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Energies 2016, 9(9), 666; doi:10.3390/en9090666

A Conservation Voltage Reduction Scheme for a Distribution Systems with Intermittent Distributed Generators

1
Korea Electric Power Research Institute (KEPRI), 105 Munji-Ro, Yuseong-gu, Daejeon 34056, Korea
2
Department of Electrical and Computer Engineering, Seoul National University, 1 Gwanak-ro, Gwank-gu, Seoul 08826, Korea
3
Department of Electrical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Neville R. Watson
Received: 5 July 2016 / Revised: 16 August 2016 / Accepted: 17 August 2016 / Published: 23 August 2016
(This article belongs to the Collection Smart Grid)
View Full-Text   |   Download PDF [4135 KB, uploaded 23 August 2016]   |  

Abstract

In this paper, a conservation voltage reduction (CVR) scheme is proposed for a distribution system with intermittent distributed generators (DGs), such as photovoltaics and wind turbines. The CVR is a scheme designed to reduce energy consumption by lowering the voltages supplied to customers. Therefore, an unexpected under-voltage violation can occur due to the variation of active power output from the intermittent DGs. In order to prevent the under-voltage violation and improve the CVR effect, a new reactive power controller which complies with the IEEE Std. 1547TM, and a parameter determination method for the controller are proposed. In addition, an optimal power flow (OPF) problem to determine references for the resources of CVR is formulated with consideration of the intermittent DGs. The proposed method is validated using a modified IEEE 123-node test feeder. With the proposed method, the voltages of the test system are maintained to be greater than the lower bound, even though the active power outputs of the DGs are varied. Moreover, the CVR effect is improved compared to that used with the conventional reactive power control methods. View Full-Text
Keywords: conservation voltage reduction; distributed generator; distribution system; reactive power control; volt/var control conservation voltage reduction; distributed generator; distribution system; reactive power control; volt/var control
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Hwang, P.-I.; Moon, S.-I.; Ahn, S.-J. A Conservation Voltage Reduction Scheme for a Distribution Systems with Intermittent Distributed Generators. Energies 2016, 9, 666.

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