Voltage-sharing Configuration Method for Series Multi-break Mechanical Switches of ±500 kV Hybrid DC Circuit Breaker

被引：0
|
作者：
Huang D. [1 ]
Quan W. [1 ]
Wang X. [1 ]
Qiu Z. [1 ]
Yang Q. [1 ]
Li G. [1 ]
机构：
[1] School of Electrical Engineering and Automation, Wuhan University, Wuhan
来源：
Gaodianya Jishu/High Voltage Engineering | 2019年 / 45卷 / 08期
基金：
国家重点研发计划;
关键词：
DC circuit breaker; DC grid; Mechanical switch; Voltage-sharing component; Voltage-sharing design;
D O I：
10.13336/j.1003-6520.hve.20190731007
中图分类号：
学科分类号：
摘要：
High voltage DC circuit breaker is the key protection equipment for HVDC power grids. To meet the requirements of operating rapidity, the form of series multi-break is adopted in the high speed mechanical switch in the hybrid DC circuit breaker. Choosing appropriate voltage-sharing component parameters is an important guarantee for the mechanical switch to meet the requirements of static and dynamic voltage withstand property. However, little research is available in current literature at home and abroad. Taking the series six-break 550 kV high speed mechanical switch as an example, which is used in the ±500 kV hybrid DC circuit breaker in the Zhangbei four-terminal DC grid, we established a three-dimensional finite element model, and calculated the potential distribution and distributed capacitance parameters. Moreover, we analyzed the influence characteristics of the parameters of the RC components on the balance coefficient and other parameters, and summarized the configuration order and selection method of the voltage-sharing component parameters. The research shows that, when the voltage-sharing resistor is set to 100~1 000 MΩ, the grading capacitor is set to 7 nF, and the current limiting resistor is set to 100~150 Ω, the requirements of the voltage-sharing of the series six-break high speed mechanical switch can be met. The research results can provide guidance for the voltage sharing design of series multi-break mechanical switches in DC circuit breakers. © 2019, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：2410 / 2417
页数：7
相关论文
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