Offset rejection for PLL based synchronization in grid-connected converters

Mihai Ciobotaru, Remus Teodorescu, Vassilios G. Agelidis

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

123 Citations (Scopus)

Abstract

Grid-connected converters rely on fast and accurate detection of the phase angle, amplitude and frequency of the utility voltage to guarantee the correct generation of the reference signals. An important issue associated with accurate grid voltage monitoring is the presence of an offset in the measured grid voltage. This voltage offset is typically introduced by the measurements and data conversion processes and causes errors for the estimated parameters of the grid voltage. Accordingly, this paper presents an offset rejection method for grid-connected converters based on a Phase-Locked-Loop (PLL) technique. The offset rejection method relies on the Second Order Generalized Integrator (SOGI) having the advantages of a simple implementation independent of the grid frequency and avoidance of filtering delays due to its resonance at the fundamental frequency. Selected experimental results validate the performance and robustness of the proposed offset rejection method.
Original languageEnglish
Title of host publicationConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
Pages1611-1617
Number of pages7
DOIs
Publication statusPublished - 2008
Externally publishedYes
EventIEEE Applied Power Electronics Conference and Exposition (23rd : 2008) - Austin, United States
Duration: 24 Feb 200828 Feb 2008

Conference

ConferenceIEEE Applied Power Electronics Conference and Exposition (23rd : 2008)
CountryUnited States
CityAustin
Period24/02/0828/02/08

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