A unified control structure for grid connected and islanded mode of operation of voltage source converter based distributed generation units under unbalanced and non-linear conditions
File(s)
Accepted version
Author(s)
Merritt, Noel Richard
Chakraborty, Chandan
Bajpai, Prabodh
Pal, Bikash C
Type
Journal Article
Abstract
This manuscript develops a unified control structure for Distributed Generation (DG) units based on Voltage Source Converters considering unbalanced and non-linear operating conditions. This control structure works for both the Islanded and the Grid-connected modes of operation of the Micro-Grid (MG). The objective of this control scheme is to regulate the line currents of the DG unit in such a manner that the voltage at the Point of Common Coupling (PCC) remains balanced despite the line currents of the DG unit being unbalanced and distorted. Multiple adaptive P-R controllers have been proposed for the current control loop of the Voltage Source Converter (VSC). These controllers have been implemented with resettable integrators so as to limit the DC components in the post fault current of the VSC. The Battery Energy Storage System (BESS) is interfaced to the DC link of the VSC through bi-directional dc-dc converters. An improved control structure for the bi-directional dc-dc converter has been developed. The effectiveness of these control structures have been presented and tested in PSCAD/EMTDC in an IEEE 34 node distribution system model being fed by two identical DG units.
Date Issued
2020-08-01
Date Acceptance
2019-11-02
Citation
IEEE Transactions on Power Delivery, 2020, 35 (4), pp.1758-1768
ISSN
0885-8977
Publisher
Institute of Electrical and Electronics Engineers
Start Page
1758
End Page
1768
Journal / Book Title
IEEE Transactions on Power Delivery
Volume
35
Issue
4
Copyright Statement
© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000553059900015&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Technology
Engineering, Electrical & Electronic
Engineering
Voltage control
Current control
DC-DC power converters
Bidirectional control
Couplings
Distributed power generation
Fault currents
Voltage Source Converter (VSC)
Bi-directional dc-dc converter
Micro-Grid (MG)
Generalized Integrator (GI)
CONTROL STRATEGY
BATTERY
DESIGN
Publication Status
Published
Date Publish Online
2019-11-11