Magazine Volume 2 Issue 2

The Importance of Power Quality on Appliance Safety - The Union Between Appliance Controls and Safety - Related Systems

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Philip F. Keebler, Kermit O. Phipps, Bill Howe

Electricity is used in homes to power end-use appliances, heating-ventilation-and-air-conditioning equipment (HVAC), information technology equipment, consumer electronic devices, and other end-use equipment. The majority of the electrical energy provided for residences is consumed by electric appliances and HVAC equipment. Both appliances and HVAC equipment require a number of internal safety systems...

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What is reliability? Reliability and Reliability Indices in the Viewpoint of the Network Operator and in the Viewpoint of the Customer

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Math H.J. Bollen, Mats Häger

This paper explains the different definitions of the term "interruption" as used by the network operator and individual customers, especially, industrial customers. The different viewpoints are strongly related to the different demands placed on these two stakeholders...

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Low Voltage, but High Tension

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Femmy M. Combrink, Peter T.M. Vaessen

A shift is taking place within low voltage (LV) networks. Electricity demand is growing, the amount of distributed generation is increasing, and more and more distributed generation (DG) techniques are being developed to fulfill the needs of end uses. These developments are having a large impact...

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Some Idea on Energy Consumption of Non-Linear Consumers

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Miklós Horváth, József Borka

The determination of energy consumption required by non-linear consumer results in numerous dilemmas. According to some conceptions the energy consumed by non-linear consumers ought to be calculated or measured by taking the favoured harmonic components only into considerations instead...

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Risk Evaluation of Results when Utilizing Software Simulations to Identify a Harmonic Offender in a Power System

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Willem Stemmet, Gary Atkinson-Hope

When evaluating harmonic software packages, some of the default element models (e.g.,six-pulse drive) and analysis methodologies used are different and cause risk to results. Another problem is when multiple drives are present, the injections from drives add vectorialy at the PCC...

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Mutual Interaction between a Harmonic Load and the Feeding Transformer

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Stefan Fassbinder

Transformers in public electricity grids do more than just provide galvanic isolation and alter the ratio of voltage by current for a given amplitude of apparent power. They also introduce a substantial portion of inductive reactance into the system, which is important for both the feeding grid's and the fed mains' behaviour in cases of...

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Interharmonics Generated by Induction Machines

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Jan Rusek

The paper presents results of calculations of interharmonics generated by a squirrel cage induction machine, in both the healthy and faulty operating conditions. Two case studies refer to broken bars and clutch wobbling...

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Spectral Analysis of Signals of Commutator DC Motor

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Zygfryd Głowacz, Antoni Zdrojewski

Measurement investigations have been carried out for commutator dc motor with internal assymetries. Construction of considered motor enables to realize the breaking of one rotor coil and shorting of two groups of rotor coils. Each group contains three rotor coils...

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Modern 3D Modelling, Visualization and Animation at Power Electrical Engineering Study Programme

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Hana Kuchyňková, Vitězslav Hájek

There is a tendency to enable a higher education for much more students in comparison with recent times. This, of course, concerns also technical universities. This aim calls for principally new modern methods of education, including creativity, invention and demonstration methods...

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