Novel brushless double-feed wind power generation system with superconducting magnetic energy storage function

Abstract

The invention discloses a novel brushless double-feed wind power generation system with a superconducting magnetic energy storage function. The system comprises a brushless double-feed wind power generator, a chopper with a superconducting coil, a motor side current transformer and a power grid side current transformer, and the output end of the brushless double-feed wind power generator is connected into a power grid after sequentially going through the motor side current transformer, a motor side, a power grid side, a power grid side current transformer and a transformer; the superconductingcoil is composed of superconducting magnets, serves as a middle link of energy storage of the system and is connected with the motor side current transformer and the power grid side current transformer through the chopper; high energy density and quick response characteristics of superconducting magnetic energy storage are utilized to perform certain active or reactive power compensation on voltage fluctuation and flickering caused by wind speed change. Grid connection stability of the wind power generation system is improved, expense consumption caused by stability of the power grid and maintenance of a motor is reduced effectively, maintenance expense is reduced, and protection is protected.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a novel brushless double-fed wind power generation system with superconducting magnetic energy storage. Background technique [0002] As we all know, wind energy is a clean and renewable energy. my country has a vast territory, a long coastline, and abundant wind energy resources, especially the southeast coastal areas are areas with extremely high wind speeds, and the northeast, north China, northwest, and Inner Mongolia are areas rich in wind energy resources. Large-scale wind farms have been distributed and established in these places. It is estimated that by 2020, the total installed capacity of wind turbines in the country will reach 80 million to 100 million kilowatts, providing 6% of my country's electricity demand, despite the uncertainty of the global electricity market. my country has put forward a strong support policy for wind power-based renewable energ...

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Problems solved by technology

Although the current mainstream high-power variable-speed constant-frequency wind turbine is DFIG (double fed induction generator double-fed induction motor), but DFIG retains the brushes and

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