China Southern Power Grid (CSG) is a key State-owned enterprise under the direct supervision of the State-owned Assets Supervision and Administration Commission (SASAC) of the State Council. The company is responsible for the investment, construction, and operation of power grids in southern China, as well as participating in the development and operation of inter-regional transmission projects. It provides reliable power supply services to Guangdong, Guangxi, Yunnan, Guizhou, and Hainan provinces/regions, as well as the Hong Kong and Macao SARs. CSG also engages in electricity trading and dispatch, domestic and overseas investment and financing, foreign trade and logistics, international cooperation, overseas engineering contracting, and labor cooperation.

CSG headquarters has 20 functional departments and 3 directly affiliated institutions: the General Dispatch and Control Center, Logistics Management Center, and Annuity Center. It operates 3 branches: EHV Power Transmission Company, CSG Party School (Leadership Learning Academy and Training Center), and CSG Beijing Company. CSG owns 14 wholly-owned subsidiaries, including the grid corporation of Guangdong, Guangxi, Yunnan, Guizhou, and Hainan, as well as CSG Shenzhen Power Supply Co., Ltd., Power Generation Co., Ltd., CSG Industrial Investment Group, Southern Dingyuan Assets Operation Co., Ltd., CSG Capital Holdings Co., Ltd., CSG International Co., Ltd., CSG Digital Power Grid Research Institute Co., Ltd., CSG Material Company Co., Ltd., and CSG Energy Development Research Institute Co., Ltd. In addition, it controls 7 holding subsidiaries: CSG Energy Storage Co., Ltd., CSG Finance Co., Ltd., Dinghe Property Insurance Co., Ltd., CSG Yunnan International Co., Ltd., CSG Electric Power Research Institute, Guangzhou Power Exchange Center Co., Ltd., CSG Digital Media Technology Co., Ltd. The company employs nearly 300,000 people.

Basic Information on CSG

CSG covers five provincial-level regions and is interconnected with the power grids of Hong Kong, Macao, and Southeast Asian countries, serving an area of 1 million square kilometers. It provides electricity to a population of 254 million and supplies power to 96.7 million customers. In 2020, the maximum load on the unified dispatching grid reached 199.8 million kW, a 7.0% increase. The total electricity consumption across the five provincial regions was 1.3056 trillion kWh, growing by 5.0%.

Spanning nearly 2,000 kilometers from east to west, the grid incorporates a variety of energy sources, including hydro, coal, nuclear, pumped storage, oil, gas, and wind power. By the end of 2020, the total installed capacity reached 350 million kW, consisting of 150 million kW from thermal power, 120 million kW from hydropower, 19.61 million kW from nuclear power, 26.18 million kW from wind power, and 22.41 million kW from solar PV—accounting for 43.4%, 33.2%, 5.6%, 7.5%, and 6.4% respectively. The total substation capacity at 110 kV and above was 1.12 billion kVA, with a total transmission line length of 248,000 kilometers. By the end of 2020, non-fossil energy accounted for 53.2% of the electricity generated. CSG features an AC-DC hybrid network, long-distance, high-capacity, ultra-high-voltage transmission systems with complex and challenging stability characteristics, and high technological requirements. The company possesses core technologies in UHVDC, flexible DC transmission, large power grid security and stability control, energy-saving operation, large-capacity energy storage, and superconductivity. It built and operates the world’s first ±800 kV UHVDC transmission project, which won the Special Prize of the State Science and Technology Progress Award, marking the company’s world-leading status in the UHVDC transmission field. At present, the West-to-East Power Transmission Project comprises 19 major transmission corridors rated 500 kV and above, including eight AC and eleven DC lines: four 500 kV Tian-Guang AC lines, four Gui-Guang AC lines, ±500 kV Tian-Guang DC, Jiangcheng DC, Gaozhao DC, Xing’an DC, double-circuit Niuchong DC, Jinzhong DC, and ±800 kV UHVDC lines such as Chu-Sui, Puqiao, Xindong, and Kun-Liu-Long. The total power delivery capacity exceeds 58 million kW.

CSG is a pioneer among domestic grid companies in internationalization. The company actively implements the Belt and Road Initiative and, as the designated Chinese implementing agency for the Greater Mekong Subregion power cooperation, continuously promotes interconnection with neighboring countries and deepens international cooperation in electricity. By the end of 2020, the company had delivered a cumulative 39.49 billion kWh of electricity to Vietnam, 1.15 billion kWh to Laos, purchased 19.91 billion kWh from Myanmar, and delivered 1.36 billion kWh to Myanmar.