Feedforward voltage drop or surge compensation device based on wind and photoelectric complementation, and method

Abstract

The invention discloses a feedforward voltage drop or surge compensation device based on wind and photoelectric complementation. The compensation device comprises a wind power generator, a rectification unit, a solar photovoltaic cell panel, a direct current voltage boosting unit, an H bridge inversion unit, a transformer, a grid-connected inverter, a direct current chopper unit, a direct current detection device, a direct current voltage detection device, an alternating current voltage detection device and a controller, wherein the controller is connected with the direct current detection device, the direct current voltage detection device, the rectification unit, the wind power generator and the direct current voltage boosting unit respectively, judges a working state of a grid according to an alternating current voltage value transmitted by the alternating current voltage detection device to control the H bridge inversion unit to output alternating current voltage to compensate voltage drop or surge of the grid, controls the grid-connected inverter to inject electric energy into the grid, and controls the direct current chopper unit to release the electric energy. The invention further discloses a method for compensating the voltage drop or the surge based on the compensation device.

Description

technical field [0001] The present invention relates to a voltage compensating device and method, in particular to a voltage compensating device and method based on wind and electricity complementarity. Background technique [0002] Developed countries have very high requirements on power quality. Power quality problems will not only bring great economic losses to the industry, such as shutdown and restart, which will increase production costs, damage responsive equipment, scrap semi-finished products, and reduce product quality. Marketing difficulties will damage the company's image and good business relations with users, and it will also bring harm to equipment in important power-consuming departments such as medical care, causing serious production and operation accidents. Research by the Electric Power Research Institute (EPRI) of the United States shows that power quality problems cause US industry to lose $30 billion in data, materials and productivity every year (Elec...

AI Technical Summary

Problems solved by technology

Compared with UPS, the dynamic voltage compensator can effectively solve the problem of voltage sag, but the energy storage problem has always plagued the research of the dynamic voltage compensator. Although some advanced methods such as the minimum energy injection method have been proposed, the additional energy storage is always Affect its further promotion and development

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