A coordinated control strategy for frequency stability of wind power transmission system through DC outgoing transmission

In view of the frequency instability caused by the high proportion of wind power in the transmission grid of the new energy power system, the stability of the system is faced with severe challenges. Firstly, the topological structure of HVDC (High Voltage Direct Current) transmission system is introduced, and the frequency dynamic response model and frequency demand of new energy power system are analyzed. Then, a coordinated control strategy is proposed. By adding deviation control, pitch Angle fitting control and additional power control to the fan at different speeds, and optimizing the DC (Direct Current) command link, the frequency fluctuation of the feed section is effectively suppressed when the system is disturbed. At the same time, the relevant parameters of the control strategy are adjusted, and the simulation model of the wind power transmission system through DC is built based on PSCAD/EMTDC to verify the effectiveness of the strategy.