Wind power fluctuation suppression method of hybrid energy storage wind power generation system

A technology of wind power generation system and wind power fluctuation, which is applied in the field of wind power fluctuation control, and can solve problems such as the distribution of power can not fully utilize hybrid energy storage equipment, large energy storage capacity, and power output lag

Inactive Publication Date: 2013-06-26
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0006] The object of the present invention is to propose a method for suppressing wind power fluctuations of a hybrid energy storage type wind power generation system to solve the power output lag existing in the prior art when smoothing the wind power fluctuations of a ...

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  • Wind power fluctuation suppression method of hybrid energy storage wind power generation system
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  • Wind power fluctuation suppression method of hybrid energy storage wind power generation system

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Embodiment Construction

[0049] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0050] figure 1 It is a block diagram of smoothing wind power fluctuation control.

[0051] Such as figure 1 As shown, the present invention collects the direct output power P of the wind farm in real time through the data acquisition module WG (t) and the combined output of wind storage at the previous moment P out (t-1), send the data to the stability control module. The stabilization control module adjusts the result of the EMD low-pass filter according to the severity of the power fluctuation, and outputs the stabilized wind power P out (t), while calculating the output P of the hybrid energy storage system HESS (t). The output of the hybrid energy storage system collected by the data acquisition module in r...

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Abstract

The invention discloses a wind power fluctuation suppression method of a hybrid energy storage wind power generation system, and belongs to the field of wind power fluctuation control technologies of a hybrid energy storage system. The method comprises the steps of: acquiring the output power of a wind power plant at a moment t as well as the output power of the hybrid energy storage wind power generation system at a previous moment (t-1); performing empirical mode decomposition operation on the output power of the wind power plant at the moment t to obtain n intrinsic mode function components and one remainder term; calculating the output power of a hybrid energy storage sub-system at the moment t; determining the charging-discharging priorities of a battery and a super capacitor at the moment t; calculating the output powers of both the battery and the super capacitor at the moment t; respectively controlling the battery and the super capacitor to output powers according to the output powers of both the battery and the super capacitor at the moment t; and repeating the above steps when entering the next moment (t+1). The wind power fluctuation suppression method provided by the invention solves the problem of output delay of a conventional filter algorithm, and overcomes the disadvantages that a single energy storage medium is poor in fluctuation suppression capability and short in service life.

Description

technical field [0001] The invention belongs to the technical field of wind power fluctuation control of a hybrid energy storage system, and in particular relates to a method for suppressing wind power fluctuation of a hybrid energy storage type wind power generation system. Background technique [0002] Wind power has become the third largest power source in my country, but the inherent intermittent volatility of wind power makes its large-scale grid connection endanger the safety and stability of power grid operation, and poses great challenges to power grid frequency regulation and reserve capacity planning. The combination of large-scale energy storage and large-capacity wind power generation systems is a necessary trend for the development of renewable energy. [0003] Common energy storage devices can be divided into power type and energy type energy storage devices. Energy-based energy storage systems (such as batteries) have high energy density, but slow response sp...

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Application Information

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IPC IPC(8): H02J3/32
CPCY02E10/76Y02E70/30
Inventor 韩晓娟程成孔令达黄惠
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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