Frequency Adaptive Digital Filter Implementation of Proportional-Resonant Controller for Inverter Applications

Anirudh Budnar Acharya, Dezso Sera, Lars Norum, Remus Teodorescu

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

1 Citation (Scopus)

Abstract

The Proportional-Resonant control is used in control schemes that directly act on AC variables avoiding synchronous frame transformation. In this paper, the PR controller is realized using an IIR digital filter and implemented using direct form II transposed structure. It has a simpler discrete time implementation, however, the disadvantage of being difficult to make them frequency adaptive, i.e. change the filter's resonant frequency. Simple closed loop expressions are derived for the coefficients in terms of resonant frequency, sampling time and damping factor. Based on this, a frequency adaptive proportional-resonant controller is proposed. It is shown that by modifying a single coefficient in the IIR realization, the controller adapts its resonant frequency to grid frequency fluctuation resulting in a simple and efficient frequency-adaptive proportional-resonant controller.

Original languageEnglish
Title of host publicationProceedings of the 2018 IEEE 19th Workshop on Control and Modeling for Power Electronics (COMPEL)
Number of pages7
PublisherIEEE Press
Publication dateJun 2018
Pages1-7
Article number8459950
ISBN (Print)978-1-5386-5542-9
ISBN (Electronic)978-1-5386-5541-2
DOIs
Publication statusPublished - Jun 2018
Event19th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2018 - Padova, Italy
Duration: 25 Jun 201828 Jun 2018

Conference

Conference19th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2018
CountryItaly
CityPadova
Period25/06/201828/06/2018

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