Research on Security and Stability Risks and Control Measures of HVDC Dense Channels under Extreme Weather

In order to reduce the adverse impact of multiple faults of dense channels on power grid under extreme weather, this article summarizes the HVDC dense channels in a specific region and analyzes the risk of various natural disasters to the dense channels. Typical combination faults are classified and screened out. Through simulation and calculation, the problem of power flow evacuation and transient instability caused by typical faults are analyzed. Corresponding measures are proposed, such as system operation enhancement, automatic control optimization, and network development planning, as references for AC and DC parallel grid.