含直流侧储能的柔性互联交流微电网群分布协调控制策略

doi:10.19799/j.cnki.2095-4239.2025.0626

摘要/Abstract

摘要：

含直流侧储能的柔性互联交流微电网群有着比传统微电网群更加明显的优势，具有重要研究意义，但是已有针对此类型微电网的控制策略研究较少。因此，本文针对含直流侧储能和多个互联换流器(Interlinking Voltage Source Converter，IVSC)的柔性互联交流微电网群系统进行分析和研究。首先建立了柔性互联交流微网群的分层分布式协调控制架构，包含本地控制层、微网控制层以及集群协调控制层。然后，针对微网控制层，提出了分布式二次频率控制器以及分布式二次电压控制器，实现微网内部功率分配、频率/平均电压恢复的控制目标；针对集群协调控制层，基于微网之间关键电气量归一化原理和有限时间一致性算法，提出了多柔直IVSC的分布式对等协调控制策略，在维持直流配电母线电压稳定的同时，实现互联微电网间的功率按比例分配等控制目标。最后，利用Matlab/Simulink搭建仿真模型，验证了控制策略的有效性。

关键词: 微电网群, 直流侧储能, 柔性互联, 分布式协调控制, 分层控制

Abstract:

The flexible interconnected AC microgrid clusters with DC energy storage has more obvious advantages than the traditional microgrid group, and has important research significance. However, there are few studies on the control strategy of this type of microgrid. Therefore, this paper analyzes and studies the flexible interconnected AC microgrid cluster system with DC-side energy storage and multiple Interlinking Voltage Source Converters ( IVSC ). Firstly, a hierarchical distributed coordinated control architecture of flexible interconnected AC microgrid cluster is established, including local control layer, microgrid control layer and cluster coordinated control layer. Then, for the microgrid control layer, a distributed secondary frequency controller and a distributed secondary voltage controller are proposed to achieve the control objectives of power distribution and frequency / average voltage recovery within the microgrid. Aiming at the cluster coordinated control layer, based on the normalization principle of key electrical quantities between microgrids and the finite-time consistency algorithm, a distributed peer-to-peer coordinated control strategy of multi-flexible IVSC is proposed. While maintaining the stability of DC distribution bus voltage, it can also achieve the control goal of power proportional distribution between interconnected microgrids. Finally, the simulation model is built by Matlab / Simulink to verify the effectiveness of the control strategy.

Key words: Micro-grid cluster, Sharing energy storage, Flexible interconnection, Distributed coordinated control, Hierarchical control

刘方洲, 陈纪桥, 崔泽颖, 赵阳, 裘皓宇. 含直流侧储能的柔性互联交流微电网群分布协调控制策略[J]. 储能科学与技术, doi: 10.19799/j.cnki.2095-4239.2025.0626.

Fangzhou LIU, Jiqiao CHEN, Zeying CUI, Yang ZHAO, Haoyu QIU. Distributed coordinated control strategy of flexible interconnected AC microgrid group with DC-side energy storage[J]. Energy Storage Science and Technology, doi: 10.19799/j.cnki.2095-4239.2025.0626.

图/表 12

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表1

柔性互联交流微网群主要参数"

控制参数	值	单位
交流母线电压	380	V
直流侧母线电压	750	V
交流侧频率上下限	50.5/49.5	Hz
直流侧储能电压上下限	712.4/787.5/750*(1 $±$ 5%)	V
各个子系统 $P m a x$	120/120/60/120	kW
负荷1/2/3/4	60/60/30/60	kW
直流侧储能系统n_i 比例	2:2:1	/
交流微网系统m_i 比例	1:1:2	/

表1

图7

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