MOV并联单元数变化对串补装置的影响  

Influence of MOV Parallel Units Number Change on the Series Compensator

作　　者：杨尚瑾 金雪芬 王媛媛 彭珑 马鑫晟 YANG Shangjin;JIN Xuefen;WANG Yuanyuan;PENG Long;MA Xinsheng(NARI Group Corporation (State Grid Electric Power Research Institute),Nanjing 211006,China;China EPRI Science & Technology Co.,Ltd.,Beijing 102200,China;State Grid Jibei Electric Power Research Institute,Beijing 100045,China)

机构地区：[1]南瑞集团(国网电力科学研究院)有限公司,南京211006 [2]中电普瑞科技有限公司,北京102200 [3]国网冀北电力有限公司电力科学研究院,北京100045

出　　处：《电力电容器与无功补偿》2019年第5期25-30,共6页Power Capacitor & Reactive Power Compensation

摘　　要：为保护电容器组,串联补偿(简称"串补")装置一般会配置金属氧化物限压器(metal oxide varistor,MOV)。串补运行过程中,MOV单元可能损坏,如果在备用单元损坏的基础上,又有MOV单元减少,可能会危害串补的安全稳定运行。本文结合神保串补工程,分析了MOV并联单元减少对串补装置的影响,具体包括以下几个方面:摇摆电流下MOV可靠性;现有MOV电流及能耗保护定值的适用性;串补装置保护水平;MOV容量配置合理性;电容器组放电过程中装置可靠性。本文得出了相应的分析结果,并给出了应对策略。In order to protect the capacitor bank,metal oxide varistor(MOV)is commonly used in series compensation. During the operation of series compensation,the MOV units may be damaged. If there is a reduction in the number of MOV units on the basis of damage to the backup unit,it may affect the safe operation of the series compensation. In this paper,the effect of the reduction of MOV units on the series compensator is analyzed,including the following aspects:MOV reliability under swing current;the applicability of MOV current and energy protection setting values;protective level of series compensator. rationality of MOV capacity configuration;the reliability of the devices during the discharge process of the capacitor bank.Inthispaper,the corresponding analysis results are obtained,and the countermeasures are given.

关 键 词：串联补偿 电容器 金属氧化物限压器(MOV) 并联单元 

分 类 号：TM761.12[电气工程—电力系统及自动化]