Next Article in Journal
Thermodynamics of Manufacturing Processes—The Workpiece and the Machinery
Previous Article in Journal
Design of a Smart Bartender with Peristaltic Pumps
Article Menu

Export Article

Open AccessArticle

Control of Distributed Generators and Direct Harmonic Voltage Controlled Active Power Filters for Accurate Current Sharing and Power Quality Improvement in Islanded Microgrids

1
School of Automation Engineering, University of Electronic Sciences and Technology of China, Chengdu 611731, China
2
School of Engineering, University of Glasgow, Glasgow G12 8QQ, UK
3
Aviation Industry Corporation of China, Chengdu Aircraft Industry Corporation, Qingyang District, Chengdu 610092, China
4
Department of Electrical Engineering, COMSATS Sahiwal, Sahiwal 57000, Pakistan
5
School of Computer Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
6
School of Electrical Engineering, Southwest Jiaotong Univeristy, Chengdu 610031, China
7
School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China
*
Author to whom correspondence should be addressed.
Inventions 2019, 4(2), 27; https://doi.org/10.3390/inventions4020027
Received: 15 April 2019 / Revised: 30 April 2019 / Accepted: 13 May 2019 / Published: 15 May 2019
  |  
PDF [3855 KB, uploaded 15 May 2019]
  |  

Abstract

Harmonics are regarded as one of the main challenges in a microgrid. This issue may even get worse when different distributed generators (DGs) work together to solve the load sharing problems due to mismatched feeder impedances and diversified DG ratings. Even though load sharing can be achieved, the microgrid suffers from voltage unbalance and total harmonic distortion (THD) issues at the output of DG terminals as well as at the point of common coupling (PCC). Thus, in this paper, the power quality improving method is discussed, with a target of load sharing under the hierarchical control of different DG units and an active power filter (APF) in microgrids. To achieve this objective, we propose integrating a direct harmonic voltage controlled APF with DGs to improve their harmonic compensation performance. This proposed control scheme has many advantages over conventional control using a shunt resistive active power filter (R-APF) with voltage controlled DGs. First, based on the existing THD level of the PCC voltage, the proposed scheme provides improved voltage compensation and reduction in THD in the islanded microgrid. Secondly, equal load sharing can be achieved simultaneously. Thus, the proposed scheme provides better performance and a seamless interface as the proposed study mainly contains both the voltage controlled DGs and the local based voltage detection APF. View Full-Text
Keywords: active power filter; distributed generation; total harmonic distortion; voltage harmonic compensation active power filter; distributed generation; total harmonic distortion; voltage harmonic compensation
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Munir, H.M.; Ghannam, R.; Li, H.; Younas, T.; Golilarz, N.A.; Hassan, M.; Siddique, A. Control of Distributed Generators and Direct Harmonic Voltage Controlled Active Power Filters for Accurate Current Sharing and Power Quality Improvement in Islanded Microgrids. Inventions 2019, 4, 27.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Inventions EISSN 2411-5134 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top