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Dual-Integral Sliding-Mode Maximum Power Point Tracking for Photovoltaic Systems under Partial Shading

When the photovoltaic array system encounters partial shadow occlusion in the actual project, the system is unstable, and there are multiple peak points in the output characteristic curve. The global maximum power point cannot be tracked by using the conventional MPPT algorithm, and the maximum power cannot be output quickly and accurately in a short time. In this paper, a double integral sliding mode control method based on POC algorithm is proposed to solve the problem of multi peak global maximum power point tracking under partial shadow and the problem of slow response and large jitter of photovoltaic system. Simulation results show that this method improves the response speed and tracking accuracy of power tracking under partial shadow occlusion, and reduces the oscillation of output power.