10 1

Anti-Islanding Detection Method Using Phase-Shifted Feed-Forward Voltage in Grid-Connected Inverter

Title
Anti-Islanding Detection Method Using Phase-Shifted Feed-Forward Voltage in Grid-Connected Inverter
Author
김성민
Keywords
Grid-connected inverter; islanding detection; feed-forward voltage; PCC voltage; frequency of PCC voltage
Issue Date
2019-10
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE ACCESS, v. 7, Page. 147179-147190
Abstract
For safety and maintenance problems, the grid-connected inverters have been required to detect whether the utility voltage source is connected or disconnected to the grid. If the inverter continues to energize local loads while the utility voltage source is disconnected, it is called islanding operation. This paper proposes a new islanding detection method using phase shifted feed-forward voltage. In the grid-connected inverter system, the PCC voltage is simultaneously measured, and those values are used as the feed-forward values in the current controller. In this paper, the phase of feed-forward voltage is modi ed to detect the islanding condition. As the measured PCC frequency changes, the proposed method modifes the phase of feed-forward voltage. Because the phase angle of feed-forward voltage is determined according to the variation of measured frequency of PCC voltage, the proposed method makes positive feedback to the frequency. If the frequency variation exceeds the allowable range, it is judged to be islanding operation. Since the frequency response of the proposed method is fast, the islanding operation could be detected in 90 ms despite high quality-factor (Qf ), 10. Moreover, when the grid is normal condition but grid frequency changes in allowable range, the proposed method does not produce continuous reactive power which reduces the quality of inverter output power. Lastly, proposed method has very small NDZ because there is no limitation on reactive power injection. The performance of the proposed islanding detection method was verifed by a computer simulation and experiment with 600 W single/three phase grid-connected inverters.
URI
https://ieeexplore.ieee.org/document/8862819http://repository.hanyang.ac.kr/handle/20.500.11754/121273
ISSN
2169-3536
DOI
10.1109/ACCESS.2019.2946317
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ELECTRICAL ENGINEERING(전자공학부) > Articles
Files in This Item:
2019.10_김성민_Anti-Islanding Detection Method Using Phase-Shifted Feed-Forward Voltage in Grid-Connected Inverter.pdfDownload
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE