马迹塘水电厂电气二次屏柜等电位接地改造

Equipotential Grounding Retrofit of Electrical Secondary Screen Cabinet of Majitang Hydropower Plant

马迹塘电厂接地网系统为建厂初期建设,所有设备的保护接地、工作接地以及电源零线等均接入该接地网系统,未建立单独的等电位接地网。电气二次屏柜等电位接地,包括开关站、主厂房、中控室及二次屏柜等电位接地反措。结合电厂现场实际情况进行了整改,现已稳定运行1a,取得良好效果。

The ground network system of Majitang Power Plant is the initial construction of the plant.Protective grounding,working grounding and power zero line of all equipment are connected to this grounding network system,and no separate equipotential grounding network is established.Electrical secondary screen cabinet is equipotentially grounded,and switching station,main power house,central control room and secondary screen cabinet are equipotentially grounded.The modification has been carried out in combination with the actual situation on site of the power plant.It has been operated stably for one year and achieved good results.