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Study of the Influence High-voltage Power Lines on Environment and Human Health (Case Study: The Electromagnetic Pollution in Tebessa City, Algeria)
DIB Djalel,
MORDJAOUI Mourad
Issue:
Volume 2, Issue 1, February 2014
Pages:
1-8
Received:
8 January 2014
Published:
20 February 2014
Abstract: In this paper we present a modeling and simulation, the methodology for calculating the electromagnetic field radiated by the high voltage (HV) lines and for selection of analytical models that interpret the electric and magnetic fields as a function of the distance to the target object. The results were compared with measurements carried out on site where the HV lines are present through a neighborhood of a large agglomeration in the city of Tebessa, for over 50 years. Following published standards establishing the human to HV power line distances for professional exposure or in the case of low frequency field exposure the results obtained by calculations /simulation and measurement in this work, enable us to recommend possible solutions for the electromagnetic pollution issues in the town of Tebessa and thus to reduce the permanent danger to the public considering also the legislative vacuum and the poor preoccupation of official authorities.
Abstract: In this paper we present a modeling and simulation, the methodology for calculating the electromagnetic field radiated by the high voltage (HV) lines and for selection of analytical models that interpret the electric and magnetic fields as a function of the distance to the target object. The results were compared with measurements carried out on si...
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Design of a Photovoltaic System as an Alternative Source of Electrical Energy for Powering the Lighting Circuits for Premises in Ghana
Christian Kwaku Amuzuvi,
Emmanuel Effah
Issue:
Volume 2, Issue 1, February 2014
Pages:
9-16
Received:
19 December 2013
Published:
28 February 2014
Abstract: This paper seeks to emphasise the tendency of the use of solar energy as an alternative source of energy for today as far as the lighting needs of a particular infrastructure is concerned. It compares the use of a Photovoltaic (PV) System and an existing 60 kVA generator that powers a premise. The paper provides a general understanding of a solar energy (renewable energy) and how photovoltaic technology can be practically applied to power the lighting needs of the premise. Analysis of the site, weather data, and the design predicted the value of the photovoltaic system as an economic investment. We present the analysis undertaken using the PVSYST software package to optimize the system design for the premise. The simulation and calculation was done with the consideration of a PV array’s tilt and direction and economic considerations. The proposed photovoltaic system for the premise, with 30 units of battery capacity of 17850 Ah, an inverter size of 132 kW and a minimum number of 8 modules at 12.53 kWp was sufficient for the proposed design. The output analysis when implemented will result in a substantial lifetime energy savings, improving reliability and provide a great impact on the environment. It is therefore worthwhile to invest in photovoltaic renewable energy systems to augment the energy needs of locations where its use is viable.
Abstract: This paper seeks to emphasise the tendency of the use of solar energy as an alternative source of energy for today as far as the lighting needs of a particular infrastructure is concerned. It compares the use of a Photovoltaic (PV) System and an existing 60 kVA generator that powers a premise. The paper provides a general understanding of a solar e...
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Application of Rayleigh Probability Density Function in Electromagnetic Wave Propagation
Issue:
Volume 2, Issue 1, February 2014
Pages:
17-21
Received:
31 January 2014
Published:
20 March 2014
Abstract: In this study, signal voltage obtained at the receiver is investigated by taking the Rayleigh Probability Density Function into account. Probability of received signal and occurrence of incoming signal between two levels are also studied. Success percentage, requirement of how much the receiver is to be modified and variation of voltage or power at the output with respect to time are simulated in MATLAB for various physical environments.
Abstract: In this study, signal voltage obtained at the receiver is investigated by taking the Rayleigh Probability Density Function into account. Probability of received signal and occurrence of incoming signal between two levels are also studied. Success percentage, requirement of how much the receiver is to be modified and variation of voltage or power at...
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Voltage Stability Assessment for Distributed Generation in Islanded Microgrid System
Saleh A. Gareh,
B. C. Kok
Issue:
Volume 2, Issue 1, February 2014
Pages:
22-27
Received:
4 February 2014
Published:
20 March 2014
Abstract: The increasing energy demands are stressing the generation and transmission capabilities of the power system. Distributed generation (DG), which generally located in distribution systems, has the ability to meet some of the growing energy demands. However, unplanned application of individual distributed generators might cause other technical problems. The Microgrid concept has the potential to solve major problems arising from large penetration of DG in distribution systems. This project proposes a simulation approach to study voltage stability index (VSI) and voltage stability analysis in Microgrid system for the improvement of the dynamic voltage stability in a microgridin case of the dynamic voltage in sufficiency. A model of IEEE-14 Bus System has been presented as a case study of an islanded microgird system. This project also presented line voltage stability index analysis which accurately calculates voltage stability analysis at each transmission line and precisely predicts voltage collapse on power systems. A formula to calculate VSI has been derived and applied on two cases on the system. To show the effectiveness of the proposed microgrid system, this approach is implemented in a microgrid system (14-bus, 20 lines) in PSAT, which is a MATLAB toolbox environment. The test system has four diesel DGs and a wind turbine connected with eleven constant loads. A dynamic simulation of the test system is carried out for the cases for various disturbances. Islanded mode of operation is considered in this study. FVSI and voltage stability analysis were successfully implemented and analyzed.
Abstract: The increasing energy demands are stressing the generation and transmission capabilities of the power system. Distributed generation (DG), which generally located in distribution systems, has the ability to meet some of the growing energy demands. However, unplanned application of individual distributed generators might cause other technical proble...
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Development of MATLAB-Based Software for the Design of the Magnetic Circuit of Three-Phase Power Transformer
Obinwa Christian Amaefule,
Afolayan Jimoh Jacob,
Akaninyene Bernard Obot
Issue:
Volume 2, Issue 1, February 2014
Pages:
28-35
Received:
12 February 2014
Published:
30 March 2014
Abstract: Essentially, transformers consist of two electrical conductors called the primary winding and the secondary winding which are coupled magnetically together by a magnetic circuit. Transformers work based on the principle that energy can be efficiently transferred by magnetic induction from one winding to another winding by a varying magnetic field produced by alternating current. The magnetic circuit or core of a transformer is designed to provide a path for magnetic field, which is necessary for induction of voltages between the windings. In this paper, MATLAB-based software was developed for automatic computation of the magnetic circuit parameters of a three phase power transformer once the input specifications are supplied. A sample design problem was used to demonstrate the effectiveness of the program. Apart from its flexibility and speed, the program removed the drudgery involved in the design. In addition, the MATLAB-based software presented in this paper will serve as a useful teaching and laboratory tool for undergraduate courses in transformer design
Abstract: Essentially, transformers consist of two electrical conductors called the primary winding and the secondary winding which are coupled magnetically together by a magnetic circuit. Transformers work based on the principle that energy can be efficiently transferred by magnetic induction from one winding to another winding by a varying magnetic field p...
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