宁夏电网35kV电容器组关合涌流计算与仿真分析  

Calculation and simulation analysis of closing surge currents in 35 kV capacitor banks in the Ningxia power grid

作　　者：马飞越 马青 崔巍 买波 MA Feiyue;MA Qing;CUI Wei;MAI Bo(Electric Power Research Institute,State Grid Ningxia Electric Power Co.,Ltd.,Yinchuan Ningxia 750011,China;Ningxia Electric Power Energy Technology Co.,Ltd.,Yinchuan Ningxia 750011,China;State Grid Ningxia Electric Power Co.,Ltd.,Yinchuan Ningxia 750001,China)

机构地区：[1]国网宁夏电力有限公司电力科学研究院,宁夏银川750011 [2]宁夏电力能源科技有限公司,宁夏银川750011 [3]国网宁夏电力有限公司,宁夏银川750001

出　　处：《宁夏电力》2024年第4期41-48,共8页Ningxia Electric Power

基　　金：宁夏回族自治区自然科学基金项目(2023AAC03847);宁夏回族自治区重点研发项目(2022BDE93011)。

摘　　要：随着宁夏电网新型电力系统建设的不断推进,新能源及新型用能负荷的特性对无功补偿需求更加迫切,而作为变电站无功补偿中最经济的并联电容组因投切用真空断路器及SF_6断路器受高频涌流影响,难以满足频繁投切要求,一定程度制约了供电电压质量提升。从宁夏电网35 kV电容器组配置特点出发,分析变电站通用典型设计后对电容器关合涌流的影响,开展关合涌流简化计算方法及仿真分析研究。实例计算及仿真结果表明,在单个电容器组及背靠背电容器组关合两种方式下,采用简化计算涌流峰值及仿真计算方式偏差分别在10%及20%以内,简化计算方法及仿真模型可为电容器投切开关选型和涌流影响下设备健康评估提供依据。As the construction of the new power system advances in the Ningxia power grid,there is an increasing urgency for reactive power compensation due to the characteristics of new energy and new energy loads.The parallel capacitor bank,as the most economical solution for substation reactive power compensation,faces challenges with frequent switching requirements due to high-frequency surge currents affecting vacuum and SF 6 circuit breakers,limiting improvements in power supply voltage quality.This paper examines the configuration characteristics of 35 kV capacitor banks in the Ningxia power grid and analyzes the impact of typical substation designs on capacitor closing surge currents.It presents a simplified calculation method and simulation analysis for these surge currents.Case calculations and simulation results show that the deviation between the simplified calculation of peak surge current and simulation calculation method is within 10%/20%,providing a basis for selecting capacitor switching devices and assessing equipment health under the influence of surge currents.

关 键 词：电容器 真空断路器 关合 涌流 仿真分析 

分 类 号：TM835[电气工程—高电压与绝缘技术]