| Wind and solar power have natural complementary characteristics. With the completion of the construction of large number of wind and solar photovoltaic power plant, in order to reduce the fluctuation of output power of intermittent characteristics of single wind or photovoltaic power grid integration and improve the renewable energy power grid-connected rate, connecting wind power and photovoltaic power station cluster complementary to grid scheduling and control have gradually began to be applied. Wind power and photovoltaic power station increased the uncertainties in the system, making the system more complex and more difficult to deal with. Processing speed is particularly important to properly deal with the fluctuation of wind power as well as photovoltaic power and load. Research on the dynamic economic dispatch of power system contain large capacity’s wind-photovoltaic complementary power, is to guarantee the stable security and reliable operation of system, taking into account the various constraints in the system, so that the utility system to achieve the best.This paper in the light of connecting wind farm and solar photovoltaic power station complementary to grid, Firstly, quiet analysis the wind and solar energy resources, and introducing the mathematical model of wind power generation system and solar photovoltaic power generation system. Then, introducing punitive measures to thermal power unit because of it’s output pollute the environment, and to wind and solar photovoltaic power station because of their output is intermittent fluctuation add the requirement of spare capacity. At the same time, Considering the supply-demand balance, unit ramp rate etc constraints of the dynamic economic dispatch of power system formed the mathematical model of power system dynamic economic dispatch with wind-photovoltaic complementary grid-connect. Secondly, With equal consumed energy ratio criterion as the core, deduce and analyse the high speed dynamic economic dispatch algorithm. According to the complementary characteristics of wind and solar power, proposed wind power and photovoltaic power complementary dispatch strategy. Treating wind power and photovoltaic power with the load as "generalized load", give new high-speed dynamic economic dispatch algorithm consideration of wind-photovoltaic complementary dispatch strategy. Lastly, In the IEEE-30node test system, using new high-speed dynamic economic dispatch algorithm deal with the practical examples, verified the rationality of the model and scheduling policies and the superiority of new high-speed dynamic economic dispatch algorithm. The results show that, new high-speed dynamic economic dispatch algorithm can fast solve dynamic economic dispatch problem of power system containing large amount of renewable power, wind-photovoltaic complementary dispatch strategy can stabilize the fluctuation of output of single wind power, and increasing the rate of Grid-connected wind power and photovoltaic power. |
