Three Gorges underground power station put into production to enter the countdown

On December 15th, the rotor of the No. 32 generating unit of the Three Gorges Underground Power Station was hoisted into place and became the first underground power station to complete the installation of the rotor. This marks the countdown period for the underground power station to start production.

The large volume and weight of the rotor is one of the most important components of the Three Gorges hydro-generating unit. It is difficult to manufacture and install. The 32th unit that was hoisted had a rotor diameter of 18.7 meters, a height of 3.4 meters, and a weight of 1971 tons. It consisted of a rotor center body, a 16-segmented fan-shaped bracket, more than 30,000 magnetic yoke punching chips, and 80 magnetic poles. Manufactured by Harbin Electric Machinery Factory, Gezhouba Mechanical and Electrical Construction Co., Ltd. Sanxia Underground Power Station Mechanical and Electrical Installation Project Department is under construction, installation and construction.

The No.32 generating unit is the first 700,000-kw unit that entered the Three Gorges underground power station and is the fastest installed unit of the underground power station in the Three Gorges area. The Three Gorges Underground Power Station has a total of 6 sets (27-32) 700,000 kilowatts installed with a total installed capacity of 4.2 million kilowatts, which are designed by Harbin Electric, Dongfang Electric and Tianjin ALSTOM. Among them, the cooling system of Dongfang Electric's 700,000-kilowatt generator stator adopts evaporative cooling technology for the first time, which is different from the water cooling and air-cooling technologies of the left and right bank units of the Three Gorges.

At present, the underground part of the underground power station has already been demolished. The reclamation is now filled with water to prepare for the demolition of the underwater part in April next year. The power station plans to complete the commissioning and commissioning of the two units by June 30, 2011. Before the end of 2012, six units of underground power stations will be put into production and become effective supplements to the 26 units on the left and right banks of the Three Gorges Dam. By then, the total installed capacity of the Three Gorges Power Station will reach 22.5 million kilowatts, and the annual maximum generating capacity will be 100 billion kwh.