Results 41 to 50 of about 10,045 (225)
Investigation on tunnel stability considering pipe‐roof support with transparent soil technology
Deep Underground Science and Engineering, EarlyView.This study integrates transparent soil technology, 3D reconstruction and numerical simulation to captures the full‐field deformation of shield tunnel instability. Results demonstrate that pipe‐roof support enhances stability via the “soil‐arching barrier effect,” effectively restraining failure wedge development by extending stress transfer paths ...
Zhi Jia +4 more
wiley +1 more source
Energy Science &Engineering, EarlyView.General framework of ensemble learning technique for transformer fault diagnostics compared with traditional dissolved gas analysis methods. ABSTRACT This paper implemented a comprehensive variety of modern machine‐learning techniques, which were demonstrated to be effective in handling complex tabular data, generating accurate predictions, and ...
Osama E. Gouda +3 more
wiley +1 more source
Inrush current method of transformer based on wavelet packet and neural network
The Journal of Engineering, 2018 The transformer is an important equipment of power system; its operation state is directly related to the security and stability of the power system. Aiming at the problem that the differential protection of power transformer has been plagued by inrush ...
Wei Wang +5 more
doaj +1 more source
Hybrid Wiener-Hammerstein Structure for Grey-Box Modeling of DC-DC Converters [PDF]
, 2009 In this work a generic hybrid model for dc-dc converters is proposed. The protections and remote control functions are managed by the logic system (event driven behaviour) and the power stage and control is modelled by a Wiener-Hammerstein structure. The
Alou Cervera, Pedro +4 more
core +1 more source
High Voltage, EarlyView.ABSTRACT The breathing system of an oil‐immersed transformer is of vital importance for maintaining equilibrium between internal and external pressures, with any malfunction potentially disrupting the transformer's stable operation. This study develops a thermal–fluid–structure interaction (TFSI) model to simulate the breathing phenomenon in a 110 kV ...
Lujia Wang +5 more
wiley +1 more source
Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2017 Principles of implementation of current protection of elements of electric power systems with power transformers are considered. In some cases, in facilities with power transformers there could be an inrush of a magnetizing current that can cause a false
F. A. Romaniuk, A. G. Shapozhnikova
doaj +1 more source
Gong-kuang zidonghua, 2021 The current researches on the application of direct current resistivity method in coal seam floor water inrush monitoring mainly focus on the resistivity response characteristics of the deformation and damage of the floor, and there are few researches on
LU Jingji
doaj +1 more source
Power quality and electromagnetic compatibility: special report, session 2 [PDF]
, 2015 The scope of Session 2 (S2) has been defined as follows by the Session Advisory Group and the Technical Committee: Power Quality (PQ), with the more general concept of electromagnetic compatibility (EMC) and with some related safety problems in ...
Desmet, Jan +2 more
core +1 more source
Electronic suppression of transformer inrush currents
International Journal of Electrical Power & Energy Systems, 1988 Abstract A novel electronic technique for suppressing transformer inrush currents is outlined. The suppression concept is based on the generation of a time-expanding triggering signal controlling an electronic switch which is connected to the primary winding of the transformer.
El-Hosseiny T. El Shirbeeny, A.Y. Yakka
openaire +1 more source
High Voltage, EarlyView.ABSTRACT The double‐break vacuum circuit breakers (VCBs) that utilize series break technology effectively increase the switching capability for capacitive currents, elevate the withstand voltage level, and reduce the likelihood of restrike, all without compromising the breaking capacity for short‐circuit currents.
Yun Geng +6 more
wiley +1 more source