The Research And Design Of Induction Power Supply Of On-line Monitoring Devices For Power Transmission Lines

With the rapid progress and development of science and technology and economy,the popularity of smart grid,the voltage level of transmission lines has been improved continuously.In order to monitor and measure the running status of the line and the operation parameters of the circuit in real time,more and more monitoring devices and electronic devices are installed in transmission lines to improve the stability of power supply system.For the monitoring devices and electronic devices on the transmission line are often in a strong magnetic field and high voltage environment,the design of a stable and reliable power supply is the guarantee for the stable operation of the monitoring device and the stable operation of electronic equipment.In order to solve the problem of the power supply of the transmission line monitoring device which can be operated for a long time and has enough power,this paper discusses a kind of energy acquisition scheme which is directly installed on the transmission line.In the current power supply,inductive power supply is a practical method of getting energy.This paper mainly studies the problem of magnetic saturation and power supply dead zone in the inductive power supply.First of all,the basic principle related to the inductive power supply is stated,and the relationship between the power supply and the parameters is discussed,and the factors that influence the magnetic saturation of the core.Then,in order to solve the problem that the magnetic core is easy to enter the saturation state,this paper carries out the related theoretical analysis and software simulation.The material for energy core chosed the silicon steel sheet with high magnetic induction strength.In this paper,the shape of the core is designed,which is made up of two C types of magnetic core.Because of the small gap between the two C types of magnetic core,the air gap reluctance will be produced,and for the existence of air gap reluctance,the magnetic core can be prevented from entering the magnetic saturation state too early.Through the calculation of the formula,the number of turns of the coil can be determined.Secondly,when the transmission line is struck by lightning and through the high current,in order to avoid the energy-gaining coils to induce a higher impact current,shock protection circuit has been accessed to after receiving the energy.At the same time,the function of the rectifying,filtering and voltage stabilizing circuit of the power supply has been compared and selected.In this paper,the LM2596ADJ switching integrated voltage regulator is used in order to get the stable power supply voltage and change the DC voltage to the stable DC voltage.Finally,the Multisim software is used to test and simulate the power supply,After testing the power supply,the output voltage from power supply basically meets the expected requirements,verify the stability of power supply.At the same time,the construction of the laboratory simulation platform is also carried out.