Design of Wind-solar Complementary Power System Based on Progressive Fuzzy Control

In order to make a wind-solar complementary power system be a self-intervention controller, a new fuzzy control approach to hybrid power generation in wind and solar co-generation system is developed in this paper. Firstly, a new kind of structure of wind-solar complementary power system is designed. The method of double-fed brushless wind turbine sets is adopted, based on the principle of nonlinear control theory, according to the external excitation caused by the nonlinear changes of wind forces and wind speeds, for the purpose of capturing the wind power in the greatest degree. Meanwhile, the idea of extensional adaptive control on solar cells is adopted, also in order to transform the renewable energy to electrical power to the most degree. Secondly, according to the analysis on the characteristics of the multi-input and multi-output of the distributed wind-solar complementary power system, a progressive fuzzy control algorithm based on fuzzy control method and adaptive control theory is put forward to control the loading and unloading process congruously among the wind turbines, the solar cells and the grid. Finally, the simulation study is carried out. It is shown that the new kind of wind-solar complementary power system can achieve the balance quite well between the supply and the demand of the electrical energy automatically according to the load of system, under the premise of improving the utilization rate of renewable resources as much as possible.