Optimal Dispatch of Wind-hydro-thermal Power System With Priority Given to Clean Energy

Large-scale integration of wind power has brought profound challenge to traditional power generation dispatch.It becomes necessary to effectively coordinate the operation of wind power and traditional power sources.Considering the nature of wind,hydro and thermal power,a multi-objective optimal dispatch model was established for wind-hydro-thermal power system aiming at fully using clean energy,reducing operation cost and ensuring efficient operation of thermal generators.In order to avoid frequent starting and shutting or part-load operation of thermal generators that caused by capacity redundancy and wind randomness,a heuristic search method was applied to determine the number of dispatched thermal units.By introducing the antibody reproduction stratagem in artificial immune algorithm,the conventional particle swarm algorithm was improved through adding particle concentration cognition item and has been proved its superiority on a 10-unit test system.The modified IEEE 24-bus test system was used to verify the rationality and feasibility of the proposed model and algorithm,meanwhile the coordinated operation strategy of wind,hydro and thermal power was obtained.