At 17:02 on 29th March 2019, the initial grid-connection of unit 1 had just been accomplished.
At about 15 o'clock on 29th March, under the leadership of Manager. Meng and Nie, the operation personnel communicated and analyzed the running situation timely, monitored and operated on the DCS carefully. According to the instruction of commissioning personnel, our operation personnel put excitation system into service and step up the generator voltage to 15.75KV. At 16:10, main transformer successfully back-energized and the Unit was ready for GCB wattless synchronization test. After functional tests to all channels of synchronous device, the wattless synchronization test was successful performed after GCB closed. At 16:42, close GCB.
After getting the grid-connection permission from NGCP, our electrical engineer Shenguo Zhang operated to send synchronization order on DCS. At 17:02, GCB closed successfully and the first grid-connection succeeded. At that time, all persons there warmly applauded and cheered.
The success of this key milestone has contained the hardship of all personnel of our project, and laid a solid foundation of functional tests as well as reliable operation of Unit 1.