Current transformer induction powergeneration has the advantages of strong practicability

wide range of use andhigh safety

and it is expected to become the most effective energy supplymethod for online monitoring equipment of power system transmission cables.In order to solve the problems ofinsufficient low current energy extraction and high current saturation

thecurrent induction power extraction device often adopts the method of increasingthe volume and weight of the magnetic core.This method increases the loadbearing burden of the transmission cableand stretches the cable connection. Increasedstress and longterm operation will endanger the safety of the power system Therefore

based on the premise of reducingthe weight of the magnetic core

this paper adopts the particle swarm algorithmto globally optimize the magnetic core size

air gap size and the number ofturns of the coil. The simulation andexperimental results show that

on the basis of greatly reducing the weight ofthe magnetic core (only 1.2kg)

the output ofthe induction power device can reach 0.22W when the primary current is 15A

and the transmissionline can be guaranteed to be 15A.The effective output of energy within thecurrent range of 15~ 1

200A has certain application value.