Wind farm power and voltage regulation system containing energy storage and capacity configuration optimization method thereof

Abstract

The invention discloses a wind farm power and voltage regulation system containing energy storage and a capacity configuration optimization method thereof. When a power grid load is at a low ebb, thepower grid dispatching power is greater than the output power of a wind farm, compressed air energy storage is in a compressed energy storage mode, and excess wind energy is converted into high-pressure air energy for storage; at the same time, after high-pressure and high-temperature air generated in the compression process passes through a heat exchanger, heat is stored in a heat storage chamberthrough heat transfer oil for preheating expanded air; when the output power of the wind farm is greater than the set fluctuation, an air storage tank releases high-pressure air to generate electricity in an expanding mode, and at the same time, the high-pressure air absorbs the heat of the high temperature heat transfer oil through the heat exchanger and converts the heat into electrical energyto stabilize the fluctuation; and when the output power of the wind farm is greater than the set value, the voltage stability is ensured and the reactive power margin of reactive power compensation equipment is increased by adjusting the power factor of a direct-drive wind turbine unit, the reactive power output by the compressed air energy storage and the output of a static reactive generator.

Description

technical field [0001] The invention relates to a wind farm power and voltage control system including energy storage and a capacity configuration optimization method thereof. Background technique [0002] Energy is an important material basis for the survival and development of human beings. It is related to the national economy, the people's livelihood and national security. It is also the primary field of technological innovation services and applications. Efficient, clean, and low-carbon have become the mainstream direction of energy development in the world today. Nowadays, wind power generation is favored as a typical representative of green energy, and has shown a trend of rapid development. [0003] At present, the impact of large-scale wind power grid-connection on grid dispatching and control is mainly manifested in issues such as active power regulation and reactive power voltage control, such as capacity allocation of backup equipment, reactive power and voltage...

AI Technical Summary

Problems solved by technology

However, the cost of conventional energy storage devices is high, and the high-power power electronic converters used for energy storage access systems have problems of high price and poor stability, making it difficult to apply energy storage in large-scale wind farms

[0007] 3) The current research on compressed air energy storage mainly focuses on the output control of active power, but does not involve the control function of reactive power

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