Commutation Failure Mitigation Based on Detecting the Direct Voltage Difference Caused by Mutual Inductance of Transmission Lines in ±1 100 kV HVDC Systems

被引：0

作者：

She Z. ^{[1
]}

Liu K. ^{[2
]}

Zhang Q. ^{[2
]}

Shi Q. ^{[2
]}

Liu X. ^{[2
]}

机构：

[1] DC Technical Center of State Grid Corporation of China, Beijing

[2] NR Electric Co., Ltd., Nanjing

来源：

Gaodianya Jishu/High Voltage Engineering | 2020年 / 46卷 / 08期

基金：

国家重点研发计划;

关键词：

Commutation failure mitigation; Commutation margin; Direct voltage difference; Electromagnetic coupling; Line fault; Mutual inductance; Transmission lines; UHVDC;

D O I：

10.13336/j.1003-6520.hve.20200302015

中图分类号：

学科分类号：

摘要：

Due to the electromagnetic coupling between the long bipole transmission lines in the long-distance UHVDC project, the non-fault pole would be influenced and suffer from an increased risk of commutation failure when fault or disturbance occurs on the other pole. In this paper, an equivalent electrical circuit is built to analyze the characteristics of the mutual inductance between the bipole transmission lines during the transient line fault on one pole. A novel method for commutation failure mitigation is proposed. The proposed strategy has the ability to decrease the firing angle of thyristor valves quickly to ensure a sufficient commutation margin when a preset limit of the inverter pole direct voltage difference is reached. Finally, tests have been carried out on the real time digital simulation prototyping platform. The simulation model is the same as the actual UHVDC system. The simulation results verify the effectiveness and feasibility of the strategy under different operating conditions. © 2020, High Voltage Engineering Editorial Department of CEPRI. All right reserved.

引用

页码：2780 / 2788

页数：8

共 20 条

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