Dynamic modelling and characterisation of vehicular power system considering alternator iron core and rectifier losses

2012 ◽  
Vol 2 (2) ◽  
pp. 58 ◽  
Author(s):  
S. Chiniforoosh ◽  
A. Davoudi ◽  
P. Alaeinovin ◽  
J. Jatskevich
Keyword(s):  
Power System ◽  
Dynamic Modelling ◽  
Iron Core

scholarly journals Dynamic Modelling and Response Characteristics of a Magnetic Bearing Rotor System With Auxiliary Bearings

1995 ◽  
Author(s):  
April M. Free ◽  
George T. Flowers ◽  
Victor S. Trent
Keyword(s):  
Dynamic Modelling ◽  
Magnetic Bearing ◽  
Rotor System ◽  
Rolling Element Bearing ◽  
Test Facility ◽  
Iron Core ◽  
Critical Feature ◽  
Response Characteristics ◽  
Rolling Element ◽  
Auxiliary Bearing

Abstract Auxiliary bearings are a critical feature of any magnetic bearing system. They protect the soft iron core of the magnetic bearing during an overload or failure. An auxiliary bearing typically consists of a rolling element bearing or bushing with a clearance gap between the rotor and the inner race of the support. The dynamics of such systems can be quite complex. It is desired to develop a rotordynamic model which describes the dynamic behavior of a flexible rotor system with magnetic bearings including auxiliary bearings. The model is based upon an experimental test facility. Some simulation studies are presented to illustrate the behavior of the model. In particular, the effects of introducing sideloading from the magnetic bearing when one coil fails is studied. These results are presented and discussed.

Dynamic Modelling of Wind Farm Grid Interaction

2002 ◽  
Vol 26 (4) ◽  
pp. 191-210 ◽  
Author(s):  
Anca D. Hansen ◽  
Poul Sørensen ◽  
Frede Blaabjerg ◽  
John Becho
Keyword(s):  
Power System ◽  
Wind Farm ◽  
Control Strategies ◽  
Dynamic Modelling ◽  
Normal Operation ◽  
Simulation Tool ◽  
Power System Simulation ◽  
Collection System ◽  
Wind Model ◽  
And Control

This paper describes a dynamic model of a wind farm and its nearest utility grid. It is intended to use this model in studies addressing the dynamic interaction between a wind farm and a power system, both during normal operation of the wind farm and during transient grid fault events. The model comprises the substation where the wind farm is connected, the internal power collection system of the wind farm, the electrical, mechanical and aerodynamic models for the wind turbines, and a wind model. The integrated model is built to enable the assessment of power quality and control strategies. It is implemented in the commercial dedicated power system simulation tool DIgSILENT.

scholarly journals Modeling and simulation of power system protection relays in a transmission-level application

2021 ◽  
Author(s):  
James P. Kelly
Keyword(s):  
Literature Review ◽  
Power System ◽  
System Analysis ◽  
Power Transmission ◽  
Current Transformer ◽  
Iron Core ◽  
System Protection ◽  
Bulk Power ◽  
Ground Distance ◽  
Transmission Level

This report presents the findings of an in-depth literature review on protective relaying. The project focuses on protection system practices which are relevant to transmission-level applications. Various implementations of differential, phase distance and ground distance relays were investigated and ultimately modeled in the Matlab Simulink environment. A further model for a saturable iron-core current transformer was also investigated and developed. These models were tested to ensure compliance with expected results. The developed relay and current transformer models are used to complete a detailed protection design for a sample power system. A small 230kV bulk-power transmission system is presented and modeled in the Simulink environment. A fault study is completed and current transformers are specified in accordance with IEEE standards. Bus and line protections are selected from the various implementations discussed in the report. The settings for all protection relays are developed in detail based on system analysis and the expert guidelines obtained from a wide literature review. The resulting protection design was tested in a systematic fashion and demonstrated to be effective.

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