NDLI: A modified control strategy for centralized PV - grid systems for assisting dynamic stability to overcome penetration issues

Content Provider	IEEE Xplore Digital Library
Author	Wandhare, R.G. Agarwal, V.
Copyright Year	2012
Description	Author affiliation: Indian Institute of Technology -Bombay, Mumbai, Maharashtra, 400 076, INDIA (Wandhare, R.G.; Agarwal, V.)
Abstract	Interfacing inertia-less large PV sources to the power system raises complex PV penetration issues such as bus voltage fluctuation, active power variation, reactive power flow and sharing, system instability etc. This paper proposes a new control technique for large capacity centralized PV fed grid connected systems which enhances the system stability by damping out the low frequency power swing. The presented work addresses a major PV penetration issue - that of system instability, by proposing a modified control scheme of the power conditioning unit of a PV source. The proposed scheme improves the small signal stability and dynamic security of the system without introducing any additional devices (e.g. PSS). The developed analytical approach for the control law is based on the structure preserving energy function (SPEF) model. In order to evaluate the proposed controller and validate the control law, a conventional model of the two machine system with double line transmission is interfaced with a large PV source of rating comparable to that of conventional generator capacities. A notable feature of this work is that the derived control law uses only the locally measurable signals and is independent of the location of the PV source in the system. Further, it does not affect the MPPT control of the PV system in any manner.
Starting Page	001540
Ending Page	001544
File Size	1072660
Page Count	5
File Format	PDF
ISBN	9781467300643
ISSN	01608371
e-ISBN	9781467300667
DOI	10.1109/PVSC.2012.6317888
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Power system stability Voltage control Reactive power Stability analysis Oscillators Power system dynamics Solar power generation Reactive power control Distributed power generation DC-AC power converters
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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