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Voltage/load Control Strategy for Smart Distribution Grids with a High Penetration of Renewable Energy Sources

NourEldeen Elsayad, Khaled Bashir Shaban, Ahmad Massoud, Ramadan ElShatshat

2016/5/20

Abstract

The exponential increase of renewable energy sources (RESs) penetration in the power grid introduces the of voltage instability when RESs are integrated into medium and low voltage networks. This paper proposes a state-machine based voltage/load control strategy for different operating scenarios in a system comprised of a large RES power plant connected to a medium voltage bus at 11kV, and small RES systems scattered across low voltage networks at 415V. Three modes of operation are summarized, in which the appropriate action is taken according to the availability of RES power generation in the network and the loading condition of this network. Efficient power sharing is achieved via the utilization of a communication network deployed between the RES systems. The communication protocol of the network is represented in four messages adopted by the RES systems integrated into the grid. The effectiveness of the proposed voltage/load control strategy to surpass overvoltage cases caused by over-generation of RES power is illustrated through simulations. The proposed strategy can be adopted by either agreement between a utility and RES owners, or by making it the basis for a standard for RES installation.

Published in: Renewable Energy & Power Quality Journal (RE&PQJ, Nº. 14)
Pages:441-446 Date of Publication: 2016/5/20
ISSN: 2172-038X Date of Current Version:2016/05/04
REF:358-16 Issue Date: May 2016
DOI:10.24084/repqj14.358 Publisher: EA4EPQ

Authors and affiliations

NourEldeen Elsayad(1), Khaled Bashir Shaban,(1), Ahmad Massoud(1), Ramadan ElShatshat(2)
1. Computer Science and Engineering Department, College of Engineering. Qatar University
2. Department of Electrical and Computer Engineering. University of Waterloo. Canada

Key words

Smart grid, distribution power networks, renewable energy sources, communication networks, load power sharing, voltage regulation.

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