Results 251 to 260 of about 42,002 (276)

Automatic compensation technique for alternating current metrology based on synchronous filtering

Review of Scientific Instruments, 1998
In alternating current electrical metrology, the balancing procedure is the act of reduction to zero of a measured terminal-pair voltage (or current), accomplished via injection of a compensation voltage (current) in the circuit. An automatic compensation technique is described here: the terminal-pair voltage is continuously sensed, by means of vector ...
CALLEGARO, LUCA, D'ELIA V.
openaire   +3 more sources

Estimation of Alternator Rotor Angle by using Synchronized Voltage and Current Phasors

2020 IEEE Calcutta Conference (CALCON), 2020
Online monitoring of the rotor angle stability of large interconnected power system is a complicated job due to peculiar dynamics. In this paper, a methodology for estimation of alternator rotor angle by using empirical modelled reactance, voltage and current phasors measured from phasor measurement units (PMUs) is presented.
Mukesh Kumar, Shaik Affijulla
openaire   +1 more source

New hot wire anemometer with alternate current and synchronic detection

SPIE Proceedings, 2009
The feasibility of hot wire anemometer in to a new measurement configuration is demonstrated in this work and we validate our results by a numerical model. We have created an anemometer probe with hot wire using a new scheme, in alternate current and synchronic detection (3ω method). We use this instrument to register the velocity magnitude in boundary
Monica Stoian, Adil Rachek, Mihai Chirtoc   +2 more
openaire   +1 more source

Control-Action Optimization in Synchronous Reluctance and Inductor Alternating-Current Drives

Russian Electrical Engineering, 2018
An algorithm for optimizing the control action in the torque contours of synchronous reluctance and inductor ac drives is described in this paper. It allows one to search for an optimal principle for electric-drive operation that is suitable for any electromechanical converter with magnetic asymmetry of the rotor.
A. N. Gorozhankin, A. A. Gryzlov, A. T. Tsirkunenko, A. M. Zhuravlev   +3 more
openaire   +1 more source

Synchronous multi-species alternations between the northern Humboldt and Kuroshio Current systems

Deep Sea Research Part II: Topical Studies in Oceanography, 2019
Abstract Synchrony of species alternations in the northern Humboldt (NHCS) and Kuroshio (KCS) Current systems was examined by comparing time series data of landings and population statistics of major small pelagic fish species along with climate indices from 1960 to 2015.
Yoshioki Oozeki, Miguel Ñiquen Carranza, Akinori Takasuka, Patricia Ayón Dejo, Hiroshi Kuroda, Jorge Tam Malagas, Takeshi Okunishi, Luis Vásquez Espinoza, Dimitri Gutiérrez Aguilar, Hiroshi Okamura, Renato Guevara Carrasco   +10 more
openaire   +1 more source

Eddy‐current computation on a one pole‐pitch model of a synchronous claw‐pole alternator

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 2003
This paper deals with 3D finite‐element calculation of eddy currents in the claws of a claw‐pole alternator taking the rotational geometry movement into account. Two transient edge‐based vector formulations are utilised. The reduction of the model to only one pole pitch in combination with a special boundary pairing in the air gap for the applied lock ...
Kaehler, Christian, Henneberger, Gerhard
openaire   +2 more sources

Eddy-current computation in the claws of a synchronous claw-pole alternator in generator mode

IEEE Transactions on Magnetics, 2002
This paper deals with the three-dimensional finite-element (FE) calculation of eddy currents in the claws of a claw-pole alternator taking the rotational geometry movement into account. For this calculation a transient edge-based A/spl I.oarr/, A/spl I.oarr/ - T/spl I.oarr/ formulation is utilized. The generation of the FE model with a special focus on
C. Kaehler, G. Henneberger
openaire   +1 more source

Thermal Modeling of a Hybrid Excitation Synchronous Generator with Alternated Current Linkages for Stand-Alone Power Supply

International Review of Electrical Engineering (IREE), 2015
This paper presents the thermal modelling and analysis of a hybrid excitation synchronous generator with alternated current linkages (HESG-ACL) for stand-alone power supply. The HESG-ACL belongs to a class of hybrid excitation synchronous machines (HESMs), which combine the merits of electrically excited synchronous machines (EESMs) and permanent ...
Yulia Alexandrova, Katteden Kamiev, Valeriy Zaboin, Juha Pyrhönen   +3 more
openaire   +1 more source

Calculation of synchronous reactances of small permanent-magnet alternating-current motors: comparison of analytical approach and finite element method with measurements

IEEE Transactions on Magnetics, 1998
The synchronous reactances of permanent magnet (PM) motors have been determined using: (1) analytical method, i.e., form factors of the stator field (armature reaction factors), (2) finite element method (FEM), and (3) experimental tests on a special machine set.
J. GIERAS, SANTINI, Ezio, M. WING
openaire   +1 more source

Placement multi flexible alternating current transmission system (FACTS) : Static var compensator (SVC) and static synchronous compensator (STATCOM) for improving voltage stability of 500 KV Java-Bali electrical power system

AIP Conference Proceedings, 2020
Demand for electricity is increasing rapidly, the consequence of this is a threat to the stability of the electrical system, one of which is the voltage stability. FACTS or flexible alternating current transmission system is an electronic equipment capable of regulating electrical power transmission that can be used to overcome stability problems. This
Chico Hermanu Brillianto Apribowo, Meiyanto Eko Sulistyo, Muhammad Hamka Ibrahim, Agus Ramelan, Subuh Pramono, Joko Slamet Saputro, Oktavian Listiyanto   +6 more
openaire   +1 more source