Research on wind-hydro-thermal Power System Multi-time Scale Coordinated Optimal Dispatch

To deal with the global climate change and serious energy crisis, the renewable energy, especially wind power has been developed rapidly in power system. Since the conventional power dispatch technology cannot effectively respond to the intermittent and volatility of significant wind power penetration, this paper established a multi-time scale coordinated optimal dispatching framework, which divided the dispatch process into 4 stages in time dimension: day-ahead schedule, rolling schedule, coordinated schedule and automatic generation control (AGC) adjustment process. In addition, the hydropower flexibility is suit to cope with the rapid fluctuation of system. Based on the multi-time scale coordinated optimal scheduling mechanism, the example of a composite wind-hydro-thermal power system is simulated, as the illustrated test results, the feasibility of the proposed multi-time scale power dispatch model is verified.