters have been discussed as well as Transformer –less (TRX) inverter topologies and main focusing part is the cost analysis of TRX inverter topology to grid connection and the different marking process of PV-TRX Inverter Topology to Grid Connection has been shown as well as comparison will be shown with Bangladesh.

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40

MILIĆEVIĆ, MIROSLAV, and VALENTINA NEJKOVIĆ. "CONTRIBUTION TO THE DESIGN OF INVERTER CONVERTERS FOR HEATING AND WELDING AT HIGHER FREQUENCIES." REVUE ROUMAINE DES SCIENCES TECHNIQUES — SÉRIE ÉLECTROTECHNIQUE ET ÉNERGÉTIQUE 68, no. 4 (December 23, 2023): 345–50. http://dx.doi.org/10.59277/rrst-ee.2023.4.4.

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The paper shows a significant contribution to analytical calculations of half-bridge and full-bridge inverter parameters, aiming to facilitate the operating process itself while designing systems like these. Attempts have been made within the well-known literature to precisely calculate the waveforms of characteristic currents and voltages of the inverter. Due to its complexity, exact explicit analytical forms have yet to be found, but instead, approximate forms were found. Large formulae for inverter currents and voltages prevented them from being used as an inverter project solution. The paper deals with simple analytical dependences for inverters, with a necessary accuracy from the aspect of engineering practice, that can also be directly implemented into calculations for characteristic inverter components and parameters. To confirm the new analytical expressions and method, the paper presents two interesting inverters that can be applied.

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Chen, Jyh Wei, Yi Hong Liu, Chi Hou Chen, Yi Lin Yueh, Yun Chi Tzeng, and Jian Shiang Syu. "Design of Parallel Interleaved-Phase-Shift-PWM Inverters with Voltage Feedback Control." Applied Mechanics and Materials 229-231 (November 2012): 923–28. http://dx.doi.org/10.4028/www.scientific.net/amm.229-231.923.

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The paper is to design and implement parallel operation of paralleled inverters with interleaved phase shift. For parallel operation, one inverter is used as master module to transmit synchronization signals to trigger the external interrupts of two microcontrollers for synchronous operation to slave module. In this paper, the design of voltage controlled loop feedback controller by proportional-integral controller is employed to have fast transient response with different load conditions. It is proposed that interleaved phase shift for parallel inverters could reduce output voltage ripple of inverter and increase the system response. The experimental results show that the proposed inverter provided a voltage output with low harmonic distortion by the proposed interleaving phase-shift parallel inverter scheme.

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G, Nayana, and Dr Savita D. Torvi. "Multilevel Inverter for Solar Photovoltaic Applications - A Review." International Journal for Research in Applied Science and Engineering Technology 11, no. 7 (July 31, 2023): 439–41. http://dx.doi.org/10.22214/ijraset.2023.54669.

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Abstract: This paper presents a review of Multilevel inverter for solar Photovoltaic applications. Design and Implementation of Multilevel Inverters for electric vehicles has been studied. Grid tied PV system using modular multilevel inverter is analysed. Performance analysis of Nested multilevel inverter topology for 72V electric vehicle applications is studied. Multilevel inverter for PV system employing MPPT technique is studied. Power Electronics application in renewable application in renewable energy is studied.

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Rezini, Saliha, and Zin-Eddine Azzouz. "Contribution of Multilevel Inverters in Improving Electrical Energy Quality: Study and Analysis." European Journal of Electrical Engineering 23, no. 3 (June 21, 2021): 255–63. http://dx.doi.org/10.18280/ejee.230310.

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The work proposed in this paper concerns the study of harmonic pollution generated by static converters, particularly inverters, which largely contributes to the degradation of the supplied electrical energy quality. So, we studied in first the EMC of the conventional two-level inverter to highlight the harmful pollution of this kind of converter. We then looked at multi-level inverters to characterize their degree of pollution according to their number of levels in order to propose practical solutions for industrial applications. Thus, we considered three structures of multi-level inverters namely: a diode clamped inverter, a flying capacitor clamped inverter and a cascaded h-bridge inverter. At the end of this study, we retain that these three structures make it possible to obtain a waveform of the output voltage close to the sinusoidal form. The results of simulation obtained and compared to the STD international standard templates, also allowed us to conclude that among the three structures studied the cascaded h-bridge inverter is the most interesting from the electrical energy quality point of view. In addition, this converter has the advantage of owning a reduced number of switches which results in a weight and a cost, better than those of the other two studied inverters.

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Gajula, Ujwala, Kalpanadevi Manivannan, and Nomula Malla Reddy. "Solar PV based seventeen level reduced switch symmetrical multilevel inverter topology fed induction motor." International Journal of Power Electronics and Drive Systems (IJPEDS) 15, no. 2 (June 1, 2024): 1009. http://dx.doi.org/10.11591/ijpeds.v15.i2.pp1009-1016.

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Multilevel inverters have received a lot of interest in recent years due to their ability to deliver more voltage levels than typical two-level inverters. Because of this property, multilevel inverters can produce output waveforms that closely resemble sinusoidal waveforms, lowering harmonic distortion dramatically. The emergence of reduced switch symmetrical multilevel inverter topologies has developed the curiosity of many different power conversion systems. These new topologies offer numerous advantages, including greater output voltage quality, fewer harmonic distortions, and increased power conversion efficiency. The inclusion of these inverters in the feeding of induction motors is one of their many prominent uses. A 17 levels of multi-level inverter (MLI) topology is presented with reduced switch count and harmonic reduction for power quality improvement. The inverter is fed by isolated equal photovoltaic panels which act as direct current or DC source. To reduce complexity, switching pulses are generated using hybrid pulse width modulation technique which is designed as controller. Through the use of MATLAB/Simulink, the performance assessment of a unique cascaded multilevel inverter-based reduced switch symmetrical inverter feeding an induction motor drive has been verified. The harmonic distortion with reduced switches obtained is 7.47% which is comparatively less than when compared with conventional cascaded H-bridge topology.

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Zheng, Chen, Qionglin Li, Lin Zhou, Bin Li, and Mingxuan Mao. "The Interaction Stability Analysis of a Multi-Inverter System Containing Different Types of Inverters." Energies 11, no. 9 (August 27, 2018): 2244. http://dx.doi.org/10.3390/en11092244.

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The existing stability investigations of the system containing different types of inverters are insufficient. The paper aims to reveal the more universal interaction stability mechanism of the system containing different types of inverters. Firstly, the multi-inverter system is decomposed into an admittance network (AN) and excitation sources. Then, the interaction between two different inverters, as well as the interaction between the inverter and the power grid, are analyzed by the root locus method. This reveals that the stability of the interaction between the inverter and the power grid is exclusively determined by AN. However, the stability of the interaction between different inverters not only depends on AN but also relies on whether the two inverters have common right-half plane (RHP) poles. To make the multi-inverter system stable, the following two criteria must be satisfied: (a) AN is stable and (b) any two different inverters do not have the same RHP poles. If criterion (a) is not satisfied, the harmonic resonance will arise in all currents. Resonant harmonics will only circulate among partial inverters and will not inject into the power grid if criterion (a) is satisfied but criterion (b) is not satisfied. Theoretical analysis is validated by simulation and experiment results.

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Sathish Kumar, S., R. Ramkumar, S. Sivarajeswari, D. Ramya, T. Subburaj, and Martin Sankoh. "Performance Enhancement of a Three Phase Boost-Cascaded Fifteen Level Inverter Using the PI Controller." Mathematical Problems in Engineering 2022 (May 19, 2022): 1–17. http://dx.doi.org/10.1155/2022/3888571.

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Photovoltaic power generation is a potential alternative energy source that offers several benefits over other alternative energy sources such as wind, sun, ocean, biomass, geothermal, and so on. Multilevel inverters are essential for power conversion in solar power generation. These multilevel inverters employ three distinct topologies: diode-clamped (neutral-point clamped) inverter, capacitor-clamped (flying capacitor) inverter, and cascaded H-bridge multilevel inverter. The cascaded H-bridge multilevel inverter is more appropriate for photovoltaic applications than the other two topologies. The proposed system asymmetrical cascaded multilevel inverter (ACMLI) is energized using a photovoltaic system (PV). A three-phase cascaded H-bridge fifteen-level inverter for grid-connected solar systems is given in this study utilizing a proportional integral controller. The harmonic distortion was removed using a multicarrier pulse width modulation method. The MATLAB/Simulink is used to simulate the performance of a three-phase cascaded H-bridge fifteen-level inverter in terms of harmonic content and number of switches. To test the performance of the designed system, a hardware prototype was created. From the obtained results, the proposed method reduces the switch count, harmonic distortion, and rejects the external disturbances of input and output variables.

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Susheela, Nunsavath, and P. Satish Kumar. "Performance Evaluation of Multicarrier Based Techniques for Single Phase Hybrid Multilevel Inverter using Reduced Switches." Indonesian Journal of Electrical Engineering and Computer Science 7, no. 3 (September 1, 2017): 676. http://dx.doi.org/10.11591/ijeecs.v7.i3.pp676-686.

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The multilevel inverters are very popular in high power high voltage applications. However the multilevel inverters has some demerits such as requiring higher number of components, PWM control method is complex and capacitor voltage balancing problem. The hybrid multilevel inverter presented in this paper has superior characteristics over conventional multilevel inverters. The hybrid multilevel inverter employs fewer components and less carrier signals when compared to conventional multilevel inverters. It consists of level generation and polarity generation stages which involves high frequency and low frequency switches. The complexity and overall cost for higher output voltage levels are greatly reduced. Implementation of single phase 7-level, 9-level and 11-level hybrid multilevel inverter has been performed using sinusoidal pulse width modulation (SPWM) strategies i.e., phase disposition (PD), alternate phase opposition disposition (APOD) and carrier overlapping (CO). Also the three techniques are compared in terms of total harmonic distortion (THD) for various modulation indices and observed to be greatly improved when compared to conventional topologies. The performance of single phase eleven level hybrid inverter is analyzed for different loads. Simulation is performed using MATLAB/ Simulink.

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Doan, Nam Xuan, and Nho Van Nguyen. "Improved Model Predictive Control for Asymmetric T-Type NPC 3-Level Inverter." Electronics 10, no. 18 (September 13, 2021): 2244. http://dx.doi.org/10.3390/electronics10182244.

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In this paper, a model predictive control for an asymmetric T-type NPC 3-level inverter is presented. The mathematical model and characteristics of the reduced switching topology are described. An improvement for the predicted strategy with the pre-selected candidate vectors is proposed. The simulation and experimental results are provided and show good efficiency for the proposed control algorithm. The improved algorithm greatly reduces execution time by about 18% and delivers a better load current THD than the conventional model for predictive control. For comparison, similar tests are performed on both 2-level and conventional 3-level inverters. Although the current load quality of the asymmetrical inverter is not as good as the traditional 3-level inverter, it is much better than the 2-level inverter. In addition, it has the benefits of significantly reducing overall costs, simpler hardware system design, and faster predictive processing than the conventional 3-level inverters. Therefore, this asymmetric inverter has advantages for an application with the required output characteristics like the conventional 3-level inverter and with lower cost.

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Krikor, K. S., Khalid I. Alnaimi, and Jamal Abdul-Kareem Mohammed. "COMPARATIVE STUDY OF TRADITIONAL PWM INVERTERS AND MULTILEVELS INVERTERS." Journal of Engineering 14, no. 04 (February 24, 2024): 2975–89. http://dx.doi.org/10.31026/j.eng.2008.04.08.

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The need of higher powers in electrical drives has forced the researchers to develop new power source possibilities. Multilevel inverters have been presented as a cost effective solution for various high voltage and high power applications including power quality and motor drive problems. The traditional pulse width modulated (PWM) Inverter does not completely eliminate the unwanted harmonics in the output waveform. Using the multilevel inverter as an alternative to traditional PWM inverters for electric motor drive applications is investigated. The concept of the Optimized Harmonic Elimination Stepped-Waveform (OHESW) technique for a multilevel inverter is presented. The effectiveness of this technique in minimizing the inverter switching losses and its output voltage harmonic content which cause reducing harmonic losses and torque pulsations of an induction motor fed form is investigated analytically. Comparison between the Selective Harmonic Eliminated PWM (SHEPWM) as a traditional PWM technique for three-level inverter and the OHESW technique for multilevel inverter with regard to the switching losses, harmonic distortion, additional harmonic losses in the motor and the pulsating torques is also presented.

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Chmielowiec, Krzysztof, Łukasz Topolski, Aleks Piszczek, and Zbigniew Hanzelka. "Photovoltaic Inverter Profiles in Relation to the European Network Code NC RfG and the Requirements of Polish Distribution System Operators." Energies 14, no. 5 (March 9, 2021): 1486. http://dx.doi.org/10.3390/en14051486.

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The presently observed rapid increase in photovoltaic (PV) micro-installation connections to low-voltage networks, resulting from numerous financial support programmes, European Union (EU) energy policy and growing social awareness of environmental and economic issues, raise the question if PV inverters widely available in EU market fulfil the numerous technical requirements specified in European and Polish regulations. The paper presents the results of an experimental study carried out on three PV Inverters widely available in the EU in accordance with the EU network code NC RfG, standard EN 50549-1:2019 and internal Polish distribution system operators’ (DSOs’) regulations, governing PV inverter cooperation with the low-voltage distribution network. The laboratory test stand scheme and its description are presented. In each test, at least one of the inverters encountered issues, either with the operation in required frequency ranges (one PV inverter), activating reactive power control modes (all three PV inverters), maintaining required power generation gradient after tripping (one PV inverter) or under-voltage ride through immunity (one PV inverter). The obtained results have shown that all tested PV inverters did not meet requirements that are the key to maintaining reliable and safe operation of transmission and distribution electrical networks.

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Journal articles on the topic 'Inverter'

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