Overhead Power Lines: Argaki area in Moni, Limassol

Transcription

1 The measurements were performed on the 21st of September 2011 at 11:50 am during clear weather conditions. The EMF measurements were performed inside the plot area in direct proximity to the overhead power line. The following figures provide pictures of the area where EMF measurements were recorded. {mosmap width='500' height='400' lat=' ' lon=' ' zoom='18' zoomtype='large' zoomnew='0' maptype='satellite' showmaptype='1' overview='0' text='overhead Power Lines: Argaki area in Moni, Limassol' tooltip='dwo' marker='1' align='center' key=abqiaaaa03cwbwhnzyjizsn-wwdqmhqctkyp5l8hb2mjngvvfkvpdgzbixqkqitrafigip chx6gplphdidvzga} Σελίδα 1 / 6

2 The area has five different overhead power lines neighboring the plot area: The first overhead power line "Moni-Vasilikos" is of rated voltage of 132kV and rated maximum nominal power of 290 MVA. At the time when the measurements were performed, the load of the overhead power line was 50 MW and 10 MVar. The Resultant Load of all three phases for the "Moni-Vasilikos" was 17.58% utilization of the nominal load power. The second overhead power line "Moni-Tsimentopoiio" is of rated voltage of 66kV and rated maximum nominal power of 23 MVA. At the time when the measurements were performed, the load of the overhead power line was 0.34 MVA. The Resultant Load of all three phases for the "Moni- Tsimentopoiio" was 1.48% utilization of the nominal load power. The third overhead power line "Moni-Pyrgos" is of rated voltage of 66kV and rated maximum nominal power of 75 MVA. At the time when the measurements were performed, the load of the overhead power line was 12 MW and Σελίδα 2 / 6

3 2 MVar. The Resultant Load of all three phases for the "Moni-Pyrgos" was 16.22% utilization of the nominal load power. The forth overhead power line "GCC" is of rated voltage of 11kV and rated maximum nominal power of 6 MVA. At the time when the measurements were performed, the load of the overhead power line was 2.1 MVA. The Resultant Load of all three phases for the "GCC" was 35% utilization of the nominal load power. The fifth overhead power line "Kellaki" is of rated voltage of 11kV and rated maximum nominal power of 6 MVA. At the time when the measurements were performed, the load of the overhead power line was 1.52 MVA. The Resultant Load of all three phases for the "Kellaki" was 25.33% utilization of the nominal load power. Limiting exposure values have been provided by the ICNIRP recommendations and are guidelines to many countries and organisations. The exposure limits at 50 Hz are tabulated in the following table according to the limits given by ICNIRP. Reference levels for Occupational exposure ICNIRP Frequency Electric Field Strength, E (V/m) Magnetic Field Strength, H (A/m) Magnetic Flux Density, B (µt) 50 Hz Reference levels for General Public exposure ICNIRP Frequency Electric Field Strength, E (V/m) Magnetic Field Strength, H (A/m) Magnetic Flux Density, B (µt) 50 Hz 5000 Σελίδα 3 / 6

4 Table 1: ICNIRP exposure limits for Occupational and General public exposure The maximum obtained magnetic field values are represented below and compared to the ICNIRP specified limits for the General Public. The highest magnetic field value was observed while performing the measurements in parallel with the overhead power lines (9m from the starting point at height 1m), with a value μt and a percentage of % as compared to the ICNIRP General Public standard. The following table summarizes the magnetic field measurements taken in area under investigation. Magnetic Field Measurements Distance /m Maximum Magnetic Field (μt) at Z Height /m - Percentage of ICNIRP General Public Standard /% 0.3m 1m 1.75m EMF Field Measurements - Line Measurements in paral 0.08 Σελίδα 4 / 6

5 % 0.08 EMF Field Measurements - Line Measurements perpendicular to the overhead power lines % % 0.08 Table 2: Magnetic Field Measurements Also, the maximum obtained electric field values are represented below and compared to the ICNIRP specified limits for the General Public. The highest electric field value was observed while performing the measurements in parallel with the overhead power lines (5m from the starting point at height 1.75m), with a value V/m and a percentage of % as compared to the ICNIRP General Public standard. The following table summarizes the electric field measurements taken in the area under investigation. Electric Field Measurements Distance /m Maximum Electric Field (V/m) at Z Height /m - Percentage of ICNIRP General Public Standard /% 0.3m Σελίδα 5 / 6

6 1m 1.75m EMF Field Measurements - Line Measurements in paral % % EMF Field Measurements - Line Measurements perpend % 4.20 Table 3: Electric Field Measurements Σελίδα 6 / 6