Output voltage balancing methods of 3-level NPC rectifier for low voltage DC distribution

2015 ◽  
Author(s):  
Ho-Sung Kim ◽  
Ju-Won Baek ◽  
Jintae Cho ◽  
Jaehan Kim ◽  
Juyong Kim
Keyword(s):  
Output Voltage ◽  
Low Voltage ◽  
Voltage Balancing ◽  
Dc Distribution

scholarly journals A Generalized Multilevel Inverter Based on T-Type Switched Capacitor Module with Reduced Devices

Energies ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4406
Author(s):  
Yaoqiang Wang ◽  
Yisen Yuan ◽  
Gen Li ◽  
Tianjin Chen ◽  
Kewen Wang ◽  
...  
Keyword(s):  
Output Voltage ◽  
Low Voltage ◽  
Multilevel Inverter ◽  
Switched Capacitor ◽  
Voltage Gain ◽  
Voltage Balancing ◽  
Multilevel Inverters ◽  
Photovoltaic Power ◽  
High Output Voltage ◽  
High Output

Conventional multilevel inverters have problems in terms of their complicated expansion and large number of devices. This paper proposes a modular expanded multilevel inverter, which can effectively simplify the expansion and reduce the number of devices. The proposed inverter can ensure the voltage balancing of the voltage-dividing capacitors. The cascading of the T-type switched capacitor module and the step-by-step charging method of the switched capacitors enable the inverter to achieve high output voltage levels and voltage gain. In addition, the inversion can be achieved without the H-bridge, which greatly reduces the total standing voltage of the switches. The nine-level inverter of the proposed topology can be realized with only ten switches, obtaining a voltage gain that is two times larger. The above merits were validated through theoretical analysis and experiments. The proposed inverter has good application prospects in medium- and low-voltage photovoltaic power generation.

Formulated Representation for Upper Limitation of Deliverable Power in Low-Voltage DC Distribution System

2011 ◽  
Vol 131 (4) ◽  
pp. 362-368 ◽  
Author(s):  
Yasunobu Yokomizu ◽  
Doaa Mokhtar Yehia ◽  
Daisuke Iioka ◽  
Toshiro Matsumura
Keyword(s):  
Distribution System ◽  
Low Voltage ◽  
Dc Distribution

Design Aspects of Medium and Low Voltage DC Distribution Grids - An Overview

2020 ◽  
Author(s):  
Julian Saat ◽  
Raphael Bleilevens ◽  
Dominik Mildt ◽  
Jens Priebe ◽  
Niklas Wehbring ◽  
...  
Keyword(s):  
Low Voltage ◽  
Dc Distribution ◽  
Distribution Grids

scholarly journals Novel High-Efficiency High Step-Up DC–DC Converter with Soft Switching and Low Component Voltage Stress for Photovoltaic System

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1112
Author(s):  
Yu-En Wu ◽  
Jyun-Wei Wang
Keyword(s):  
High Voltage ◽  
Output Voltage ◽  
High Efficiency ◽  
Low Voltage ◽  
Leakage Inductance ◽  
Power Switch ◽  
Half Wave Voltage ◽  
Half Wave ◽  
Voltage Stress ◽  
Voltage Doubler

This study developed a novel, high-efficiency, high step-up DC–DC converter for photovoltaic (PV) systems. The converter can step-up the low output voltage of PV modules to the voltage level of the inverter and is used to feed into the grid. The converter can achieve a high step-up voltage through its architecture consisting of a three-winding coupled inductor common iron core on the low-voltage side and a half-wave voltage doubler circuit on the high-voltage side. The leakage inductance energy generated by the coupling inductor during the conversion process can be recovered by the capacitor on the low-voltage side to reduce the voltage surge on the power switch, which gives the power switch of the circuit a soft-switching effect. In addition, the half-wave voltage doubler circuit on the high-voltage side can recover the leakage inductance energy of the tertiary side and increase the output voltage. The advantages of the circuit are low loss, high efficiency, high conversion ratio, and low component voltage stress. Finally, a 500-W high step-up converter was experimentally tested to verify the feasibility and practicability of the proposed architecture. The results revealed that the highest efficiency of the circuit is 98%.

Load-Switching Strategy for Voltage Balancing of Bipolar DC Distribution Networks Based on Optimal Automatic Commutation Algorithm

2021 ◽  
pp. 1-1
Author(s):  
Jianquan Liao ◽  
Niancheng Zhou ◽  
Qianggang Wang ◽  
Yuan Chi
Keyword(s):  
Distribution Networks ◽  
Voltage Balancing ◽  
Switching Strategy ◽  
Dc Distribution

A novel dual output boost converter with output voltage balancing

2016 ◽  
Author(s):  
Siho Park ◽  
Honnyong Cha ◽  
Heung-Geun Kim ◽  
Juyong Kim ◽  
Jintae Cho
Keyword(s):  
Output Voltage ◽  
Boost Converter ◽  
Voltage Balancing
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