NDLI: Robust Current Controller based solar-inverter system used for voltage regulation at a substation

Content Provider	IEEE Xplore Digital Library
Author	Chhabra, M. Barnes, F.
Copyright Year	2014
Description	Author affiliation: Electr., Comput., & Energy Eng., Univ. of Colorado at Boulder, Boulder, CO, USA (Chhabra, M.; Barnes, F.)
Abstract	This paper is a continuation of the work conducted in Chhabra, M., Barnes, F., “Robust Current Controller Design using Mu-Synthesis for Grid-Connected Three Phase Inverter” [1]. High penetration of distributed photovoltaic generation on a distribution system can present several challenges and opportunities for utilities. Voltage sags and swells cannot always be compensated for by slowly responding utility equipment, resulting in degradation in power quality. Voltage variations are commonly caused by rapidly varying solar irradiance, and/or variations in the load. In this paper a robust current controller based solar-inverter system is used for voltage regulation at a substation. Conventional inverter current controllers based on proportional-integral (PI) control may not always offer the superior tracking performance, and harmonic rejection ability of robust controllers. We use the repetitive control strategy, in tandem with a mu-synthesis based controller, to attain optimal sinusoidal reference tracking and harmonic rejection. Musynthesis based control is chosen to attain optimal reference tracking in the presence of plant uncertainties. By applying the mu-synthesis principle, a feedback controller that simultaneously achieves robust stability and robust tracking performance is obtained. To test the proposed inverter current controller, the inverter is interconnected to a 500kW solar system model and operated in volt-var control mode. Ten such 500kW solar-inverter systems are paralleled and interconnected to a substation. The substation is modeled with multiple loads, tap changing transformers, and a 70MVar variable capacitor bank. Simulation performance is compared to an H∞ based optimal current controller, and a PI based current controller.
Starting Page	1407
Ending Page	1412
File Size	714694
Page Count	6
File Format	PDF
e-ISBN	9781479943982
DOI	10.1109/PVSC.2014.6925181
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-06-08
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Voltage control Reactive power Capacitors Inverters Substations Phase transformers Power transformers volt-var robust control optimal control current regulator mu-synthesis H∞ control harmonic rejection reference tracking solar inverter voltage regulation substation
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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