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电池储能单元群参与电力系统二次调频的功率分配策略
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

摘要:

大规模电池储能电站响应频繁的电力系统二次调频小额功率需求时,面临二次调频功率在电池储能单元群之间分配的问题,分配不当会劣化储能电站运行效率。文中分析了电池储能单元充放电功率对其能量转换效率的影响,构建了电池储能单元充放电功率-效率模型,提出使电池储能电站整体能量转换效率最大化的电池储能单元群功率分配策略。该策略可以提高电池储能电站运行效率、减小功率损失,同时在小额调频功率需求场景下可以减少电池储能单元响应数量和延长电池储能电站寿命。仿真分析验证了所提功率分配策略的有效性,与按比例功率分配策略和最大充放电功率分配策略对比结果表明,所提出的功率分配策略在提升电池储能系统运行效率以及减缓电池寿命衰减方面均具有优势。

关键词:

基金项目:

国家自然科学基金资助项目(U1766204),东北电力大学博士科研启动基金项目(BSJXM-2019101)

通信作者:

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

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。E-mail:yangg@neepu.edu.cn
刘莹(1993—),女,硕士研究生,主要研究方向:大规模电池储能。E-mail:2281018055@qq.com


Power Distribution Strategy for Battery Energy Storage Unit Group Participating in Secondary Frequency Regulation of Power System
Author:
Affiliation:

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

Abstract:

When the large-scale battery energy storage station responds to the small power demand of frequent power system secondary frequency regulation, it is faced with the power distribution problem of secondary frequency regulation among the battery energy storage unit groups and the improper distribution would degrade the operation efficiency of energy storage stations. This paper analyzes the influence of charging/discharging power of battery energy storage unit on its energy conversion efficiency, constructs the charging/discharging power-efficiency model of the battery energy storage unit, and proposes the power distribution strategy of battery energy storage unit group to maximize the overall energy conversion efficiency of battery energy storage station. This strategy can improve the operation efficiency of the battery energy storage station, reduce power loss, decrease the response quantity of the battery energy storage unit under the scenario of small frequency regulation power demand, and prolong the life of the battery energy storage station. Simulation analysis verifies the effectiveness of the proposed power distribution strategy, and the comparisons with the proportional power distribution strategy and the maximum charging/discharging power distribution strategy show that the proposed power distribution strategy has advantages in improving the operation efficiency of battery energy storage system and slowing down the battery life decay.

Keywords:

Foundation:
This work is supported by National Natural Science Foundation of China (No. U1766204) and Northeast Electric Power University PhD Research Foundation (No. BSJXM-2019101).
引用本文
[1]严干贵,刘莹,段双明,等.电池储能单元群参与电力系统二次调频的功率分配策略[J].电力系统自动化,2020,44(14):26-34. DOI:10.7500/AEPS20200116008.
YAN Gangui, LIU Ying, DUAN Shuangming, et al. Power Distribution Strategy for Battery Energy Storage Unit Group Participating in Secondary Frequency Regulation of Power System[J]. Automation of Electric Power Systems, 2020, 44(14):26-34. DOI:10.7500/AEPS20200116008.
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  • 收稿日期:2020-01-16
  • 最后修改日期:2020-04-13
  • 录用日期:
  • 在线发布日期: 2020-07-20
  • 出版日期:
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