Analysis of magnetic fields produced far from electrical power lines

2002 ◽  
Author(s):  
W.T. Kaune ◽  
L. Zaffanella
Keyword(s):  
Magnetic Fields ◽  
Electrical Power ◽  
Power Lines

Simulation of magnetic fields in the vicinity of electrical power lines

2002 ◽  
Vol 14 (1-4) ◽  
pp. 331-335
Author(s):  
Andrew Nafalski ◽  
Nirmal Roy ◽  
Özdemir Göl
Keyword(s):  
Magnetic Fields ◽  
Electrical Power ◽  
Power Lines

scholarly journals Adult mortality from leukemia, brain cancer, amyotrophic lateral sclerosis and magnetic fields from power lines: a case-control study in Brazil

2011 ◽  
Vol 14 (4) ◽  
pp. 580-588 ◽  
Author(s):  
Izabel Marcilio ◽  
Nelson Gouveia ◽  
Mário Leite Pereira Filho ◽  
Leeka Kheifets
Keyword(s):  
Amyotrophic Lateral Sclerosis ◽  
Magnetic Fields ◽  
Transmission Lines ◽  
Brain Cancer ◽  
Case Control Study ◽  
Adult Mortality ◽  
Case Control ◽  
Power Lines ◽  
Control Study ◽  
Lateral Sclerosis

Recent publications renewed interest in assessing potential health risks for subjects living close to transmission lines. This study aimed at evaluating the association of both distance of home address to the nearest overhead transmission line and of the calculated magnetic fields from the power lines and mortality from leukemia, brain cancer, and amyotrophic lateral sclerosis. We carried out a death certificate based case-control study accessing adult mortality in the Metropolitan Region of São Paulo, in Brazil. Analysis included 1,857 cases of leukemia, 2,357 of brain cancer, 367 of amyotrophic lateral sclerosis, and 4,706 as controls. An increased risk for mortality from leukemia among adults living at closer distances to transmission lines compared to those living further then 400 m was found. Risk was higher for subjects that lived within 50 m from power lines (OR=1.47; 95% CI=0.99-2.18). Similarly, a small increase in leukemia mortality was observed among adults living in houses with higher calculated magnetic fields (OR=1.61; 95% CI=0.91-2.86 for those exposed to magnetic fields >0.3 µT). No increase was seen for brain tumours or amyotrophic lateral sclerosis. Our findings are suggestive of a higher risk for leukemia among subjects living closer to transmission lines, and for those living at homes with higher calculated magnetic fields, although the risk was limited to lower voltage lines.

scholarly journals Problems of Remote Temperature Measurement of Small Objects of Electricity Power Systems—On the Example of Lashing Clamps of Bridge Connections on High Voltage Poles

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 5041
Author(s):  
Waldemar Minkina
Keyword(s):  
Power Systems ◽  
Temperature Measurement ◽  
High Voltage ◽  
Thermal Imaging ◽  
Electrical Power ◽  
Point Of View ◽  
Power Lines ◽  
Electricity Power ◽  
Infrared Cameras ◽  
Bridge Connections

The article presents problems occurring during remote temperature measurement of lashing clamps of bridge connections on high voltage poles using thermal imaging cameras. The basic metrological parameters of thermal imaging cameras are described. On this basis, typical errors made during the inspection of high voltage lines supplying power substations are presented using infrared cameras. Researching the possible solutions for the problems of remote temperature measurement of small objects of electricity power systems—on the example of lashing clamps of bridge connections on high voltage poles in the proposed paper and showing the basic metrological aspects and parameters of thermal imaging cameras are important because, in this way, it is observed to eliminate costly interruptions in the supply of electricity associated with the breaking of power lines. Small objects are quite difficult to be controlled and monitored on large grids and on large powerline poles; thus, it is very challenging to interpret the data offered by thermograms. The problem of remote temperature measurement of small objects in electrical power engineering is very important from the point of view of the quality and reliability of electricity supply. Obtaining early warning information about the occurrence of overheating, e.g., on lashing clamps of bridge connections, is very important, as it eliminates costly interruptions in the supply of electricity associated with the breaking of power lines supplying high voltage switchgears or substations.

scholarly journals Investigation of the Effects of the Arc Fault Resistance and Transient Resistance on the Overcurrent Ground Relay Protection Setting in Medium Voltage Electrical Power Lines

2020 ◽  
Vol 4 (1) ◽  
pp. 67-72
Author(s):  
Plamen Antonov Stanchev ◽  
Mediha Enver Mehmed-Hamza
Keyword(s):  
Power Transformer ◽  
Electrical Power ◽  
Relay Protection ◽  
Power Grids ◽  
Power Lines ◽  
Medium Voltage ◽  
Fault Resistance ◽  
Ground Fault ◽  
Determining Factors ◽  
Transient Voltages

In the medium voltage electrical power lines, the most common fault is the phase to ground fault. The determining factors for selection of the neutral grounding mode of the medium voltage electrical power lines are the selectivity of the relay protection, the transient voltages during phase to ground fault, the magnitude of the fault currents, etc. The paper studies the influence of the transient resistance of phase to ground fault on the selectivity and sensitivity of the earth fault protection when the neutral of the power transformer is grounded through active resistance in medium voltage power grids.

scholarly journals DISTÂNCIA DA REDE ELÉTRICA QUE VIABILIZA O USO DE MOTORES DIESEL EM ÁREAS IRRIGADAS DO BRASIL

Irriga ◽  
2007 ◽  
Vol 12 (2) ◽  
pp. 263-272 ◽  
Author(s):  
Rodrigo Otávio Câmara Monteiro ◽  
Priscylla Ferraz ◽  
Rubens Duarte Coelho ◽  
Ronaldo Antônio do Santos
Keyword(s):  
Electric Power ◽  
Rural Areas ◽  
Electrical Power ◽  
Electric Energy ◽  
Power Lines ◽  
Electric Motors ◽  
Irrigation Systems ◽  
Diesel Motors ◽  
The One ◽  
Agricultural Areas

DISTÂNCIA DA REDE ELÉTRICA QUE VIABILIZA O USO DE MOTORES DIESEL EM ÁREAS IRRIGADAS DO BRASIL  Rodrigo Otávio Câmara Monteiro; Priscylla Ferraz; Rubens Duarte Coelho; Ronaldo Antônio do SantosEscola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo, Piracicaba, SP [email protected]  1 RESUMO             Na maioria das regiões do país, a energia elétrica aparece como a alternativa, economicamente mais viável, no acionamento de bombas em áreas irrigadas, o que justifica seu uso por aproximadamente 70% dos irrigantes. No entanto, em determinadas situações, não se dispõe, nas proximidades, de rede elétrica, o que passa a viabilizar o uso de motores diesel. Este trabalho, portanto, propôs a análise dos custos horários de bombeamento com a operação de motores diesel e elétricos nas 5 regiões do Brasil. Considerou-se as composições tarifárias verde, azul e convencional, período de irrigação de 2, 4, 6 e 8 meses por ano e operação no horário de ponta e fora de ponta. Para essa avaliação, foi considerado um motor diesel e elétrico, de potência comercial de 50 cv. O ponto de equilíbrio entre motor elétrico e diesel foi determinado pela distância da rede de energia elétrica até o local de consumo. A viabilidade de utilização dos motores diesel em relação ao acionamento de motores elétricos foi encontrada a partir de distâncias da rede de transmissão elétrica de1,32 a8,71 km, sendo a primeira a condição mais atrativa, encontrada na região Sudeste, com 2 meses/ano de irrigação, na tarifa convencional. UNITERMOS: Energia elétrica, irrigação, custo de bombeamento  MONTEIRO, R. O. C.; FERRAZ, P.; COELHO, R. D.; SANTOS, R.A. do. VIABILITY OF DIESEL MOTOR USE IN IRRIGATED AREAS OF BRAZIL DUE TO DISTANCE FROM ELECTRIC POWER LINES  2 ABSTRACT In most agricultural areas ofBrazil, electric power seems to be the most feasible economic alternate methods for the functioning of pumps in irrigated areas, therefore 70%  of irrigation systems use it. However, the viability of electric power lines is restricted to only one part of rural areas, making it necessary the implementation of diesel engines as a source of electrical power for water management. The aim of this study was to investigate the viability of the use of electric energy and diesel motors.  For this study, an electric motor and a diesel one, both of 50HP potency, were evaluated, taking into consideration the following variables: tax composition, areas of the country and number of operation hours per year. The viability of the diesel engine use in relation to implantation of electric motors was determined from  distances that ranged from1.32 kmup to8.71 kmbetween the consumption place and the electric power lines. The most favorable condition is the one found in  the southeast of the country: 2 irrigation months/year.KEYWORDS: Electric energy, irrigation, pump costs 

Maximizing power generation from ambient stray magnetic fields around smart infrastructures enabling self-powered wireless devices

2020 ◽  
Vol 13 (5) ◽  
pp. 1462-1472 ◽  
Author(s):  
Hyeon Lee ◽  
Rammohan Sriramdas ◽  
Prashant Kumar ◽  
Mohan Sanghadasa ◽  
Min Gyu Kang ◽  
...  
Keyword(s):  
Power Generation ◽  
Magnetic Fields ◽  
Energy Conversion ◽  
Electrical Power ◽  
Electric Energy ◽  
Wireless Devices ◽  
Self Powered

A magnetoelectric coupled magneto-mechano-electric energy conversion mechanism allows the generation of high electrical power from ambient stray magnetic fields around infrastructures.

scholarly journals The impact of power lines on phytocenoses of the regional reserve “Uporovsky”, Tyumen Region, Russia

2020 ◽  
Vol 164 ◽  
pp. 07030
Author(s):  
Elena Popova
Keyword(s):  
Nature Reserve ◽  
Power Transmission ◽  
Electrical Power ◽  
Power Line ◽  
Power Lines ◽  
Individual Species ◽  
Right Of Way ◽  
Synanthropization Index ◽  
The Right ◽  
The Impact

The article reflects the results of anthropogenic impact on phytocenoses of the territory of the Uporovsky regional nature reserve (Uporovsky district, Tyumen region, Russia). On the territory of the Uporovsky regional nature reserve (Uporovsky district, Tyumen region) there is a 110 kV electrical power transmission line (power line) which has the length of 8 kilometers and the right-of-way width of about 30 meters. This power line is undoubtedly the main source of anthropogenic electromagnetic radiation in this area. The degree of participation of individual species in the herbage was determined by taking into account their relative abundance. When exposed to the power lines in the right-of-way area, flora biodiversity decreases due to the loss of a number of species. The effect of electromagnetic fields causes transformation of the vegetation cover, synanthropization and the subsequent complete destruction of natural vegetation. To determine the degree of anthropogenic load on the studied phytocenoses, the synanthropization index is determined. In the synanthropic fraction of the flora, 30 species belonging to 12 families were identified. The synanthropization index of the studied phytocenoses ranges from 6.6% to 81.2%. The largest number of synanthropic species is observed in the anthropogenic area.

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