Construction of No. 3 main transformer expansion project of 1000 kV Jingmen UHV Station starts

China News Service, Jingmen, Hubei, September 23 (He Junhui, Li Yijia, Yu Zhe) The No. 3 main transformer expansion project of the 1,000 kV Jingmen UHV Station started on the 22nd. This is the first UHV expansion project started in Hubei Province's "15th Five-Year Plan". It marks the Jingmen Station moving from the "terminal station" of my country's first UHV AC test demonstration project to a new stage of the "energy hub" of the Central China Power Grid. The project is scheduled to be completed and put into operation in October 2027, and will include a new set of 3,000 MVA main transformers.

Jingmen UHV Station is the terminal station of my country's first commercially operated UHV AC project - the Southeast Shanxi to Nanyang to Jingmen project. At the end of 2022, with the gradual completion of the "Sun"-shaped UHV AC ring network in Central China, the station's strategic positioning has undergone a historic change: it is no longer a single-structure transmission terminal station, but has been upgraded to a ring network core hub station connecting the North China Power Grid and the provinces in central China. It undertakes multiple functions such as water and fire mutual assistance, peak shifting and peak regulation, new energy consumption, and inter-provincial power trading.

"The previous expansions were mainly about 'connecting lines' to connect Jingmen Station to more places. This time is different, this time it is about 'strengthening the heart.'" Yang Bing, deputy director of the 1,000 kV Jingmen UHV Station of the State Grid Hubei Super League Company, said that after adding the main transformer capacity, Jingmen Station The power flow regulation capacity of the gate station will be greatly improved. "Henan's surplus power can be sent to Hubei, and Hubei can transfer it from North China during peak power consumption. It can absorb it when new energy is booming, and can withstand load peaks. It has transformed from a substation into a regional power energy hub."

This phase of the expansion project will add a set of 3,000 MVA main transformers and related low-voltage supporting equipment, which will not only increase capacity, but also achieve a functional leap. It will effectively respond to new challenges such as the increased demand for inter-provincial mutual aid in power in central China, large-scale access to new energy, and the acceleration of market-based inter-provincial and inter-regional power transactions.

Tang Zhengsen, director of the project management department of the State Grid Hubei Super League Company, said that the Jingmen station expansion, together with the two UHV DC channels for "foreign power entering Hubei" from Jinsha River to Hubei and Shaanbei to Hubei, as well as the remaining nodes of the Central China UHV AC ring network, form an integrated energy grid.

According to reports, the project is expected to be completed and put into operation in October 2027. By then, the power flow adjustment capability of the 1,000 kV Jingmen UHV Station will be greatly enhanced, the layout of the UHV grid in Central China will be further improved, a multi-energy resource optimization and allocation platform that complements wind, solar, water, and fire will be accelerated, and the power supply bottleneck in the Three Gorges area is expected to be solved.