Results 21 to 30 of about 103 (62)
Review of Research on Voltage Dependent Current Order Limiter for Commutation Failure Mitigation [PDF]
Dianli jianshe[Objective] The objective of this study is to systematically sort out the research status of the voltage dependent current order limiter（VDCOL）improvement method to enhance the ability of VDCOL control to commutation failure in high-voltage direct ...
ZHU Xuan, TANG Yi, ZHENG Chenyi, WANG Ying, DANG Jie, CUI Ting
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IEEE Access, 2020 To mitigate commutation failures (CFs) and minimize the instability of HVDC systems due to AC faults or control mode ambiguity, a constant extinction voltage-time area based control strategy with virtual resistance is proposed.
Zhanhong Wei, Wanliang Fang, Jun Liu
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Enhanced constant extinction angle control for subsequent commutation failure in LCC‐HVDC
IET Generation, Transmission &Distribution, Volume 19, Issue 1, January/December 2025.The key control factor affecting subsequent commutation failure suppression in line‐commutated converter‐based high‐voltage direct current were identified. Some conclusions from previous literature were corrected, and an adaptive integral parameter adjustment strategy to enhanced control ability and suppress subsequent commutation failure was ...
Hao Li +3 more
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The Journal of Engineering, Volume 2019, Issue 16, Page 820-825, March 2019., 2019 A hybrid high‐voltage direct current (HVDC) system comprises a line commutated converter (LCC) at the rectifier side and a voltage source converter (VSC) at the inverter side, combining advantages of both LCC and VSC systems. However, the asymmetric converters at both ends of line constrain the direct application of line protections used for ...
Yanting Wang +2 more
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IET Generation, Transmission &Distribution, Volume 19, Issue 1, January/December 2025.In order to address the limitations of conventional strategies, this paper proposes a staged reactive power control strategy that employs a combined criterion based on the magnitude of the AC voltage dip and the extinction angle. The proposed strategy enables dynamic adjustment of reactive power during severe AC voltage dips, thereby ensuring voltage ...
Xianbo Ke, Jun Liu
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Study on working condition of 750 kV AC filter breaker in ± 1100 kV UHVDC system
The Journal of Engineering, Volume 2019, Issue 16, Page 839-844, March 2019., 2019 In this article, the Changji‐Guquan ± 1100 kV ultra‐high voltage direct current (UHVDC) system has been established by PSCAD software, especially for the arc of the circuit breakers. The AC filter groups and the control strategy have been analysed based on the reactive power demand of this system, AC system voltage amplitude, and harmonic limit.
Zexin Zhao +4 more
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Available transfer capability analysis method of AC–DC power system based on security region
The Journal of Engineering, Volume 2019, Issue 16, Page 2386-2390, March 2019., 2019 Available transfer capability (ATC) refers to the reliable power transfer capability for further commercial activities in the system based on current protocols. Traditional ATC method such as continuation power flow (CPF) can calculate ATC only based on a specific direction of load and generator, optimal power flow (OPF) cannot acquire accurate value ...
Sicheng Wang, Shan Gao
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International Journal of Electrical Power & Energy SystemsHVDC systems are vulnerable to commutation failure due to insufficient commutation margin during AC faults, which threatens system stability. Existing optimization strategies are often computationally complex and heavily reliant on simulation models ...
Tongtong Zhang, Shuqing Zhang
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The Journal of Engineering, Volume 2019, Issue 16, Page 1709-1714, March 2019., 2019 This study presents the comparison among three control systems: Cigre Benchmark model, ABB model, and SIMENS model based on PSCAD. Firstly, the control systems which refer to Cigre Benchmark control model, ABB control model, and SIMENS control model are introduced, respectively.
Zou Jian +6 more
wiley +1 more source
International Journal of Electrical Power & Energy SystemsThe fast DC current recovery is widely adopted in the existing Voltage Dependent Current Order Limiter (VDCOL) for Line Commutated Converter-based High Voltage Direct Current (LCC-HVDC) systems to mitigate transient overvoltage in the sending-end grid ...
Bo Pang +6 more
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