A Control scheme of the DG interface for fast load voltage regulation and enective mitigation of unbalanced voltage disturbances

Y. A.R.I. Mohamed, E. F. El-Saadany

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

4 Scopus citations

Abstract

This paper presents a control scheme for grid-connected pulse-width-modulated (PWM) voltage-sourced inverters (VSIs) featuring fast load voltage regulation and effective mitigation of unbalanced voltage disturbances. To ensure perfect regulation of the voltage at the point of common coupling (PCC) and provide means for rejecting fast and dynamic voltage disturbances, the frequency modes of the disturbances to be eliminated should be included in the stable closed loop system. Toward this, a hybrid voltage controller combining a linear with variable-structure control (VSC) element is proposed to for an inverter-based distributed generation (DG) interface to regulate the voltage at the PCC. The proposed voltage controller can embed a wide band of frequency modes through an equivalent internal model. Subsequently, wide range of voltage perturbations, including capacitor-switching disturbances, can be rejected. To account for unbalanced voltage disturbances, a dual-sequence voltage controller is proposed. To provide accurate and robust tracking of the generated current trajectory, a newly designed deadbeat current controller is adopted. Theoretical analysis and comparative evaluation tests are presented to demonstrate the effectiveness of the proposed control scheme.

Original languageBritish English
Title of host publicationPESC '08 - 39th IEEE Annual Power Electronics Specialists Conference - Proceedings
Pages2453-2459
Number of pages7
DOIs
StatePublished - 2008
EventPESC '08 - 39th IEEE Annual Power Electronics Specialists Conference - Rhodes, Greece
Duration: 15 Jun 200819 Jun 2008

Publication series

NamePESC Record - IEEE Annual Power Electronics Specialists Conference
ISSN (Print)0275-9306

Conference

ConferencePESC '08 - 39th IEEE Annual Power Electronics Specialists Conference
Country/TerritoryGreece
CityRhodes
Period15/06/0819/06/08

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