| With the development of Chinese electric power technology,the convenience of people’s electricity consumption and the live standards of their has been greatly improved.At the same time,with the increasing demand for new energy such as photovoltaic energy and wind power,the safety and reliability of the power grid is bound to be challenged.As the electromagnetic environment of power grid becomes more and more complicated,the hidden danger of electromagnetic radiation comes with it.At present,researches on power frequency irradiation in power grid transmission and distribution environment and carrier irradiation in RF/microwave communication environment is in-depth,and some of their results have been obtained.However,further research is needed on the biological effects caused by the harmonic irradiation generated by signal modulated by above two signal.Therefore,based on the reconstruction of harmonic radiation environment in power grid,experimental analysis of harmonic radiation on animal balance perception are carried out which can provide some reference for the research of complex electromagnetic environment of power grid.The main work content of the thesis are as follows:(1)Aiming at the situation of low frequency harmonics and high frequency carrier in the current electric power environment,two scenarios of harmonic irradiation are proposed.The biological effects of harmonic irradiation are modeled by electromagnetic field digital simulation,and a research method to distinguish biological thermal effects and non-thermal effects by power density and specific absorption rate is proposed.(2)Aiming at the uncontrollability of harmonic irradiation in electric power environment,harmonic irradiation in electric power environment is reconstructed.Low frequency harmonic signal and high frequency carrier signal are generated by direct digital frequency synthesis and phase-locked loop frequency synthesis respectively.The harmonic irradiated signal is synthesized by mixing technique,and the power drive of the harmonic irradiated signal is completed by power synthesis technique.(3)Aiming at the emission of harmonic irradiated signal,the simulation and optimization of the irradiated antenna are completed by using electromagnetic simulation software,and the performance of the antenna is tested.Then the over-the-air test of harmonic irradiated signal is completed,and the consistency between the power density measured by the electromagnetic radiation tester and the theoretical calculation is verified.The verification platform of animal balance perception is successfully built to provide platform support for subsequent experiments.(4)In view of the influence of harmonic irradiation on biological balance perception,behavioral tests,temperature indicators,physiological indicators are carried out,and the differences between the experimental group and the control group are judged by one-way analysis of variance. |
