High Voltage Power Line Electromagnetic Environment Simulation System And Its Biological Effects

With high voltage power line being extensively distributed in industry,living environment of dense population cities, and transportation voltage being increased,etc, the interaction between power frequency EMF near power line and biological system, and influence on inhabitant health are given more attention. This thesis describes present researches in the field. Some epidemiological investigations and bio-electromagnetic phenomenon are introduced. The mechanism of athermal bio-effects are given some theoretic models are summarized. The EMF intensity and distributions of high voltage power line with 110kV and 220kV is measured on the spot, and are compared with theoretical simulations and actual investigations. A adjustable experimental system simulating power frequency EMF under power line is built up for irradiating animals. It consists of three parts. First is irradiation spaces, second is high-voltage generator that can output direct currents and alternating currents, third magnetic generator that can offer alternating magnetic field. Simultaneously, some related prophase animal experiments have been carried about the nerve electrophysiology. The methodology of experimentation and the technology of processing faintly physiological electric signal are groped and analyzed. Finally, the paper discuss defensive measures against power frequency EMF irradiation,principle to set up irradiation standard,and brings forward some opinions on how to decrease EMF irradiation when building super-high voltage transmission line. And puts forward some especially noticeable problems about bio-effect experiments and several suggestions to subsequent experiments.