Simulation of electrical loads for the steady-state regime calculation of electric grids with arc extinguish reactor

Abstract

The problem of modeling electrical loads in the calculation of modes of electric networks with controllable arc extinguish reactor with asymmetry modes is considered. The model is based on the simplifying assumption of constant power load permitting the use of a minimum set of input data. The equations are obtained using methods of phase coordinates and symmetrical components. The model is a formula of nonlinear transformation of phase voltages in phase load currents with the double exception of zero sequence. It is shown that even with a significant bias of neutral conductor load currents using this model are almost symmetrical. The proposed model of the load can be used to calculate the normal net mode with arc extinguish reactor, as well as to calculate the single phase-to-earth fault modes.