Catenary Voltage Supply: Locomotive by using Active Line Side Converter

In traction networks, voltage drop in catenary line is a general problem being faced. By injection of capacitive reactive power to the current controlled active line-side converter losses can be reduced in locomotives. Then catenary voltage is compared with the reference value and the error is fed to PI controller. The controller generates a reference value of converter current which will lead to reactive power injection. The catenary parameters are identified by harmonic current injection. The performance of the proposed control strategy is evaluated in MATLAB- Simulink. The proposed method is applied to reduce the voltage drop in catenary line of locomotive and the optioned result are compared with those of the conventional method.