电力系统谐波对继电保护的影响

随着电力系统的迅速发展和新型电气设备的出现，电力系统的谐波问题日趋严重，新型的继电保护设备，特别是微机保护在电力系统中被大量采用，电力系统谐波对继电保护的影响，需要给予足够的重视，通过对电力系统 的分析，从多个方面讨论了谐波对电力系统继电保护设备的影响，结合电网的实际情况及出现的问题，对电力系统中多种常用的继电保护设备进行了理论分析和现场试验，对谐波含量较高系统中继电保护设备的日常运行和维护提出了相应的建议。加强对设备运行的监视，在软，硬件采用一定的手段提高干扰水平，并在整定计算中适当加以考虑。

Interference with relaying protection from harmonic of power system

The harmonic pollution in power system becomes more serious along with the rapid development of power system and the appearance of novel electric devices.The novel protective devices,especially the microcomputer protections are widely used in system.The interference with relaying protecion from the harmonic of power system should be paid more attention.Based on the harmonic analysis of power system,its interference with the protective equipment is discussed.With the consideration of the actual conditions and problems occurred in power system,several common-used relaying protections are theoretically analyzed and examined on site.The corresponding suggestions for the daily operation and maintenance of relaying protections in power systems with serious harmonic pollution are presented.Strengthen operation supervision,apply countermeasures in both HW and SW of protective equipment and take account of it carefully in setting calculation.