Reducing passive filter sizes with tuned traps for distribution level power electronics

This paper proposes a filter topology intended for use with medium voltage grid-interfaced power electronics as an alternative to the widely-utilized LCL filter topology. The proposed topology utilizes multiple shunt RLC trap filters with parameters optimized to minimize the overall size of the filter while meeting performance requirements for connection to the distribution grid. Results indicate a potential for reduction of twenty-five to thirty percent in total filter volume for the scenario studied. In addition, total power losses taking place within the filter are slightly reduced.