Fault Diagnosis in Medium Voltage Drive Based on Combination of Wavelet transform and Support Vector Machine

Keywords: Insulated gate bipolar transistors, multilevel systems, Support vector machines, Wavelet transforms Copyright © 2016 Universitas Ahmad Dahlan. There are some methods such as expert system, neural networks, current measuring method and polarity detection method to diagnose IGBT open-circuit fault. Artificial neural net technique is used to identify fault state in the neural network method. In [12], the author combined the wavelet analysis and the support vector to diagnose IGBT open-circuit fault. Multi-SVM is used in this paper to diagnose IGBT open-circuit fault. 2.Problem Formulation 2.1.Fault Analysis of Cascade Multilevel Inverter Circuit MVD is mainly composed of phase-shifting transformer and power modules. The connection port R, S and T which will be connected to the secondary winding of phase-shifting transformer are three phase inputs of power module, and the port U and V are outputs. [...]three phase high voltage output are formed in this way. Data-based inverter IGBT open-circuit fault diagnosis in vector control induction motor drives. A Low-voltage Ride through Method with Transformer Flux Compensation Capability of Renewable Power Grid-side Converters. Fault diagnosis system of VFD based on Wavelet Transform and Neural network. Fault diagnosis on a PWM rectifier AC drive system with fault tolerance using the average current Park's vector approach.