Comparative investigation of shunt active power filters in 25kv ac electrified systems

摘要

AC electrified railway systems are embedded with power quality issues which includeudharmonic current pollution, feeder voltage perturbation and reactive power demand. This paper investigates comparatively two configurations of the shunt active power filter (SAPF) for improving the power quality in these systems. In addition, novel SAPF control algorithms based on the synchronous frame of reference are proposed. The effectiveness of the proposed SAPF control algorithms are illustrated via Matlab computer simulations and a comparative study on the two proposed configurations of SAPF has been carried out through a case study.