Power transmission line sectioned insulating overhead ground wire multi-point power accessing system based on electromagnetic induction

Abstract

The invention provides a power transmission line sectioned insulating overhead ground wire multi-point power accessing system based on electromagnetic induction. The system comprises an impact protection unit, a processing circuit and a monitoring unit, wherein the input end of the impact protection unit is respectively connected with an iron tower and a sectioned insulating overhead ground wire, the output end of the impact protection unit is connected with the input end of the processing circuit, and the monitoring unit is connected with the processing circuit to adjust the output voltage scope according to setting. The system allows directly accessing power from an earthed overhead ground wire, solves the insulation problem, and is suitable for monitor equipment on ground potential. The system has high engineering application value, and can be widely promoted. The system limits adverse influence on load supply voltage by fluctuation of ground wire voltage or current, and ensures safe use. A super capacitor is employed to power loads, which ensures sufficient service power and power time for loads during a power-off time. The system is also maintenance-free and is width in operational temperature range and long in service lifetime.

Description

technical field [0001] The invention relates to the field of electric power, in particular to a multi-point energy harvesting system for segmented insulated overhead ground wires of transmission lines based on electromagnetic induction. Background technique [0002] With the continuous improvement of the self-healing ability of the power grid and the optimal allocation of power resources at home and abroad, the concept of a new smart grid has received extensive attention. Smart power grid based on modern transmission and distribution grid. Based on an integrated and high-speed two-way communication network platform, comprehensively apply advanced sensing and measurement, computer, microelectronics, power electronics, control and intelligent decision-making technologies, and use real-time panoramic information of the power grid for real-time monitoring, disaster protection and user Interaction to achieve reliable, safe, economical, high-quality, efficient grid operation and ...

AI Technical Summary

Problems solved by technology

However, the ground current is usually small, and the CT energy extraction power is also small, unless a large CT size is used, but an excessively large size will inevitably bring other risks

For the method of using two overhead ground wires on the line to form a closed loop to obtain the induced current, it is also a relatively good online energy harvesting method, and it is usually easy to meet the energy harvesting power requirements, but this energy harvesting design is currently aimed at a single energy harvesting There is no analysis and discussion on the multi-point energy harvesting system, but for some line segments with harsh environments and requiring key monitoring, multi-point energy harvesting is usually necessary; in addition, the current design is usually based on battery The design combined with the lithium battery, both of which have the defects of poor life and maintenance performance, greatly affect the performance of the energy harvesting device

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