A unified model of power sources for the simulation of electrical energy systems

Abstract

Models of power sources are essential elements in the simulation of systems that generate, store and manage energy. In spite of the huge difference in power scale, they perform a common function: converting a primary environmental quantity into power. This paper proposes a unified model of a power source that is applicable to any power scale, and that can be derived solely from data contained in the specification or the datasheet of a device. The key feature of our model is the normalization of the energy generation characteristic of the power source by means of a reduction to a function expressing extracted power vs. the "scavenged" quantity. The proposed model proved to apply to two kinds of power sources, i.e., a wind turbine and a photovoltaic panel, and to provide a good level of accuracy and simulation performance w.r.t. widely adopted models.