Detection of fault and implementation of resistor based protection scheme by controlling the flying capacitor voltage in a three-level DC-DC converter

Abnormal conditions or faults may occur in the circuit due to inherent problem of the devices connected to the circuit or may due to some external factors. Hence there is a chance for the occurrence of fault even in carefully designed circuits. The implementation of protection scheme is always desirable for any power converter. In this paper, the conditions which can create abnormal voltage stresses in the circuit are initially investigated and analyzed, there after a resistor based protection scheme is implemented for each faulty condition. Furthermore, it is possible to protect the system from various faults by a resistor based protection scheme through the monitoring of flying capacitor voltage. Design, simulation development and study of accomplished using MATLAB Simulink tool box.