Upon completion of the expansion, the Hengmen power plant will be the largest gas-fired power plant in China, CNOOC said.
Investment required to carry out expansions works at the plant are estimated to total 4.5 billion yuan renmimbi (US$ 0.711231 billion).
The Hengmen plant, located in Zhongshan City in South China's Guangdong province, is operated by a Zhongshan Jiaming Electric Power, a joint venture (JV) controlled by the CNOOC Gas and Power Group.
Zhongshan Jiaming Electric Power is currently in the process of building three 390 MW gas-steam combined cycle cogeneration power generation units with a view to expanding capacity at the plant.
CNOOC Gas and Power Group took a controlling stake of 52.7% stake in Zhongshan Jiaming Electric Power in 1994.