Research On Coupling Energy Extraction Technology Based On Overhead Line Insulation Ground Wire

In recent years,with the continuous development of smart grid and the continuous improvement of transmission voltage level of transmission lines,higher requirements are required for the safety,real-time performance and stability of transmission lines.On-line monitoring equipment equipped on the transmission line has the functions of real-time monitoring and accurate feedback of high-voltage transmission line parameters.Therefore,more and more monitoring equipment are carried on the transmission line.How to ensure the energy source of monitoring equipment on the transmission line has become an important factor affecting the development of smart grid.Can take way of equipments in the online often with photovoltaic panels and battery combination can take,this way can take take efficiency can be affected by the weather and have a short life and other shortcomings,and the traditional ground coupling can take problems can take ability limited,is only applicable to high voltage grade of transmission line the road,in view of the above problem,this paper put forward based on the principle of magnetic coupling resonant ground resonance coupling can take,effectively improve the capacity of the battery.This article first introduces the basic principle of coupling can take,to establish the equivalent circuit model of single insulated ground coupling can,and analyses the limitations of single insulated ground coupling can take,and on this basis,this article analyzes the double insulated ground coupling energy theory,establish the double insulated ground coupling can equivalent circuit model,and on the characteristics of the inductive circuit parameters.Secondly,in this paper,in order to improve the ability of coupling can take,coupling between the traditional ground can take on the basis of the magnetic coupling resonance theory put forward by the Massachusetts institute of technology for reference,puts forward the ground based on the theory of the magnetic coupling resonance can take resonator,and pushed the ground based on the theory of the magnetic coupling resonance can take resonator field-circuit coupling model,and numerical analysis are carried out using Matlab and Comsol simulation software and the field-circuit coupling finite element analysis,the simulation results proved that the proposed ground can take resonator compared with traditional way can improve the power of 100 w above.In addition,this paper introduces in detail the energy taking circuit power supply system design and the composition of each part,and in view of the line current instability leads to the output voltage instability of the problem,using the design of constant voltage source system to ensure the stable output voltageThe on-site test,and through the actual field data collection,sorting and compared with the theoretical data,analysis the difference between the theoretical value and practical value,analyze the differences between the impact factors and proposes the corresponding solution,the experimental results show that ground coupling can take technology makes the transmission line on-line insulation monitoring device can take way to get rid of the traditional way can take.In this paper,the ground resonance coupling energy taking based on the magnetic coupling resonance theory can effectively improve the power taking capacity,and can achieve sustained and stable energy taking,which has great practical value for improving the working stability and service life of online monitoring equipment.