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Multi-source energy storage device control method based on power distribution network load frequency index

A frequency index and device control technology, applied in the direction of energy storage, AC network load balancing, reducing/preventing power oscillation, etc., can solve the problems of AC circuit hindering development, electrolyte leakage, large internal resistance, etc., to achieve frequency stability and control frequency. Stable, good frequency modulation effect

Active Publication Date: 2020-07-03
SHENYANG POLYTECHNIC UNIV
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Problems solved by technology

Supercapacitors have the advantages of fast charging and discharging, but if used improperly, it will cause electrolyte leakage and other phenomena. Its internal resistance is large, so it cannot be used in AC circuits, thus hindering its further development

Method used

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  • Multi-source energy storage device control method based on power distribution network load frequency index
  • Multi-source energy storage device control method based on power distribution network load frequency index
  • Multi-source energy storage device control method based on power distribution network load frequency index

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Embodiment Construction

[0034] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0035] In this embodiment, 10,000 sets of batteries are used to cooperate with 10,000 sets of fuel cells and hydrogen storage devices.

[0036] Such as figure 1 As shown, the method of this embodiment is as follows.

[0037] Step 1: Data collection;

[0038] The 24 full-point time data P of the difference between the load power and power generation power of the distribution network predicted for the next day 1 ,P 2 ,...,P 23 ,P 24 ;The maximum capacity of the battery C max =200Ah; battery charge and discharge capacity Q e =30Ah; battery full charge voltage E full =28V; the cut-off voltage E of the exponential region in the battery discharge curve EXP =22V; discha...

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Abstract

The invention discloses a multi-source energy storage device control method based on a power distribution network load frequency index, and belongs to the technical field of multi-source energy storage device control. The method comprises: a lithium battery and an oxyhydrogen fuel cell having different response speeds to frequency indexes, rapidly calculating a frequency index corresponding to thedifference between the load power and the generated power of the power distribution network according to 24 hourly moment data of the difference between the load power and the generated power of thepower distribution network predicted on the next day, and selecting different adjustment strategies by comparing the frequency index with adjustment capability indexes of a lithium battery, a hydrogenstorage device and a hydrogen-oxygen fuel cell. Through the synergistic effect, the adjusting effect on the multi-energy system is enhanced, and the control frequency of the multi-source energy storage device is stable.

Description

technical field [0001] The invention relates to the technical field of multi-source energy storage device control, in particular to a multi-source energy storage device control method based on distribution network load frequency index. Background technique [0002] With the rapid development of new energy technologies, especially clean energy represented by wind power and photovoltaics. Due to the impact of large-scale new energy grid integration on the reliability of power system operation and the stability of power quality, the frequency problem of the power grid is particularly prominent. At present, most of our country still adopts a single energy storage device to adjust the frequency. The capacity and response speed of a single energy storage device will be difficult to meet the frequency regulation demand. This problem has become one of the main restrictive factors for the grid to accept new energy grid connection. In order to alleviate the problem of new energy grid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24H02J3/32
CPCH02J3/24H02J3/32Y02E70/30
Inventor 滕云魏来徐震马俊雄朱祥祥袁浦郑晨鲍瑞钟磊
Owner SHENYANG POLYTECHNIC UNIV
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