Method for Detecting an Open Switch Fault in a Grid Connected Npc Inverter System

Abstract

In this paper we are implementing a three level converter which is utilized as the power converter of wind turbine due to its advantage like high efficiency, low collector emitter voltage and low current total harmonic distortion. According to the interior permanent magnet synchronous generator it has the better size and efficiency. Therefore according to the wind turbine system which consist of the three level converter and IPMSG and fault tolerant control for the open circuit fault of switches which is used to improve the reliability. Therefore according to the paper which is perform on the open circuit fault of the outer switches in the three level rectifiers which is connected to the IPMSG .according to the effect ofSx1 andSx4 open-circuit faults have been analysis which is based upon the proposed in the tolerant control. Therefore according to the proposed tolerant control which is maintain in normal operation such as sinusoidal control which is under the open fault of the outer switches by adding a compensation value to the reference voltages. By using the simulation result we can analysis the performance of the proposed system.