摘要
自动调谐消弧线圈实现了电网电容电流测量的自动化以及单相接地故障的自动跟踪补偿,提高了电网运行的安全性和供电可靠性,却给电网的单相接地故障选线带来很大的困难。在简要分析谐波电流、零序有功、零序对地导纳以及信号注入等选线方法优缺点的基础上,针对自动补偿电网的运行特点,改进了零序对地导纳的计算方法,研究了新的选线原理,提高了该选线方法的准确性和适用范围。仿真分析结果说明了结论的正确性。
Automatic tuning extinction coil realizes automatic measurement for capacitance current of power network and automatic tracking compensation for single-phase earth fault, which enhances the security of network operation and the reliability of power supply, but brings much difficulty to single-phase earth fault line selection. Based on brief analysis of harmonic current, zero sequence active power,zero sequence phase-to-ground admittance and signal injection,and with the operation characteristic of auto-compensated distribution network, this paper improves the calculation method of zero sequence phase-to-ground admittance and explores a new principle for fault line selection, which strengthens the accuracy and the suitable range of fault line selection with zero sequence phase-to-ground admittance. The result of simulation analysis shows the correctness of the conclusion.
出处
《继电器》
CSCD
北大核心
2005年第5期27-31,37,共6页
Relay
关键词
自动补偿电网
零序对地导纳
消弧线圈
auto-compensated distribution network
zero sequence phase-to-ground admittance
extinction coil
