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A peak power estimation method based on the full -liquid flow battery of the domain algorithm at the rolling domain algorithm

An all-vanadium flow battery, peak power technology, applied in fuel cells, fuel cell control, fuel cell additives, etc., can solve the problems of inaccurate peak current estimation, peak power estimation error, etc.

Active Publication Date: 2022-08-09
WUHAN UNIV OF TECH
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Problems solved by technology

Inaccurate peak current estimation causes peak power estimation error

Method used

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  • A peak power estimation method based on the full -liquid flow battery of the domain algorithm at the rolling domain algorithm
  • A peak power estimation method based on the full -liquid flow battery of the domain algorithm at the rolling domain algorithm
  • A peak power estimation method based on the full -liquid flow battery of the domain algorithm at the rolling domain algorithm

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Embodiment Construction

[0057] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0058] The invention proposes a method and technology for estimating the peak power of an all-vanadium redox flow battery based on a rolling time domain algorithm, including establishing an equivalent circuit model of the all-vanadium redox flow battery; based on the known SOC and equivalent model parameters, adopting model control The forecast method estimates the peak power of the battery over a period of time in the future.

[0059] The equivalent circuit diagram of the all-vanadium redox flow battery is shown in Fig. figure 1 As shown, in the specific example, a 5kW / 3.3kWh all-vanadium redox flow battery is used as an example for description, and the parameters of the all-vanadium redox flow battery are shown in Table 1.

[0060] Table 1 Parameters of all-vanadium redox flow battery

[0061] Parameter name / unit Numeric...

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Abstract

The invention relates to a method for estimating the peak power of an all-vanadium redox flow battery based on a rolling time-domain algorithm. Based on a first-order equivalent circuit model, the peak power of the battery in the future period is estimated, and on the basis of known model parameters and battery state of charge , using the rolling time domain method to estimate the peak power of the battery for a period of time in the future. The principle of the rolling time domain method compensates the error between the expected output in the future time and the predicted output in the future time through the predicted control amount in the future time. In the present invention, it is assumed that the peak current varies during the estimation period. According to the objective function, the optimized variable is the battery current, and the expectation is to charge or discharge the battery as much as possible to optimize the peak current.

Description

technical field [0001] The invention relates to the technical field of power system energy storage, in particular to a method for estimating the peak power of an all-vanadium redox flow battery based on a rolling time domain algorithm. Background technique [0002] Large-scale energy storage technology can effectively improve the power supply characteristics of renewable energy power generation. It can be used to stabilize power generation output fluctuations, track and forecast errors, and participate in frequency and voltage regulation of power systems to improve the friendliness of new energy power generation grid-connected. All-vanadium redox flow batteries have been successfully used in large-scale energy storage systems due to their high safety, independent output power and capacity, strong overload capability, strong deep discharge capability, and long cycle life. The real-time monitoring and estimation of battery status by the battery management system is of great si...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/373H01M8/04298H01M8/04992
CPCG06F30/373H01M8/04305H01M8/04992Y02E60/50
Inventor 熊斌宇董思迪李旸苏义鑫张清勇唐金锐
Owner WUHAN UNIV OF TECH