Analysis and measurement of magnetic field emission near high voltage transmission lines (HVTL)
Magnetic field is produced whenever current flow based on the Ampere's Law.
The study of magnetic field distribution in the vicinity of high voltage transmission
lines is very important due to its potential health effects. This is because
of the low frequency magnetic field from high voltage transmission lines which
today are very close to building in the cities, due to the rapid development. According
to WHO no real prove that magnetic radiation from power transmission
line is hazardous to the people however, still the researchers and the population
are concerned about it. This project is to analyze and measure the magnetic field
emission from various configurations of 132Kv high voltage transmission line.The
measurement was done by using EMDEX II Electric and Magnetic Field Digital
Exposure System,which is a hardware and software package designed to measure,
record, and analyze power frequency magnetic fields. The result shows that it is
very below the limit sets by ICNIRP.
We had developed some equations and Maltlab Graphic User Interface
for double circuit 132Kv vertical configuration based on Bio-Savart's law and
Maxwell's equations, to make easy for the researchers to calculate the magnetic
field, it was use the superposition method of multiple conductors. to collect data
both for time and distance varying in Batu Pahat, Malaysia. Furthermore, the
emission was high within 10:45 am to 11:15 am and from 1pm to 3:30pm, the
highest recorded value was 12mG. Based on our results there are a few number of
parameters that determine the magnetic field, namely the current magnitude, the
high of the conductor above the ground and the space between the conductors.
The correct phase arrangement can reduced the magnetic up to 91.5% and the
increment of 8m in the height will reduce 79% of magnetic emission.