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Large-scale energy storage battery equivalent optimization method and system

An energy storage battery and optimization method technology, applied in design optimization/simulation, measurement of electricity, measurement of electrical variables, etc., can solve problems such as inconvenient analysis and calculation, complex battery model, etc.

Pending Publication Date: 2021-09-03
NANJING GUODIAN NANZI POWER GRID AUTOMATION
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  • Application Information

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Problems solved by technology

In this way, when the battery scale is large (that is, the number of cells is large), the battery model will be extremely complicated, which is not convenient for analysis and calculation

Method used

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  • Large-scale energy storage battery equivalent optimization method and system
  • Large-scale energy storage battery equivalent optimization method and system
  • Large-scale energy storage battery equivalent optimization method and system

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Embodiment Construction

[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0059] see figure 1 As shown, the present invention provides a large-scale energy storage battery equivalent optimization method, including the following steps:

[0060] Step 1, set the allowable error E p , that is, the error threshold (the present invention is set to 5% based on experience), and the order N of the overall battery model is initialized w , as shown in Equation 1.

[0061] N w = 1 (1)

[0062] Step 2, get battery cell model parameters {a ...

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Abstract

The invention discloses a large-scale energy storage battery equivalent optimization method, which comprises: 1) setting an error threshold value, and initializing a battery overall model order Nw; 2) obtaining battery monomer model parameters; 3) calculating battery overall model parameters according to the battery monomer model parameters; 4) performing calculation according to the overall model parameters of the battery to obtain an equivalent simplification error; and 5), if the equivalent simplification error is not larger than the error threshold value, ending calculation, otherwise, executing the step 4 for recalculation. Through analysis and calculation of the single battery parameters, the overall battery simplification parameters meeting the expected error range are obtained, and the invention has the advantages of being universal, efficient and easy to operate.

Description

technical field [0001] The invention belongs to the technical field of new energy and electric power storage, and in particular relates to a large-scale energy storage battery equivalent optimization method and system. Background technique [0002] Large-scale energy storage batteries are composed of several battery cells. Due to factors such as manufacturing process, operating conditions, and aging degree, there are certain differences in the parameters of the battery cells. For the modeling analysis of battery cells, the equivalent circuit model is mostly used. Assuming that the model order of the battery cell is f, if there are g battery cells with inconsistent parameters, the order of the energy storage battery as a whole will reach f×g. According to this method, when the battery scale is large (that is, the number of cells is large), the battery model will be extremely complicated, which is not convenient for analysis and calculation. Contents of the invention [00...

Claims

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Application Information

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IPC IPC(8): G06F30/20G01R31/367
CPCG06F30/20G01R31/367
Inventor 李帅常晓勇陈福锋王玉婷徐程骥
Owner NANJING GUODIAN NANZI POWER GRID AUTOMATION