Research on Modelling and Operation Characteristics Analysis of Large-Scale Wind & Light Complementary Electricity-Generating System

A dynamic analysis model for large-scale wind power generation system complementary with photovoltaic(PV) power generation system is built and based on the rate of power change an improved perturbation and observation algorithm to trace maximum power is proposed.The decoupled dual-loop current control strategy with active and reactive power decoupling is adopted in both wind power generation system and PV generation system,and the static synchronous compensator is used to analyze transient fault voltage of the proposed model.The effectiveness of the proposed model as well as its power fluctuation characteristics and the impact of its transient on bus voltage are verified by simulation of power grid which contains wind power generation system complementary with PV generation system.Simulation results show that the proposed model can effectively smooth the fluctuation of output power and implement the low voltage ride through(LVRT) that is favorable to the stable and secure operation of power grid and the complementary power generation system.