Hierarchical Frequency Control Strategy of Microgrids with Virtual Synchronous Generators

CHEN Meng; XIAO Xiangning; LAI Baizhu

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Hierarchical Frequency Control Strategy of Microgrids with Virtual Synchronous Generators

更新时间：2025-12-08

- Hierarchical Frequency Control Strategy of Microgrids with Virtual Synchronous Generators
- Vol. 44, Issue 4, Pages: 1278-1284(2018)
- 作者机构：
  
  1. 华北电力大学新能源电力系统国家重点实验室
  2. 国网浙江省电力公司杭州供电公司
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：10 May 2018，
  
  Published：2018
- 稿件说明：
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CHEN Meng, XIAO Xiangning, LAI Baizhu. Hierarchical Frequency Control Strategy of Microgrids with Virtual Synchronous Generators[J]. 2018, 44(4): 1278-1284.
DOI：

CHEN Meng, XIAO Xiangning, LAI Baizhu. Hierarchical Frequency Control Strategy of Microgrids with Virtual Synchronous Generators[J]. 2018, 44(4): 1278-1284. DOI：

摘要

为提高孤岛微电网运行时的频率稳定性

提出了一种基于旋转同步坐标系的微电网分层控制策略。其中底层控制采用电压电流双环控制

实现快速跟踪

改善波形质量;一次频率控制采用虚拟同步发电机控制及有功–频率下垂控制

提高系统惯性

增强稳定性

并对一次频率控制的不同实现方法进行了比较

讨论了阻尼系数与下垂系数间的联系;针对通信延迟引起二次控制性能下降的问题

设计了基于内模控制的二次频率控制。最后利用一个含多种逆变电源控制方式的微网系统对所提控制策略进行了验证。结果表明

该策略具有较好的稳态和动态特性

基于内模控制的二次频率控制在考虑通信延迟的情况下仍具有较好的控制性能。

Abstract

To improve the frequency stability of islanded microgrid

we propose a hierarchical frequency control scheme based on the synchronous reference frame

in which the inner control level consists of voltage and current loops for tracking quickly and improving the quality of waveforms.The virtual synchronous generator with power-frequency droop mechanism is used for primary control in order to increase inertia and improve the stability of the microgrid.Then a frequency restoring strategy

i.e.

secondary control is developed based on the internal model control.The effectiveness of the proposed control method is verified using a microgrid test system

which includes inverters with different kinds of control strategies

in PSCAD/EMTDC.The results show good robustness of the proposed secondary frequency control strategy based on the internal model control even considering communication delays.

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Related Institution

Tiexi Branch Company,Shenyang Power Supply Company

Department of Automation,Shenyang Institute of Engineering

Electricity Regulatory Bureau,National Energy Administration

Key Laboratory of Power Network Energy Saving and Control Liaoning Province,Department of Engineering,Shenyang Institute of Engineering

School of Electrical Engineering, Shenyang University of Technology

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