Abstract
Aiming at the three UHVDC controller model in the electromechanical simulation software BPA which widely used in China, the structural features were analyzed. By the time-domain simulation, the influence of different simulation models and the key controller parameters on the recovery characteristics of the receiving end power system were studied. Simulation results show that the commutation failure simulated method impacts the recovery characteristic significantly for weak power grids, increasing the voltage measurement time constant of constant dc power control module and enhancing the start voltage threshold of voltage dependent current order limit (VDCOL) can decrease the reactive power consumption of inverter during the disturbance, and can help to improve the recovery characteristic of receiving end power grid.
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