Photovoltaic inverter, control method of photovoltaic inverter and photovoltaic power generation system with photovoltaic inverter

Abstract

The invention discloses a control method of a photovoltaic inverter. The control method includes the steps of detecting direct-current voltage of direct-current input side of the photovoltaic inverter in real time; detecting alternating-current voltage and alternating current of the alternating-current output side of the photovoltaic inverter; and according to the direct-current voltage, the alternating-current voltage and the alternating current, controlling start and stop of the photovoltaic inverter. According to the control method, start and stop of the photovoltaic inverter can be controlled according to the direct-current voltage, the alternating-current voltage and the alternating current detected in real time, start voltage of the photovoltaic inverter can be adjusted in time in different areas and seasons, electric energy of a solar cell array is converted into alternating current as much as possible, sent to a power grid, utilization efficiency of the electric energy of solar panels is greatly improved, no auxiliary equipment is required, the cost of the photovoltaic inverter is decreased, and start-stop control is simplified for the photovoltaic inverter. The invention further discloses the photovoltaic inverter and a photovoltaic power generation system with the photovoltaic inverter.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a control method of a photovoltaic inverter, a photovoltaic inverter and a photovoltaic power generation system with the photovoltaic inverter. Background technique [0002] With the increasing consumption of non-renewable energy and environmental pollution, countries around the world are paying more and more attention to energy conservation and emission reduction. Green energy has become the direction of future energy development. Governments of various countries have also increased their support for green energy. The solar power generation industry to develop rapidly. Solar power generation includes photothermal power generation and photovoltaic power generation. The current photovoltaic power generation system includes solar panels, photovoltaic inverters and other equipment. The photovoltaic inverter converts the electrical energy in the solar panel into...

AI Technical Summary

Problems solved by technology

This solution has a strong adaptability, but it needs to install auxiliary equipment, which leads to an increase in the cost of the photovoltaic inverter and a complicated structure; at the same time, the start and stop of the photovoltaic inverter is also controlled by the auxiliary equipment. When the auxiliary equipment fails, it will As a result, the photovoltaic inverter cannot be started and stopped normally, affecting the normal use of the photovoltaic inverter and reducing the inverter efficiency of the photovoltaic inverter

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