Mechanism and evaluating method for HVDC commutation failure caused by inrush current

被引：0
|
作者：
Rao Y. [1 ]
Zhang P. [2 ]
Li C. [1 ]
Tian C. [1 ]
Fang Z. [1 ]
Jiao Z. [2 ]
机构：
[1] Electric Power Research Institute of State Grid Henan Electric Power Company, Zhengzhou
[2] Shaanxi Key Laboratory of Smart Grid (Xi’an Jiaotong University)., Xi'an
来源：
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2019年 / 47卷 / 13期
基金：
中国国家自然科学基金;
关键词：
Commutation failure; Commutation voltage time area; HVDC; Inrush current; Voltage distortion;
D O I：
10.19783/j.cnki.pspc.180885
中图分类号：
学科分类号：
摘要：
Switching on no-load transformer in AC system will generate serious inrush current. The injection of this inrush current will lead to the change of fundamental voltage and voltage distortion at AC bus of inverter, which will inevitable influence the commutation process of the inverter. At present, the research is mainly focused on the commutation failure caused by the change of fundamental voltage, while the study of commutation failure resulted by voltage distortion is less. The mechanism of commutation failure created by voltage distortion is analyzed from a perspective of the commutation voltage time area. On this basis, a quick way to evaluate whether the inrush current will bring about commutation failure or not is proposed. This will provide guidance for taking timely and effective actions, which have great sense of making sure the grid operate safely and stably. Finally, the PSCAD/EMTDC simulation results prove the method of evaluation is effective. © 2019, Power System Protection and Control Press. All right reserved.
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页码：54 / 61
页数：7
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