Science and Education Publishing International Transaction of Electrical and Computer Engineers System 2 3 2014 06 06 Evaluation of the Voltage Stability of a Radial Distribution System having V2G Facilities 98 106 EN Uwakwe C. Chukwu Department of Industrial & Electrical Engineering Technology of South Carolina State University, U.S.A. Satish M. Mahajan ITECES2014234 10.12691/iteces-2-3-4 2013 12 26 2014 05 29 2014 06 06 The penetration of V2G into the distribution system is expected to impact the way power systems are being operated. Voltage instability in the distribution system is a growing problem, and is associated with rapid voltage drops due to heavy load demand that may occur during uncoordinated and simultaneous charging of V2G units during peak hours of a typical day. This is a pressing issue since the next generation electric distribution system may exhibit a high level of volatility due to V2G penetration. In this paper, the impact of V2G parking lots on voltage stability of a radial distribution network is investigated. IEEE 13 Node test feeder network was modeled in the RDAP. Load flow results were applied to the voltage stability index. Results show that for a given penetration level, 3-phase and system-wide V2G integration results in an improved voltage stability than a 1-phase V2G integration. Results also indicate that using V2G parking lots to inject reactive power will have an improved impact on the voltage stability of the system than injecting a real power into the system. These results could be useful for real-time applications as well as for power system operators and planners dealing with an increasing influx of V2Gs in the distribution system.