Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

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基于开关电容器组的高压断路器操动控制研究

来源:电工电气发布时间:2020-09-18 16:18 浏览次数:65
基于开关电容器组的高压断路器操动控制研究
 
韩东鹏,徐建源,庚振新,刘洋,张世维
(沈阳工业大学 电气工程学院,辽宁 沈阳 110870)
 
    摘 要:为了减小断路器分合闸操作中电机操动机构驱动电机启动的响应时间,提高断路器的分合闸速度并改善断路器的触头震荡现象,提出了应用于电机操动机构的控制系统内储能电容的升压变换器技术。针对126 kV真空断路器分合闸的技术要求,采用开关电容器组作为升压装置,利用电容器切换技术改变断路器进行分合闸操作的能量存储和释放方式,对断路器动触头的运动过程进行分段控制。在开关电容器组和普通储能电容器的条件下,进行了126 kV真空断路器电动机操动机构的分合闸试验。实验结果验证,与采用普通储能电容的分合闸特性实验相比较,采用基于开关电容器组的电机控制系统可以有效地提高断路器的分闸和合闸速度,并改善断路器的触点弹跳。
    关键词:开关电容器组;真空断路器;控制系统;分合闸时间
    中图分类号:TM53;TM561     文献标识码:A     文章编号:1007-3175(2020)09-0008-05
 
Research on Operation Control of High Voltage Circuit Breaker Based on Switched Capacitor Bank
 
HAN Dong-peng, XU Jian-yuan, GENG Zhen-xin, LIU Yang, ZHANG Shi-wei
(School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China)
 
    Abstract: In order to reduce the response time of the motor operating mechanism driving the motor in the opening and closing operation of the circuit breaker, increase the opening and closing speed of the circuit breaker and improve the contact oscillation of the circuit breaker. This paper proposes a boost converter technology using energy storage capacitors in the control system of the motor operating mechanism. Aiming at the technical requirements for opening and closing of the 126 kV vacuum circuit breaker, a switched capacitor bank is used as a boost device, and the capacitor switching technology is used to change the energy storage and release mode of the circuit breaker for opening and closing operations, and to control the movement process of the moving contact of the circuit breaker in sections.In this paper, under the condition of the switched capacitor bank and the ordinary energy storage capacitor, the opening and closing experiment of the motor operating mechanism of the 126 kV vacuum circuit breaker is carried out. The experimental results certificate that, comparing with the experiment of opening and closing characteristics using ordinary energy storage capacitors, the motor control system based on the switched capacitor bank can effectively speed up the opening and closing rate of the circuit breaker. In addition, it can improve the contact bounce of the circuit breaker.
    Key words: switched capacitor bank; vacuum circuit breaker; control system; opening and closing time
 
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