Photovoltaic power generation interface system and control method thereof

Abstract

The invention discloses a photovoltaic power generation interface system which comprises a photovoltaic power generation module, a mode setting module, a main circuit module and an energy storage module. The main circuit module uses a bidirectional half-bridge converter, the transmission power is small, the efficiency is high, and the conversion of charging and discharging modes of the photovoltaic power generation interface system is conveniently realized. Meanwhile, according to the control method of the photovoltaic power generation interface system, a single-chip microcomputer is adopted to directly generate the PWM signal, and the output of the photovoltaic power generation interface system can be adjusted by sampling the output of the main circuit module and then changing the duty ratio of the PWM signal; whether the photovoltaic power generation interface system works normally or not can be judged according to the selected working mode and the actual working state, and protection is provided for the photovoltaic power generation interface system. According to the control scheme that digital control generates PWM control signals, the problems of temperature drift, interference and the like of an analog circuit are solved, high precision can be achieved through software control, and meanwhile upgrading and reconstruction of the system are simple and convenient to expand.

Description

Technical field [0001] The invention relates to the field of circuits, in particular, to a photovoltaic power generation interface system and a control method thereof. Background technique [0002] The large-scale utilization of renewable energy can not only alleviate the current energy crisis, but also greatly reduce the emission of pollutants and achieve better energy-saving and emission-reduction benefits. As one of the cleanest renewable energy sources, solar energy has the advantages of wide distribution, large total volume and long sustainable use time. Therefore, the development prospects of photovoltaic power generation interface systems using solar power are good. However, the current photovoltaic power generation interface system is very susceptible to the sun's radiation time: when the sun is sufficient, the photovoltaic power generation interface system generates sufficient power, and when the load uses low power, the remaining power cannot be used, resulting in a wa...

AI Technical Summary

Problems solved by technology

However, the current photovoltaic power generation interface system is very susceptible to the influence of the sun's radiation time: when there is sufficient sunlight, the photovoltaic power generation interface system generates sufficient power, and when the load uses little power, the remaining power cannot be used, resulting in waste of power; When , the sunlight generated by the photovoltaic power generation interface system cannot meet the load usage

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