Multimachine electromechanical response: comparison between DigSilent and Matlab-based linearised behaviour

The aim of this paper is showing the potential and the use limits of a matrix-based linearized electromechanical dynamics by means of the extensive comparison with a commercial power system software. Since the schematic grid in the matrix-based linearized electromechanical dynamics is a simple graph with only branches, nodes and connected electric elements, and the commercial software grid maintains the complexity of a real electric network, an interface procedure is implemented in order to maintain the correct topological structure. Results from the real dynamics and the linearized one are compared each other and are discussed. The implemented algorithm seems to be an effective tool for both research and power education.