Output Protection Strategies for Matrix Converters in Distributed Generation Applications

An overview of the matrix converter and standard protection strategies is presented for an understanding of the matrix converter and its currently implemented protection strategies. New protection methods are then proposed for downstream faults to reduce their severity and to buy enough time to fully protect both the matrix converter and sensitive loads. The goal of implementing new output protection strategies is to be able to utilize the matrix converter in future distributed generation applications. The proposed methods are based on the addition of a standard protective relay and circuit breaker combination at the output of the matrix converter along with generator neutral grounding resistance and a zero voltage output command. Simulation and hardware testing results are then presented in order to verify that the new methods will protect the matrix converter and downstream loads while adding additional selectivity and diagnostic capabilities