Power grid interconnection through UHV power transmission lines optimizes the resource allocation across a wider spectrum and increases the power supply to the receiving-terminal load centers in the eastern region.
Ultra-high-voltage electricity transmission (UHV electricity transmission) has been used in China since 2009 to transmit both alternating current (AC) and direct current (DC) electricity over long distances separating China's energy resources and consumers.
The UHV grid will aid China's plan of electrification and decarbonization, and enable integration of renewable energy by removing the transmission bottleneck that is currently limiting expansions in wind and solar generation capacity whilst further developing the market for long-range electric vehicles in China.
In January 2023, the National Energy Administration released the “Blueprint for the Development of New Power Systems (Draft for Comments)”, designating several UHV projects as key components in developing new power systems.
Ultra-high voltage (UHV) refers to power transmission lines operating at voltages greater than 800 kilovolts (kV). The such high-voltage operation has a high capacity and manages to transmit electricity over long distances with minimal power loss.
UHV power transmission effectively solved the disparity between energy availability in western China and demand in eastern China. Furthermore, UHV power transmission improves environmental quality by transmitting energy generated from renewable energy sources to load centers .