Results 1 to 10 of about 3,351 (189)

Analysis of suppression switching overvoltage for CRAFT power supply

Energy Reports, 2022
In order to solve the problem of switching overvoltage for CRAFT, an optimal design is put forward to suppress overvoltage, which aims to enable the converter thyristor work normal.
Yalong Yang, Ling Zhang, Ge Gao, Li Jiang, Fengwei Zha   +4 more
doaj   +2 more sources

Mechanism and suppression of breaking overvoltage of DC circuit breakers

High Voltage
The occurrence of breaking overvoltage in a DC circuit breaker (DCCB) poses a potential threat to the safe operation of a DC grid. Based on the structure of the ±10 kV three‐terminal DC distribution network, this paper sets up the medium‐voltage DCCB and
Lu Qu, Zhangqing Yu, Zhizheng Gan, Xin Yan, Cheng Jiang, Yulong Huang, Mingshen Li, Jian Feng   +7 more
doaj   +2 more sources

Research on Overvoltage Suppression by Blocking Diode and DC Circuit Breaker in LCC-VSC Hybrid HVDC System

IEEE Access, 2021
In this study, a LCC-VSC hybrid HVDC transmission system was taken as an example. The valve and neutral overvoltage of the hybrid HVDC system were simulated and then calculated at the VSC converter station by installing a blocking diode and a DC circuit ...
Wang Dongju, Zhou Hao
doaj   +1 more source

Energy Storage System Control Strategy for Restraining Overvoltage Caused by Switching Non-Load Power Transmission Lines

IEEE Access, 2021
During the switching operation of the non-load power transmission lines, the undisired switching overvoltage issue is inevitable, causing grid voltage oscillations, waveform distortion and other phenomena at the end of the non-load power transmission ...
Bo Yang, Haojie Yu, Guanjun Li, Anping Hu, Haoyuan Li   +4 more
doaj   +1 more source

Simulation and Protection of Reignition Overvoltage in Wind Farm Considering Microscopic Dielectric Recovery Process of Vacuum Circuit Breaker

Energies, 2023
The high amplitude and steep overvoltage generated by the breaking of the vacuum circuit breaker in the wind farm damages the inter-turn insulation of the transformer.
Ziheng Pu, Hao Liu, Yaoqiang Wang, Xinyun Yu, Tian Wu   +4 more
doaj   +1 more source

Research on overvoltage characteristics and influencing factors of converter station under grounding fault

Energy Reports, 2022
In grounding fault of DC system, overvoltage will appear on equipment nodes in converter station. Due to different operation mode and equipment type, it is very different from overvoltage in AC system.
Zongyang Zhang, Zhiyuan Wang, Chao Kang, Fang Yu, Zixin Ma, Jie Guo   +5 more
doaj   +1 more source

Multi DC coordinated transient overvoltage suppression strategy for high proportion new energy sending terminal area

电力工程技术, 2023
Aiming at the transient overvoltage problem of high proportion new energy multi direct current (DC) transmission system caused by DC blocking fault, the interaction mechanism between multiple DC lines is analyzed firstly and the multi-outfeed voltage ...
ZHANG Qirui, XIN Chaoshan, LI Fengting, YIN Chunya, LIU Jiangshan, LI Yuan   +5 more
doaj   +1 more source

Investigation of a Low-Speed Commutation Voltage Shock Problem in Three-Level ANPC Inverter with Hybrid Modulation Mode

Machines, 2023
With the development of the photovoltaic industry; there will be an increasing demand for efficient, high-power density, and low-cost grid interface converters.
Jian Yu, Renhui Shen, Le Zhou, Zelin Jia, Yulong Hao   +4 more
doaj   +1 more source

Performance Evaluation and Limitations of Overvoltage Suppression Circuits for Low- and Medium-Voltage DC Solid-State Breakers

IEEE Open Journal of Power Electronics, 2021
This paper presents a design and performance evaluation of three different overvoltage suppression circuits employed in a solid-state circuit breaker for medium- to high-power and low- to medium-voltage DC grids.
Andreas Giannakis, Dimosthenis Peftitsis
doaj   +1 more source

Novel method for restraining 35 kV shunt reactor switching overvoltage – phase controlled breaker

The Journal of Engineering, 2019
Phenomena such as current chopping, arc reignition and equivalent current chopping might appear when cutting off shunt reactor. Overvoltage caused by switching will lead to interphase fault in related equipment and inter-turn insulation damage in the ...
Yiming Zheng, Bing Yu, Hua Xu, Dong Yan, Xianliang Li, Wenlin He   +5 more
doaj   +1 more source