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Well-Being Analysis of Generating Systems Considering Electric Vehicle Charging

With increasing demand for electric vehicle (EV) charging, power grids can take advantage of the distinctive features of EV charging load. In response to outages, the charging load can be interrupted with no penalty until additional generation becomes available, as long as charging requirements can be fulfilled, to improve system health. Moreover, EVs can further provide emergency capacities back to the grid [i.e., vehicle-to-grid (V2G)]. In this paper, the basic well-being analysis framework is extended to include the interruptible load and equivalent rapid start units associated with EV charging during system lead time by developing evaluation methods for the capacities of EVs available for charging interruption and V2G. The daily unit commitment is investigated with multiple well-being criteria. The proposed idea is illustrated by application to the Roy Billinton Test System (RBTS). Results show that activating EVs' responsiveness not only mitigates the probability of lower reliability due to EV penetration but also further improves the system well-being, especially when V2G is enabled.