弱电网下VSG的有功响应特性分析及优化策略

石荣亮; 兰才华; 周卢婧; 刘维莎; 周其锋

doi:10.19912/j.0254-0096.tynxb.2023-0593

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太阳能学报 ›› 2024, Vol. 45 ›› Issue (8) : 182-189. DOI: 10.19912/j.0254-0096.tynxb.2023-0593

弱电网下VSG的有功响应特性分析及优化策略

石荣亮^1,2, 兰才华^1,2, 周卢婧^1,2, 刘维莎^1,2, 周其锋^1,2

作者信息 +

ANALYSIS AND IMPROVEMENT STRATEGY OF VSG ACTIVE POWER RESPONSE CHARACTERISTICS UNDER WEAK GRID

Shi Rongliang^1,2, Lan Caihua^1,2, Zhou Lujing^1,2, Liu Weisha^1,2, Zhou Qifeng^1,2

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文章历史 +

摘要

为了提高虚拟同步机（VSG）在弱电网下的并网有功响应速度,提出一种虚拟负阻抗结合有功暂态阻尼控制的VSG并网有功动态响应优化策略。该控制策略首先利用虚拟负阻抗控制环节减小VSG的等效输出阻抗及其并网有功的动态响应时间,然后利用有功暂态阻尼控制环节增强VSG的暂态阻尼及其并网有功动态振荡的抑制能力。最后利用Matlab/Simulink仿真软件研究所提控制策略在有功功率指令阶跃下VSG的并网有功动态响应性能,并建立VSG并网系统的实验测试平台,仿真与实验结果验证了所提策略在提升弱电网下VSG的并网有功动态响应特性方面的可行性与优越性。

Abstract

In order to improve the grid-connected active power （GCAP） response speed of Virtual Synchronous Generator （VSG） under weak power grid, an optimization strategy of GCAP dynamic response for VSG based on the virtual negative impedance combined with the active power transient damping control algorithm is proposed in this paper. The optimization strategy firstly uses the virtual negative impedance control link to reduce the VSG equivalent output impedance as well as the GCAP dynamic response time of VSG. Then, the transient damping of VSG and the inhibition ability of GCAP dynamic oscillation are enhanced by the active power transient damping control link. In addition, the Matlab/Simulink simulation software is used to study the GCAP dynamic response performance of VSG in the condition of active power command step, and the experimental test platform of VSG grid-connected system is established. Finally, the simulation and experimental results verify the feasibility and superiority of the proposed strategy in improving the GCAP dynamic response characteristics of VSG under a weak grid.

导出引用

石荣亮, 兰才华, 周卢婧, 刘维莎, 周其锋. 弱电网下VSG的有功响应特性分析及优化策略[J]. 太阳能学报. 2024, 45(8): 182-189 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0593

Shi Rongliang, Lan Caihua, Zhou Lujing, Liu Weisha, Zhou Qifeng. ANALYSIS AND IMPROVEMENT STRATEGY OF VSG ACTIVE POWER RESPONSE CHARACTERISTICS UNDER WEAK GRID[J]. Acta Energiae Solaris Sinica. 2024, 45(8): 182-189 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0593

中图分类号： TM712

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