A version of this paper was presented at 2016 CIGRE International Colloquium on the Evolution of Power System Planning to Support Connection of Generation, Distributed Resources and Alternative Technologies, sponsored by the CIGRE US National Committee (USNC) and Electric Power Research Institute (EPRI) held November 2-3, 2016 in Philadelphia, Pennsylvania. Strategic Placement of Low Voltage Connected Voltage Regulation Devices P. CHIRAPONGSANANURAK, N. GANTA, H. V. PADULLAPARTI, S. SANTOSO The University of Texas at Austin USA J. TAYLOR Electric Power Research Institute USA M. SIMMS, A. VUKOJEVIC Duke Energy USA SUMMARY A methodology for locating low-voltage connected voltage regulation technologies to mitigate undervoltage conditions throughout a given distribution circuit is proposed in this paper. In particular, the placement of a unified power flow control (UPFC) and multiple static voltage compensators (SVC) is assessed. Siting is driven by the magnitude and duration of the undervoltage conditions estimated for each low voltage service using a quasi-static time-series (QSTS) model of the distribution feeder. An iterative evaluation process, siting each device one at a time, is employed to effectively capture the influence on neighboring services as well as to enforce additional siting constraints. The placement methodology is applied to a representative 12.47-kV distribution feeder where one UPFC and 15 SVC devices are available for deployment. Prior to deployment, QSTS simulation of the circuit estimated that during the highest summer peak load day, as many as 12.2% of service points experienced undervoltage violation of below 0.95 pu between 1 and 8 pm for a total of 377 minutes. These undervoltage conditions are clustered in three relatively enclosed neighborhood. Using a limited number of strategically located edge-connected voltage regulation devices, QSTS simulation shows that the placement approach was able to completely eliminate undervoltage conditions. Furthermore, it is interesting to point out that about 9.5% of the service points experience voltages between 0.95 and 0.96 pu while the remaining points (90.5%) have voltages of higher than 0.96 pu. KEYWORDS Distribution circuit, in-line power regulator, static voltage compensator, voltage regulation, undervoltage area 21, rue d’Artois, F-75008 PARIS 2016 CIGRE International Colloquium http : //www.cigre.org