220kV变电站35kV侧真空断路器开断并联电抗器过电压保护方案研究  

Study on overvoltage protection schemes for the 35kV vacuum circuit breakers switching off shunt reactors in 220kV substation

作　　者：彭发东 施纪栋[2] 喇元 程文锋 胡贤德[2] 周浩[2] 

机构地区：[1]广东电网电力科学研究院,广东广州510600 [2]浙江大学电气工程学院,浙江杭州310027

出　　处：《能源工程》2013年第6期13-16,20,共5页Energy Engineering

摘　　要：针对多次发生35 kV真空断路器开断并联电抗器引发过电压事故的某220 kV变电站,建立了基于ATP-EMTP的电磁暂态模型,介绍了三星型避雷器、组合式四星型避雷器和RC阻容吸收器这3种不同的保护装置,仿真分析计算了将这3种保护分别各自安装在35kV母线、断路器负荷侧和并联电抗器侧时的过电压。研究结果表明,三星型避雷器几乎无法限制相间过电压,组合式四星型避雷器对相间过电压有一定的限制作用,RC阻容吸收器对相间过电压的限制效果最好,而单独安装一种保护装置无法同时有效抑制各处的过电压。Based on a 220kV substation with frequently happening overvoltage accidents caused by operation of 35 kV vacuum circuit breakers switching off shunt reactors, an electric magnetic model using the ATP-EMTP program was built. The three-star arrester, four-star arrester and RC capacity-resistance absorber have been introduced and com- pared with the aid of simulation and analysis. Researches have been done on overvoltage accidents when protection de- vices have been installed on the 35kV bus, load side of the circuit breaker and the shunt reactor side. The results have demonstrated that three-star arrester has low efficiency in constraining phase-to-phase overvoltage. The four-star arrester was rather effective but not as good as the RC capacity-resistance absorber.

关 键 词：过电压 真空断路器 并联电抗器 避雷器 RC阻容吸收器 

分 类 号：TM761[电气工程—电力系统及自动化]