风力发电场35 kV小电阻接地系统继电保护误动原因分析及改进策略

Cause Analysis and Improvement Strategy of Relay Protection Misoperation of 35 kV Low Resistance Grounding System in Wind Farm

风力发电机组安装容量日趋增大,风力发电场的输变电设备越来越多,风力发电场的安全稳定运行成为风电场运营管理的重点关注问题之一,风力发电场内的集电线路因自身设备及遭外力破坏等原因出现的故障情况已屡见不鲜。文章就风力发电场35 kV系统接地变压器继电保护误动的原因进行分析,并提出改进策略。

The installed capacity of wind turbines is increasing,and there are more and more power transmission and transformation equipment in wind farms.The safe and stable operation of wind farms is one of the key concerns of wind farm operation and management.It is not uncommon for the collection lines in wind farms to be damaged by external forces due to their own equipment.The causes of relay protection misoperation of 35 kV system grounding transformer in wind power plant were analyzed,and the improvement strategy was put forward.