偏移特性阻抗继电器常用于小电流或大电流接地系统中作为输电线路距离保护的测量元件。
LZ-22 partial impedance relay usually used as measuring element on distance protection of the line at small or big current power system.
直流输电线路距离往往上千公里，线路越长、发生故障的概率越高，同时查找故障点的难度也越大。
The longer the lines are, the greater probability of line fault is, and the more difficult it will be to find the fault location.
在线路距离保护段范围发生故障时，利用对侧开关跳闸时序电流的突变量加速本侧保护的跳闸，改善了保护的性能。
This paper presents a novel approach to accelerated trip of power transmission lines by using biorthogonal wavelet transform to improve the performance of protection relays.
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