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

被引：8

作者：

Lee, Jae Suk ^{[1
]}

Hwang, Seon-Hwan ^{[2
]}

机构：

[1] Chonbuk Natl Univ, Dept Elect Engn, Jeonju 54896, Jeollabuk Do, South Korea

[2] Kyungnam Univ, Dept Elect Engn, Chang Won 51767, South Korea

来源：

ENERGIES | 2018年 / 11卷 / 09期

基金：

新加坡国家研究基金会;

关键词：

single-phase grid-tied inverter; direct current (DC) offset error; proportional-resonant (PR) current control; DC component; secondary harmonic component; CONNECTED INVERTERS; STRATEGY; CONVERTERS; INJECTION; SYSTEMS;

D O I：

10.3390/en11092308

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

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.

引用

页数：13

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