Abstract

The number of Plug-in Electric Vehicles (PEVs) is increasing worldwide, as well as are the rates with which vehicles can be charged. This poses the question regarding how many PEVs may ultimately be connected simultaneously for charging, and how quickly the load of PEVs can increase, before the existing power grids show stability issues. In particular, we denote the first as a static limit, and has mainly an impact in terms of node voltages, while the second is a dynamic limit, which mainly affects the frequency of the system. In this paper, we shall use a transient stability model of power systems to assess both limits for a realistic power transmission system, and conclude that the static limit is actually the most critical one.

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