DC Offset Error Compensation Algorithm for PR Current Control of a Single-Phase Grid-Tied Inverter

Jae Suk Lee and Seon-Hwan Hwang
Additional contact information
Jae Suk Lee: Department of Electrical Engineering, Chonbuk National University, Jeollabuk-do 54896, Korea
Seon-Hwan Hwang: Department of Electrical Engineering, Kyungnam University, Changwon 51767, Korea

Energies, 2018, vol. 11, issue 9, 1-13

Abstract: In a single-phase grid-tied inverter, the direct current (DC) offset error included in the measured grid side phase current has various causes, such as a non-ideal current sensor, unbalanced power supply of an operational amplifier, and nonlinear features of analog components in interface circuits, etc. If the DC offset error is included in the measured current, it causes the secondary harmonic of fundamental frequency and the DC component in grid phase current which result in degradation of inverter performance. In this paper, a theoretical detection method of the secondary harmonic of the fundamental frequency and a DC component in grid phase current for a proportional-resonant (PR) current control system is introduced. Based on the detection method, an algorithm for compensating DC offset error is also presented for single-phase grid-tied inverters. Simulation results and experimental verification of the DC offset error compensation algorithm are shown in this paper.

Keywords: single-phase grid-tied inverter; direct current (DC) offset error; proportional-resonant (PR) current control; DC component; secondary harmonic component (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.mdpi.com/1996-1073/11/9/2308/pdf (application/pdf)
https://www.mdpi.com/1996-1073/11/9/2308/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:11:y:2018:i:9:p:2308-:d:167277

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().