Echelon utilization reconstruction energy storage system capacity configuration method based on risk defense

An energy storage system and capacity configuration technology, applied in circuit devices, load forecasting in AC networks, load balancing in AC networks, etc., can solve problems such as high operational safety risks, short remaining life, inconsistent initial capacity of retired power batteries, etc. Achieve high environmental benefits and low investment costs

Pending Publication Date: 2020-11-13
SHENYANG POLYTECHNIC UNIV
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  • Claims
  • Application Information

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Problems solved by technology

However, decommissioned power batteries have problems such as inconsistent

Method used

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  • Echelon utilization reconstruction energy storage system capacity configuration method based on risk defense
  • Echelon utilization reconstruction energy storage system capacity configuration method based on risk defense
  • Echelon utilization reconstruction energy storage system capacity configuration method based on risk defense

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Embodiment Construction

[0045] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0046] The first step is to determine the state of health (State of Health, SOH) of each single battery in the cascade utilization reconstruction energy storage system, and establish the correlation characteristics of remaining capacity, state of charge (State of Charge, SOC) and SOH;

[0047] 1-1: The correlation characteristics between SOC and power output are:

[0048]

[0049] In the formula, P b_i (t) is the power output of the i-th energy storage battery at time t, SOC b_i (t), SOC b_i (t+1) is the state of charge of the i-th energy storage battery at time t and time t+1, C b_ie for the remaining capacity.

[0050] 1-2: The mathematical model of ESS life decay at time t is:

[0051]

[0052] In the formula, △α b_i (t) is the attenuation degree of battery life from t-1 to time t, α b_i (t) is the life attenuation degree, l b_i (t) is the li...

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Abstract

The invention discloses an echelon utilization reconstruction energy storage system capacity configuration method based on risk defense, and the method comprises the steps: firstly, setting a dynamicsafety margin in an echelon utilization process of a reconstruction energy storage system by considering inconsistent initial capacity of a retired power battery module, and effectively reducing the service life loss of a battery; secondly, comprehensively considering echelon utilization cycle cost and dynamic supply and demand balance characteristics of the reconstructed energy storage system tooptimize energy storage configuration; and finally, determining the charging and discharging characteristics of each battery module by adopting balance control according to the requirements of the configured object, and verifying whether the configured capacity meets the requirements of the configured object or not. According to the design method, the echelon utilization life loss of the retired power battery can be effectively reduced, reasonable optimal configuration of resources is realized, and the environmental benefit is increased.

Description

technical field [0001] The present invention relates to the technical field of cascade utilization of decommissioned power batteries, in particular to a risk defense-based cascade utilization of decommissioned power batteries and a capacity configuration method for reconfigured energy storage systems. Background technique [0002] With the adjustment of the automobile industry structure, electric vehicles are gradually replacing traditional fuel vehicles. When the electric vehicle travels for a certain distance, the performance of the power battery gradually declines. When the remaining capacity of the battery is between 70% and 80% of the nominal capacity, the power battery will be decommissioned from the electric vehicle and can be used in stages for the power system and backup power supply and other fields. Cascade utilization of decommissioned power batteries can effectively increase the value of its remaining life cycle and reduce environmental pollution and resource w...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/32H02J3/38H02J3/46
CPCH02J3/32H02J3/381H02J3/003H02J3/466H02J2203/20H02J2300/24H02J2300/28Y02E10/56
Inventor 颜宁张博马少华蔡志远
Owner SHENYANG POLYTECHNIC UNIV
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