摘要
根据交流滤波器中电容器的常见接线方式和电容器损坏后的故障特征讲述了电容器不平衡保护的基本原理。对南方电网各直流输电工程中所实际采用的交流滤波器电容器不平衡保护的原理进行介绍,如桥差过流保护、比值不平衡保护和不平衡计数保护。由于在实际运行中电容器不平衡保护曾多次误动,结合实例重点分析了投入交流滤波器瞬间的涌流对保护的影响,以及采用POW装置、合理设置保护配合的改进措施。
Based on the familiar configuration and the typical fault characteristics of the capacitor used in AC filters,the principle of the unbalance current protection for AC filter is introduced.The unbalance current protection for capacitor of AC filter used in the HVDC system of CSG is discussed.The influence on the unbalance current protection caused by the inrush current at the moment of putting into operation of the AC filters and the improving measurements such as adopting POW equipment and setting protection coordination reasonably have been analyzed combined with the actual examples.All of these are valuable to the design of the protection and the maintenance and operation.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2010年第20期102-105,共4页
Power System Protection and Control
关键词
直流输电
交流滤波器
电容器
不平衡保护
涌流
HVDC
AC filter
capacitor
unbalance current protection
inrush current
