Wind electricity-based electric energy quality series compensator

Abstract

The invention discloses a wind electricity-based electric energy quality series compensator. The wind electricity-based electric energy quality series compensator comprises a wind turbine, a synchronous generator, a rectification unit, a three-phase H-bridge inverter unit and a series transformer and is connected in series with a power grid; when the power grid runs normally, the electric energy quality compensator converts wind energy into electric energy and outputs power to load; when the voltage of the power grid drops or rises suddenly (surges) due to the failure of the power grid, the electric energy quality compensator outputs the corresponding compensating voltage, so that the voltage of the load end is kept unchanged; and therefore, the load can be protected from being influenced by the failure of the power grid. By using the wind energy, the problems in the energy storage of the conventional series compensator are solved; and the wind electricity-based electric energy quality series compensator has the characteristics that by wind energy generation and energy storage, the problem that the voltage drops and rises suddenly can be solved, and the electric energy quality is improved.

Description

technical field [0001] The invention relates to the technical field of power quality, in particular to a power quality series compensator based on wind power. 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, etc., and will also bring harm to equipment in important power-consuming departments such as medical care, causing serious production and operation accidents. Research by the American Electric Power Research Institute (EPRI) shows that electric energy Quality problems lead to US$30 billion in losses in data, materials and productivity in the U.S. industry every year (Electric Power Research Institut...

AI Technical Summary

Problems solved by technology

However, the problem of energy storage has always plagued the problem of dynamic voltage compensators. Although some advanced methods such as the minimum energy injection method have been proposed, the additional energy storage has always affected its further promotion and development.

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