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Overall Scale of Power Grid

 

The national transmission capacity of power grids was further enhanced. By the end of 2017,the circuit length of transmission lines of 35kV and above reached 1.83 million kilometers, increased by 4.0% over the previous year; among which the circuit length of transmission lines of 220kV and above reached 690 thousand kilometer, increased by 6.2%.The capacity of substation of 35kV and above reached 6,600GVA,increased by 5.3% over the previous year; among which the capacity of substation equipments of 220kV and above reached 4,000GVA,increased by 9.1%.In 2017,major ultra-high voltage power grid projects were commissioned successively. As a result, the circuit length of transmission lines and the capacity of substation equipment surged considerably.

 

                           Circuit Length of Transmission Lines and the Capacity of Substation Equipments of 35kV and Above by the End of 2017

 

                                         

 

Trans-Regional Transmission

In 2017,the national capacity of trans-regional transmission was further boosted.Power grids in all regions within the country has been interconnected expect for Taiwan province.By the end of 2017,the overall capacity of trans-regional transmission reached 126.15GW,of which the trans-regional AC and DC transmission capacity reached 112.81GW,and trans-regional point-to-grid transmission capacity reached 13.34GW.

 

Interconnection between Mainland and Hong Kong and Macao, and between China and Neighboring Countries

 

By the end of 2017, mainland power grid was connected to power grids of Hong Kong Special Administrative Region (SAR) and Macao SAR, providing electricity for both regions. 

 

China has established transnational transmission interconnection and made electricity transactions with Russia, Mongolia, Vietnam, Myanmar, Laos.

 

The cross-border transmission capacity between China and neighboring countries such as Russia, Mongolia, Vietnam and Myanmar was preliminarily achieved.

 

 

Major Grid Companies in China
State Grid Corporation of China
China Southern Power Grid Co. Ltd.

 

 

 

 

 
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