A residual current compensation control method based on a PWM-controlled converter

被引：0
|
作者：
Wang P. [1 ]
Feng G. [1 ]
Wang H. [2 ]
Chen M. [2 ]
Zhang J. [2 ]
Shi G. [2 ]
Jia Y. [2 ]
机构：
[1] Electric Power Research Institute of State Grid Hehan Electric Power Company, Zhengzhou
[2] Shanghai Jiao Tong University Wind Power Research Center, Shanghai
来源：
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2021年 / 49卷 / 18期
关键词：
Active damping current; Full compensation arc suppression coil; PWM-controlled converter; Residual-current compensation; Single-phase ground fault;
D O I：
10.19783/j.cnki.pspc.201357
中图分类号：
学科分类号：
摘要：
There is a problem of poor real-time compensation ability of a grounding residual current of traditional full compensation arc suppression device in a distribution network. There is also a long-time resonance state after fault recovery. Thus a full compensation control method of grounding residual current based on a PWM-controllable converter is proposed. The principle of full compensation fault arc suppression is discussed in detail, and the capacitance to ground is measured by the frequency sweep method. The relationship between zero sequence voltage and residual current component is theoretically deduced, and a real-time control method of residual current full compensation is proposed. The active damping current injection method is used to detect the ground fault recovery in real time, and the calculation basis of active damping current is analyzed theoretically. Finally, a digital simulation study on the compensating effect of the fault current based on a 10 kV single-phase grounding distribution network is carried out. The results show that the grounding fault current can be compensated for quickly and effectively, and the full compensation device can quickly exit the operation after the fault recovery. This shows the correctness and feasibility of the proposed control strategy. © 2021 Power System Protection and Control Press.
引用
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页码：110 / 118
页数：8
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