Calibration set-up for energy measuring systems installed in AC railway systems

The aim of this paper is to describe a new reference set-up developed for laboratory and on-board calibrations of the Energy Measuring Systems (EMS) installed in locomotives for AC supplies, which includes voltage and current transducers and power and energy measurements. The generation system is able to generate AC phantom power in distorted regimes with a frequency content from the fundamental frequency (16.7 or 50 Hz) up to 5 kHz (harmonics, inter-harmonics and sub-harmonics) up to 25 kV and up to 500 A. The reference systems shall be able to calibrate commercial EMS designed for 15 kV-16.7 Hz and 25 kV-50 Hz standard AC railway supplies [1] –[3].