Abstract
In order to develop an estimate of the benefits of Conservation Voltage Reduction (CVR) in the distribution system, the composite characteristics of system loads have been extracted from measurements of electrical quantities at the main substation. Real and reactive power measurements at the secondary bus of the substation are used as inputs to the parameter identification procedure based on the least square optimization approach for finding aggregated ZIP load model parameters. This knowledge is further used in finding a quantitative estimation approach for predicting the effectiveness of substation transformer tap changes in reducing total power demand during different distribution system load conditions. The proposed algorithm is implemented on the IEEE 34 bus test system and the results are demonstrated. It is shown that the method can predict the effectiveness of CVR with acceptable accuracy.