Research On Key Technology Of Inductive Power Taking Of Transmission Lines And Design Of Power Taking Device

With the advancement of society and the rapid development of the power industry,emerging technologies such as smart grids and distribution network automation have begun to be promoted.People have higher and higher requirements for the stability,reliability and quality of power system transmission.Real-time monitoring of high-voltage transmission lines,various monitoring equipment and indicating equipment are arranged around the transmission lines,as an important means to improve the transmission system and improve the quality of power.Since the high-voltage transmission overhead lines are all located above the tower,the high-voltage cables are arranged underground,making it difficult to set up the power supply,which restricts the development of the power grid monitoring mechanism and intelligence.Therefore,how to provide a stable power supply for a large number of transmission monitoring devices has become an urgent problem to be solved.In this paper,the principle of induction power taking is analyzed,the formula is deduced,the maximum power formula of induction power is obtained,and the three-section power curve of induction power take-off is creatively obtained considering the factors of core saturation and load limiting conditions.Subsequently,the circuit structure of induction and power take-off is designed.The chopping mode of the bypass MOS switch is used.Based on the LTSpice circuit simulation software,the current and load equivalent resistance of different primary side are analyzed in detail,and based on ANSYS Maxwell.The electromagnetic coupling simulation analysis with ANSYS Simplorer was carried out to design and analyze the energy-carrying coil.Then three maximum power tracking algorithms for induction and power take-off of transmission lines are proposed.The model of the algorithm is established in Matlab & Simulink,and the simulation data is analyzed.The optimal scheme is obtained,the effectiveness is verified,and the improvement and optimization are combined with the actual situation..Finally,the physical production is carried out,and the two-phase transmission line induction power-taking device based on hardware controller and software controller is tested under open-loop and closed-loop conditions respectively,which realizes the maximum power tracking function and the designed induction power take-off device application.In the highpressure aviation warning ball,the mechanical structure of the uninterrupted installation is designed,and the joint test of the mechanical structure and the physical prototype of the circuit is completed.The inductive power take-off device studied in this project is comprehensive in function and widely used.It does not require additional energy,and energy saving and emission reduction will lead the innovation in the field of online monitoring technology and promote the intelligent development of the power industry.