Mianyang South Substation is a 500kV substation located in Mianyang, Sichuan, China. The construction works on Mianyang South Substation began in 2019. The project was commissioned in 2021.


The Mianyang South Substation project is a new substation being operated by State Grid Corporation of China.

The designed voltage level of the project is 500kV, while the operating voltage level is 500kV. The step-in voltage of the substation is 500kV.

Mianyang South Substation has received approval from State Electricity Regulatory Commission to undertake the works on the project.

Contractors involved

Southwest Electric Power Design Institute and State Grid Corporation of China was appointed by State Grid Corporation of China to undertake design and construction works of the Mianyang South Substation.

About State Grid Corporation of China

State Grid Corporation of China (SGCC) is a state-owned electric utility. The utility builds and operates power grids, and distributes and transmits electricity. The utility offers energy efficient home appliances air conditioner, fan, TV set, washing machine, microwave oven, refrigerator, electric water heater and computer to save energy. It provides energy conservation, energy audits, energy management, energy saving tips and energy consultation services. SGCC’s projects include Jindongnan Nanyang-Jingmen UHV AC Pilot Project, Xiangjiaba-Shanghai UHV DC Transmission Pilot Project, Qinghai-Tibet Grid Interconnection Project, and others.


All publicly-announced T&D Line & Substation projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects is sourced through secondary information sources such as country specific utility players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.