Abstract
In order to solve the problem of insufficient energy supply of the on-line monitoring device of the transmission line, a sensor energy acquisition scheme directly installed on the transmission line is proposed. In the current power supply, induction power supply is a kind of energy extraction method with better practical applicability. Since the monitoring devices and electronic equipment on the transmission line are often in a strong magnetic field and high voltage environment, designing a stable and reliable power supply is the guarantee for the stable operation of the monitoring devices and electronic equipment. This paper presents a structure of energy-absorbing iron core with two semi-circular magnetic cores, and studies the magnetic saturation problem in the inductive power supply and the design of the DC output circuit.
Highlights
With the rapid development of the power grid, a large number of transmission lines inevitably pass through regions with harsh climates and complex environments during work operation
The stable operation of transmission lines is extremely vulnerable to damage [1,2]
Since the monitoring device operates under special working conditions, the power supply of the monitoring device becomes a difficult problem in the field [5]
Summary
With the rapid development of the power grid, a large number of transmission lines inevitably pass through regions with harsh climates and complex environments during work operation. There are four main ways to supply power to the monitoring devices and electronic equipment on the transmission line: battery power supply, laser power supply, new energy supply, and induction power supply. The advantages of laser energy supply are high stability, good insulation effect, low noise, and not easy to be interfered by electromagnetic field. From the aspects of practicability and cost performance, it can be seen that the inductive power supply method is a more suitable energy supply method for providing electrical energy to various environmental online monitoring devices and electronic equipment in various regions. In this paper, based on the way of induction power supply, the problems of voltage dead zone and protection of large current impulse faced by the induction power supply are studied, and the improvement scheme is proposed
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