Shandong Province's first UHV substation expansion project successfully delivered power

People's Daily Online, Jinan, November 11th. In the early morning of the 11th, with the successful impact of the newly expanded 1000 kV transformer, the expansion project of the first UHV substation in Shandong Province, the Quancheng 1000 kV substation, was successfully powered on.

It is reported that the Quancheng 1000 kV substation is the hub substation of the province's ultra-high voltage power grid and an important clean energy channel for the national air pollution prevention and control plan. As the receiving substation of the Ximeng-Shandong UHV AC project, the station has delivered 38.76 billion kWh of clean energy from other provinces to Shandong since it was put into operation in 2016 to October 31, 2019. During the peak period of electricity load in winter and summer, the clean energy from other provinces delivered by the station effectively made up for the gap in Shandong's electricity load and alleviated the tense situation of electricity consumption.

The capacity expansion project of Quancheng Station includes 2 1000 kV transformers and 6 110 kV capacitor bays. The rated capacity of a single transformer is 3 million kilowatts. After commissioning, Quancheng Station will increase its external power transmission capacity by 6 million kilowatts, making it one of the largest UHV substations in the world. As an important project to ensure the smooth power transmission and operation of this expansion project, the UHV transformer system needs to undergo 6 commissioning tests, including 1000 kV side switching and 500 kV side switching. The operation lasted for 5 days, with more than 1,000 lean operations in total.

At the same time, this expansion project is also an important part of the Shandong-Hebei UHV AC ring network, which can optimize the grid structure, greatly enhance the ability of Shandong's UHV power grid to cope with complex environments, ensure the safe and stable operation of the power grid, and provide a stronger clean energy guarantee for the upcoming peak winter. (Guo Dong)