文章摘要
廖丽,张昌华,刘倪,等.具有鲁棒特性的虚拟同步发电机无功电压环节参数设计[J].电力系统自动化. DOI: 10.7500/AEPS20181121003.
LIAO Li,ZHANG Changhua,LIU Ni, et al.Parameter Design of Reactive Power-Voltage Loop of Robust VSG[J].Automation of Electric Power Systems. DOI: 10.7500/AEPS20181121003.
具有鲁棒特性的虚拟同步发电机无功电压环节参数设计
Parameter Design of Reactive Power-Voltage Loop of Robust VSG
DOI:10.7500/AEPS20181121003
关键词: 虚拟同步发电机  小信号模型  同步发电机励磁系统参数  无功电压环  参数设计
KeyWords: VSG  small signal model  synchronous generator excitation system parameter  Reactive power-voltage loop  Parameter design
上网日期:2019-05-15
基金项目:国家自然科学基金;四川省科技厅重点研发计划
作者单位E-mail
廖丽 电子科技大学 1830736925@qq.com 
张昌华 电子科技大学 zhangchanghua@uestc.edu.cn 
刘倪 电子科技大学 1092734906@qq.com 
陈昕 重庆邮电大学 1830736925@qq.com 
陈树恒 电子科技大学 1830736925@qq.com 
刘群英 电子科技大学 1830736925@qq.com 
摘要:
      虚拟同步发电机(Virtual synchronous generator, VSG)是近年来并网逆变器控制策略研究中的热点,但关于其无功电压环节参数设计的研究目前并不多见。本文以具有鲁棒特性的VSG为例,通过建立端电压设定值与其输出电压和无功功率之间的小信号模型,然后利用增益对比分析实现了无功电压环节和有功环节的解耦,得到了二阶形式的VSG无功电压环节数学模型。借鉴IEEE和IEC推荐的同步发电机(Synchronous generator, SG)励磁系统参数设计依据,实现VSG无功电压环节参数的设计。仿真和实验验证了该方法的正确性与有效性。研究成果有助于完善VSG的设计。
Abstract:
      Virtual synchronous generator (VSG) is a hotspot in the control strategy research of grid-connected inverters in recent years, but the research on the parameter design of VSG reactive power-voltage loop is rare.This paper takes robust VSG as an example, establishes small signal model between its reference voltage and output reactive power&voltage. Coupling effect between reactive power-voltage loop and active power loop can be ignored though gain comparison analysis, then a second-order mathematical model of the output reactive power&voltage of VSG is obtained. Referring to excitation system parameters design requirements of synchronous generator (SG) recommended by IEEE and IEC, the parameters of VSG reactive power-voltage loop are designed. Finally, simulation and experiment results verify the effectiveness of the aforementioned method. The research is beneficial to the controller design of VSG.
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