Log in

Relevant bibliographies by topics / Impedance convertor / Journal articles

To see the other types of publications on this topic, follow the link: Impedance convertor.

Journal articles on the topic 'Impedance convertor'

Author: Grafiati

Published: 28 June 2021

Last updated: 29 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Impedance convertor.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Fabre, A., and O. Saaid. "Novel translinear impedance convertor and bandpass filter applications." Electronics Letters 29, no. 9 (1993): 746. http://dx.doi.org/10.1049/el:19930500.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Miguel, J. M. "New positive-impedance convertor suitable for high-frequency application." Electronics Letters 21, no. 9 (1985): 402. http://dx.doi.org/10.1049/el:19850286.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Liang, Zhiming, Bin Li, Zhaohui Wu, and Yunfeng Hu. "A high input impedance chopper amplifier using negative impedance convertor for implantable EEG recording." IEICE Electronics Express 17, no. 17 (2020): 20200238. http://dx.doi.org/10.1587/elex.17.20200238.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Takagi, S., and N. Fujii. "Novel highly linear MOS integrator using a negative impedance convertor (NIC)." Electronics Letters 30, no. 10 (1994): 746–48. http://dx.doi.org/10.1049/el:19940547.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Zhang, Song, Guoqing Li, Shuguang Li, and Xintong Liu. "A Method of Demarcating Critical Failure Impedance Boundary of Multi-Infeed HVDC Systems Based on Minimum Extinction Angle." Mathematical Problems in Engineering 2021 (August 31, 2021): 1–14. http://dx.doi.org/10.1155/2021/9923737.

Full text

Abstract:

A method of rapidly demarcating the critical commutation failure (CF) region of a multi-infeed high-voltage direct-current (HVDC) system is proposed. Based on the nodal impedance matrix and nodal voltage interaction factor, for different AC fault conditions—both balanced and unbalanced—a method of calculating the extinction angles of converters in multi-infeed HVDC systems is deduced in detail. First, the extinction angles of convertor stations under single-phase, double-phase, and three-phase ground faults and line-to-line faults occurring at any bus in an AC system are calculated. The minimu

APA, Harvard, Vancouver, ISO, and other styles

6

Watanabe, Tomoki, Noriko Fukuda, and Satoru Hatsukade. "Control of a PWM Convertor for Linear Generator as a Variable Impedance." IEEJ Transactions on Industry Applications 120, no. 2 (2000): 288–96. http://dx.doi.org/10.1541/ieejias.120.288.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Li, Wenxing, Ning Zhai, Ruilong Chen, and Wenhua Yu. "Non-Foster Impedance Wideband Matching Technique for Electrically Small Active Antenna." International Journal of Antennas and Propagation 2013 (2013): 1–7. http://dx.doi.org/10.1155/2013/531419.

Full text

Abstract:

This paper investigates a non-Foster wideband circuit matching technique for an electrically small antenna (ESA). By introducing a negative impedance convertor into an active network, the active network can obtain an equivalent input gain at input port to improve gain, sensitivity and output ratio of signal to noise. In addition, it also increases the effective height of active antenna. The experimental results have verified the proposed method by using a 100 KHz–30 MHz wideband active receiving monopole antenna.

APA, Harvard, Vancouver, ISO, and other styles

8

Lahiri, A. "DO-CCII Based Generalised Impedance Convertor Simulates Floating Inductance, Capacitance Multiplier and Fdnr." Australian Journal of Electrical and Electronics Engineering 7, no. 1 (2010): 15–20. http://dx.doi.org/10.1080/1448837x.2010.11464253.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Ding, Yuan, and Vincent Fusco. "Loading artificial magnetic conductor and artificial magnetic conductor absorber with negative impedance convertor elements." Microwave and Optical Technology Letters 54, no. 9 (2012): 2111–14. http://dx.doi.org/10.1002/mop.27019.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Hu, Pengfei, Li Shen, Feng Han, et al. "Development of the data acquisition system for terahertz spectrometer." Transactions of the Institute of Measurement and Control 40, no. 3 (2017): 805–11. http://dx.doi.org/10.1177/0142331217690475.

Full text

Abstract:

In most Terahertz time-domain spectrometer (THz-TDS) experiments, the lock-in amplifier works with trans-impedance pre-amplifier to amplitude the terahertz pulse accepted from detector. This paper discusses the development of data acquisition system for the transmission THz-TDS. In this system, the cross-correlation software algorithm in SR830 lock-in amplifier from Stanford Research Systems, that is usually used in THz-TDS, has been replaced by parallel hardware algorithm of Field Programmable Gate Array (FPGA) chip with the parallel processing ability. This chip has a faster processing speed

APA, Harvard, Vancouver, ISO, and other styles

11

Fan, Bishuang, Haihang Ma, Wen Wang, et al. "Active arc suppression device based on voltage‐source convertor with consideration of line impedance in distribution networks." IET Power Electronics 14, no. 16 (2021): 2585–96. http://dx.doi.org/10.1049/pel2.12203.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Loku, Fisnik, Patrick Düllmann, Christina Brantl, and Antonello Monti. "Equivalent Impedance Calculation Method for Control Stability Assessment in HVDC Grids." Energies 14, no. 21 (2021): 6899. http://dx.doi.org/10.3390/en14216899.

Full text

Abstract:

A major challenge in the development of multi-vendor HVDC networks are converter control interactions. While recent publications have reported interoperability issues such as persistent oscillations for first multi-vendor HVDC setups with AC-side coupling, multi-terminal HVDC networks are expected to face similar challenges. To investigate DC-side control interactions and mitigate possible interoperability issues, several methods based on the converters’ and DC network’s impedances have been proposed in literature. For DC network’s impedance modelling, most methods require detailed knowledge o

APA, Harvard, Vancouver, ISO, and other styles

13

SRIDHARAN, HARIKA, SEYEZHAI RAMALINGAM, and JAWAHAR ARUMUGAM. "WIDE BOOST RATIO IN QUASI-IMPEDANCE NETWORK CONVERTER USING SWITCH VOLTAGE SPIKE REDUCTION TECHNIQUE." REVUE ROUMAINE DES SCIENCES TECHNIQUES — SÉRIE ÉLECTROTECHNIQUE ET ÉNERGÉTIQUE 68, no. 3 (2023): 259–65. http://dx.doi.org/10.59277/rrst-ee.2023.3.2.

Full text

Abstract:

High-step-up converters are widely used for solar power applications. In that, impedance source converters are mostly preferred as it has a special feature of high gain at a low-duty cycle. However, the traditional impedance source converters have limited duty ratio operation and high stress across the network and the device. Thus, this paper presents a new type of quasi-impedance source dc-dc converter. The proposed converter has a large boost ratio operation using a switch voltage spike reduction technique. This reduces the stress across the network as well as across the device. The performa

APA, Harvard, Vancouver, ISO, and other styles

14

Pidaparthy, Syam Kumar, and Byungcho Choi. "Control Design and Loop Gain Analysis of DC-to-DC Converters Intended for General Load Subsystems." Mathematical Problems in Engineering 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/426315.

Full text

Abstract:

DC-to-DC converters are usually intended for general applications where the load impedance characteristics are unknown or undefined. This paper establishes the control design procedures for DC-to-DC converters in the absence of any prior knowledge on their load impedance. The proposed control design can be universally adapted to all the DC-to-DC converters regardless of the impedance characteristics of their actual load. This paper also presents the loop gain analysis of the converter combined with an actual load whose impedance characteristics are only available afterward. A graphical analysi

APA, Harvard, Vancouver, ISO, and other styles

15

Quester, Matthias, Fisnik Loku, Otmane El Azzati, Leonel Noris, Yongtao Yang, and Albert Moser. "Investigating the Converter-Driven Stability of an Offshore HVDC System." Energies 14, no. 8 (2021): 2341. http://dx.doi.org/10.3390/en14082341.

Full text

Abstract:

Offshore wind farms are increasingly built in the North Sea and the number of HVDC systems transmitting the wind power to shore increases as well. To connect offshore wind farms to adjacent AC transmission systems, onshore and offshore modular multilevel converters transform the transmitted power from AC to DC and vice versa. Additionally, modern wind farms mainly use wind turbines connected to the offshore point of common coupling via voltage source converters. However, converters and their control systems can cause unwanted interactions, referred to as converter-driven stability problems. Th

APA, Harvard, Vancouver, ISO, and other styles

16

Luhtala, Roni, Tuomas Messo, Tomi Roinila, et al. "Identification of Three-Phase Grid Impedance in the Presence of Parallel Converters." Energies 12, no. 14 (2019): 2674. http://dx.doi.org/10.3390/en12142674.

Full text

Abstract:

Grid impedance is an important parameter which affects the control performance of grid-connected power converters. Several methods already exist for optimizing the converter control system based on knowledge of grid impedance value. Grid impedance may change rapidly due to fault or disconnection of a transmission line. Therefore, online grid identification methods have been recently proposed to have up-to-date information about the grid impedance value. This is usually done by perturbing the converter output current and measuring the response in output voltage. However, any parallel converters

APA, Harvard, Vancouver, ISO, and other styles

17

Shyu, Kuo-Kai, Yi-Chang Yu, Xin-Lan Lin, Lung-Hao Lee, and Po-Lei Lee. "A Novel Bidirectional-Switched-Capacitor-Based Interlaced DC-DC Converter." Electronics 12, no. 4 (2023): 792. http://dx.doi.org/10.3390/electronics12040792.

Full text

Abstract:

This study proposes a novel bidirectional-switched-capacitor-based interleaved converter. In view of the shortcomings of the two well-known unidirectional-switched-capacitor-based interleaved converters, this study improves such converters through combining the novel structure of a switched capacitor circuit. The first effort was to overcome the drawback of the Cockcroft–Walton-based interleaved converter, whose circuit impedance and ripple cause a serious output voltage drop. The second was to solve the Dickson-based interleaved converter with its capacitors subjected to high-voltage stress.

APA, Harvard, Vancouver, ISO, and other styles

18

Li, Yuye, Kaipei Liu, Xiaobing Liao, Shu Zhu, and Qing Huai. "A Virtual Impedance Control Strategy for Improving the Stability and Dynamic Performance of VSC–HVDC Operation in Bidirectional Power Flow Mode." Applied Sciences 9, no. 15 (2019): 3184. http://dx.doi.org/10.3390/app9153184.

Full text

Abstract:

It is a common practice that one converter controls DC voltage and the other controls power in two-terminal voltage source converter (VSC)–based high voltage DC (HVDC) systems for AC gird interconnection. The maximum transmission power from a DC-voltage-controlled converter to a power-controlled converter is less than that of the opposite transmission direction. In order to increase the transmission power from a DC-voltage-controlled converter to a power-controlled converter, an improved virtual impedance control strategy is proposed in this paper. Based on the proposed control strategy, the D

APA, Harvard, Vancouver, ISO, and other styles

19

Hu, Xuekai, Zifan Li, Cunyue Pan, Hao Li, and Yingyu Liang. "An Adaptive Virtual-Impedance-Based Current-Limiting Method with the Functionality of Transient Stability Enhancement for Grid-Forming Converter." Electronics 13, no. 14 (2024): 2750. http://dx.doi.org/10.3390/electronics13142750.

Full text

Abstract:

Grid-forming (GFM) converters are regarded as the most promising solution for grid-connected converters of renewable energy due to their robustness against weak grids. However, attributable to their voltage source characteristics, GFM converters may experience overcurrent issues during large disturbances. The virtual impedance (VI) method is an effective method to solve this problem. Nevertheless, there exists a contradiction between the demands for VI posed by current limitations and transient stability. Firstly, the analytical equations of virtual impedance for limiting the fault steady-stat

APA, Harvard, Vancouver, ISO, and other styles

20

Li, Feng, Zhijie Li, Shuangmian Yang, Jinyu Wang, and Yibo Zhang. "Stability analysis of small signals under different ratios of grid-following to grid-forming converters sent via flexible DC delivery." Journal of Physics: Conference Series 2896, no. 1 (2024): 012028. https://doi.org/10.1088/1742-6596/2896/1/012028.

Full text

Abstract:

Abstract Under the “dual carbon” strategy, frequent wide-band grid oscillations caused by grid-following converters as the interface for renewable energy integration have become common. Existing studies suggest that the addition of grid-forming converters can address this issue, but few explain the reasons from a stability mechanism perspective. Additionally, most studies overlook the interaction between converters and sending-end converter stations. This paper first conducts sequential impedance modeling. Then, based on impedance network analysis, it examines the impact of sending-end convert

APA, Harvard, Vancouver, ISO, and other styles

21

Herbst, Gernot. "A Building-Block Approach to State-Space Modeling of DC-DC Converter Systems." J 2, no. 3 (2019): 247–67. http://dx.doi.org/10.3390/j2030018.

Full text

Abstract:

Small-signal models of DC-DC converters are often based on a state-space averaging approach, from which both control-oriented and other frequency-domain characteristics, such as input or output impedance, can be derived. Updating these models when extending the converter by filters or non-trivial loads, or adding control loops, can become a tedious task, however. To simplify this potentially error-prone process, a modular modeling approach is being proposed in this article. It consists of small state-space models for certain building blocks of a converter system on the one hand, and standardiz

APA, Harvard, Vancouver, ISO, and other styles

22

Sapavath, Sreenu, Upendar Jalla, and Sirisha Bogimi. "Analysis of switched impedance source/quasi-impedance source DC-DC converters for photovoltaic system." International Journal of Applied Power Engineering 11, no. 1 (2022): 14~24. https://doi.org/10.11591/ijape.v11.i1.pp14-24.

Full text

Abstract:

This paper proposes the switched impedance source converter (SZSC) or switched quasi impedance source DC-DC converter (S-qZSC) based photovoltaic (PV) grid-connected systems. To increase the voltage from low level to high level, all PV grid-connected systems need step-up DC-DC converters. This step-up factor can be increased by connecting the terminals of a traditional quasi impedance source DC-DC converter with an additional diode and a switch. In this proposed converter, the capacitor not only serves as a filter. It is, however, bound in series to the charging loops of the inductors. On the

APA, Harvard, Vancouver, ISO, and other styles

23

Sreenu, Sapavath, Jalla Upendar, and Bogimi Sirisha. "Analysis of switched impedance source/quasi-impedance source DC-DC converters for photovoltaic system." International Journal of Applied Power Engineering (IJAPE) 11, no. 1 (2022): 14. http://dx.doi.org/10.11591/ijape.v11.i1.pp14-24.

Full text

Abstract:

This paper proposes the switched impedance source converter (SZSC) or switched quasi impedance source DC-DC converter (S-qZSC) based photovoltaic (PV) grid-connected systems. To increase the voltage from low level to high level, all PV grid-connected systems need step-up DC-DC converters. This step-up factor can be increased by connecting the terminals of a traditional quasi impedance source DC-DC converter with an additional diode and a switch. In this proposed converter, the capacitor not only serves as a filter. It is, however, bound in series to the charging loops of the inductors. On the

APA, Harvard, Vancouver, ISO, and other styles

24

Mr., Prasad Arvind Pawar, and R.T.Patil Prof. "SEPIC FOR MAXIMUM POWER EXTRACTION FROM SOLAR PANEL." JournalNX - a Multidisciplinary Peer Reviewed Journal RIT PG Con-18 (April 22, 2018): 204–8. https://doi.org/10.5281/zenodo.1413403.

Full text

Abstract:

The impedance matching circuit is used in between load and PV module to ensure that we are operating at MPP. Impedance matching circuits are nothing but DC-DC converters. With the change in climatic conditions, the duty cycle of converter to operate at MPP changes. Thus the converter must be designed to be able to match MPP under fluctuating atmospheric conditions and load https://journalnx.com/journal-article/20150518

APA, Harvard, Vancouver, ISO, and other styles

25

Mucha, A., M. Schienle, and D. Schmitt-Landsiedel. "A CMOS integrated impedance-to-frequency converter for sensing cellular adhesion." Advances in Radio Science 9 (August 1, 2011): 281–87. http://dx.doi.org/10.5194/ars-9-281-2011.

Full text

Abstract:

Abstract. Sensing cellular adhesion via impedance measurements provides a versatile and easily accessible means for monitoring in-vitro cell cultures. Previous works used external electronics connected via cables to microelectrodes to achieve this goal, thus incurring parasitic impedance, electromagnetic interference, and bulky measurement setups. In this work we present a CMOS impedance-to-frequency converter integrated with biocompatible planar surface electrodes to make a compact and robust sensor chip for in-vitro cell monitoring. The system features an 8×8 array of individually addressabl

APA, Harvard, Vancouver, ISO, and other styles

26

Muhammad, Ado, Jusoh Awang, and Sutikno Tole. "Asymmetric quasi impedance source buck-boost converter." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 2 (2020): 2128–38. https://doi.org/10.11591/ijece.v10i2.pp2128-2138.

Full text

Abstract:

An impedance source buck-boost converter (BBC) prototype for renewable energy (RE) application in the transportation industry is proposed. Its functions include stabilizing the variable output voltage of the RE sources such as fuel cells and photovoltaic cells. The converter utilized a topology of DC-DC quasi-impedance source converters (q-ZSCs) to achieve the gain curve of the BBC. With BBC gain curve, the converter earned advantages over the two other classes of non-isolated DCDC q-ZSCs. These advantages include efficient buck-boost capability at the efficient duty ratio range of 0:35 0:65 a

APA, Harvard, Vancouver, ISO, and other styles

27

Gadalla, Brwene Salah, Erik Schaltz, Yam Siwakoti, and Frede Blaabjerg. "Analysis of loss distribution of Conventional Boost, Z-source and Y-source Converters for wide power and voltage range." Transactions on Environment and Electrical Engineering 2, no. 1 (2017): 1. http://dx.doi.org/10.22149/teee.v2i1.68.

Full text

Abstract:

Boost converters are needed in many applications which require the output voltage to be higher than the input voltage. Recently, boost type converters have been applied for industrial applications, and hence it has become an interesting topic of research. Many researchers proposed different impedance source converters with their unique advantages as having a high voltage gain in a small range of duty cycle ratio. However, the thermal behaviour of the semiconductor devices and passive elements in the impedance source converter is an important issue from a reliability point of view and it has no

APA, Harvard, Vancouver, ISO, and other styles

28

Zhang, Zhuang, Liu, Wang, and Guo. "A Novel Autonomous Current-Sharing Control Strategy for Multiple Paralleled DC–DC Converters in Islanded DC Microgrid." Energies 12, no. 20 (2019): 3951. http://dx.doi.org/10.3390/en12203951.

Full text

Abstract:

Due to the existence of line impedances and low-bandwidth communication, the traditional peer-to-peer control method based on droop control has difficult meeting the requirements of current sharing and voltage stability in islanded DC microgrids at the same time. In this paper, a novel current-sharing control strategy based on injected small ac voltage with low frequency and low amplitude is proposed for multiple paralleled DC–DC converters. The small ac voltage is superimposed onto the output voltage of each converter. Then, the reactive circulating power is generated and used to regulate the

APA, Harvard, Vancouver, ISO, and other styles

29

Zhang, Zhan, Huangqing Xiao, Wenze Liu, and Ying Huang. "Adaptive Switching Control of Voltage Source Converters in Renewable Energy Station Based on Operating Short Circuit Ratio." Symmetry 17, no. 5 (2025): 629. https://doi.org/10.3390/sym17050629.

Full text

Abstract:

By integrating the grid-following control and grid-forming control, the adaptability of grid-connected converters to the grid impedance fluctuation can be effectively improved, and a stable operation in a wide short circuit ratio range can be realized. The existing fusion control schemes focus on the influence of the short circuit ratio on the stability of the converter, ignoring the influence of the active power fluctuation of the renewable energy in the design of the fusion scheme. In order to improve this shortcoming, an adaptive switching control of voltage source converters in the renewab

APA, Harvard, Vancouver, ISO, and other styles

30

Christensen, M. B. B., M. J. Bednarek, P. Koch, T. Podzorny, J. Steckert, and J. Østergaard. "Enabling impedance measurements of energised superconducting circuits through differential probing." Journal of Instrumentation 20, no. 05 (2025): P05042. https://doi.org/10.1088/1748-0221/20/05/p05042.

Full text

Abstract:

Abstract Impedance measurements are essential for validating the electrical integrity of superconducting magnets. However, traditional measurements are conducted on de-energised circuits, restricting the ability to perform continuous validation. To enable measurements on energised systems, several challenges must be addressed. Key of which, the presence of the power converter alters the impedance of the system, and these effects need to be isolated to enable accurate impedance measurements. Additionally, the stimulus signal used for measurement must be designed to prevent degradation of the op

APA, Harvard, Vancouver, ISO, and other styles

31

Ado, Muhammad, Awang Jusoh, and Tole Sutikno. "Asymmetric quasi impedance source buck-boost converter." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 2 (2020): 2128. http://dx.doi.org/10.11591/ijece.v10i2.pp2128-2138.

Full text

Abstract:

An impedance source buck-boost converter (BBC) prototype for renewable energy (RE) application in the transportation industry is proposed. Its functions include stabilizing the variable output voltage of the RE sources such as fuel cells and photovoltaic cells. The converter utilized a topology of DC-DC quasi-impedance source converters (q-ZSCs) to achieve the gain curve of the BBC. With BBC gain curve, the converter earned advantages over the two other classes of non-isolated DC-DC q-ZSCs. These advantages include ecient buck-boost capability at the ecient duty ratio range of 0:35-0:65 and co

APA, Harvard, Vancouver, ISO, and other styles

32

Belqasem, Aljafari. "DESIGN OPTIMIZATION OF RESONANT DC-DC CONVERTERS." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 5, no. 4 (2016): 409–11. https://doi.org/10.5281/zenodo.49719.

Full text

Abstract:

Resonant DC/DC converters are the class of converters, which have L-C resonant tank serving as a major part of the power conversion process. The fundamental concept of the resonant converter is that the circulating energy in an L-C resonant circuit is manageable by changing the operating frequency, and therefore the converter can condition the input power to the desired output voltage. The development in power conversion technology is steady demand for high power efficiency and high power density. A high efficiency is achieved by using series resonant converter (SRC) topology. It may operate i

APA, Harvard, Vancouver, ISO, and other styles

33

Kontorski, Kamil, Ryszard Rybski, and Janusz Kaczmarek. "Improving the Accuracy of Digital Unbalanced Impedance Bridges." Energies 16, no. 9 (2023): 3833. http://dx.doi.org/10.3390/en16093833.

Full text

Abstract:

This article presents an automatic digital unbalanced impedance bridge for comparing two-port impedances: R-R, R-C and C-C. The bridge consists of a two-channel digital source of voltage sinusoidal waveforms supplying the bridge arms and a three-channel precise digitizer, by means of which the complex ratio of the source output voltages and the relative bridge unbalanced voltage are determined. The hardware implementation of the bridge is based on a relatively inexpensive universal data acquisition (DAQ) card by National Instruments, USB-6281, which contains, among others, a multi-channel 18-b

APA, Harvard, Vancouver, ISO, and other styles

34

Hassan, Zahid, M. A. Khan, and Md Rabiul Islam. "Impedance network-based ultra sparse matrix converter with enhanced voltage gain." International Journal of Power Electronics and Drive Systems (IJPEDS) 15, no. 4 (2024): 2262. http://dx.doi.org/10.11591/ijpeds.v15.i4.pp2262-2274.

Full text

Abstract:

The matrix converter is devised to achieve sinusoidal input current and output voltage, and high power density. The typical matrix converter gives voltage gain less than unity using a significantly large number of switches. To reduce the number of switches an ultra sparse matrix converter (USMC) is introduced whose voltage gain is still less than unity. Researchers also introduced many modified versions of these matrix converters including quasi-Z-source, series Zsource, switched inductor, and switched capacitor USMCs. Although all of these matrix converters have their relative advantages and

APA, Harvard, Vancouver, ISO, and other styles

35

Hassan, Zahid, M. A. Khan, and Md. Rabiul Islam. "Impedance network-based ultra sparse matrix converter with enhanced voltage gain." International Journal of Power Electronics and Drive Systems (IJPEDS) 15, no. 4 (2024): 2262–74. https://doi.org/10.11591/ijpeds.v15.i4.pp2262-2274.

Full text

Abstract:

The matrix converter is devised to achieve sinusoidal input current and output voltage, and high power density. The typical matrix converter gives voltage gain less than unity using a significantly large number of switches. To reduce the number of switches an ultra sparse matrix converter (USMC) is introduced whose voltage gain is still less than unity. Researchers also introduced many modified versions of these matrix converters including quasi-Z-source, series Zsource, switched inductor, and switched capacitor USMCs. Although all of these matrix converters have their relative advantages and

APA, Harvard, Vancouver, ISO, and other styles

36

Pham, Minh-Duc, Tuyen D. Nguyen, and Hong-Hee Lee. "A Centralized Shifted Power Control Scheme for Isolated Bidirectional DC-DC Converter in Standalone DC Distribution System." Renewable Energy and Power Quality Journal 20 (September 2022): 37–42. http://dx.doi.org/10.24084/repqj20.212.

Full text

Abstract:

When parallel converter structures are considered in modern DC distribution systems, several challenges are faced in the energy management system (EMS). For example, the circuit parameter mismatches of parallel isolated DC-DC converter modules will cause power imbalances, which is the most important concern in DC distribution system. To deal with this issue, this study presents a power management control scheme in the EMS to ensure the power balance of isolated DC-DC converters in DC distribution system. In the proposed method, the proposed shifted voltage is introduced at the output of each c

APA, Harvard, Vancouver, ISO, and other styles

37

Fu, Xiao, Huaibao Wang, Xiaoqiang Guo, et al. "A Novel Circulating Current Suppression for Paralleled Current Source Converter Based on Virtual Impedance Concept." Energies 15, no. 5 (2022): 1952. http://dx.doi.org/10.3390/en15051952.

Full text

Abstract:

The circulating current is one of the important issues for parallel converters. It affects the system stable operation and degrades the power quality. In order to reduce the circulating current of the parallel converter and reduce the harmonic pollution to the power grid, a new circulating current suppression strategy is proposed for the parallel current source converter without any communication line. This strategy is able to realize the current sharing between parallel modules by changing the external characteristics of the parallel modules to thus suppress the circulating current among the

APA, Harvard, Vancouver, ISO, and other styles

38

V., Saravanan, M. Venkatachalam K., M. Venkatachalam K., A. K. Borelessa M., and T. M. U. Hemapala K. "Review of impedance source power converter for electrical applications." International Journal of Advances in Applied Sciences (IJAAS) 10, no. 4 (2021): 310–34. https://doi.org/10.11591/ijaas.v10.i4.pp310-334.

Full text

Abstract:

Power electronic converters have been actively researched and developed over the past decades. There is a growing need for new solutions and topography to increase the reliability and efficiency of alternatives with lower cost, size and weight. Resistor source converter is one of the most important power electronic converters that can be used for AC-DC, AC-AC, DC-DC and DC-DC converters which can be used for various applications such as photovoltaic systems, wind power systems, electricity. Vehicles and fuel cell applications. This article provides a comprehensive overview of Z-source converte

APA, Harvard, Vancouver, ISO, and other styles

39

Salehi, Navid, Herminio Martínez-García, and Guillermo Velasco-Quesada. "Modified Cascaded Z-Source High Step-Up Boost Converter." Electronics 9, no. 11 (2020): 1932. http://dx.doi.org/10.3390/electronics9111932.

Full text

Abstract:

To improve the voltage gain of step-up converters, the cascaded technique is considered as a possible solution in this paper. By considering the concept of cascading two Z-source networks in a conventional boost converter, the proposed topology takes the advantages of both impedance source and cascaded converters. By applying some modifications, the proposed converter provides high voltage gain while the voltage stress of the switch and diodes is still low. Moreover, the low input current ripple of the converter makes it absolutely appropriate for photovoltaic applications in expanding the lif

APA, Harvard, Vancouver, ISO, and other styles

40

Chen, Xunjun, and Zhigang Liu. "Impedance Modeling and Stability Analysis of the Converters in a Double-Fed Induction Generator (DFIG)-Based System." Energies 12, no. 13 (2019): 2500. http://dx.doi.org/10.3390/en12132500.

Full text

Abstract:

Harmonic stability of double-fed induction generators (DFIGs) now has become a significant topic because of its harmful impact on power quality issues of the system. Since the double pulse width modulation (PWM) converter is one of the main harmonic sources in DFIGs, it may cause harmonic instability with increasing harmonic contents. Thus, the modeling and stability analyses of PWM converters in DFIGs are essential steps to assess the harmonic stability of DFIGs. Aiming at dual PWM converters, which include the grid side converter (GSC) and the rotor side converter (RSC), this paper divides c

APA, Harvard, Vancouver, ISO, and other styles

41

Sai Charishma Pathala, Venkata, and V. Y. Jayasree Pappu. "Elimination of CM Noise from SMPS Circuit using EMI Filter." International journal of electrical and computer engineering systems 14, no. 4 (2023): 465–71. http://dx.doi.org/10.32985/ijeces.14.4.10.

Full text

Abstract:

The electronic devices are exposed to external electromagnetic signals that produce an unwanted signal called noise in the circuit, which causes electromagnetic interference [EMI] problems. It occurs in two modes: radiated mode and conducted mode. In the radiation mode, the shielding technique is used for radiation mode, in conduction mode filtering technique is used. The design of an EMI filter depends upon the type of noise generated by the Switched Mode Power supply circuit [SMPS]. The SMPS circuit used in this paper is a DC-DC power converter, the Boost converter is a step-up converter and

APA, Harvard, Vancouver, ISO, and other styles

42

Saravanan, V., K. M. Venkatachalam, M. Arumugam, M. A. K. Borelessa, and K. T. M. U. Hemapala. "Review of impedance source power converter for electrical applications." International Journal of Advances in Applied Sciences 10, no. 4 (2021): 310. http://dx.doi.org/10.11591/ijaas.v10.i4.pp310-334.

Full text

Abstract:

<p>Power electronic converters have been actively researched and developed over the past decades. There is a growing need for new solutions and topography to increase the reliability and efficiency of alternatives with lower cost, size and weight. Resistor source converter is one of the most important power electronic converters that can be used for AC-DC, AC-AC, DC-DC and DC-DC converters which can be used for various applications such as photovoltaic systems, wind power systems, electricity. Vehicles and fuel cell applications. This article provides a comprehensive overview of Z-source

APA, Harvard, Vancouver, ISO, and other styles

43

Zhuang, Shenglun, Xiangmei Kong, and Sujuan Sun. "Virtual impedance optimization control strategy for wind turbine grid-forming converters in weak grid." Journal of Physics: Conference Series 2855, no. 1 (2024): 012005. http://dx.doi.org/10.1088/1742-6596/2855/1/012005.

Full text

Abstract:

Abstract Grid forming(GFM) technology is key to the effective consumption and grid-friendly integration of large-scale wind power. However, as the new type of power system sees a high penetration of new energy sources and a decrease in circuit capacity, leading to systems exhibiting weak grid characteristics, this paper studies the adaptive characteristics of grid-forming wind turbine converters under weak grid conditions. It investigates the dynamic relationship between power coupling characteristics and the system impedance ratio based on the virtual impedance method and proposes an impedanc

APA, Harvard, Vancouver, ISO, and other styles

44

Yao, Qi, Dylan-Dah-Chuan Lu, and Gang Lei. "Accurate Online Battery Impedance Measurement Method with Low Output Voltage Ripples on Power Converters." Energies 14, no. 4 (2021): 1064. http://dx.doi.org/10.3390/en14041064.

Full text

Abstract:

The conventional online battery impedance measurement method works by perturbing the duty cycle of the DC-DC power converter and measuring the response of the battery voltage and current. This periodical duty cycle perturbation will continuously generate large voltage ripples at the output of power converters. These large ripples will not easily be removed due to the high amplitude and wide frequency range and would be a challenge to meet tight output regulation. To solve this problem, this paper presents a new online battery impedance measurement technique by inserting a small switched resist

APA, Harvard, Vancouver, ISO, and other styles

45

Xie, Guang Jun, Hai Bin Fang, and Hui Fang Xu. "Analysis of Multi-Converter System’s Stability Using the Active Damping Method." Applied Mechanics and Materials 58-60 (June 2011): 950–55. http://dx.doi.org/10.4028/www.scientific.net/amm.58-60.950.

Full text

Abstract:

In Multi-converter power electronic systems, load converters exhibit constant power load (CPL) behavior for the feeder converters and tend to destabilize the system. In this paper, Buck DC-DC converters are taken as an example, and the implementation of active-damping techniques has been shown to analyze the stability of multi-converter power electronic systems. Moreover, active damping is generally implemented by a feedback loop, which produces the effect of a virtual resistor and damps the oscillations, the proposed active-damping method can overcome the negative impedance instability proble

APA, Harvard, Vancouver, ISO, and other styles

46

Janke, W., M. Bączek, and M. Walczak. "Output characteristics of step-down (Buck) power converter." Bulletin of the Polish Academy of Sciences: Technical Sciences 60, no. 4 (2012): 751–55. http://dx.doi.org/10.2478/v10175-012-0086-6.

Full text

Abstract:

Abstract The output characteristics of switched-mode dc-dc buck power converter are discussed. The shape of output characteristics is especially important for converters used for supplying modern processors. An output impedance is usually used for description of output characteristics. Many efforts are described in the literature to obtain the satisfastory features of closed-loop output impedance. Another approach, presented in the paper, is based on the concept of the output voltage response corresponding to the load conductance change, and is expressed by hr transmittance. Simulations of out

APA, Harvard, Vancouver, ISO, and other styles

47

Sreenu, Sapavath, Jalla Upendar, and Bogimi Sirisha. "Implementation and study of switched impedance boost and KY-boost converters for electric vehicle." International Journal of Power Electronics and Drive Systems (IJPEDS) 15, no. 1 (2024): 367. http://dx.doi.org/10.11591/ijpeds.v15.i1.pp367-376.

Full text

Abstract:

A DC/DC converter based on photovoltaic (PV) grid connections is proposed here. This work focuses on the switched impedance source (S¬_ZSC) for electric vehicles. Every PV grid-connected system require step-up DC/DC converters to boost voltage range from low to high. Connecting an extra diode and a switch to the terminals of a standard quasi-impedance source DC/DC converter raises the step-up factors. In this proposed converter, this capacitor does more than just filter noise. Saturated inductors, on the other hand, can cause instability that needs not occur. In any case, the modulation index'

APA, Harvard, Vancouver, ISO, and other styles

48

Santos, José, and Pedro Ramos. "DSPIC-Based Impedance Measuring Instrument." Metrology and Measurement Systems 18, no. 2 (2011): 185–98. http://dx.doi.org/10.2478/v10178-011-0002-0.

Full text

Abstract:

DSPIC-Based Impedance Measuring Instrument An implemented impedance measuring instrument is described in this paper. The device uses a dsPIC (Digital Signal Peripheral Interface Controller) as a processing unit, and a DDS (Direct Digital Synthesizer) to stimulate the measurement circuit composed by the reference impedance and the unknown impedance. The voltages across the impedances are amplified by programmable gain instrumentation amplifiers and then digitized by analog to digital converters. The impedance is measured by applying a seven-parameter sine-fitting algorithm to estimate the sine

APA, Harvard, Vancouver, ISO, and other styles

49

Gaddala, Ravi Kumar, Mriganka Ghosh Majumder, and Kaushik Rajashekara. "DC-Link Voltage Stability Analysis of Grid-Tied Converters Using DC Impedance Models." Energies 15, no. 17 (2022): 6247. http://dx.doi.org/10.3390/en15176247.

Full text

Abstract:

With the integration of renewable energy sources into the power grid, a number of power electronic converters need to be connected together in parallel. Due to this interconnection among the power converters with a common DC bus, the equivalent impedance of the DC network, i.e., DC network impedance (DCNI) of these parallel converters, may vary and can cause oscillations in the DC link voltage (DCLV). In the literature, impedance models of grid-tied converters (GCs) based on the AC side are well reported without including these variations in DCNI. In addition, the dynamics of a phase-locked lo

APA, Harvard, Vancouver, ISO, and other styles

50

Yu, Zhi Yong, Ming Lu, Zhen Nan Wang, and Yi Gong Zhang. "A Droop Control Strategy with Impedance Compensation for Low Voltage Microgrid." Applied Mechanics and Materials 441 (December 2013): 245–48. http://dx.doi.org/10.4028/www.scientific.net/amm.441.245.

Full text

Abstract:

With conventional droop control, parallel operation of distributed generations (DG) in microgrid would lead to unbalanced power sharing. In this paper, inherent limitation of conventional droop control is analyzed. Analysis results show that different converter output impedance and line impedance make the power sharing unbalanced. In order to weaken or eliminate impedance difference from point of common coupling (PCC) to DGs, virtual impedance is introduced. By the introduction of designed virtual impedance, a novel droop control strategy with impedance compensation is proposed in this paper.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!