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集成VSG频率调节与经济调度的微网分布式优化

来源：电工电气发布时间：2024-05-08 10:08 浏览次数：10

集成VSG频率调节与经济调度的微网分布式优化

杨鼎¹，余飏²，孙佳航³，李亮楷³

(1 中节能(五峰)风力发电有限公司，湖北宜昌 443000；

2 中国三峡建工（集团）有限公司，四川成都 610000；

3 三峡大学电气与新能源学院，湖北宜昌 443002)

摘要：在通信受限的情况下如何对低惯量孤岛运行的微网同时进行频率调节和综合经济调度，是目前需要解决的难点。建立了含多类型电源虚拟同步机(VSG)的微网调度控制模型，提出了一种集成频率调节与综合经济调度的分布式优化算法，来同时实现微网中的频率调节和经济调度。在综合考虑各类电源 VSG 成本和收益以及微网整体惯量和备用容量需求的基础上，提出了一个分布式经济调度问题，该问题最小化了各类型 VSG 参与频率调节所产生的综合成本并提高了微网在扰动下频率的稳定运行能力；在考虑微网逆变器的动态特性的基础上重构优化问题，利用事件触发通信在线感知和补偿供需失衡，解决了最优调度问题。仿真结果表明，所提方法能够避免跨时间尺度的层间协调，提高系统的惯量、调频能力以及经济性，并增强对短期通信故障的鲁棒性。

关键词： 虚拟同步机；频率调节；经济调度；分布式优化算法；孤岛微网

中图分类号：TM727 ；TM734 文献标识码：A 文章编号：1007-3175(2024)04-0034-09

Distributed Optimization of Microgrid Integrating VSG Frequency

Regulation and Economic Dispatch

YANG Ding¹, YU Yang², SUN Jia-hang³, LI Liang-kai³

（1 China Energy Conservation (Wufeng) Wind Power Company, Yichang 443000, China;

2 China Three Gorges Construction Engineering Corporation, Chengdu 610000, China;

3 College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443002, China）

Abstract: In the case of limited communication, how to carry out frequency regulation and comprehensive economic dispatch of microgrids operating in low inertia islands at the same time is a difficult point to be solved. In this paper, a microgrid dispatch control model establishment of virtual synchronous generator (VSG) a distributed optimization algorithm integrating frequency regulation and integrated economic scheduling is proposed to realize frequency regulation and economic dispatch in microgrid at the same time. A distributed economic dispatching problem that based on a comprehensive consideration of the costs and benefits of VSG of various power sources and the overall inertia and reserve capacity requirements of microgrids, minimizing the comprehensive cost caused by various VSG types participating in frequency regulation and improves the stable operation capability of microgrid under frequency disturbance. The optimal dispatch problem is then solved by considering the dynamic characteristics of microgrid inverters, the optimization problem is reconstructed, and bying event-triggered communication online perception and compensation for supply and demand imbalances. The simulation results show that the proposed method is able to avoid interlayer coordination across time scales, improve the inertia, frequency regulation ability and economy of the system, and enhance the robustness to short-term communication faults.

Key words: virtual synchronous generator; frequency regulation; economic dispatch; distributed optimization algorithm; isolated island microgrid

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