Grid-connected photovoltaic power generation system capable of stabilizing quality of electric energy

Abstract

The invention relates to a grid-connected photovoltaic power generation system capable of stabilizing the quality of electric energy. The grid-connected photovoltaic power generation system comprises a power generation module and a grid-connected access box, wherein the power generation module comprises a fixed support and a solar cell panel arranged on the fixed support; the power generation module is connected with a direct-current motor for converting direct current generated by the power generation module into mechanical energy; the direct-current motor is connected with an alternating-current motor for converting the mechanical energy into alternating current; the alternating-current motor is connected with a transformer; and the transformer is connected with the grid-connected access box. The grid-connected photovoltaic power generation system has the advantages that the direct current generated by the power generation module is converted into the mechanical energy through the direct-current motor, then the mechanical energy is converted into the alternating current through the alternating-current motor, and the alternating current is converted into same-frequency and same-phase sinusoidal current with a power grid through the transformer, so that three-phase output balance for a three-phase alternating-current generator set is realized, the quality of the electric energy is stable, the system is free of harmonic generation, a synchronous connection requirement is met, and the operational safety performance of the grid-connected power generation system is improved.

Description

technical field [0001] The invention relates to a photovoltaic grid-connected power generation system with stable power quality. Background technique [0002] The grid-connected photovoltaic power generation system refers to the photovoltaic power generation system connected to the AC power grid. At present, in the field of traditional photovoltaic power generation, the grid-connected method is to convert the DC power of the photovoltaic array into AC power through a power regulator to realize grid connection. The power regulator The inverter is its main component, and the grid connection of the inverter will affect the power quality of the grid, such as voltage, frequency, waveform, etc., and it is easy to cause problems such as harmonics and three-phase current imbalance, and the solar panels in the power generation components It is installed on the roof of the user through a bracket, but the existing bracket structure is single, the solar panel is easy to loose after inst...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a photovoltaic grid-connected power generation system with stable power quality, and solve the problems of easy generation of harmonics and three-phase current imbalance in existing photovoltaic grid-connected power generation systems

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