Test and simulation research of security and stability control technology of UHVDC based on real-time digital simulation

The RTDS simulation models for Lingzhou to Shaoxing(Lingshao) ±800kV UHVDC transmission system are set up, meanwhile, through simulating the 3-level functions of the master control, pole control, and valve control, the real-time digital simulation research and closed loop testing platform for the security and stability control devices is built, without access to actual UHVDC control and protection system, which saves the testing cost and time. Based on the research and testing platform, the security and stability control strategies for AC and DC system of the Lingshao UHVDC system are tested, which in the end verifies the correctness of the control strategies and the accuracy of the simulation models.