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在基于光伏的直流微电网中,用于SoC平衡的新型自适应性掉落控制策略

Boxi Li¹, Chang Yu², Xiaoqing Lu³

¹Hubei Collaborative Innovation Center for High-efficiency Utilization of Solar Energy, Hubei University of Technology, Wuhan 430068, PR China.

ISA transactions

|August 28, 2023

概括

本研究介绍了电池储能系统 (BESS) 的自适应性掉落控制策略,以平衡DC微电网中的电荷状态 (SoC),通过光伏发电提高性能.

科学领域:

电气工程电气工程
可再生能源系统可再生能源系统
控制系统控制系统

背景情况:

电池储能系统 (BESS) 对于在直流微电网中缓冲不可预测的光伏 (PV) 功率至关重要.
在BESS中保持充电状态 (SoC) 平衡是稳定的微电网运行面临的关键挑战.
传统的PI控制器限制了BESS转换器中的电压响应速度.

研究的目的:

开发一种新的自适应性掉落控制策略,以提高DC微电网内的BESS中的SoC平衡.
为了提高BESS转换器的电压响应速度和短暂性能.
为了提高BESS的稳定性来应对光伏输出功率的波动性.

主要方法:

实现了一个集成的前滑动模式控制器 (SMC),以取代传统的PI控制器,以改善转换器电压响应.
提出了基于SoC级别的合作BESS操作的三种不同的工作模式的新型自适应性垂落控制策略.
通过使用Simulink/SimPower系统在DC微电网环境中的模拟来验证战略.

主要成果:

集成的前SMC显著提高了BESS转换器的电压响应速度.
拟议的自适应性降落控制策略有效地平衡了SoC在不同模式下运行的多个电池之间.
与现有方法相比,该策略显示了较好的过渡性性能和对光伏功率波动的稳定性.

结论:

新的自适应性降落控制策略为光伏集成直流微电网BESS中的SoC平衡提供了有效的解决方案.
增强的控制器设计在动态操作条件下提高了系统稳定性,效率和可靠性.
提出的方法为在可再生能源应用中管理BESS提供了显著的进步.

关键词:

电池储能系统是电池中的储能系统.电流微电网是直流的微电网.滑动模式控制器的控制器在 SoC 余额中保持 SoC 余额.稳定的稳定性稳定的稳定性

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