École Nationale Supérieure de
Techniques Avancées

Abstract

Initializing electric network dynamic simulation has always been a complicated problem and often resulted in the user manually correcting the simulation. However, with the advent of more autonomous and automatic control system such as the iTesla platform, it is important to be able to initiate a dynamic simulation in a stable state directly. In this context, this paper presents a method to compute the stable simulation domain of a generator, according to the dynamic simulator Eurostag. Under the hypothesis that the stable simulation domain is convex, the domain is computed using tangential planes to its border by exploring the domain in chosen directions and is refined in its corners after each step of exploration. The two resulting domains are defined by the tangential planes and defined by the convex hull of the stable border points. The two computed domains are then compared to first the convex hull of random stable points and second to the reference diagram given by the constructor or operator of the machine. This comparison showed that the computed domains provided satisfying results fitting both the random domain and the reference diagram in most cases. Unsatisfying results managed to highlight problems in the generators modeling. Keywords: capability chart, power system modeling, power system simulation, power system stability