Results 61 to 70 of about 1,744 (183)
Concept for a Case Study of a Large Electrical Engineering Enterprise [PDF]
, 1982 This concept for research on problems of innovation management of electrotechnical firms emerged from two ideas, the cores of which cut close to those set forth in the research proposal.
Goncharov, V. +6 more
core
IET Electric Power Applications, Volume 19, Issue 1, January/December 2025.This study investigated the influence of the selected electromagnetic field model on the calculation of the no‐load magnetic field of a tubular hydro generator. Straight and skewed stator slots were considered for the structure of the hydro generator. Three models were considered: the transient motion electromagnetic field‐circuit coupling model, the ...
Qi‐Rui Yin +4 more
wiley +1 more source
Practical Aspects Concerning the Digital Implementation of Complex Protection Functions for Hydrogenerators [PDF]
Journal of Electrical and Electronics Engineering, 2014 This paper shows how to implement several complex protection functions for synchronous hydrogenerators using PC-05/104 digital equipment. PC-05/104 also performs the monitoring and visualization of the voltages and currents rms values and phase shifts ...
PURCARU Dorina-Mioara +2 more
doaj
Influence of winding layout and airgap length on radial forces in large synchronous hydrogenerators [PDF]
, 2017 This paper investigates the flux density and radial force spatial harmonics in large salient pole synchronous hydro-generators. Vibration due to magnetic forces are mainly caused by low order harmonics in the airgap flux density distribution.
Engevik, Erlend L. +2 more
core +1 more source
International Transactions on Electrical Energy Systems, Volume 2025, Issue 1, 2025.This study proposed a modified passive islanding technique that combines over/under frequency (OUF), rate of change of frequency (ROCOF), rate of change of phase angle difference (ROCPAD), and rate of change of voltage (ROCOV) for sensing of islanding and nonislanding conditions.
Bemdoo Saka +4 more
wiley +1 more source
Journal of Electrical and Computer Engineering, Volume 2025, Issue 1, 2025.In the current study, a novel cooling technique has been developed to enhance the thermal characteristics of a permanent magnet generator (PMG) by integrating with an earth–air heat exchanger (EAHE). The paper introduces a comprehensive thermal model of PMG, calculating thermal resistances based on the dimensions of a chosen 500‐kW PMG as a case study.
Amany R. Nasr +3 more
wiley +1 more source
3D eddy current and temperature field analysis of large hydro-generators in leading phase operations
CES Transactions on Electrical Machines and Systems, 2019 As a common practice, a large hydro-generator will operate in leading phase conditions to absorb the reactive power of the power grid. However, the accurate and precise prediction of the leading phase operation capacity of a large hydro-generator has ...
Ning Wang, Huifang Wang, Shiyou Yang
doaj +1 more source
Selected Papers Compiled from Presentations - Leningrad Task Force Meeting, May 24-29, 1982, Leningrad, USSR [PDF]
, 1983 In line with the selected methodology, the Management and Technology area at IIASA decided to have the Innovation Management Task concentrate on sectors in an attempt to analyze the situation at this level of the economy before making any aggregations or
Goncharov, V., Vasko, T.
core
Use of Data-Driven Approaches for Defect Classification in Stator Winding Insulation [PDF]
, 2022 Partial discharges (PD) in the high voltage insulation systems are both a symptom and cause of terminal and impending failures. The use of data-driven methods based on PD measurements will enable predictive strategies to replace traditional maintenance ...
Aakre, Torstein Grav +4 more
core +2 more sources
Equipment for Predictive Maintenance in Hydrogenerators
AASRI Procedia, 2014 This paper presents an equipment for predictive maintenance in large hydrogenerators. This equipment uses techniques of digital signal processing of the information contained in the electrical variables involved in the operation of the generator. Basically, the current and voltage signals of the generator are monitored and applied the techniques of ...
Ribeiro, L.C. +7 more
openaire +1 more source