Voltage Control Based on Improved Multiple Loop Virtual Synchronous Generator

LI Jun; HU Chuanyi; YAN Hui; CHU Lingjie

doi:10.14044/j.1674-1757.pcrpc.2018.06.029

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Voltage Control Based on Improved Multiple Loop Virtual Synchronous Generator

更新时间：2024-09-14

- Voltage Control Based on Improved Multiple Loop Virtual Synchronous Generator
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 39, Issue 6, Pages: 151-156(2018)
- 作者机构：
  
  1. 南京工程学院
  2. 国网江苏省电力有限公司新沂市供电分公司
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2018.06.029
  CLC： TM341
- Published：2018，
- 稿件说明：
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[1]李军,胡传意,颜辉,褚铃杰.基于改进多环虚拟同步发电机的电压控制[J].电力电容器与无功补偿,2018,39(06):151-156+162.

LI JUN, HU CHUANYI, YAN HUI, et al. Voltage Control Based on Improved Multiple Loop Virtual Synchronous Generator. [J]. Power capacitor & reactive power compensation, 2018, 39(6): 151-156.
[1]李军,胡传意,颜辉,褚铃杰.基于改进多环虚拟同步发电机的电压控制[J].电力电容器与无功补偿,2018,39(06):151-156+162. DOI： 10.14044/j.1674-1757.pcrpc.2018.06.029.

LI JUN, HU CHUANYI, YAN HUI, et al. Voltage Control Based on Improved Multiple Loop Virtual Synchronous Generator. [J]. Power capacitor & reactive power compensation, 2018, 39(6): 151-156. DOI： 10.14044/j.1674-1757.pcrpc.2018.06.029.

摘要

在虚拟同步发电机（virtual synchronous generator

VSG）控制中

由于线性下垂特性的限制

VSG输出电压在负荷变化过程中会出现波动过快以及偏移过大现象。针对这一问题

提出一种改进多环虚拟同步发电机控制方法。首先

在VSG无功-电压控制中引入虚拟励磁

解决负荷变化引起的电压快速波动问题。其次

对线性无功—电压下垂曲线进行改进

设计一种变系数无功—电压下垂曲线

可在负荷突增的情况下保证VSG无功输出并使得电压偏移减小。最后

结合电压电流双闭环控制

可以有效保证VSG供电电能质量。通过Matlab/Simulink仿真软件搭建了微电网仿真模型并进行仿真

仿真结果证明了该控制策略的可行性与有效性。

Abstract

In the control of virtual synchronous generator（VSG）

such phenomenon as fast fluctuation andbig offset of VSG output voltage is happened during the load variation due to limitation of linear sag charac-teristics. In view of this problem

a multiple loop virtual synchronous generator control method is proposedin this paper. Firstly

the virtual excitation is introduced in reactive power-voltage control of VSG to solvethe problem of fast voltage fluctuation caused by load variation. Secondly

a kind of variable coefficient re-active-voltage sag curve is designed by the improvement of the linear reactive-voltage sag curve so to assureVSG reactive power output and reduce voltage offset in case of sudden increase of load. Finally

combina-tion with voltage current double closed loop control can assure effectively power quality of VSG power sup-ply. Simulation model of micro-grid is set up by Matlab/Simulink simulation software and simulation is per-formed. The feasibility and effectiveness of the control strategy is verified by the simulation result.

关键词

虚拟同步发电机电压二次控制微电网虚拟励磁电能质量

Keywords

virtual synchronous generatorsecondary voltage controlmicro-gridvirtual excitationpower quality

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