Research on Power Supply of Monitoring Equipment Based on Adaptive Voltage Stabilization Control

In order to solve the energy supply problem of the current transmission line and transformer monitoring equipment, a method of using energy-taking current transformer as the power source to provide energy is proposed. By analyzing the model of the transformer, the relationship between the output power and voltage and the magnetic core material, size and the number of turns on the secondary side is obtained. In order to reduce the initial current of the energy harvesting transformer, nanocrystalline alloy is selected as the magnetic core of the transformer, and the air gap is opened to prevent the core from being oversaturated. When the primary side current is too large, the MOSFET is paralleled in front of the load side, and the load voltage is stabilized by monitoring the primary side current from the adaptive adjustment of the square wave signal duty ratio of the input MOSFET. The simulation circuit is built by Multisim software, which verifies that the proposed method can achieve the stability of the load voltage through adaptive adjustment in the case of wide-range primary side current variation, and can meet the demand of continuous and stable power supply to monitoring equipment.