摘要
针对目前运行的自动消弧线圈不能识别接地故障,导致拒动、误动、残流过大等问题,对中性点电压在瞬时性接地、低阻接地、高阻接地等情况下的取值范围进行了推导计算,对能够识别的高阻接地的取值勤范围亦进行了推导计算,并通过仿真验证了推导的正确性。据此对自动消弧线圈进行了改造。
Based on the problems such as refusing compensation, mistaken compensation or oversize residual current, which is because the currently running automatic arc-suppression coils can not recognize the grounding fault. The neutral point voltage ranges in the case of instantaneous grounding, low-resistance grounding, and high-resistance grounding are derived. And the recognizable resistance range in the case of high-resistance grounding is also derived, and the validity of the derivations is verified by the simulations. According the derivations, the automatic arc-suppression coil is improved, some new functions such as grounding fault identification and intelligent compensation control are added, which effectively solved the existing problem of arc-suppression coil and improved the overall performance of arc-suppression coil. A simulated high-voltage network is built in the laboratory, and different types of single-phase grounding fault test are carried out on the improved automatic arc- suppression coil, the tests results show that the methods are satisfied and worth of further promoting.
出处
《电瓷避雷器》
CAS
北大核心
2014年第2期66-70,76,共6页
Insulators and Surge Arresters
基金
中山市科技计划项目(编号:20123A346)
关键词
配电网
消弧线圈
单相接地故障识别
智能补偿控制
distribution network
arc-suppression coil
single-phase grounding fault identification
intelligent compensation
control
