The Design Of Electromagnetic Environment Monitor System Of Ultra-high Voltage Transmission Line

Chinese electric power industry attaches great importance to the environmental protection of power grid construction.Since the 1980 s,China's first 500 kV power transmission engineering was designed,research on electromagnetic environment has been listed as key issue in the development of grid technology in China.Researchers in electric power technology field have done a lot study on power frequency electric field,power frequency magnetic field and audible noise.And they also made a lot of research results.At present,the completion acceptance of transmission projects have been included in the environmental protection law.The electromagnetic environment influence of transmission system is given full attention as an important index in all aspects of grid planning,designing,construction and operation.In general,the transmission and transformation project are based on its feasibility study report.The rationality of the site selection of transmission project has played a decisive role in the construction investment,construction speed and the safety and stability of the power grid operation.Among the different influencing factors of route selection,the primary one is the influence of electromagnetic environment which aims to monitor the electromagnetic environment around transmission line and analyze the presence or potential interference.And it can assess whether the influencing factor meets the relevant requirements.In recent years,with the construction of ultra-high voltage and ultrahigh-voltage transmission project,more and more demolition problems caused by electromagnetic environment have been aroused.At the same time,the impact assessment of electromagnetic environment is an important part of environmental evaluation so the monitor of electromagnetic environment information cannot be ignored.This thesis mainly designs an electromagnetic environment monitoring system of ultra-high voltage transmission line.The details are as follows.Firstly,this thesis introduces the research purpose and significance of electromagnetic environment monitoring system of ultra-high voltage transmission line,and then analyzes the research status of relevant technologies at home and abroad,and summarizes the development trend of electromagnetic environment monitoring technology.Secondly,simulation studies on the distribution of frequency electric field and frequency magnetic field around the ultra-high voltage transmission line through Ansoft Maxwell simulation software,and the corresponding electromagnetic field sensor is selected according to the simulation results.Thirdly,this thesis proposes the overall scheme of the electromagnetic environment monitoring system of ultra-high voltage transmission line.Which includes the electromagnetic environment information monitor device and the upper computer display interface.The design of monitor device includes software and hardware design.Hardware design includes power frequency electromagnetic field sensor signal processing circuit design,audible noise sensor signal processing circuit design,CPU module design,bluetooth wireless communication module circuit design and power supply module design.Software design includes main program design,ADC sampling software design,bluetooth wireless communication module software design,etc.The upper computer display interface design mainly includes parameter display design and database design.Finally,after completing the design of electromagnetic environment monitoring system of ultra-high voltage transmission line,the related performance of this system should be tested under ultra-high voltage transmission line.And after comparing with advanced instruments,the monitoring accuracy and reliability of the collection device can be verified.