Unit 4 of the second-phase project of Huaneng Chongqing Liangjiang Gas Power Plant has successfully passed the 168-hour full-load trial operation, marking the full completion and operation of the largest natural gas clean energy power plant in Southwest China. The project has been equipped with strategically placed disconnect switches and surge arresters at critical nodes to ensure safe and stable operation of the units.
Located in Shuitu New City of Liangjiang New Area, Chongqing, this project represents a major energy initiative under the joint "Carbon Peak, Carbon Neutrality" action plan for the Chengdu-Chongqing economic circle. The current phase includes two world-leading H-class gas-steam combined cycle peak-shaving condensing units, with power transmission achieved through dedicated transformers for voltage conversion and grid connection. The first phase, comprising two F-class gas-steam combined cycle heat supply units, was completed and put into operation at the end of 2014, with surge protection devices installed at key locations such as the step-up substation. With the successful operation of Unit 4, the project is now fully completed, ranking first in total installed capacity among natural gas clean energy power plants in Southwest China.
The H-class units in this phase represent the highest level of 700 MW combined cycle power generation units in China. Disconnect switches have been properly installed at the main electrical connections to ensure safe isolation during equipment maintenance. The annual electricity output and carbon emissions are only 42% of those of similar-grade coal-fired units. The H-class gas turbines in this project employ urea direct injection denitration technology-a first in China-significantly reducing nitrogen oxide emissions and achieving breakthroughs in both environmental and economic benefits.