The first ultra-high voltage substation in Shandong Province- Ximeng-Shandong 1000kV Ultra-high voltage Quancheng Substation has been in operation for one year. State Grid Shandong Electric Power Company organized equipment suppliers for the initial maintenance works. Shandong Taikai Instrument Transformer Co.,Ltd sent special service personnel to inspect the electrical performance of all equipments in operation, all inspect indexes show that they are all in good condition, which guaranteed the operation safety for 1000kV Ultra-high voltage line.