Impedance-Based Stability Analysis of Droop-Controlled AC Microgrids with the Generalized Nyquist Criterion

被引：0
|
作者：
Strunk, Robin [1 ]
Mertens, Axel [1 ]
机构：
[1] Leibniz Univ Hannover, Inst Drive Syst & Power Elect, Welfengarten 1, D-30163 Hannover, Germany
来源：
2023 25TH EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS, EPE'23 ECCE EUROPE | 2023年
关键词：
Droop control; Impedance analysis; Small-signal stability; Islanded operation;
D O I：
暂无
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
An impedance model of a droop-controlled inverter is derived analytically. The cross-coupling between a distortion frequency and its mirrored frequency component is considered. This requires the impedance to be modeled as a MIMO system. An impedance-based stability analysis of a microgrid with two grid-forming inverters is performed. The results are validated by a laboratory test. This shows how the P-omega droop coefficient affects the stability of a microgrid and how the instability can be predicted with the analytical model.
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页数：10
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