Research Of Self-Powered Technology On Sensor Based On Ambient Energy Harvesting

Sensors are the detection terminals of various information quantities in the power grid,and are the infrastructure units of power dispatch,monitoring and control,online monitoring,and interconnected communication,providing a reliable guarantee for the stable operation of the power grid.However,with the development of smart grids,power grids have more stringent requirements for sensor performance,and the number of sensors demanded is increasing.Traditional single battery power cannot meet the demand for use,and the difficulty of operating and maintaining sensors has greatly increased.How to solve the reliable energy supply of sensors has become one of the important factors restricting the development of wireless sensor technology.This thesis summarizes several current environmental energy harvesting methods.According to the advantages and disadvantages of various energy harvesting methods,a scheme is designed to achieve current energy harvesting through electromagnetic induction.The magnetic core of the current transformer is analyzed by ANSYS Maxwell under different structures.Magnetic permeability,the current transformer energy acquisition device is set up to simulate the current-carrying bus for magnetic field energy extraction to realize the energy supply of the 12 V voltage stabilized new self-powered wireless current sensor node;for the current transformer energy acquisition start current limit problem,a combination is proposed The solution of piezoelectric composite material vibration energy extraction is a supplement to the small current energy extraction,which can provide an additional 288μW energy output in the case of 6A;optimize the topology of the subsequent power management circuit in the piezoelectric energy extraction and analyze it through Multisim simulation,so that The theoretical charging efficiency of the piezoelectric energy harvesting device is increased by 3 times;the magnetoelectric sensor is used as the current sensitive element,and the energy collection technology is used as the power source to continuously provide support.Data collection and communication are studied,and the wireless communication module is used to build a wireless current measurement system,realize the intelligence and automation of the whole process of current measurement,data acquisition,data storage and data transmission.