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Exploiting PV Inverters to Support Local Voltage—A Small-Signal Model / Meghdad Fazeli; Janaka B. Ekanayake; Paul M. Holland; Petar Igic

IEEE Transactions on Energy Conversion, Volume: 29, Issue: 2, Pages: 453 - 462

Swansea University Author: Fazeli, Meghdad

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Abstract

As penetration of distributed generation increases, the electrical distribution networks may encounter several challenges mainly related to voltage control. The situation may deteriorate in case of a weak grid connected to an intermittent source such as photovoltaic (PV) generation. Fast varying sol...

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Published in: IEEE Transactions on Energy Conversion
ISSN: 0885-8969 1558-0059
Published: 2014
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa17304
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Abstract: As penetration of distributed generation increases, the electrical distribution networks may encounter several challenges mainly related to voltage control. The situation may deteriorate in case of a weak grid connected to an intermittent source such as photovoltaic (PV) generation. Fast varying solar irradiance can cause unacceptable voltage variations that may not be easily compensated by slow-responding utility equipment. The PV inverter can be used to control the grid voltage by injecting/absorbing reactive power. A small-signal model is derived in order to study the stability of a PV inverter exchanging reactive power with the grid. This paper also proposes a method that utilizes the available capacity of the PV inverter to support the grid voltage without violating the rating of the inverter and the maximum voltage that the inverter's switching device can withstand. The method proposed in this paper is validated using PSCAD/EMTDC simulations.
College: College of Engineering
Issue: 2
Start Page: 453
End Page: 462