Energy-efficient inversion boost complete equipment and method for solar energy power generation

Abstract

The invention discloses an energy-efficient inversion boost complete equipment and method for solar energy power generation; the complete equipment comprises the following units: a boost electric power transformer used for boosting the AC electric energy outputted by a photovoltaic grid connected inverter to high voltage, and delivering the high voltage to the power grid through a switch unit; theswitch unit used for conducting or breaking the electric connection between the boost electric power transformer and the power grid according to a switch control order, detecting the voltage amplitudes and waveforms on the power grid side and the high voltage side of the boost electric energy transformer, and sending same to an intelligent converter; the intelligent converter used for receiving the voltage amplitudes and waveforms sent by the switch unit, outputting a control signal to the boost electric energy transformer, controlling the voltage amplitude and waveform of the high voltage side of the boost electric energy transformer, and sending the switch control order to the switch unit; a step down transformer used for providing the work power supply for the intelligent converter. The energy-efficient inversion boost complete equipment can quit the transformer in night, thus saving energy consumption, and reducing electricity costs; the transformer can be timely put in service before the power generation process, thus ensuring the reliability and equipment life.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation technology, in particular to an energy-saving inverter booster complete set and method for solar power generation. Background technique [0002] With the rapid development of new energy technology, solar power generation has been widely used and developed rapidly. The main method of solar grid-connected power generation system is to output the photovoltaic grid-connected inverter in the photovoltaic module through a step-up power transformer (such as a box-type substation). Electric energy is fed into the grid (the voltage level in China is usually 10kV or 35kV), and currently there is actually no consideration of the energy waste of these power transformers consuming energy at no load when power generation is stopped at night. [0003] The solar grid-connected power generation system can collect solar radiation energy. Generally, the photovoltaic effect is used to convert so...

AI Technical Summary

Problems solved by technology

[0006] The excitation inrush current is related to the phase angle of the system voltage when the transformer is switched on, the residual magnetic flux of the transformer iron core, and the impedance of the power supply system. , In some cases, the inrush current can cause electric fluctuations. If no corresponding measures are taken, it may cause overcurrent of the transformer or malfunction of relay protection, resulting in power failure and affecting the use of other users.

In addition, high-voltage transformers do no-load closing operations every day to generate voltage and current shocks, thermal shocks, and electromagnetic effects caused by inrush currents, which will cause mechanical forces and vibrations inside the transformer, thereby shortening its service life.

[0007] In order to meet the needs of photovoltaic power generation, the transformer can be withdrawn at night, so as to save energy consumption and reduce electricity costs. At the same time, it is a technical problem to be solved that the transformer should be put into operation in time before power generation without reducing reliability and equipment life.

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