Implementation of different methods for PTDF matrix calculation in flow-based coordinated auction

Flow-based coordinated auctioning (CA) is cross-border transmission capacity allocation mechanism. The South-East European (SEE) Transmission system operators (TSOs) launched the investigation of this method, based on better representation of physical behavior of interconnected electric systems than those widely used on most of the European borders. CA uses flow-factors (PTDF - Power Transfer Distribution Factors) to convert the commercial exchanges into their physical influence on the cross-border flows, and Border Capacities (BC) as physical limitations for those flows. The goal of this paper is to conduct a numerical comparison between different methods used for PTDFs calculation.