Power control method and photovoltaic power generation system

Abstract

The application provides a power control method and a photovoltaic power generation system. The power control method comprises the following steps: recording the maximum value and the minimum value of the working current of each photovoltaic input; determining a first current value based on the recorded maximum value of the working current and determining a second current value based on the recorded minimum value of the working current; determining a first photovoltaic input and determining a second photovoltaic input; adjusting the output power of the first photovoltaic input and the output power of the second photovoltaic input so that the sum of the output powers of the photovoltaic inputs is less than or equal to a preset total power threshold; updating the first current value based on the current maximum value of the working current and updating the second current value based on the current minimum value of the working current; and returning the photovoltaic input whose working current is close to the first current value or the second current value as the first photovoltaic input. The application can improve the stability of the power limitation of the photovoltaic power generation system and make the working efficiency of the photovoltaic power generation system optimal without increasing the complexity of the control algorithm.

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