通过完全执行的错误模型来实现直流MG的平均电压恢复和电流共享的分布式二次控制
IEEE transactions on cybernetics
|August 7, 2025
概括
本研究介绍了基于转换器的直流微电网 (MG) 的新型错误模型,使统一的电压调节和电流平衡成为可能. 拟议的分布式最佳控制确保了DC MGs的稳定性和高效的功率共享.
科学领域:
- 电气工程 电气工程
- 控制系统 控制系统
- 可再生能源系统可再生能源系统
背景情况:
- 基于转换器的多总线直流微电网 (MGs) 在平衡电压调节和电流共享方面面临挑战,原因是线路阻抗.
- 现有的直流MG模型往往缺乏准确性和简单性之间的平衡,阻碍了基于模型的二次控制研究.
- 电压稳定性和电源质量对MGs至关重要,而有效的电流共享可以延长发电机组的寿命.
研究的目的:
- 为DC MGs开发一个简化但准确的错误模型,该模型包含电路和内部控制循环的动态.
- 提出一个分布式的最佳控制策略,以解决电压调节和电流平衡之间的冲突.
- 通过理论分析和实验实施来验证拟议的模型和控制方法.
主要方法:
- 使用FA系统理论开发DC MG错误模型,捕获功率特征和控制循环动态.
- 基于统一调节错误的分布式最佳控制的设计,用于电压恢复和电流分配.
- 闭环MG系统的稳定性分析,包括对电流共享的共识分析和对平均电压的跟踪分析.
主要成果:
- 拟议的错误模型通过将电压和电流调节目标统一为单个错误项提供了一种新的方法.
- 分布式最佳控制证明了有效的电压恢复和精确的电流分配,解决了固有的冲突.
- 理论分析证实了闭环系统的稳定性以及电流共享和电压跟踪的有效性.
结论:
- 开发的错误模型和分布式最佳控制为基于转换器的直流MG管理提供了强大而高效的解决方案.
- 统一的方法简化了控制设计,同时在电压稳定性和电流共享方面提高了性能.
- 实验验证实验室规模的MG原型证实了拟议方法的实际适用性和有效性.
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