Scheme and Operation Characteristic Analysis of Large Sending Terminal DC Grid Based on Flexible DC in West China

Renewable energy will play an important role in the future energy development of West China. Voltage source converter based on high voltage direct current (VSC-HVDC) has a strong regulation capability of voltage and power, and can be interconnected with weak AC grid or even passive grid. A ± 1000kV large west sending terminal DC power grid based on VSC-HVDC is constructed, by which with rich distributed resources in West China can be centrally dispatched to East China, avoiding the uncertainty impact of renewable energy power generation on power system stability. Steady and transient characteristics of the sending terminal DC grid are simulated and analyzed.