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

A technology of photovoltaic inverter and control method, which is applied in the direction of photovoltaic power generation, photovoltaic modules, and irreversible DC power input to AC power output, and can solve the problem of reducing the inverter efficiency of photovoltaic inverters and the inability of photovoltaic inverters Problems such as normal start and stop, affecting the normal use of photovoltaic inverters, etc., achieve the effect of simple and reliable control methods, improved utilization efficiency, and simplified structure
CN104253530AActive Publication Date: 2014-12-31BYD CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BYD CO LTD
Publication Date
2014-12-31

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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.
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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...

Claims

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