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《High Voltage Engineering》 2011-12
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Test and Analysis on Effect of High Voltage Transmission Lines Corona Radio Interference and Scattering to GPS Signal

LIU Xing-fa1,YIN Hui2,WU Xiong1,ZHANG Jian-gong1,PEI Chun-ming1,GAN Zhe-yuan1(1.Hubei Province Key Laboratory of Power Network Environmental Protection,State Grid Electric Power Research Institute,Wuhan 430074,China; 2.School of Geodesy and Geomatics,Wuhan University,Wuhan 430072,China)  
To analyze the interference from the high voltage transmission lines to GPS signal receiving,we analyzed the interference from the high voltage transmission lines including corona radio interference and electromagnetic scattering to GPS satellite signal.The radio interference caused by high voltage transmission line wires corona is mainly below 10 MHz.The electric power fittings and insulator producto radio interference contains more than 30 MHz,due to the influence of high frequency set skin effect,pulse interference current in the conductors reduced in attenuation,so more than 30 MHz interference is considered to be the unconnected-distribution.Through the comparison of high voltage transmission line before and after a charged positioning error analysis,the influence of high voltage transmission lines on GPS receiving signals is analyzed;High voltage transmission lines as a large structure of GPS satellite signal scattering change the satellite signal amplitude,phase and path,and GPS receivers may produce positioning error.Through the field test,data received from 24 spots are tested.The test results show that,with the points test line 0 m,far from 30 m,60 m,120 m and 180 m,coordinate precision hardly changes,and no obvious rule of distance is found.GPS in high voltage transmission line erea can reduce theprotection distance of 50 m.
【Key Words】: high voltage transmission lines global positioning system(GPS) radio interference electromagnetic scattering positoning precision effect carrier phase positioning
【Fund】: 国家自然科学基金(51077105)~~
【CateGory Index】: TN967.1;TM726.1
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