Electromagnetic radiation emissions from remote area power supply systems

摘要: There has been growing concern about the potential link between various health effects, such as cancer and chronic exposure to low level Electromagnetic Radiation (EMR). A report on residential 50 / 60 Hz electromagnetic radiation, published by United Kingdom’s National Protection Board (NRPB) found: “that there is some epidemiological evidence that prolonged higher levels of power frequency magnetic fields associated with a small risk leukaemia in children (AGNIR, 2001).” The concluded that: “heavy exposures 0.4μT (4 mG) or more are doubling under fifteen years age. The is, however, not conclusive Even though no scientific direct relationship EMR sufficient justify minimising levels. Regions particular interest spectrum Extremely Low Frequency (ELF) - Hz, Very (VLF) 10 100 kHz Radio (RF) 300 GHz bands. Remote area supply (RAPS) systems becoming increasingly prevalent. These tend use renewable energy sources their technology rather than conventual systems. Recently concerns have raised being emitted from these new forms technology. Some inverters transforming generated current (dc) alternating (ac) produced significant EMR. devices often located close living areas therefore increase hazards residents. While main aim replace non-renewable reduce greenhouse gas emissions, they should also be designed minimise doses which users exposed. This type still immature, innovations occurring rapidly. While currently proven design production reduced very emissions obvious advantages. thesis examines frequencies typical remote (RAPS). strengths measured using types monitoring equipment examined. research was conducted range RAPS including diesel generators inverters. Fields were at orientations function distance sources. Even above standards found 4 mG mark measured. This identified possible action for analysis results enables qualitative assessment leads set recommendations authorities sensible measures adopted