Study on Control Strategies of Solar Photovoltaic Micro-inverter

According to current-mode high-frequency link solar photovoltaic micro-inverter topology structure and working principle, use Matlab building corresponding simulation model. Due to the solar photovoltaic micro-inverter model with nonlinear characteristics, aim at conventional PID controller for non-linear model does not suit the problem, present a control strategic that use conventional PID controller for micro-inverter model to do segment tuning, then assemble segmented control algorithm. Thereby improve problem that the traditional PID controller for micro-inverter nonlinear model control undesirable and improve the grid current waveform. Simulation results show that solar photovoltaic micro-inverter system topology structure and control method has validity and feasibility.