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考虑铅炭电池组一致性的储能系统功率控制策略
作者:
作者单位:

现代电力系统仿真控制与绿色电能新技术教育部重点实验室(东北电力大学),吉林省吉林市 132012

作者简介:

严干贵(1971—),男,博士,教授,博士生导师,主要研究方向:新能源发电运行控制、大规模储能技术应用和电力系统稳定与控制等。
朱微(1994—),女,硕士研究生,主要研究方向:电池储能在电力系统中的应用。E-mail:18351926835@163.com
段双明(1984—),男,通信作者,博士,实验师,主要研究方向:新能源发电运行控制。E-mail:duansm@neepu.edu.cn

通讯作者:

段双明(1984—),男,通信作者,博士,实验师,主要研究方向:新能源发电运行控制。E-mail:duansm@neepu.edu.cn

基金项目:

东北电力大学博士科研启动基金资助项目(BSJXM-2019101);国家自然科学基金资助项目(U1766204);国家电网公司科技项目(18-GW-05)。


Power Control Strategy of Energy Storage System Considering Consistency of Lead Carbon Battery Pack
Author:
Affiliation:

(Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Ministry of Education (Northeast Electric Power University), Jilin 132012, China)

Fund Project:

This work is supported by Northeast Electric Power University PhD Research Foundation (No. BSJXM-2019101), National Natural Science Foundation of China (No. U1766204) and State Grid Corporation of China (No. 18-GW-05).

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    摘要:

    针对储能系统不规则充放电导致的电池组一致性变差及单体电池过充/过放问题,研究铅炭电池组一致性变化规律,提出考虑电池组一致性的储能系统功率控制策略。采用包含储能电池组、风/光发电、电动汽车和常规负荷的共直流母线型集中式微电网并网示范平台的实测数据对所提功率控制策略与传统控制策略进行对比仿真分析。仿真结果表明,所提控制策略可有效降低电池组荷电状态(SOC)变化范围,提升电池健康状态,提高电池组一致性,减少过放电池数量,增强储能系统双向调节能力。

    Abstract:

    In order to solve the problem of battery consistency variation and overcharge/overdischarge caused by irregular charging and discharging of energy storage system, the consistency of lead carbon battery pack is studied and the power control strategy of energy storage system considering battery consistency is proposed. The proposed power control strategy is compared with the traditional strategy by using the actual operation data of grid-connected demonstration platform of centralized microgrid with common DC bus. The platform includes energy storage battery pack, wind/photovoltaic power generation, electric vehicles and conventional loads. The simulation results show that the proposed control strategy can effectively reduce the state of charge (SOC) range of battery pack, improve battery health and battery pack consistency, reduce the number of overdischarged batteries and enhance the bidirectional adjustment capability of energy storage system.

    表 2 Table 2
    表 3 Table 3
    表 4 Table 4
    图1 10 A电流充电时的电压波形Fig.1 Voltage waveform when charging with 10 A current
    图2 综合控制策略流程图Fig.2 Flow chart of integrated control strategy
    图3 储能电池组SOCFig.3 SOC of energy storage battery pack
    图4 储能电池组电压极差Fig.4 Voltage range of energy storage battery pack
    图5 不同权重组合下的储能电池组SOCFig.5 SOC of energy storage battery pack with different weight combinations
    图 共直流母线微电网并网系统Fig. Common DC bus microgrid grid-connected system
    图 不同充电电流对应的电压和SOC关系曲线Fig. Relationship between battery voltage and SOC in different charge currents
    图 不同放电电流对应的电压和SOC关系曲线Fig. Relationship between battery voltage and SOC in different discharge currents
    图 边界SOC对应的最大充电电流Fig. Maximum charge current in different boundary of SOC
    图 边界SOC对应的最大放电电流Fig. Maximum discharge current in different boundary of SOC
    图 并网点功率和并网目标功率Fig. Grid-connected power and grid-connected target power
    图 储能电池组功率Fig. Power of energy storage battery pack
    图 储能电池组电压标准差Fig. Voltage standard deviation of energy storage battery pack
    图 储能电池组SOCFig. SOC of energy storage battery pack
    表 1 不同功率控制策略下的指标对比(初始SOC等于24%)Table 1 Cmparison of indices with different power control strategies (initial SOC equals 24%)
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引用本文

严干贵,朱微,段双明,等.考虑铅炭电池组一致性的储能系统功率控制策略[J].电力系统自动化,2020,44(11):61-67. DOI:10.7500/AEPS20190911004.
YAN Gangui,ZHU Wei,DUAN Shuangming,et al.Power Control Strategy of Energy Storage System Considering Consistency of Lead Carbon Battery Pack[J].Automation of Electric Power Systems,2020,44(11):61-67. DOI:10.7500/AEPS20190911004.

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  • 收稿日期:2019-09-11
  • 最后修改日期:2019-12-08
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  • 在线发布日期: 2020-05-28
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