摘要
并联电容补偿(简称并补)装置是电气化铁路供电系统的重要设备。针对其串联电抗器缺乏必要保护,尤其是匝间故障保护性能的缺陷,基于对电抗器匝间故障和阻抗特性的分析,结合电气化铁路供电系统的特殊性,提出并补装置电抗器的新匝间短路保护。同时简要分析了傅里叶算法计算电抗器测量阻抗受并补暂态过程影响原因,通过均值滤波单元得以减轻影响。Matlab仿真表明阻抗保护能够对匝间故障做出正确判断。
Shunt capacitors are the important device of power system in electrified railway. The serial reactor on it is short of necessary protection, especially the one against inter-turn fault. Based on the analysis of this kind of fault and its impedance characteristic, together with the particularity of power system in electrified railway, a new protection against inter-turn fault is proposed. The impedance counted with FFT is affected due to the transient response of shunt capacitors. The affection is alleviated through wave filter. The simulation by Matlab shows that the impedance protection can make correct judgement to this kind of fault.
出处
《电气应用》
北大核心
2007年第12期54-57,共4页
Electrotechnical Application
