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Energies 2013, 6(12), 6322-6334; doi:10.3390/en6126322

Evaluation of the Effects of Nationwide Conservation Voltage Reduction on Peak-Load Shaving Using SOMAS Data

1
Department of Electrical Engineering, Myongji University, Yongin 449-728, Korea
2
Department of System Operation & Control, Korea Power Exchange, Seoul 135-791, Korea
3
Department of Electrical Engineering, Chonnam National University, Gwangju 500-757, Korea
*
Author to whom correspondence should be addressed.
Received: 3 September 2013 / Revised: 13 November 2013 / Accepted: 25 November 2013 / Published: 3 December 2013
(This article belongs to the Special Issue Smart Grids: The Electrical Power Network and Communication System)
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Abstract

In this paper we propose a new method to evaluate the effects of nationwide conservation voltage reduction (CVR) on peak-load shaving, using substation operating results management system (SOMAS) data. Its evaluation is based on a national CVR factor, which is defined as the weighted average of CVR factors associated with all transformer banks and weighting coefficients are determined by the reconstructed loads corresponding to each transformer bank. To make use of the data resulting from nationwide CVR without installing additional measuring devices, we adopt a linearized static-load model with a linearizing parameter. SOMAS data are used to evaluate the effects of nationwide CVR on peak-load shaving in the Korean power system. Evaluation results show that the national CVR factor of the Korean power system has small values in the summer season and large values in the winter season. This means that the effect of nationwide CVR on peak-load shaving in the Korean power system presents stronger benefits during winter months.
Keywords: linearized static-load model; linearizing parameter; nationwide conservation voltage reduction (CVR); national CVR factor; peak-load shaving; substation operating results management system (SOMAS) linearized static-load model; linearizing parameter; nationwide conservation voltage reduction (CVR); national CVR factor; peak-load shaving; substation operating results management system (SOMAS)
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Nam, S.-R.; Kang, S.-H.; Lee, J.-H.; Ahn, S.-J.; Choi, J.-H. Evaluation of the Effects of Nationwide Conservation Voltage Reduction on Peak-Load Shaving Using SOMAS Data. Energies 2013, 6, 6322-6334.

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