Journal articles: 'UPS inverter'

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Ahmed, Toqeer, Faizan Ahmad Khan, Asad Waqar, Shakir Mehmood, Hamza Shakeel, Shahzad Hassan, Tausif Zahid, and Qasim Awais. "Design and Implementation of PV Fed Local UPS Inverter." Pakistan Journal of Engineering and Technology 4, no. 4 (December 16, 2021): 1–8. http://dx.doi.org/10.51846/vol4iss4pp1-8.

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Locally manufactured Uninterruptible Power Supply (UPS) units are purchased as an alternative to rolling blackouts and load shedding in underdeveloped and developing countries like Pakistan. These locally manufactured UPS units are energy-inefficient, causing stress on the national grid and cost-intensive for the residential consumer in the form of high utility bills of electricity. In this regard, the authors have proposed the PV fed local UPS inverter to make the existing UPS unit more efficient through photovoltaic (PV) energy without disrupting its function of providing uninterrupted supply during load-shedding hours. In order to validate the performance of the proposed PV fed local UPS inverter, the maximum power point tracking (MPPT) PV charge controller module is designed and implemented practically in a hardware setup and simulated in MATLAB/Simulink and Proteus environment, respectively. Moreover, the installation of an MPPT PV charge controller module in an existing locally manufactured UPS unit is also discussed. The practical results demonstrate the superiority of the proposed PV fed local UPS inverter with an average efficiency of 81.51% and a lowest total harmonic distortion (THD) of 1.29% as compared to existing UPS inverters.

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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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Unruh, Peter, Maria Nuschke, Philipp Strauß, and Friedrich Welck. "Overview on Grid-Forming Inverter Control Methods." Energies 13, no. 10 (May 20, 2020): 2589. http://dx.doi.org/10.3390/en13102589.

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In this paper, different control approaches for grid-forming inverters are discussed and compared with the grid-forming properties of synchronous machines. Grid-forming inverters are able to operate AC grids with or without rotating machines. In the past, they have been successfully deployed in inverter dominated island grids or in uninterruptable power supply (UPS) systems. It is expected that with increasing shares of inverter-based electrical power generation, grid-forming inverters will also become relevant for interconnected power systems. In contrast to conventional current-controlled inverters, grid-forming inverters do not immediately follow the grid voltage. They form voltage phasors that have an inertial behavior. In consequence, they can inherently deliver momentary reserve and increase power grid resilience.

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Radika, P., and Subhranasu Sekar Dash. "Regenerative snubber for UPS inverter." International Journal of Power Electronics 2, no. 1 (2010): 66. http://dx.doi.org/10.1504/ijpelec.2010.029500.

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Monfared, M. "A simplified control strategy for single-phase UPS inverters." Bulletin of the Polish Academy of Sciences Technical Sciences 62, no. 2 (June 1, 2014): 367–73. http://dx.doi.org/10.2478/bpasts-2014-0037.

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Abstract Though there are many strategies to control single-phase uninterruptible power supply (UPS) inverters, they suffer from some drawbacks, the main being complexity. This paper proposes a simple dual-loop controller for the single-phase UPS inverter with the LC filter. The suggested control scheme uses the capacitor current as the feedback signal in the inner current loop. No fictitious phase generation or reference frame transformations are required, and simple proportional gains are employed as both voltage and current regulators. A feedforward of the derivative of the output voltage is also proposed, which significantly improves the performance of the closed loop control system. Then, based on the model of the inverter with the proposed control strategy, a simple and systematic design procedure is presented. Finally, the theoretical achievements are supported by extensive simulations.

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Irwanto, Muhamad, M. Farreq, Sasongko P. Hadi, N. Gomesh, and Mohd Irwan Yusoff. "Photovoltaic Powered Uninterruptible Power Supply Using Microcontroller PIC16F628-I/P." Key Engineering Materials 594-595 (December 2013): 914–18. http://dx.doi.org/10.4028/www.scientific.net/kem.594-595.914.

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Uninterruptible power supply (UPS) sits between a power supply such as wall outlet and devices to prevent undesired feature that can occur within the power source such as outages, sags, surges and bad harmonics from the supply to avoid a negative impact on the devices. This paper presents a photovoltaic (PV) powered UPS using microcontroller PIC16F628A-I/P. It is a standby UPS whereas if the main power source fails to supply power to loads, a battery powered inverter turns on to continue supplying power. The battery is charged by the PV using solar charger and transfer switch controlled by the microcontroller. The UPS was tested to a load of 240 V, 20 W AC aquarium water pump. The test result shows that the UPS perform well, when the main power source fails, the battery could power inverter and the microcontroller controls the transfer switch of the UPS inverter and the main power source.

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Khan, Hussain, Muhammad Aamir, Muhammad Ali, Asad Waqar, Syed Ali, and Junaid Imtiaz. "Finite Control Set Model Predictive Control for Parallel Connected Online UPS System under Unbalanced and Nonlinear Loads." Energies 12, no. 4 (February 13, 2019): 581. http://dx.doi.org/10.3390/en12040581.

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In this paper, the finite control set model predictive control (FCS–MPC) technique-based controller is proposed for the inverter of the uninterrupted power supply (UPS) system. The proposed controller uses the mathematical model of the system to forecast the response of voltage for each possible switching state for every sampling instant. Following this, the cost function was used to determine the switching state, applied to the next sampling instant. First, the proposed control strategy was implemented for the single inverter of the UPS system. Finally, the droop control strategy was implemented for parallel inverters to guarantee actual power sharing among a multiple-parallel UPS system. To validate the performance of the proposed controller under steady-state conditions and dynamic-transient conditions, extensive simulations were conducted using MATLAB/Simulink. The proposed work shows a low computational burden, good steady state performance, fast transient response, and robust results against parameter disturbances as compared to linear control. The simulation results showed that total harmonic distortion (THD) for the linear load was 0.9% and THD for the nonlinear load was 1.42%.

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Pratama, Rheo Loridho, and Budi Sudiarto. "Karakteristik Disturbansi di Rentang Frekuensi 9-150 kHz Pada Sistem UPS Berbeban Induktif." CIRCUIT: Jurnal Ilmiah Pendidikan Teknik Elektro 4, no. 1 (March 30, 2020): 20. http://dx.doi.org/10.22373/crc.v4i1.6276.

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In every UPS device there are power electronic components including inverters, therefore using an inverter will cause voltage disturbances at high frequency because the switching frequency of the inverter is at high frequency. Data recorded by the oscilloscope along with the Picolog Recorder software and processed by Matlab software to make it more efficient. Research conducted when the UPS uses dual conversion mode and with inductive load variations 0.35 H, 0.7 H, 1.4 H and 2.8 H. The test results show that voltage disturbances occur in three dominant frequency ranges at each level of load variations are 9-19 kHz, 20-30 kHz and 31-41 kHz. In the condition of 10% loading rate with a load of 0.35 H the peak voltage disturbances occur at 81.17 mV in frequency of 9.2 kHz and at the condition of the 75% loading rate with 2.8 H load the peak voltage disturbances that occur at 92.20 mV in frequency of 9.6 kHz. The disturbances voltage increases with the increasing of inductive loads that connected to UPS.

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Simran, Shainey, and Roshan Nayak. "Multi-level PWM Inverter for PV Systems Improving the THD." SAMRIDDHI : A Journal of Physical Sciences, Engineering and Technology 14, no. 02 (June 30, 2022): 211–15. http://dx.doi.org/10.18090/samriddhi.v14i02.15.

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In the last few years, the use of semiconductors in the electronic market has increased a lot, due to which its utilization in power electronic devices has also increased greatly, including UPS, AC drives, HVDC transmission line rectifiers, inverters and many more. We categorize the inverter in many ways like diode line capacitor cascade h-bridge diode climb like this but we do voltage source inverter in two ways if we look like multi-level inverter then two-level inverter multi-level letter Maybe and we are using multi-level inverter here. In this paper, we are discussing the performance of second level inverter using space vector PWM and further using for mains performance using disposition multicarrier moderation. In this paper we are using fuzzy logic to control WM, the factors we are working out are the total harmonics distortion switching frequency switching losses and the number of switching devices. Here the complete simulation is using MATLAB/Simulink software.

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Singh, Asst Prof Ragini, and Dr Santosh Kumar Vishwakarma. "UPS Powered by Solar Renewal Energy." International Journal for Research in Applied Science and Engineering Technology 10, no. 8 (August 31, 2022): 514–19. http://dx.doi.org/10.22214/ijraset.2022.46235.

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Abstract: This paper includes the research and development of a solar powered UPS in India’s electrical market to satisfy the alternate energy source requirements of homes and tiny offices. During this paper circuit configuration, inspection, research pattern used and also the findings of the market study. The planning of the solar UPS includes a specially designed inverter circuit and a solar battery. The inverter circuit has been designed in keeping with the wants of domestic needs. The paper shows study of possibilities of design and functionality of a solar powered UPS. It gives concept that solar UPS is a highly efficient and successful alternative to electrical UPSs within the electrical market. There are two parts during this research first one is solar array which converts solar power into voltage and second is solar inverter which converts DC into electricity.

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Moura de Oliveira, Lincoln, Levy Ferreira Costa, Deivid S. Marins, Sérgio Daher, and Fernando Luiz Marcelo Antunes. "Conception Of Multilevel Inverter Applied To Ups System." Eletrônica de Potência 19, no. 1 (February 1, 2014): 15–23. http://dx.doi.org/10.18618/rep.2014.1.015023.

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12

Chitra, K., and A. Jeevanandham. "Design and implementation of maximum constant boost switched inductor z-source inverter for three-phase on-line uninterrupted power supply." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 34, no. 4 (July 6, 2015): 1101–21. http://dx.doi.org/10.1108/compel-08-2014-0189.

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Purpose – The purpose of this paper is to present the Switched Inductor Z-Source Inverter (SLZSI) topology for three-phase on-line uninterruptible power supply (UPS) by employing third harmonic injected maximum constant boost pulse width modulation (PWM) control. Conventional UPS consists of step-up transformer or boost chopper along with voltage source inverter (VSI) which reduces the efficiency and increases energy conversion cost. The proposed three-phase UPS by using SLZSI has the voltage boost capability through shoot through zero state which is not available in traditional VSI and current source inverter. Design/methodology/approach – Performance of three-phase on-line UPS based on ZLZSI by using third harmonic injected maximum constant boost PWM control is analyzed and evaluated in MATLAB/Simulink software and the results are compared with Z-source inverter (ZSI) fed UPS. Experimental results are presented for the validation of the simulation and theoretical analysis. Findings – The output voltages, currents, THD values, voltage stress and efficiencies for different loading condition are determined and compared with the theoretical values and UPS with ZSI. The experimental results validate the theoretical and simulation results. Originality/value – Compared with the traditional ZSI, the SLZSI provides high-voltage boost inversion ability with a very short shoot through zero state. This proposed UPS by using SLZSI increases the efficiency with less number of components, reduces the harmonics, increases the voltage gain and reduces the voltage stress.

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Zhou, Bin, Jing Chen, Yi Fei Wang, You Xin Yuan, Liang Yuan, and Ping Kuang. "Development of the Mobile Power Supply System with Stabilizing Voltage and Frequency, UPS, Intelligent Charging." Applied Mechanics and Materials 556-562 (May 2014): 1983–86. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.1983.

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According to the principle of a novel integration method with stabilizing voltage and frequency, UPS, intelligent charging for mobile power supply proposed by authors, the mobile UPS system has been developed in this paper. The system is designed by the inverter NB70124 with integration functions and the additional peripheral configuration, such as the touch screen, the circuit breaker, and so on. The following works have been done in the study: the configuration of the mobile UPS system, communication between the touch screen and the inverter, GUI of the mobile UPS system. The system can be realized functions, such as the generating electricity, outputting stabilizing voltage and frequency, UPS, and intelligent charging. By the system, the high precision voltage amplitude and frequency is supply to outdoor load, and the UPS state is maintained.

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Xiangli, Li, and Qi Hanhong. "One-Cycle Controlled Single Phase UPS Inverter." Physics Procedia 25 (2012): 1048–54. http://dx.doi.org/10.1016/j.phpro.2012.03.198.

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Sandjojo, Ferry Aditya, Iwan Setiawan, and Trias Andromeda. "IMPLEMENTASI KONTROL ARUS PADA INVERTER SATU FASA MENGGUNAKAN DSPIC30F4011 DENGAN METODE KONTROL HYSTERESIS." TRANSIENT 7, no. 1 (August 15, 2018): 327. http://dx.doi.org/10.14710/transient.7.1.327-333.

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Inverter merupakan perangkat yang umum digunakan sebagai konverter untuk mengubah tegangan DC ke AC. Aplikasi inverter yang sering dijumpai adalah pada sistem photovolaic yang tersambung dengan grid dimana kualitas arus keluaran inverter sangat berpengaruh terhadap kualitas daya, serta pada UPS dengan daya rendah hingga menengah dimana arus keluaran inverter harus dikontrol untuk meningkatkan performa UPS. Dibandingkan dengan inverter PWM open loop, inverter dengan kontrol arus memiliki beberapa keunggulan diantaranya respon sistem yang lebih cepat dan memiliki akurasi tinggi dalam pengontrolan. Salah satu metode yang umum digunakan untuk mengontrol arus keluaran inverter adalah kontroler arus histeresis, dimana arus keluaran inverter dan referensi yang diberikan dibandingkan dalam batas histeresis tertentu. Metode kontrol ini banyak digunakan karena sederhana, respon sistem yang cepat dan robust terhadap perubahan beban. Dalam penelitian ini, dirancang inverter satu fasa Full Bridge dengan metode kontrol arus histeresis menggunakan mikrokontroler 16-bit DSPIC30F4011. Arus keluaran inverter diumpan-balikkan oleh sensor arus ACS712-05B. Pengujian dilakukan dengan rentang referensi arus sebesar 1 – 3 A pada variasi beban 4,6Ω dan 9,4Ω. Hasil pengujian menunjukkan gelombang arus keluaran inverter mampu mengikuti referensi arus yang diberikan. Rata-rata error pada arus keluaran inverter adalah 0,55 A untuk beban 4,6Ω dan 0,06 A untuk beban 9,4Ω.

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Shahparasti, Mahdi, Mehdi Savaghebi, Majid Hosseinpour, and Navid Rasekh. "Enhanced Circular Chain Control for Parallel Operation of Inverters in UPS Systems." Sustainability 12, no. 19 (September 30, 2020): 8062. http://dx.doi.org/10.3390/su12198062.

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In this paper, a current sharing method based on the circular chain control (3C) method is proposed for controlling parallel inverters of unequal ratings in uninterruptible power supply (UPS) applications. Due to its circular structure, 3C is one of the most convenient methods which can be used in UPS as well as microgrid systems. However, the conventional 3C control strategy is only applicable to inverters of equal power ratings. The proposed method not only retains the circular structure of the 3C method, but also provides adaptability for the parallel operation of inverters with different power ratings. Moreover, this method adds hot-swap capability to the parallel inverter. A two-loop control structure is used to control the inverters. For proper current sharing, currents of inverters are conveyed in a circular structure with appropriate gains through control links. Simulation and experimental results for linear and nonlinear loads verify the effectiveness of the proposed strategy.

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Ku, Dae-Kwan, Jun-Keun Ji, Guee-Soo Cha, and Jun-Hee Moon. "Design of Robust Voltage Controller for Single-phase UPS Inverter." Transactions of the Korean Institute of Power Electronics 16, no. 4 (August 20, 2011): 317–25. http://dx.doi.org/10.6113/tkpe.2011.16.4.317.

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Mehta, Shivinder, Farhad Ilahi Bakhsh, and Neetan Neetan Sharma. "Efficient Energy Management and Grid Interconnection of Solar PV System." International Journal of Engineering & Technology 7, no. 3.12 (July 20, 2018): 1273. http://dx.doi.org/10.14419/ijet.v7i3.12.17869.

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With the increasing concerns on environment and increasing emission of greenhouse gases, we need to reduce the energy required to provide necessary products and services essential for ease of living by implementing efficient use of energy. Also we need to shift towards more clean and green forms of energy. Sun is the ultimate source of energy and its energy reaching at Earth's surface is about 10000 times greater than what we are consuming presently. Solar and wind remains in the top list of clean and green energy.Solar energy harnessed by Multifunctional photovoltaic converters (MPVC) are getting popular now a day as, it combines the advantages of inverters connected to the network (grid-tie inverter) and off-grid type inverter, as well as Uninterruptable Power Supplies (UPS). Grid tie inverter simply feeds the excess power generated to the grid with full utilization of solar panels.

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He, Guofeng, Le Zhao, Yanfei Dong, Guojiao Li, and Wenjie Zhang. "A Novel VSG Control Strategy for UPS Voltage Source Inverter with Impulsive Load." Energies 15, no. 13 (June 27, 2022): 4702. http://dx.doi.org/10.3390/en15134702.

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This paper proposes a novel control strategy to alleviate the impulsive current for Uninterruptible Power Supply (UPS), which is designed based on the theory of virtual synchronous generator (VSG) and dynamic switching method. The power quality of UPS will become distortion when the instantaneous impulsive load is imposed on UPS. Especially, the output current of UPS will increase quickly in short time. In order to maintain the uninterrupted output voltage and reduce the distortion of output voltage of UPS under the action of instantaneous impulse load, Dynamic switching method is proposed to resist impulse load with large scale impulse current, Meanwhile, the VSG control strategy is adopted to deal with the slow power switching and provide virtual inertia for the system, so that the output voltage of UPS can remain uninterrupted and stable. Finally, simulation and experimental results show that this method can effectively suppress the impulse current, reduce the output voltage distortion of UPS inverter, and ensure the good performance of On-line UPS under impulse load.

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Uthirasamy, R., and U. S. Ragupathy. "Design and Experimentation of Boost Cascaded DC Link Inverter for Domestic UPS Applications." Journal of Circuits, Systems and Computers 24, no. 10 (October 25, 2015): 1550156. http://dx.doi.org/10.1142/s021812661550156x.

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A new structure of Boost Cascaded DC Link H-Bridge Inverter (BCDCLHBI) is proposed for domestic UPS applications. It consists of DC-DC converter, sub-multilevel modules and H-bridge inverter circuits. The proposed sub-multilevel modules synthesize a stepped DC link voltage with reduced voltage stress across the H-bridge inverter. Compared with conventional two-level inverter the proposed stepped DC link inverter configuration has reduced Power Spectral Density (PSD) and reduced voltage stress. Compared with conventional Cascaded Multilevel Inverter (CMLI) configuration, the proposed system has reduced power switches, DC sources and gate driver requirements. To obtain better quality of AC power output, carrier-level shifted Pulse Width Modulation (PWM) schemes are developed for sub-multilevel switching. A simulation and prototype model of 7-level BCDCLHBI is developed and its performance is validated.

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Li, Xiaoqian, Guichen Zhang, and Qi Zhang. "Research on Optimization Simulation of Three-level Inverter in UPS Based on PSO Algorithm." Journal of Physics: Conference Series 2290, no. 1 (June 1, 2022): 012021. http://dx.doi.org/10.1088/1742-6596/2290/1/012021.

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Abstract As a kind of precision power equipment, the uninterruptible power supply system (UPS) can supply power to the load through a DC-AC converter to ensure the uninterrupted power supply in case of grid failure. The voltage waveform output by the inverter has a decisive effect on the power quality, performance of the UPS system is determined by the power quality. Therefore, this paper aims to optimize the output power of the inverter from two aspects: on the one hand, the three-level space vector pulse-width modulation (SVPWM) technology is combined with the double closed-loop control system to improve the voltage waveform of the inverter; On the other hand, the PI parameters in the double closed loop are optimized by the particle swarm optimization (PSO) algorithm, the dynamic performance of the system is optimized, the adjustment time and overshoot are reduced, thus the control performance of the UPS system is improved.

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Lubis, Rakhmad Syafutra, Abdul Haris, and Tarmizi Tarmizi. "UPS Design for Increased Flexibility of Use and More Economic with PWM Controlled Inverter Based on ATmega 328 Microcontroller." TEKNIK 43, no. 1 (April 11, 2022): 102–11. http://dx.doi.org/10.14710/teknik.v43i1.32736.

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As the high electrical load increases, power outages can occur suddenly while using electronics and often will cause damage to both software and hardware from the electronic load. To solve this problem, can use an UPS. but UPS also still has weaknesses that become the basis for consideration of its use not yet widespread, such as the price is still expensive and the backup time is short, Therefore, the design of a single-phase ac power supply with a PWM Inverter controller based on the Atmega 328 Microcontroller was carried out to increase the flexibility of the UPS using a current flow pattern according to a bidirectional ac power supply and simplified in this study to make it more economical with fewer diodes and MOSFETs. Total harmonic distortion (THD) voltage is 5.24%, output frequency is 49.56 Hz, output voltage and voltage drop meet the standard with the UPS device consisting of a transformer, adapter and inverter with adjustable switching frequency and filters.

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Al Rakib, Md Abdullah, Md Moklesur Rahman, Md Shamsul Alam Anik, Fayez Ahmed Jahangir Masud, Sanjib Islam, Md Ashiqur Rahman, Shantanu Chakraborty, and Fysol Ibna Abbas. "Arduino Based Efficient Energy Storage Systems Using Solar and Wind Power." European Journal of Engineering and Technology Research 7, no. 2 (April 15, 2022): 134–39. http://dx.doi.org/10.24018/ejeng.2022.7.2.2743.

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The aim of this work to investigate and create a solar-powered UPS for the Bangladeshi market as an alternative energy source. It comprises of a design that was created based on our study. Solar and wind UPS systems are made up of a solar charge controller with inverter circuit, and solar panel. Many circuit simulations were performed during this procedure to meet the work’s requirement. It also demonstrates that solar and wind-powered UPSs will be very effective and profitable in the electrical UPS industry. In this project, the solar panel is made up of solar cells that convert solar energy into electrical energy. We also have a charging circuit that charges a 12V DC (direct current) battery and an inverter circuit that converts the voltage to AC (alternative current).

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Masri, Mahrizal, R. Badlisha, Muhamad Irwanto, N. Gomesh, Y. M. Irwan, F. Malek, Hermansyah Alam, and M. R. Mamat. "Effect of Maximum Voltage Angle on Inverter Performance Applied in Uninterrupted Power Supply (UPS)." Applied Mechanics and Materials 793 (September 2015): 304–8. http://dx.doi.org/10.4028/www.scientific.net/amm.793.304.

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Uninterrupted power supply (UPS) sits between a power supply such as wall outlet and devices to prevent undesired feature that can occur within the power source such as outages, sags, surges and bad harmonics from the supply to avoid a negative impact on the devices. This paper presents a photovoltaic (PV) powered UPS using microcontroller PIC16F628A-I/P. It is a standby UPS whereas if the main power source fails to supply power to loads, a battery powered inverter turns on to continue supplying power. The battery is charged by the PV using solar charger and transfer switch controlled by the microcontroller. In this research, AC three-level waveform single phase inverter was developed and created by a microcontroller PIC16F627A-I/P with varied maximum voltage angle from 200 to 1800 and tested to a load of 240 V, 20 W AC aquarium water pump, and also analyzed effect of maximum voltage angle on the three-level single phase inverter performance. The result showed that maximum voltage angles of the inverter effected on root mean square value of AC voltage, current and power. If the maximum voltage angle was increased, therefore value of the AC voltage, current and power would increase. The maximum voltage angle would effect on the current total harmonic distortion (CTHD), the lowest CTHD of 15.448% was obtained when the maximum voltage angle was 1340.

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Krachangchaeng, Napat, and Sakorn Po-Ngam. "The Three-Level Sine-Wave Inverter with Power Factor Correction (PFC)." Applied Mechanics and Materials 781 (August 2015): 402–5. http://dx.doi.org/10.4028/www.scientific.net/amm.781.402.

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Nowadays, the uninterruptible power supply (UPS) is important in reliability for electric device. The UPS need high quality electricity. Therefore, the simulation of the three-level sine-wave inverter with power factor correction (PFC) is proposed in this paper. Moreover, the circuit’s guidelines of the active PFC controller in the active PFC and the sinusoidal output voltage are also presented. Validity of the proposed the three-level sine-wave inverter with the active PFC is confirmed by simulation. The simulation results show the very small current harmonics, the input power factor most nearly unity and constant output voltage when the suddenly step-load changed.

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Salam, Z., S. M. Ayob, and L. S. Toh. "A Compact High-Frequency Link Inverter for UPS Application." International Journal on Engineering Applications (IREA) 2, no. 2 (March 31, 2014): 64. http://dx.doi.org/10.15866/irea.v2i2.1401.

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Holtz, J., and K. H. Werner. "Multi-inverter UPS system with redundant load sharing control." IEEE Transactions on Industrial Electronics 37, no. 6 (1990): 506–13. http://dx.doi.org/10.1109/41.103455.

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Abdel-Rahim, N., and J. E. Quaicoe. "A single-phase delta-modulated inverter for UPS applications." IEEE Transactions on Industrial Electronics 40, no. 3 (June 1993): 347–54. http://dx.doi.org/10.1109/41.232214.

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Chung, Y. H., B. S. Shin, and G. H. Cho. "Bilateral series resonant inverter for high frequency link UPS." IEE Proceedings B Electric Power Applications 138, no. 4 (1991): 159. http://dx.doi.org/10.1049/ip-b.1991.0020.

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Kai Zhang, Yong Kang, Jian Xiong, and Jian Chen. "Direct repetitive control of SPWM inverter for UPS purpose." IEEE Transactions on Power Electronics 18, no. 3 (May 2003): 784–92. http://dx.doi.org/10.1109/tpel.2003.810846.

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Umemura, Atsushi, and Toshimasa Haneyoshi. "Optimal Designed LC filter of PWM Inverter for UPS." Journal of the Japan Institute of Power Electronics 37 (2012): 196–202. http://dx.doi.org/10.5416/jipe.37.196.

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Dong-Eok Kim and Dong-Choon Lee. "Feedback Linearization Control of Three-Phase UPS Inverter Systems." IEEE Transactions on Industrial Electronics 57, no. 3 (March 2010): 963–68. http://dx.doi.org/10.1109/tie.2009.2038404.

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Vairavasundaram, Indragandhi, Vijayakumar Varadarajan, Pitta Janakiram Pavankumar, Ramesh Kumar Kanagavel, Logesh Ravi, and Subramaniyaswamy Vairavasundaram. "A Review on Small Power Rating PV Inverter Topologies and Smart PV Inverters." Electronics 10, no. 11 (May 29, 2021): 1296. http://dx.doi.org/10.3390/electronics10111296.

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The two most critical deciding factors for power consumption are energy efficiency and cost. Power electronic circuits are widely used and play an important role in achieving high efficiency in power distribution to customers and power transfer from source to load. Furthermore, solar energy is abundant, sustainable, and pollution-free in nature. Power electronic circuits are used in high-power applications with voltages ranging from a few millivolts to thousands of volts and wattages ranging from a few mW to megawatts. This paper examines a variety of inverter topologies and their modeling, as well as a comparison of single-stage and multi-stage/inverter topologies depending on the application. The main aim of control techniques is to keep Total Harmonic Distortion (THD) to a minimum and the switching frequency within the permissible range so that inverters for renewable energy sources, electric vehicles, uninterruptible power supply (UPS) systems, and hybrid energy storage systems can work efficiently. Plug-and-play, adaptability, self-awareness, and other features should all be included in a smart inverter. Based on the findings of this comparative analysis, selection criteria are established. This comparative analysis can be used to develop selection criteria for choosing inverter circuits for the various applications described in this paper.

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Sharga, Miss Rashi. "Outline and Testing of Portable Solar Inverter." International Journal for Research in Applied Science and Engineering Technology 9, no. 10 (October 31, 2021): 1699–704. http://dx.doi.org/10.22214/ijraset.2021.38677.

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Abstract: In this study we talk about ,a simulacrum of one phase inverter using solar energy, The main aim is use of solar energy for electricity to study about Portable inverter, to use solar energy for electricity . Inverter circuits consists of Ups , battery module and battery charger. The main work of Inverter is to convert D.C voltage to A.C voltage .Inverter circuit are divided into 3 parts Bjt switch ,control circuit which is use for generate pluses thorough micro controller ,filter part consists of capacitor, Resistor which is use to overcome of harmonics. The main purpose of this work, to be simple such as for as assessing knowledge about solar movable inverter with minimum cost and uses. Keywords: Solar panel, Regulator, battery charger, Inverter circuit, switching device, Transformer.

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Dai, Xue Mei, and Yu Fu. "Suggestions in Ensuring the Safety of UPS Power Supply." Advanced Materials Research 461 (February 2012): 772–74. http://dx.doi.org/10.4028/www.scientific.net/amr.461.772.

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UPS (Uninterruptible Power System) is an energy storage device, and it is also a uninterruptible power supply which contains the inverter as the main component and works at the constant voltage constant frequency. it is playing an increasingly important role. Some suggestions are mainly proposed to ensure the safety of UPS power supply system in this paper, which make the UPS power supply system really play the role of escort in the practical application.

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Kwon, Jung-Min. "Composite Energy Storage System with Photovoltaic Power Generation and Uninterruptible Power Supply Function." International Journal of Photoenergy 2013 (2013): 1–9. http://dx.doi.org/10.1155/2013/830341.

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A composite energy storage system (CESS) that includes a photovoltaic (PV) power generation and an uninterruptible power supply (UPS) function is proposed. This system has three operating modes, namely, a grid-connected inverter mode, a grid-connected rectifier mode, and an islanding mode. This system is composed of a boost converter, a three-phase inverter/rectifier, a bidirectional DC/DC converter, and thyristor switches. The boost converter extracts maximum power from the PV panels and sends it to the DC-link. The bidirectional DC/DC converter is connected between the battery and the DC-link, which leads to an optimized charging/discharging operation. The three-phase inverter/rectifier transmits the power to and from the grid. Also, it operates as a UPS in the islanding mode. The thyristor switches are used for connecting/disconnecting between the grid and the AC load. A 15 kW prototype is implemented to verify the performance of the proposed system.

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Oliveira, Tiago, Luís Caseiro, André Mendes, Sérgio Cruz, and Marina Perdigão. "Model Predictive Control for Paralleled Uninterruptible Power Supplies with an Additional Inverter Leg for Load-Side Neutral Connection." Energies 14, no. 8 (April 18, 2021): 2270. http://dx.doi.org/10.3390/en14082270.

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Uninterruptible Power Supplies (UPS) have been demonstrated to be the key technology in feeding either single- and three-phase loads in a wide range of critical applications, such as high-tier datacenters and medical facilities. To increase the overall system power capacity and resilience, UPS systems are usually connected in parallel. When UPS systems are parallel connected, a circulating current can rise, inhibiting correct system operation. Moreover, having a controlled load power distribution is another fundamental requirement in paralleled UPS systems. However, strategies to ensure these two topics have not been explored to date for UPS systems with a load-side neutral connection. This paper proposes an innovative Finite Control Set Model Predictive Control (FCS-MPC) strategy that ensures circulating current elimination and controlled load power distribution for paralleled UPS systems that use an additional inverter leg for load neutral point connection. Additionally, a system topology based on two parallel-connected UPS systems that can simultaneously supply single- and three-phase critical loads is proposed. Experimental results show the effectiveness and robustness of the proposed control techniques even when different types of loads are connected to the UPS systems.

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Ferdiansyah, Indra, Indhana Sudiharto, Epyk Sunarno, and Mahbub Gusti Muhammad. "DESAIN SPWM SINGLE PHASE FULL BRIDGE INVERTER PADA SISTEM UNINTERRUPTIBLE POWER SUPPLY 500W." Jurnal Arus Elektro Indonesia 7, no. 1 (May 23, 2021): 10. http://dx.doi.org/10.19184/jaei.v7i1.23438.

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Indonesia has sufficient power resources provided by PLN. However, blackouts still occur frequently due to several reasons, such as disruption in transmission and distribution, especially when the weather is raining. This has an impact on customer inconvenience. To overcome this, several houses have used a backup power source in the form of a generator set that will be operated by a blackout. This solution turns out to cause noise that can interfere with user comfort. To increase user convenience, a system (Uninterruptible Power Supply) is proposed. The system there is a voltage sensor to detect a power outage. In addition, there is an SSR switch so that it can to switch main source to the UPS with a fast response time during a blackout. The inverter on UPS system uses the SPWM technique to produce a sine wave output, then the use of an LC filter to reduce ripple on the system. PID-based voltage control is used to maintain the output inverter by the setting value of magnitude amplitude. Based on the results of the test, the UPS can work during a blackout with a maximum power of 500W and the voltage constant at 215V. Keywords — Blackout, PI Controller , SPWM, UPS.

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HILLOOWALA, R. M., and S. M. SRIRAGHAVAN. "Selection and design of inverter output filters for UPS systems." International Journal of Electronics 61, no. 3 (September 1986): 371–85. http://dx.doi.org/10.1080/00207218608920879.

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Widodo, Widodo, Tole Sutikno, and Siswanto Siswanto. "PERANCANGAN SISTEM UPS SPS DENGAN METODE INVERTER SPWM BERBASIS L8038CCPD." TELKOMNIKA (Telecommunication Computing Electronics and Control) 3, no. 2 (August 1, 2005): 79. http://dx.doi.org/10.12928/telkomnika.v3i2.1221.

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Tsang-Li Tai and Jian-Shiang Chen. "UPS inverter design using discrete-time sliding-mode control scheme." IEEE Transactions on Industrial Electronics 49, no. 1 (2002): 67–75. http://dx.doi.org/10.1109/41.982250.

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Atmojo, Kusumo Tri, Mochammad Facta, and Tejo Sukmadi. "INVERTER FULL BRIDGE SATU FASA BERBASIS IC SG3524." TRANSIENT 6, no. 3 (November 9, 2017): 467. http://dx.doi.org/10.14710/transient.6.3.467-475.

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Inverter merupakan sebuah konverter yang mengubah sebuah masukan arus searah menjadi arus bolak-balik. Dalam beberapa bentuk inverter tegangan keluaran arus bolak balik tersebut dapat dikendalikan besar magnitud dan frekuensinya. Penggunaan inverter dapat berupa catu daya untuk pengaturan kecepatan motor ac, uninterruptible power supplies (UPS) dan alat konversi tenaga listrik dari baterai. Pada penelitian ini, inverter yang dirancang menggunakan topologi full bridge. Topologi ini memiliki keunggulan berupa magnitud tegangan keluaran maksimum yang sama dengan tegangan magnitud tegangan arus searah yang menjadi tegangan masukannya. Dengan tegangan masukan yang sama, topologi full bridge memiliki daya yang lebih besar dibandingkan inverter topologi lainnya. IC SG3524 digunakan sebagai pembangkit sinyal PWM (Pulse Width Modulation). Inverter full bridge dalam penelitian ini dirancang untuk dapat divariasikan besar frekuensi dan duty cyclenya. Frekuensi dari inverter dirancang untuk beroperasi dalam rentang 19 Hz – 65 Hz dan duty cycle 11 % - 44 %. Berdasarkan hasil pengujian Inverter full bridge menghasilkan gelombang kotak keluaran arus bolak balik. Efisiensi inverter full bridge mencapai nilai terendah sebesar 81,56% dan nilai tertinggi sebesar 99,53% ketika dibebani lampu pijar dengan daya 40, 60, dan 100 W. Efisiensi inverter ketika dibebani motor induksi mencapai nilai 86,55 % sebagai nilai efisiensi terendah dan 98,35% sebagai nilai efisiensi tertinggi.

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Lim, Seung-Beom, Yun-Ha Lee, Hyung-Soo Mok, and Jun-Keun Ji. "Development of the Inverter System with UPS Function for the Air-Conditioning Blower." Transactions of the Korean Institute of Power Electronics 16, no. 3 (June 20, 2011): 302–8. http://dx.doi.org/10.6113/tkpe.2011.16.3.302.

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Aqeel Anwar, Muhammad, Ghulam Abbas, Irfan Khan, Ahmed Bilal Awan, Umar Farooq, and Saad Saleem Khan. "An Impedance Network-Based Three Level Quasi Neutral Point Clamped Inverter with High Voltage Gain." Energies 13, no. 5 (March 9, 2020): 1261. http://dx.doi.org/10.3390/en13051261.

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Due to the impediments of voltage source inverter and current source inverter, Z-Source Inverter (ZSI) has become notorious for better power quality in low and medium power applications. Several modifications are proposed for impedance source in the form of Quasi Z-Source Inverter (QZSI) and Neutral Point Clamped Z-Source Inverter (NPCZSI). However, due to the discontinuity of the source current, NPCZSI is not suitable for some applications, i.e., fuel cell, UPS, and hybrid electric vehicles. Although in later advancements, source current becomes continuous in multilevel QZSI, low voltage gain, higher shoot-through duty ratio, lesser availability of modulation index, and higher voltage stress across switches are still an obstacle in NPCZSI. In this research work, a three-level high voltage gain Neutral Point Clamped Inverter (NPCI) that gives three-level AC output in a single stage, is proposed to boost up the DC voltage at the desired level. At the same time, it detains all the merits of previous topologies of three-level NPCZSI/QZSI. Simulations have been done in the MATLAB/Simulink environment to show the effectiveness of the proposed inverter topology.

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Masukawa, Shigeo, Yasutomo Moriura, Shoji Iida, and Shota Miyairi. "A method to apply current source inverter to single-phase UPS." IEEJ Transactions on Industry Applications 110, no. 5 (1990): 457–66. http://dx.doi.org/10.1541/ieejias.110.457.

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Radhika, A., P. Maruthupandi, J. Karthika, and R. Geethamani. "A New Improved Trans Z Source Inverter based Three Phase UPS." Indian Journal of Science and Technology 12, no. 19 (May 1, 2019): 1–10. http://dx.doi.org/10.17485/ijst/2019/v12i19/144468.

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Zhao, Ke, Juan Hu, Ying Xiang, and Hong Feng Deng. "Research of UPS Inverter Based on Repetitive Control and Deadbeat Control." Applied Mechanics and Materials 310 (February 2013): 486–89. http://dx.doi.org/10.4028/www.scientific.net/amm.310.486.

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A composite control strategy is proposed based on the repetitive control and deadbeat control in the ups inverter control system, according to the features of the non-static error track of repetitive control and the deadbeat control’s fast response and high precision control. Repetitive control can be very good to eliminate periodic disturbance, and deadbeat control to reduce the overshoot and oscillation, when the system is subject to greater disturbance, that can improve the dynamic performance of the system. Simulation results show that it has a fast transient response, high accuracy, THD and other small features.

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Xiao Sun, M. H. L. Chow, F. H. F. Leung, Dehong Xu, Yousheng Wang, and Yim-Shu Lee. "Analogue implementation of a neural network controller for UPS inverter applications." IEEE Transactions on Power Electronics 17, no. 3 (May 2002): 305–13. http://dx.doi.org/10.1109/tpel.2002.1004238.

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Aamir, Muhammad, Kafeel Ahmed Kalwar, and Saad Mekhilef. "Proportional-Resonant and Slide Mode Control for Single-Phase UPS Inverter." Electric Power Components and Systems 45, no. 1 (November 29, 2016): 11–21. http://dx.doi.org/10.1080/15325008.2016.1233301.

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Kim, Seon-Tae, and Jun-Keun Ji. "Wireless Parallel Operation of a Three-phase Modular UPS Inverter using Resistive Droop Control." Transactions of The Korean Institute of Electrical Engineers 65, no. 10 (October 1, 2016): 1672–81. http://dx.doi.org/10.5370/kiee.2016.65.10.1672.

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Journal articles on the topic 'UPS inverter'

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