Impact of Voltage Reduction on Energy and Demand: Phase II

This paper presents the results of an experimental study involving the impact of voltage reduction on energy use and demand level on selected distribution feeders of differing load composition on the American Electric Power System (AEP). An eighteen month study was conducted on fifteen distribution circuits, during which voltage was reduced by a fixed five percent for the first twelve months, and a variable voltage reduction was implemented for the remainder of the study period. In each case voltage reduction was in effect for a twenty four hour period on alternating weekdays. Analysis of data obtained through field measurements indicates some reduction in energy usage during the reduction period as well as a reduction of demand.