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Energies 2017, 10(12), 2148; doi:10.3390/en10122148

Estimation of Conservation Voltage Reduction Factors Using Measurement Data of KEPCO System

1
Department of Electrical Engineering, Chonnam National University, Gwangju 61186, Korea
2
Energy System Group Energy New Business Laboratory, Korea Electric Power Research Institute, Daejeon 34056, Korea
*
Author to whom correspondence should be addressed.
Received: 21 November 2017 / Revised: 10 December 2017 / Accepted: 11 December 2017 / Published: 15 December 2017
(This article belongs to the Section Electrical Power and Energy System)
View Full-Text   |   Download PDF [3442 KB, uploaded 15 December 2017]   |  

Abstract

This paper describes a method to estimate conservation voltage reduction (CVR) factors using data measured in power distribution systems. A direct method is proposed to estimate CVR factors using only data measured at the moment of the transformer tap change. The mean absolute deviation (MAD) direct method is proposed to consider direct methods and load variations. The proposed methods do not necessitate intentional tap changes for testing purposes. Instead, the voltage and load changes that occur when the tap changes, for voltage regulation purposes, are measured and utilized in the CVR factor calculation. The proposed methods were tested using data obtained from the Korea Electric Power Corporation (KEPCO) system, and the results revealed that CVR factors for both active power and reactive power could be estimated using data measured in power distribution systems. Results of the CVR factor estimation for the active power revealed that the highest CVR factors occurred in winter, during which a large quantity of heating loads exist. In addition, the estimated CVR factors for the reactive power were higher than the estimated CVR factors for the active power because reactive power is more sensitive to voltage changes. View Full-Text
Keywords: conservation voltage reduction; CVR factor; distribution system; estimation; load; measurement conservation voltage reduction; CVR factor; distribution system; estimation; load; measurement
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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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MDPI and ACS Style

Shim, K.-S.; Go, S.-I.; Yun, S.-Y.; Choi, J.-H.; Nam-Koong, W.; Shin, C.-H.; Ahn, S.-J. Estimation of Conservation Voltage Reduction Factors Using Measurement Data of KEPCO System. Energies 2017, 10, 2148.

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