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All-vanadium redox flow battery peak power estimation method based on rolling time domain algorithm

An all-vanadium redox flow battery and peak power technology, applied in fuel cells, fuel cell control, fuel cell additives, etc., can solve problems such as inaccurate peak current estimation and peak power estimation errors

Active Publication Date: 2021-05-14
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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  • All-vanadium redox flow battery peak power estimation method based on rolling time domain algorithm
  • All-vanadium redox flow battery peak power estimation method based on rolling time domain algorithm
  • All-vanadium redox flow battery peak power estimation method based on rolling time domain algorithm

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Embodiment Construction

[0059] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0060] The present invention proposes a method 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 an all-vanadium redox flow battery; based on known SOC and equivalent model parameters, adopting model control The prediction method estimates the peak power of the battery for a period of time in the future.

[0061] The equivalent circuit diagram of an all-vanadium redox flow battery is as follows: figure 1 As shown, in the specific example, a 5kW / 3.3kWh all-vanadium redox flow battery is taken as an example for description, and the parameters of the all-vanadium redox flow battery are shown in Table 1.

[0062] Table 1 Parameters of all-vanadium redox flow battery

[0063] Parameter name / unit value Power / k...

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Abstract

The invention relates to an all-vanadium redox flow battery peak power estimation method based on a rolling time domain algorithm, and the method comprises the steps: estimating the peak power of a battery in a future period of time based on a first-order equivalent circuit model, on the basis of known model parameters and a battery charge state, the peak power of the battery in a period of time in the future is estimated by adopting a rolling time domain method, and the error between the expected output at the future moment and the predicted output at the future moment is compensated through the predicted control quantity at the future moment according to the principle of the rolling time domain method. According to the method, it is assumed that the peak current changes in the estimation period, according to the target function, the optimization variable is the battery current, and it is expected that the battery is charged or discharged as much as possible, and the peak current is optimized.

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 characteristics of renewable energy power generation. It can be used to stabilize power generation output fluctuations, track prediction errors, participate in power system frequency regulation and voltage regulation, etc., and improve the friendliness of new energy power generation grid connection. All-vanadium redox flow batteries have been successfully applied in large-scale energy storage systems due to their advantages of high safety, independent output power and capacity, strong overload capacity, strong deep discharge capacity, and long cycle life. The real-time monitoring and estimation of the battery status by the battery management s...

Claims

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Application Information

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Patent Type & Authority Applications(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
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