摘要
串联电抗器是无功补偿电容器中重要的组成部分,串抗率选择不当,可能会使电容器组与系统发生谐振,影响设备的安全和系统的稳定。通过对某一变电站进行电力电容器投切试验和现场测试,得出无功补偿电容器组串联电抗器的参数不匹配是引起该案例中电容器熔丝群爆的直接原因。提出在有限流电抗器的情况下,电容器的设计除了选择合适的串抗率外,还应考虑电容器组等效串抗率,并结合现场实际情况,给出了相应的解决措施。同时分析了电容器组在不同串抗率的情况下,并联补偿支路各次谐波的情况。
Series reactor is the important part of the reactive power compensation capacitor,the series reactance rate improperly selected may cause the resonance between the capacitor and the system,affecting the safety of equipment and the system stability. The power capacitor switching operation and field test in a substation indicate the mismatching of reactor parameters leads directly to the capacitor fuse explosion. If the current limiting reactor is equipped,not only the appropriate series reactance rate should be selected, but also the equivalent series reactance rate of capacitor bank considered. The corresponding solutions are given according to site situations and the harmonics of shunt compensating branch are analyzed for different series reactance rates of capacitor bank.
出处
《电力自动化设备》
EI
CSCD
北大核心
2012年第4期145-150,共6页
Electric Power Automation Equipment
关键词
电抗器
谐波分析
电抗率
熔丝群爆
测试
补偿
电容器
设计
electric reactors
harmonic analysis
reactance rate
fuse explosions
testing
compensation
capacitors
design
