使用完全扩散策略的分布式储能设备的控制策略
Zejian Liu1, Ping Yang1, Xu Lin2
1Key Laboratory of Clean Energy Technology of Guangdong Province, School of Electric Power Engineering, South China University of Technology, Guangzhou, 510640, China.
Heliyon
|February 11, 2025
概括
一个新的扩散策略通过协调电池充电水平来增强分布式能源存储系统,提高可靠性和性能,相比传统方法.
科学领域:
- 电气工程 电气工程
- 控制系统 控制系统
- 储能 储能 储能 储能 储能 储能
背景情况:
- 在直流储能站 (ESS) 中的分布式储能单元 (ESU) 面临由于初始充电状态 (SOC) 不确定而导致的电荷不平衡 (过充/不足).
- 这些不平衡可以显著减少ESU的运行寿命.
- 对于复杂的分布式系统,现有的控制方法可能缺乏可扩展性和可靠性.
研究的目的:
- 为直流储能系统提出一种新的分布式二次控制策略.
- 为了应对不确定的初始SOC的挑战,并改善ESU的寿命.
- 为了提高系统的可扩展性,可靠性和需求响应能力.
主要方法:
- 实施双层控制架构:每个ESU的本地垂落控制和协调控制的第二层.
- 在第二层使用扩散策略来管理多个分布式ESU之间的SOC和输出电压平衡.
- 将协调控制转化为两个优化问题:平衡输出电压和平衡SOC.
- 采用与随机梯度项的扩散策略来解决这些优化问题.
主要成果:
- 拟议的扩散策略确保了跨各种网络拓的系统稳定性.
- 与共识策略相比,它显示出更高的收率和更低的平均平方误差.
- 通过模拟模型验证的有效性,显示分布式ESU的需求响应性能优越.
结论:
- 基于扩散的二次控制有效地协调分布式ESU与不确定的初始SOC.
- 这种方法比集中控制方法提供了更好的可扩展性和可靠性.
- 该战略显示,与分布式储能系统的需求响应共识方法相比,该战略具有显著的优势.
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