Results 221 to 230 of about 29,217 (264)

Internal fault simulation in synchronous machines

2000 Canadian Conference on Electrical and Computer Engineering. Conference Proceedings. Navigating to a New Era (Cat. No.00TH8492), 2002
This paper describes a synchronous machine model that can be used to simulate internal fault waveforms for power system protection studies. The need to develop the machine model in the direct phase domain is explained and a method to calculate the inductances involving the faulty windings is outlined using a four pole lap wound machine.
D.De S. Muthumuni, E. Dirks
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Fault Lines of International Legitimacy

2009
Fault Lines of International Legitimacy deals with the following questions: What are the features and functions of legitimacy in the international realm? How does international legitimacy, as exemplified in particular by multilateral norms, organizations, and policies, change over time?
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The "arc killer": the internal fault suppressor

IET Conference Publications, 2009
This paper describes the Arc Killer device. It can detect and suppress an internal arc fault on a secondary distribution switchgear in less than 125 ms. The consequences and the damages due to an internal arc fault are then reduced to the minimum.
D. Piccoz, C. Preve, F. Buffa, P. Grosjean   +3 more
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Studies on the internal fault simulations of powerformer

2016 China International Conference on Electricity Distribution (CICED), 2016
This paper discusses the set-up of a mathematical model of powerformer, a new type of synchronous machine, for analyzing internal phase and ground faults in stator windings. The method employs a direct phase representation considering the cable capacitance.
Qing Tian, Taoxi Zhu
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Internal Faults in Modular Multilevel Converter

2018 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), 2018
The Modular Multilevel Converter (MMC) has modular and redundant structure, which makes it more reliable during certain fault conditions. Hence MMC technology has received considerable attention among various topologies for interconnecting High Voltage Direct Current (HVDC) grid.
Shilpi Kedia, Rohit S. Thute, Himanshu J. Bahirat, Anshuman Shukla   +3 more
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Simulation of internal faults in synchronous generators

IEEE Transactions on Energy Conversion, 1999
An internal fault in the armature winding of a synchronous generator occurs due to the breakdown of the winding insulation. In this paper, a method for simulating internal faults in synchronous generators, using direct phase quantities, is described. Simulation results showing the fault currents, during a single phase to ground fault and a two phase to
A.I. Megahed, O.P. Malik
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A simple method to detect internal and external short-circuit faults, classify and locate different internal faults in transformers

Electrical Engineering, 2020
In new power systems, transformer monitoring and on-time detection of internal faults in power transformers are of great importance because if these faults are not identified on-time, the lifetime of the transformer might be reduced, the transformer might be completely disconnected, and network reliability might decrease. In this paper, a new method is
Hossein Ahmadi, Behrooz Vahidi, Amin Foroughi Nematollahi   +2 more
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A Fuzzy Neural Network Based Fault Detection Scheme for Synchronous Generator with Internal Fault

2009 Sixth International Conference on Fuzzy Systems and Knowledge Discovery, 2009
A fuzzy neural network (FNN) based inter-turn short circuit fault detection scheme for generator is proposed. The second harmonic magnitude of field current and the negative sequence components of voltages and currents are used as inputs for the FNN fault detector.
Hongwei Fang, Changliang Xia
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Contributory Fault in International Investment Arbitration

Journal of International Arbitration
As a general rule, if a state commits a wrongful act, it is under an obligation to make full reparation for the injury caused. Yet, arbitral tribunals have used the doctrine of contributory fault to reduce the amount of damages awarded to the investor for the state’s breach of an investment treaty. This article analyses fifteen arbitration
Dmytro Galagan, Markus Burgstaller
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Internal fault currents in A-C motors

Electrical Engineering, 1956
VARIOUS TYPES OF PROTECTIVE DEVICES, such as relays, fuses, and circuit breakers, are used to provide a-c-motor fault protection. The effectiveness of these devices in protecting motors is, in most cases, dependent on the magnitude of the fault current. A general answer to this question of the magnitude of fault currents under different conditions of a-
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