Research on Maximum Power Point Tracking Control of Wind-Solar Hybrid Generation System

Abstract

This article briefly analyzes the technical advantages of the wind-solar hybrid power generation system, builds models of wind power generation systems, photovoltaic systems, and storage batteries, focusing on the key to wind and photovoltaic power generation systems-maximum power point tracking (MPPT) control, and detailed analysis of the maximum wind and solar power. In order to improve the stability of the wind and solar hybrid power generation system after being connected to the grid. For its grid-connected inverter. A control strategy is proposed: segmented control and improved double closed-loop proportional integral (Proportion Integration, PI). That is to segment according to the strength of the scenery. Adopt the dual structure control of the outer ring of fan speed-the inner ring of fan current and the outer ring of DC boost circuit voltage-the inner ring of grid-connected current. In order to weaken the influence on the frequency and amplitude of the grid. First analyze the mathematical models of wind power generation, photovoltaic power generation, and storage batteries. Then build a complementary power generation system and propose a control strategy. Finally, the simulation is verified by simulation software. The simulation results show that the proposed control strategy can effectively achieve stable operation. For different periods after the wind and solar hybrid power generation system is connected to the grid. Reduce the fluctuation of grid-connected current and maintain the stability of voltage and current. Increase the power grid's ability to absorb new energy.