虚拟同步发电机在与异质电源供应隔离的岛屿微电网中的短暂功率均等控制策略
Changwei Gao1, Yongchang Sun2, Weiqiang Zheng3
1College of Electrical and Automation Engineering, Liaoning Institute of Science and Technology, Benxi, 117004, China. gaochangwei2008@163.com.
Scientific reports
|August 3, 2023
概括
本研究引入了一种新的控制方法,用于同步发电机和虚拟同步发电机的并行操作. 该方法在负载变化期间确保了均的电力分配,提高了系统稳定性和虚拟同步发电机的利用率.
科学领域:
- 电气工程 电气工程
- 电力系统 电力系统
- 控制系统 控制系统
背景情况:
- 同步发电机 (SG) 和虚拟同步发电机 (VSG) 的并行运行,由于不同的控制结构,在短暂的电力共享方面面临着挑战.
- 突发的负载变化,特别是增加,可能导致VSG承受过度负载,导致临时超载和容量不足.
研究的目的:
- 为了解决平行运行中SG和VSG之间不均的短暂功率分配问题.
- 增强VSG控制以模仿SG特征,以改善权力共享.
- 为了使VSGs在独立和并行操作之间实现无模式切换.
主要方法:
- 基于频率调制,电压调节和输出阻抗差异的短暂功率不均分布机制的分析.
- 通过虚拟速度调节,虚拟激发和动态虚拟阻抗来增强传统的VSG控制.
- 实现基于状态跟踪的模式切换控制链路,以实现平稳的过渡.
主要成果:
- 在并行运行期间,在SG和VSG之间展示过渡和稳定状态功率均等.
- 在独立操作模式下维护VSG的快速电压调节和频率调制能力.
- 成功实现了独立和并行操作模式之间的平滑切换.
结论:
- 拟议的控制策略有效地平衡了平行运行的异构电源之间的电力共享.
- 增强的VSG控制确保了稳定的电网集成和高效的资源利用.
- 开发的模式切换机制保证了操作灵活性和可靠性.
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