断路器短路关合过程数值分析模型及在选相关合中的应用  

Numerical Analysis Model of Short-circuit Making Process of Circuit-breaker and Its Application in Phase Selection Making

作　　者：李志新 吴限 苑婷 毛武平 LI Zhixin;WU Xian;YUAN Ting;MAO Wuping(State Grid Panjin Electric Power Supply Company,Liaoning Panjin 124000,China;Shenyang Jiayue Electric Power Technology Co.Ltd.,Shenyang 110000,China)

机构地区：[1]国网辽宁省电力有限公司盘锦供电公司,辽宁盘锦124000 [2]沈阳嘉越电力科技有限公司,沈阳110000

出　　处：《高压电器》2022年第10期180-187,共8页High Voltage Apparatus

基　　金：国网辽宁电力有限公司科技项目(2021YF-32)。

摘　　要：合理控制高压断路器的关合和开断时刻可以在一定程度上降低系统中的暂态过程,选相关合和开断一直是高压断路器在工程应用中的关注点。文中通过等效电路建立了高压交流断路器不同期短路关合过程计算的数值分析模型,可以计算得到任意时刻的全电流、断口电压、交流分量电流和直流分量电流。通过验算国家标准GB/T 30846—2014第4.102规定的短路关合峰值系数验证了计算模型的正确性,并计算了中性点有效接地系统不同期短路关合的峰值系数。最后,应用两个算例分析与讨论了中性点有效接地系统和非有效接地系统中断路器的选相关合技术,结果表明:经过选相关合技术可以有效降低短路电流的峰值系数及直流分量。Reasonable control of the closing and breaking time of high voltage circuit-breaker can,to a certain extent,reduce the transient process in the system. Phase selection making and breaking have always been the focus of high-voltage circuit-breakers in engineering application. In this paper,a numerical analysis model for the calculation of asynchronous short-circuit making process of high voltage AC circuit breaker is set up through equivalent circuit and the full current,voltage across open contact,AC component current and DC component current at any time can be calculated and obtained. The correctness of the calculation model is verified by calculating the short circuit making peak coefficient specified in clause 4.102 of the China National Standard GB/T 30846—2014,and the peak factor of asynchronous short circuit making of effectively neutral grounding systems is calculated. Finally,two examples are used to analyze and discuss the phase selection making technology of circuit-breakers in neutral point effective grounding system and non effective grounding system. The results show that the peak coefficient and DC component of short circuit current can be effectively reduced by using phase selection making technology.

关 键 词：断路器 选相关合 峰值系数 有效接地系统 非有效接地系统 

分 类 号：TM561[电气工程—电器]