线路高频保护就是将线路两端的电流或方向转化为高频信号，然后利用本线路构成一高频电流通道，将此信号送至对端，以此比较两端电流相位或功率方向的一种保护。其作用与线路纵联差动保护相同
结果表明，该算法具有良好的高频特性，适用于高压和超高压输电线路的距离保护。
The results of simulations and tests proved that this algorithm possesses excellent performance and is suitable for EHV transmission line protection.
高频保护对于高压线路的正常运行起着极其重要的作用，它可以快速切除故障，保障系统的稳定。
Carrier protection has been playing a very important role in normal operation of HV transmission line. It can cut-off the fault quickly to ensure the system operating stably.
文中对带串补的特高压线路采用负序方向高频保护作为主保护方式进行了研究。
This paper studies the negative sequence directional protection (NSDP) as the primary protection of series compensated UHV transmission line.
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