Power quality improvement of AC railway traction using railway static power conditioner a comparative study

Ac rail traction has become an important part of the power scenario. Negative sequence and harmonic current have become the main issues in high speed ac train traction system. A V/V traction transformer has been adopted for power supply to the traction. Railway static power conditioner (RPC) has been developed to mitigate the power quality issues. A comprehensive technique for compensation of negative sequence and harmonic currents has been discussed and compared. RPC is a back to back connected converter with a dc link. The controller also provides a constant dc link voltage and thus helps in the compensation of active and reactive power. Thus RPC improves the power quality issues due to traction in the power grid.