摘要
电力系统中的接地网对保障电网安全运行和变电站的设备安全有非常重要的作用。由于我国主要以扁钢作为接地网材质,并且接地网深埋在地下,因此很容易受到腐蚀而发生故障,从而给电网运行带来安全隐患。基于电磁感应原理,通过给地网注入高频大电流,测量由地网激发的磁感应强度,分析比较正常情况下磁感应强度与实际测量磁感应强度分布,从而测得地网故障。最后通过仿真试验验证了该方法的可行性。
Grounding network of power system plays an important role in guaranteeing the power grid safe operation and substation equipment safety.In China grounding network,mainly made of flat steel and buried deep in the ground,is susceptible to corrosion and failures,therefore potential safety hazard in the power grid operation.Based on electromagnetic induction theory,measure magnetic induction intensity of ground excitation through transmitting high frequency large current,compare normal magnetic induction intensity distribution with the actual measurement,and accordingly test grounding network fault.Finally,the feasibility of this method is verified by simulation experiment.
出处
《电力与能源》
2015年第5期670-672,共3页
Power & Energy
关键词
接地网
电磁感应
故障诊断
grounding network
electromagnetic induction
fault diagnosis
