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Control method of hybrid energy storage system for stabilizing intermittent power fluctuation

A technology of hybrid energy storage system and power supply, applied in the direction of AC network load balancing and so on

Active Publication Date: 2014-02-12
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0004] Secondly, the method of using low-pass filter to decompose the power signal of intermittent power supply to obtain the target power and energy storage charging and discharging power has been widely adopted. Fluctuation method" Chinese patent application discloses a method for effectively smoothing the output power fluctuations of the wind and solar power generation system by optimizing the filtering time constant of the low-pass filter in real time, but the determination of the time constant of the low-pass filter in this method And optimization is mainly based on subjective experience, rather than starting from the detailed characteristics of the data itself and the specific performance characteristics of different types of energy storage systems, which has certain limitations

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  • Control method of hybrid energy storage system for stabilizing intermittent power fluctuation
  • Control method of hybrid energy storage system for stabilizing intermittent power fluctuation
  • Control method of hybrid energy storage system for stabilizing intermittent power fluctuation

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[0045] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0046] The present invention provides a control method for a hybrid energy storage system that can simply and efficiently stabilize intermittent power supply power fluctuations. The hybrid energy storage system includes a power type energy storage system and an energy type energy storage system; figure 1 As shown, the specific steps of the method are:

[0047] Step 1: The power acquisition module of the hybrid energy storage system collects the output power P of the intermittent power supply in real time, and obtains the stabilized target power P of the intermittent power supply g (k); Obtain the target power of stabilization P g The method of (k) is: carry out fast Fourier transform to output power P, utilize wavelet packet decomposition method to decompose the frequency d...

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Abstract

The invention provides a control method of a hybrid energy storage system for stabilizing intermittent power fluctuation. According to the method, a power acquisition module is utilized to acquire the output power P of an intermittent power supply in real time. The method includes the specific steps that (1) the stabilized target power Pg (k) of the intermittent power supply is acquired; (2) the power magnitude and the SOC of the hybrid energy storage system are analyzed; (3) the output power P is stabilized according to the output power magnitude and the SOC of the energy storage system. Compared with the prior art, according to the control method of the hybrid energy storage system for stabilizing intermittent power fluctuation, power fluctuation can be simply and efficiently stabilized, and power generation stability and reliability of the intermittent power supply are improved.

Description

technical field [0001] The invention relates to a control method of a hybrid energy storage system, in particular to a control method of a hybrid energy storage system for smoothing intermittent power supply power fluctuations. Background technique [0002] The pressure from energy and the environment has led to more and more applications of renewable energy power generation. Renewable energy power generation has intermittent and random characteristics. Studies have shown that intermittent power sources such as grid-connected renewable energy have impacts and impacts on grid security, stability, and power quality. Therefore, through the self-regulation of the intermittent power supply, the parameters such as grid-connected power fluctuations can meet the grid-connected standards. However, the output power of the intermittent power supply presents obvious fluctuations, which brings certain challenges to the reliable and stable operation of the power system, and causes a seri...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/28
Inventor 李建林吴振威马会萌惠东
Owner STATE GRID CORP OF CHINA
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