Product Showcase: Benefits of a 2×25 kV++ system

The 2×25 kV++ system is an upgrade of the 2×25 kV catenary arrangement with a substantially decreased catenary impedance…

Jean Paul Perret, Thibaut Craen and Marc Friaud, Rail and Transit Consultants and Engineers from Egis explain that this innovative solution for AC powered railway lines leads to increased power quality resulting in the optimisation of power supply architecture.

A RAILWAY electrical engineer has to cope with the power demand, the voltage drop along a route, and the possible locations of high voltage grid (HV) infeed points to power traction substations. In order to propose new competitive traction architecture (for AC traction lines), Egis has launched a research programme to add a new technical solution to an engineer’s tool box. This research programme deals with the electromagnetic interaction between catenary wires and is based on the Egis multiconductor traction simulation software (SIMALIM). This has led to a new configuration of the AC catenary wires, named 2×25 kV++.

The very first presentation took place at the 2015 Modern Electrified Transport Conference in Trogir, Croatia. Since then, Egis has engaged with the UK’s University of Birmingham Centre for Railway Research and Education (BCRRE) to confirm the results of 2×25 kV++. Thanks to this collaboration, we now have new and a much deeper insight.