At present, most of the winding fault detections transformers use offline methods, which require entire line to be powered off or after transformer has been shut down due a serious fault, and they cannot detect running status windings in real time online. Since will impacted by VFTO during operation, is used as excitation, basic principle frequency response method propose an online detection de...

A general method for fault detection and isolation is proposed and applied to inverter faults in drives of electric vehicles. This method is based on a change-detection algorithm, which allows multiple fault indices to be combined for retrieving the most likely state of the drive. The drive topology under study is a six-leg inverter associated with a three-phase open-end winding machine. Due to...

Most of the HVDC power converters with thyristor valves are assembled in a converter Bridge of Six pulse configuration. Converter transformers with one DC side winding as an ungrounded star connection and the other a delta configuration. Comparative studies of the two systems of HVDC CIGRE model without STATCOM and with STATCOM were performed. In these case, the consideration was the converter ...

Frequency response analysis (FRA) is a method of monitoring power transformer’s mechanical integrity. However, identifying the type fault and its severity by comparing measured responses still challenging mostly relies on personnel expertise. This paper taking one step forward to standardize FRA interpretation process proposing guidelines based various international standards case studies. In t...

The occurrence of mechanical failure caused great loss of life and property, the purpose of this paper is to use SVM method to determine the type of mechanical failure, so as to simplify the maintenance process of large equipment. In this paper, we use the nonlinear method of SVM high dimensional space to detect and diagnose the fault. A function is established by using the relationship between...

The sidebands around stator currents harmonics as a potential tool for supporting the diagnosis of rotor faults in induction motors are analyzed in this paper. The presence of broken bars introduces high frequency components in the machine currents spectrum in addition to the characteristic sidebands around the fundamental component. These additional components are due to the interaction betwee...

To address the problem of winding turn-to-turn breakdown faults in 35 kV dry-type transformers wind farms under overvoltage conditions, this paper establishes a simulation model based on structural dimensions and material parameters transformer windings. The distribution were calculated using finite element method. transient processes inside high-voltage coil by constructing multi-conductor tra...

This paper presents a detailed literature review on switched reluctance motor (SRM) and drive systems in electric vehicle (EV) powertrains. SRMs have received increasing attention for EV applications owing to their reliable structure, fault tolerance ability magnet free design. The main drawbacks of the SRM are torque ripple, low power density, factor small extended speed range. Recent research...

The difficulty of open-switch fault detection in an open-winding inverter is that the at diagonally opposite position within H-bridge power cell has same characteristics. To solve this problem, paper proposes method based on (OW) five-phase fault-tolerant permanent-magnet (FPFTPM) motor drives. includes three steps: first, drives detected by monitoring component third harmonic residual stationa...