Virtual Impedance Current Limiting for Inverters in Microgrids With Synchronous Generators

被引：415
作者：
Paquette, Andrew D. [1 ]
Divan, Deepak M. [1 ]
机构：
[1] Georgia Inst Technol, Sch Elect & Comp Engn, Atlanta, GA 30332 USA
来源：
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS | 2015年 / 51卷 / 02期
关键词：
Current control; current limiting; generators; inverters; microgrids; virtual impedance; voltage control; CONTROL STRATEGY; OPERATION; AC;
D O I：
10.1109/TIA.2014.2345877
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This paper focuses on current limiting for voltage-controlled inverters during overloads caused by poor transient load sharing between inverters and synchronous generators in islanded microgrids. The use of simple current reference saturation limiters can cause instability when the voltage regulator loses control after the current reference saturates. The use of virtual impedance for current limiting is shown to improve transient stability during current limiting when operating in parallel with synchronous generators. Small-signal analysis is used to set the virtual impedance magnitude and X/R ratio, and validation is provided by simulation and experimental results.
引用
收藏
页码：1630 / 1638
页数：9
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