Journal Volume 7 Issue 2

Numerical Determinig Electrical Resistance and Reactance of Transmission Line

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Pavol Babarik, Pavol Novák

The paper deals with a numerical method for evaluation of electrical resistance and reactance of straight parallel conductros with different shapes of cross section - the method described by Enrico Comellini, Angelo Invernizzi, Giancarlo Manzoni [1] and simplified by...

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Last Updated on Saturday, 06 September 2014 10:01

Voltage Fluctuations Measurement - Experiment in the Industrial Environment

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Andrzej Bień, Andrzej Firlit, Piotr Folga, Eugeniusz Gallus, Zbigniew Hanzelka, Marek Hartman, Mansour Hashad, Jan Iwaszkiewicz, Robert Jarocha, Roman Mieński, Alicja Miłosz, Zbigniew Olczykowski, Ryszard Pawełek, Jerzy Priedka, Leonard Smajek, Tomasz Tarasiuk, Irena Wasiak

At one of Polish steelworks there was carried an experiment, which aim was measurement of voltage fluctuation parameters at the same point of supply network, by means of different measuring instruments, than on that basis assessment of credibility of ten selected flickermeters, available...

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Last Updated on Saturday, 06 September 2014 10:07

Understanding Premium Power Grades

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Mike Higgins, Arshad Mansoor, Ashok Sundaram

Many sensitive industrial and some high-tech commercial customers require a premium grade of power. However, the term "premium power" often elicits unrealistic expectations from those customers. To accurately quantify premium power, utilities must define a baseline for grid power so that customers...

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Last Updated on Monday, 08 September 2014 18:25

Evaluating Industry Specific Electrical Disturbances Using a Process Modeling and Simulation Tool

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Michael Howard, Tom Key, Rupy Sawhney

Electrical system-related disturbances cost the manufacturing industry several billion dollars per year in non-value-added expenses. In today's global economy, the need for elimination of these non-value-added expenses cannot be ignored. Elimination of these expenses requires the continued emphasis on...

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Last Updated on Monday, 08 September 2014 18:26

Power Quality Impact of Distributed Generation: Effect on Steady State Voltage Regulation

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Reginald Comfort, Manuel Gonzalez, Arshad Mansoor, Phil Barker, Tom Short, Ashok Sundaram

With the advent of deregulation, distributed generation will pay an increasing role in electric distribution systems. Various new types of Distributed Generation (DG), such as micro-turbines and fuel cells, are now being developed in addition to the more traditional solar and wind power...

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Last Updated on Monday, 08 September 2014 18:28

Capacity Planning, Reliability and Availability for Internet Data Center Facilities

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Ben Banerjee, Arshad Mansoor, Philip F. Keebler

Customers are increasingly sending e-messages, purchasing products, managing finances, and locating information on-line by accessing the World Wide Web via the Internet. The demand for e-services and the installation of telecommunications and Internet equipment is occurring at a very rapid pace resulting in...

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Last Updated on Monday, 08 September 2014 18:29

A Digital System to Measure Frequency and Amplitude of Power Grid Voltage

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Dariusz Borkowski

The paper presents complete, software-hardware solution of real-time measurement of frequency and amplitude of energetic voltage signal based on DSP processor. The hardware contains DSP board with A/D converter and 8051-based daughterboard with LCD and small keyboard...

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Last Updated on Monday, 08 September 2014 18:30

Compatibility Between Equipment and Supply with Regards Voltage Dips and Short Interruptions

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Rozmysław Mieński, Ryszard Pawełek, Irena Wasiak

Part 1: Determination of the Supplying Network Characteristic

This paper describes a simulation method which allows stochastic assessment of voltage dips and short interruptions that may be expected at a given node of any electrical power network due to faults occurring in it.

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Last Updated on Monday, 08 September 2014 18:46

Dynamic States of the Electric Arc in Controlled Current Supply Systems of Electrothermal Direct Current Devices

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Anatoli M. Krouchinin, Antoni Sawicki

Part 1. Transmittance of the Electric Arc

In this article a solution is given of differential equation representing the energy of the cylindrical part of an unstationary arc. Universal functions of conductance, radiation and enthalpy are introduced on the basis of the physical model of...

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Last Updated on Monday, 08 September 2014 18:33

Dynamic States of the Electric Arc in Controlled Current Supply Systems of Electrothermal Direct Current Devices

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Anatoli M. Krouchinin, Antoni Sawicki

Part 2. General Stability Conditions of Electric Arc Dynamic Systems

A new interpretation of Kaufmann criterion has been described in the paper. The criterion concerns a stability of electrical D.C. arc in the simple electrical circuit with an additional resistance. A chemical composition of plasmagenic gas and three methods of dissipation of energy arc in...

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Last Updated on Monday, 08 September 2014 18:33