Stability analysis of AC microgrids with constant power loads based on Popov's absolute stability criterion

Karimipour, Dena and Salmasi, Farzad R. (2015) Stability analysis of AC microgrids with constant power loads based on Popov's absolute stability criterion. IEEE Transactions on Circuits and Systems Part II: Express Briefs, 62 (7). 696 -700. ISSN 1549-7747

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Abstract

This brief considers nonlinear stability analysis of ac microgrids with constant power loads (CPLs). A microgrid is a subsystem consisting of small electrical resources, local loads, and power electronic devices. It should be noted that the presence of a CPL as a sink in a microgrid results in nonlinear behavior of the microgrid. CPLs are generally connected to an ac microgrid through a controlled rectifier and/or dc-dc converters. We model an ac microgrid with local RLC load and a CPL with power converter subsystem, which results in a set of nonlinear state-space equations. Then, Popov's absolute stability theorem is utilized to analyze stability conditions for an ac microgrid in the presence of CPL. Simulation results are presented, which are in agreement with the analytical approach.

Item Type: Article
Uncontrolled Keywords: Stability analysis, dc-dc converters, controlled rectifier, nonlinear behavior, power electronic devices, local loads, small electrical resources, CPL, Popov absolute stability criterion, constant power loads, AC microgrids
Subjects: Construction and engineering
Depositing User: Farzad Rajaei Salmasi
Date Deposited: 17 Jun 2016 09:21
Last Modified: 26 May 2017 09:08
URI: http://repository.uwl.ac.uk/id/eprint/2572

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