配电网投切无功补偿装置的过电压与抑制分析  

Analysis on Overvoltage of Reactive Compensation Device and Its Suppression in Distribution Network

作　　者：庄琛[1] 姚圣平 陈少卿[2] 聂鸿宇 谢同平[1] 黄小琼[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044 [2]国网四川省电力公司电力科学研究院,四川成都610072

出　　处：《四川电力技术》2014年第2期48-51,74,共5页Sichuan Electric Power Technology

摘　　要：目前国内仍主要采用并联电容器组作为无功补偿装置,投切并联电容器组产生的操作过电压会威胁设备的安全运行。利用PSCAD/EMTDC软件对某变电站10 kV系统进行了仿真建模,对其投切无功补偿装置过程中可能出现的各种过电压特点进行了分析。并研究了串联电抗率的变化对过电压和涌流的影响与抑制,仿真结果表明,实际中改变串联电抗率对过电压的抑制效果并不明显,但对于涌流有较好的抑制作用。At present, shunt capacitor groups are the main devices of reactive compensation in domestic power system. The overvoltage generated by the switching operation will threaten the safety operation of equipment. The simulation modal of 10 kV substation system is established with PSCAD/EMTDC software, and several kinds of overvoltage characteristics generated in the process of switching operation of reactive compensation devices are analyzed. The focus is on the suppression effect on overvohage and inrush current related to different series reactance rates. The simulation results show that changing series reactance rate has not obvious effect on the overvoltage, but it has a significant reduction on overcurrent.

关 键 词：过电压 无功补偿 PSCAD EMTDC 并联电容器 串联电抗率 

分 类 号：TM864[电气工程—高电压与绝缘技术]