文章基本信息

标题：Passivity Conditions for Plug-and-Play Operation of Nonlinear Static AC Loads
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作者：Felix Strehle ; Albertus J. Malan ; Stefan Krebs 等
期刊名称：IFAC PapersOnLine
印刷版ISSN：2405-8963
出版年度：2020
卷号：53
期号：2
页码：12237-12243
DOI：10.1016/j.ifacol.2020.12.1128
语种：English
出版社：Elsevier
摘要：AbstractThe complexity arising in AC microgrids from multiple interactingdistributed generation units(DGUs) with intermittent supply behavior requires localvoltage-source inverters(VSIs) to be controlled in a distributed or decentralized manner at primary level. In (Strehle et al., 2019a), we use passivity theory to design decentralized, plug-and-play voltage and frequency controllers for such VSIs. However, the stability analysis of the closed-loop system requires a load-connected topology, in contrast to real grids where loads are arbitrarily located. In this paper, we expand our former approach by considering the more realistic and general case of nonlinear static AC loads (ZIP and exponential) at arbitrary locations within an AC microgrid. Investigating the monotonicity of differentiable mappings, we derive sufficient inequality conditions for the strict passivity of these nonlinear static AC loads. Together with our plug-and-play VSI controller, this allows us to use passivity arguments to infer asymptotic voltage and frequency stability for AC microgrids with arbitrary topologies. An illustrative simulation validating our theoretical findings concludes our work.
关键词：KeywordsAC MicrogridsPassivityVoltage StabilityAC loads