Photovoltaic system power generation efficient and stable control method suitable for complex environment

The invention discloses a photovoltaic system power generation efficient and stable control method suitable for a complex environment. The illumination condition of each photovoltaic module is automatically detected, and different algorithms are selected to control the photovoltaic system to output the maximum power. When each photovoltaic module is uniformly illuminated, the method uses an improved variable step size perturbation and observation method to realize rapid tracking of the maximum power point of the photovoltaic panel. When the photovoltaic module is under complex illumination (partial shading), the method uses the weighted variation particle swarm optimization MPPT algorithm to track the photovoltaic maximum power point, and the overall output power of the photovoltaic system is optimal. According to the method, the advantages of high tracking speed and low steady-state oscillation of an improved variable step size perturbation and observation method in a uniform illumination environment and the