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Experimental Identification of the Equivalent Conductive Resistance of a Thermal Elementary Model of an Induction Machine
R. Khaldi,
N. Benamrouche,
M. Bouheraoua
Issue:
Volume 3, Issue 2, March 2014
Pages:
15-20
Received:
30 January 2014
Published:
10 March 2014
Abstract: This paper proposes a basic thermal model to estimate the temperature in different points of an induction motor, totally enclosed with external ventilation, for different loads at steady state. This basic model consists simply of a conductive thermal resistance for each point considered in the machine. Thereafter, the intermediates thermal resistances of conduction of the model are deduced. This approach is very easy to implement, requiring no geometrical data, or thermo-physical coefficients, or complex methods of implementation of a thermal model. Indeed, by knowledge of total losses in the machine, the temperature of the carcass, and the temperature of any point inside of the latter allows to deduct the equivalent thermal resistance of conduction of the different points and so the corresponding temperature.
Abstract: This paper proposes a basic thermal model to estimate the temperature in different points of an induction motor, totally enclosed with external ventilation, for different loads at steady state. This basic model consists simply of a conductive thermal resistance for each point considered in the machine. Thereafter, the intermediates thermal resistan...
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Transient Stability Enhancement of 30 Bus Multi- Machine Systems by using PSS & Increasing Inertia
Nitin Mohan Lal,
Arvind Kumar Singh
Issue:
Volume 3, Issue 2, March 2014
Pages:
21-26
Received:
14 February 2014
Published:
10 March 2014
Abstract: In this paper the transient stability enhancement of a 30- bus multi-machine system by using Power system stabilizer and increasing inertia has been observed, as single method is not sufficient for this purpose. We have created a three phase fault at time 0.04 seconds at bus 7 and cleared at time 0.5 seconds. On implementing PSS and on increasing the inertia of the machine we achieved a better response in terms of power swing when compared with initial condition. The inertia of the machine is kept within a certain limit. And 30 bus multi-machine system maintain its own permissible operating condition.
Abstract: In this paper the transient stability enhancement of a 30- bus multi-machine system by using Power system stabilizer and increasing inertia has been observed, as single method is not sufficient for this purpose. We have created a three phase fault at time 0.04 seconds at bus 7 and cleared at time 0.5 seconds. On implementing PSS and on increasing t...
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A Fault Analysis of 11kv Distribution System (A Case Study of Ado Ekiti Electrical Power Distribution District)
Kehinde Olusuyi,
Ayodele Sunday Oluwole,
Temitope Adefarati,
Adedayo Kayode Babarinde
Issue:
Volume 3, Issue 2, March 2014
Pages:
27-36
Received:
19 February 2014
Accepted:
8 April 2014
Published:
10 April 2014
Abstract: The aim of this research work is to carry out fault analysis of 11KV distribution power system. Electric power is an essential facilitator for sustainable development of the modern nation state. While Nigeria is reported to suffer from severe shortages of electric power the condition of some of its newer constitutional units are unknown. In this work, electric power infrastructure and energy availability is studied for Ado-Ekiti, the principal economic and political hub of Ekiti State. During the study, the condition of all relevant equipment for power distribution at the 11 kV level was assessed. Power availability was also considered by collecting necessary data that had to do with energy supplied, faults and other outages. It was discovered that the distribution lines were in a rather poor state with as many as 25% of the poles not meeting a condition of "goodness", 33% of cross-arms being broken or unsatisfactory, about 10% of the insulators defective and almost 40% of the span not complying with standards. Hence this work presents a research on fault analysis of Ado Ekiti distribution power system.
Abstract: The aim of this research work is to carry out fault analysis of 11KV distribution power system. Electric power is an essential facilitator for sustainable development of the modern nation state. While Nigeria is reported to suffer from severe shortages of electric power the condition of some of its newer constitutional units are unknown. In this wo...
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Evaluation of Electricity Consumption of a Residential Flat in Egypt
Issue:
Volume 3, Issue 2, March 2014
Pages:
37-44
Received:
13 March 2014
Accepted:
9 April 2014
Published:
10 April 2014
Abstract: Energy saving is one of the most important demands in our world .The aim of this paper is to evaluate the annual electrical energy consumption of a residential flat in EGYPT and how to reduce it. This evaluation includes the compatibility of a flat for the Egyptian code requirements of residential buildings. This flat is of a total area of 160 m2 with one façade opening. A software package Visual-Doe 4.0 was used for this analysis. Three different climatic regions were used for this analysis: Cairo, Alexandria and Aswan cities with different weather conditions (due to their geographical location on latitude 30.1, 31.2 and 24 respectively). The results give the minimum requirements of walls insulation (2.5cm) for different orientation and different climatic location. Also an average maximum reduction of about 17.11 % of the total electrical energy consumption with insulation 5cm compared to the actual consumption is fulfilled
Abstract: Energy saving is one of the most important demands in our world .The aim of this paper is to evaluate the annual electrical energy consumption of a residential flat in EGYPT and how to reduce it. This evaluation includes the compatibility of a flat for the Egyptian code requirements of residential buildings. This flat is of a total area of 160 m2 w...
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Transient Stability Improvement by Using PSS and Increasing Inertia of Synchronous Machine
Pushpalata Khalkho,
Arvind Kumar Singh
Issue:
Volume 3, Issue 2, March 2014
Pages:
45-49
Received:
15 February 2014
Accepted:
11 April 2014
Published:
20 April 2014
Abstract: The main objective of this paper is to perform transient stability analysis using the electrical power system design and analysis software namely E-Tap. The purpose of performing transient stability on the power system is to study the stability of a system under various disturbances. The stability of the power system is the ability of generators to remain in synchronization even when subjected to disturbance. In this paper a 9-bus test system is considered fig.(1). Improvement of transient stability by coordination of PSS (Power System Stabilizer) and increasing inertia of synchronous machine has been observed
Abstract: The main objective of this paper is to perform transient stability analysis using the electrical power system design and analysis software namely E-Tap. The purpose of performing transient stability on the power system is to study the stability of a system under various disturbances. The stability of the power system is the ability of generators to...
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