基于MPC-VSG的孤岛微电网频率和电压动态稳定控制策略

doi:10.11930/j.issn.1004-9649.202302058

中国电力 ›› 2023, Vol. 56 ›› Issue (6): 51-60,81.DOI: 10.11930/j.issn.1004-9649.202302058

• 新能源电力系统稳定性分析与控制技术 • 上一篇下一篇

基于MPC-VSG的孤岛微电网频率和电压动态稳定控制策略

孙佳航¹, 王小华², 黄景光¹, 曹豪¹, 梅诺男¹, 李浙栋¹

1. 三峡大学电气与新能源学院，湖北宜昌 443002;
2. 国网浙江绍兴供电公司，浙江绍兴 312000

收稿日期:2023-02-16 修回日期:2023-06-02 出版日期:2023-06-28 发布日期:2023-07-04
作者简介:孙佳航（1999—），男，硕士研究生，从事新能源微电网与储能控制系统研究，E-mail：jiahangsun@163.com;王小华（1974—），男，硕士，从事电力系统输变电应用研究工作，E-mail：alexwon@gmail.com;黄景光（1968—），男，通信作者，博士，教授，从事电力系统自动化的研究，E-mail：hjg8008@sina.com
基金资助:
国家自然科学基金资助项目（52107095）。

MPC-VSG Based Control Strategy for Dynamic Stability of Frequency and Voltage in Islanded Microgrid

SUN Jiahang¹, WANG Xiaohua², HUANG Jingguang¹, CAO Hao¹, MEI Nuonan¹, LI Zhedong¹

1. College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443002, China;
2. State Grid Zhejiang Shaoxing Power Supply Company, Shaoxing 312000, China

Received:2023-02-16 Revised:2023-06-02 Online:2023-06-28 Published:2023-07-04
Supported by:
This work is supported by National Natural Science Foundation of China (No.52107095).

摘要/Abstract

摘要： 在高比例新能源孤岛微电网中，传统同步机（synchronous generator，SG）占比的减少将导致其整体惯量逐渐降低，传统控制策略无法在低惯量条件下对微电网的频率和电压进行有效的协同调节。为提高孤岛微电网频率和电压的动态稳定性，提出了一种基于模型预测控制（model predictive control，MPC）的储能虚拟同步机（virtual synchronous generator，VSG）频率-电压控制策略。通过建立VSG的预测模型，设计了频率和功率的成本函数，在计算出所需有功和无功功率的增量后，对VSG的功率基准值进行动态修正。考虑到SG和VSG之间的相互作用会降低系统的暂态电压稳定性，采用减小暂态期间SG和VSG之间的角度差的方式对电压控制环进行了改进，并对无功功率基准值做进一步调整。根据功率基准值实现对系统频率和电压的动态稳定控制。最后，仿真结果验证了该策略的有效性以及优越性。

关键词: 孤岛微电网, 模型预测控制, 虚拟同步机, 调频调压, 动态稳定性

Abstract: In a high proportion of new energy islanded microgrids, the reduction in the proportion of conventional synchronous generator (SG) will lead to a gradual decrease in their overall inertia. The conventional control strategy cannot effectively coregulate the frequency and voltage in microgrid under low inertia conditions. To simultaneously improve the dynamic stability of the frequency and voltage in the islanded microgrid, this paper proposes a model predictive control (MPC) based frequency-voltage control strategy for energy storage virtual synchronous generator (VSG). By developing a predictive model of VSG, a cost function of frequency and power is designed, and the power reference value of VSG is dynamically corrected after calculating the required active and reactive power increments. Considering that the interaction between SG and VSG reduces the transient voltage stability of the system, the voltage control loop is improved by reducing the angular difference between SG and VSG during transients, and the reactive power reference value is further adjusted. The dynamic stability control of the system frequency and voltage is achieved based on the power reference value. Finally, the simulation results verify the effectiveness of the strategy and the superiority.

Key words: islanded microgrid, model predictive control (MPC), virtual synchronous generator (VSG), frequency and voltage regulation, dynamic stability

孙佳航, 王小华, 黄景光, 曹豪, 梅诺男, 李浙栋. 基于MPC-VSG的孤岛微电网频率和电压动态稳定控制策略[J]. 中国电力, 2023, 56(6): 51-60,81.

SUN Jiahang, WANG Xiaohua, HUANG Jingguang, CAO Hao, MEI Nuonan, LI Zhedong. MPC-VSG Based Control Strategy for Dynamic Stability of Frequency and Voltage in Islanded Microgrid[J]. Electric Power, 2023, 56(6): 51-60,81.

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基于MPC-VSG的孤岛微电网频率和电压动态稳定控制策略

MPC-VSG Based Control Strategy for Dynamic Stability of Frequency and Voltage in Islanded Microgrid

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基于MPC-VSG的孤岛微电网频率和电压动态稳定控制策略

MPC-VSG Based Control Strategy for Dynamic Stability of Frequency and Voltage in Islanded Microgrid

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