The influence of failures of a multiphase p.m. synchronous generator and a static voltage converter system on the generator electromagnetic torque

The electrical energy produced by a p.m. synchronous generator can be converted to the desired value by an appropriate power electronic voltage converter. The influence of the converter on the power system composed of the 9-phase p.m. synchronous generator and the driving gas turbine is the subject of this paper. The high speed generator is loaded directly with a multiphase rectifier supplying the output inverter. The main analysed problem is connected with fault cases of the converter which may cause a significant increase in alternating component of the electromagnetic torque. This torque loads the gas turbine. The short circuit and breaking in the generator output are the main analysed failures. This paper additionally elaborates on the increase in the gas turbine velocity and the short circuit in the converter output or short circuit on any diode of the converter.