Research of a Novel Shunt Hybrid Active Filter for the Traction System

A novel high capacity hybrid active power filter topology based on injection circuit is proposed to meet the requirements of harmonic elimination and high power reactive power compensation in Traction power supply system.The novel high capacity hybrid active power filter can not only compensate high power reactive power but also eliminate the harmonic current in the power grid.The capacity of its active power filter is decreased and so is its cost.It analyzed its working principle theoretically,discussed the corresponding control strategy.Through Matlab/simulink simulation its harmonic suppression and reactive power compensation performance are tested;the result shows that the program is feasible.