A High Performance Controller for Parallel Operation of three-Phase UPSs Powering Unbalanced and Nonlinear Loads
Publish Year: 1389
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
PEDSTC02_109
تاریخ نمایه سازی: 21 تیر 1391
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.
Keywords:
Uninterruptible power supplies (UPS) , Parallel operation , Synchronous reference frame controller (SRFC)
Authors
Dehghan
Electrical and Computer Engineering Department, Tarbiat Modares University
ahmad ale ahmad
Department of Electrical Engineering, Iran University of Science and Technology (IUST)
lourakzadegan
Electrical Converters & Power Systems Dept., IRIEE, ACECR, I.R.Iran.
fazeli
Electrical Converters & Power Systems Dept., IRIEE, ACECR, I.R.Iran.
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