Jul 2026· International journal of circuit theory and applications· 0 citations
Abstract
Inductive power transfer (IPT) technology has become a research focus due to its convenience, flexibility, and environmental adaptability. However, the high failure rate of power electronic devices in IPT systems poses a significant challenge, with the precise diagnosis and localization of rectifier faults being a critical issue that requires immediate attention. This paper proposes a fault diagnosis method based on harmonic analysis for rectifier short‐circuit faults in IPT systems. Initially, simulations were conducted to analyze the electrical characteristics of faults at different locations and the potential secondary faults they might cause. Subsequently, a mathematical model of the system was established, and the time‐domain expressions of fault characteristics were derived, with their analytical expressions in the frequency domain obtained through Fourier transformation. Based on this, by analyzing the mapping relationship between different fault types and frequency‐domain characteristics, a diagnostic scheme capable of fault type identification and localization was constructed. Finally, an experimental platform was set up to verify the variation patterns of characteristics under single‐diode and dual‐diode short‐circuit faults.
As a critical component of power systems, the operational status of power transformers directly affects the safety and reliability of the power grid. Addressing the challenge that traditional methods struggle to achieve online monitoring of winding deformation faults, this paper proposes a novel method for online detec...
Lai-Hong Wei· European Conference on Elect...· 0 citations
Existing EMTR methods typically adopt passive location schemes that rely on transient signals generated by faults. When faults occur at a low inception angle, the resulting traveling-wave signals are typically weak and suffer from poor detectability. Active pulse injection provides controllable excitation and improves...
In this paper, a fault diagnosis method based on temperature rise detection is proposed for power converters in switched reluctance motor drive systems used in electrical transportation equipment. First, the total power losses of all power devices are calculated and recorded under different operating conditions in both...
Xiang-Su Wang, Zhijie Zhang, Qing Wang et al.· Machines· 0 citations
DC fault is one of the critical issues in modular multilevel converter (MMC)-based high voltage DC (HVDC) systems. Existing DC fault detection schemes suffer from several limitations, including poor sensitivity to high-resistance faults, low noise immunity, high sampling-frequency requirements, and significant computat...
Sattar Bazyar, Hossein Iman-Eini, Alireza Fereidunian et al.· IEEE Journal of Emerging and...· 0 citations
Protection of electrical power systems is the major issue in power industry and for the protection of these electric power systems, current distance relays are widely applied due to their inherent simplicity, excellent sensitivity on internal faults and high stability on external faults. This work represented the probl...
A. Rajak, Preeti Rajput, M. Choubey· International journal of res...· 0 citations
Strong noise in high-voltage transformer environments can easily overwhelm weak fault signals during the switching control of simulated fault resistance networks. This interference hinders the accurate identification of fault types and levels, ultimately compromising the stability and accuracy of the switching process....
Wei-Ping Wu, Tie-Gang Yang· Journal of Physics, Conferen...· 0 citations
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