An energy storage system output guidance method and device for smoothing wind power fluctuations

Abstract

The invention provides a method and device for guiding force exertion of an energy storage system for stabilizing wind and light power fluctuation and belongs to the technical field of electric power. The method comprises the steps that fast Fourier transform is conducted on an original wind and light force-exerting data curve so that an original wind and light force-exerting frequency spectrum can be obtained; according to the original wind and light force-exerting frequency spectrum, a filter type and a filter cut-off frequency selection zone are determined; according to each cut-off frequency, a force-exerting target curve of the energy storage system is obtained through the filter algorithm; according to the force-exerting target curve, corresponding to each cut-off frequency, of the energy storage system, integration is conducted in a set reference time frame, and the force-exerting target curve, with the integration result close to zero, of the energy storage system is determined to be an optimal force-exerting curve of the energy storage system; force exertion of the energy storage system is guided through the optimal force-exerting curve. According to the method and device for guiding force exertion of the energy storage system for stabilizing wind and light power fluctuation, it is guaranteed that the wind and light power stabilizing effect and the fluctuation frequency satisfy the index requirement, the condition that energy state variation of the energy storage system is optimized is considered, the whole achievement process is simple and easy to control, and the method and device are good in practicability.

Description

technical field [0001] The present invention relates to the field of electric power technology, in particular to a method and device for guiding output of an energy storage system for smoothing fluctuations in wind power. Background technique [0002] In recent years, distributed power supply technology based on renewable energy generation from wind energy and solar lamps has become the focus of development in the energy field. Seriously affect the stable operation of the power grid. At present, the method of directly adjusting the operating state of the wind turbine or combining pitch and variable speed control is used to smooth its output power. However, the adjustment ability of this method is very limited, and the continuity of power generation and power supply cannot be guaranteed. and smooth. Contents of the invention [0003] The main purpose of the embodiments of the present invention is to provide an energy storage system output guidance method and device for smo...

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Problems solved by technology

[0002] In recent years, distributed power supply technology based on renewable energy generation from wind energy and solar lamps has become the focus of development in the energy field. Seriously affect the stable operation of the power grid. At present, the method of directly adjusting the operating state of the wind turbine or combining pitch and variable speed control is used to smooth its output power. However, the adjustment ability of this method is very limited, and the continuity of power generation and power supply cannot be guaranteed. and smooth

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