A High Performance Controller for Parallel Operation of three-Phase UPSs Powering Unbalanced and Nonlinear Loads

S. M. Dehghan, A. Ale Ahmad, R. Lourakzadegan, M. Fazeli, M. Mohamadian, A. Abrishamifar

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

9 Citations (Scopus)

Abstract

In this paper, a high performance controller for parallel operation of uninterruptible power supplies (UPS) is proposed. The proposed controller is based on synchronous reference frame that is developed for parallel UPSs. Applying master-slave algorithm in this controller, power sharing and voltage regulation are controlled centrally by master UPS and commands are send through CAN bus to slave UPS. But each UPS performs voltage harmonic compensation locally and independently. Virtual impedance technique is used to share harmonic currents perfectly. Controller also is modified for unbalanced nonlinear loads. The performance of the proposed controller has been verified with simulation results for 20KVA, 380V three-phase parallel UPS.

Original languageEnglish
Title of host publication2011 2nd Power Electronics, Drive Systems and Technologies Conference, PEDSTC 2011
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages433-438
Number of pages6
ISBN (Electronic)9781612844213
ISBN (Print)9781612844220
DOIs
Publication statusPublished - 5 Apr 2011
Externally publishedYes
Event2nd Power Electronics, Drive Systems and Technologies Conference - Tehran, Iran, Islamic Republic of
Duration: 16 Feb 201117 Feb 2011
Conference number: 2

Conference

Conference2nd Power Electronics, Drive Systems and Technologies Conference
Abbreviated titlePEDSTC 2011
CountryIran, Islamic Republic of
CityTehran
Period16/02/1117/02/11

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