Post fault operation of a dual matrix converter fed open-end load

Abstract

This paper investigates the fault tolerant control strategies for a three to five-phase dual matrix converter fed open-end load system. There are two three to five phase matrix converter at both the ends of the load. In healthy condition both the matrix converters are sharing the load according to their modulation index. After the occurrence of an open-circuit fault in one of the matrix converter, it is disconnected and the other remaining converter shares the load according to its capacity (maximum rating is half of the dual converter). In the proposed scheme both the converters are sharing the load equally under normal operating conditions. After the clearance of fault, again both the matrix converters start working normally and sharing the load equally. In this paper it is shown that in a dual matrix converter supply system, they can work in healthy condition, post-fault condition and after clearance of the fault without break in continuity of the supply. Space vector pulse width modulation technique is used for control of the dual matrix converters under normal and post-fault conditions. Here open-end five-phase R-L load is taken for validation of the technique. Simulated results are verified experimentally.