Results 71 to 80 of about 420,105 (198)

Analysis of submodule overvoltage mechanism and suppression strategy for DC chopper

Journal of Physics: Conference Series
Abstract In flexible DC transmission systems, when a fault occurs in the receiving-end AC system, it results in a power surplus on the receiving-end DC side. This necessitates a dynamic active power balancing device, leading to the emergence of the DC chopper in this context.
Xue Bai, Fan Zhang, Lanfang Li, Ying Pu, Jiajun Li, Lingfei Xiong, Linzhen Fan   +6 more
openaire   +1 more source

Reactive power sensitivity-based novel overvoltage suppression strategy for parallel VSC-and-LCC-HVDC transmission system

International Journal of Electrical Power & Energy Systems
The rapid deployment of both line-commutated converter-based high-voltage direct current (LCC-HVDC) and voltage source converter-based high-voltage direct current (VSC-HVDC) does not only prolificate AC/DC grid coupling but also form new DC transmission ...
Yi Hao, Lujie Yu, Chuanjie Nie, Fengdi Li, Heyu Luo   +4 more
doaj   +1 more source

Evaluation of the efficacy of transient overvoltages suppression measures in different wind farm topologies using SF6 circuit breaker. [PDF]

Sci Rep, 2023
Eliyan T, Wadie F.
europepmc   +1 more source

Overvoltage Suppression Strategy of LCC-HVDC Delivery System Based on Hydropower Phase Control Participation

In a high-voltage direct current (HVDC) transmission system, commutation failure at the receiving end may lead to transient overvoltage at the sending end converter bus of the weak alterative current (AC) system. Firstly, the principle calculation method
Peng Shi, Xiaorong Wu, Yuanqi Li, Jianquan Liao, Weigang Zeng, Huabo Shi, Yuhong Wang, Bin Cao   +7 more
core   +1 more source

Overvoltage analysis and suppression for the power collection system in the far-offshore wind farm with VSC-HVDC grid connection

电力工程技术
At present, the related research on the internal overvoltage of the power collection system is mostly about the offshore wind farms connected to the grid through high voltage AC transmission lines, but the far-offshore wind farms that are connected to ...
Wenjing CHENG, Ru'an DING, Tiebing LU
doaj   +1 more source

Protection against lightning and overvoltage

, 2005
Tato bakalářská práce se zabývá ochranou technických prostředků pro ochranu majetku před bleskem a přepětím. V práci jsou uvedeny legislativní podmínky pro použití přepěťových ochran.
Horák, Martin
core   +2 more sources

Research on Coordinated Control of Dynamic Reactive Power Sources of DC Blocking and Commutation Failure Transient Overvoltage in New Energy Transmission

Energies
With the large-scale deployment of renewable energy, transmission systems for new energy sources are increasingly exposed to transient overvoltage issues induced by DC blockages and commutation failures. To address the challenges of an imprecise response
Shuqin Sun, Zhenghai Yuan, Dezhi Chen, Zaihua Li, Xiaojun Tang, Yunting Song, Guanghao Zhou   +6 more
doaj   +1 more source

An overvoltage suppression scheme for AC motor drives using a half DC-link voltage level at each PWM transition

, 2019
Passive filters are conventionally used to suppress overvoltage in the motor terminal, either by reducing the voltage rising rate at the inverter output, or by decreasing the motor terminal impedance.
Lee, S, Nam, K
core   +1 more source

Novel Resonant DC Breaker with Capacitor Self-Charging by Controllable Injection Energy and Internal Overvoltage Suppression

With the rapid development of DC grids, resonant DC circuit breakers (RDCBs) have become critical for fault isolation. However, existing RDCBs often suffer from severe energy mismatches, and components, including mechanical switches, resonant capacitors,
Zhicheng Zhang, Xingning Han, Weijie Wen, Yumin Zhang, Bin Li   +4 more
core   +1 more source

An Improved Suppression Method of AC Transient Overvoltage for Line Commuted Converter Based High Voltage Direct Current Considering AC-DC System Coupling

Commutation failures in line commuted converter-based high voltage direct current (LCC-HVDC) transmission systems leads to an increase in the converter bus voltage of the rectifier station, thus resulting in AC transient overvoltage in the sending-end ...
Yujie Chen, Yanbo Diao, Jinxin Ouyang, Xinyu Pan   +3 more
core   +1 more source