Induction type power taking method used for three-core cable

Abstract

The invention relates to an induction type power taking method used for a three-core cable, and belongs to the technical field of an electromagnetic energy harvesting method. According to a technicalscheme, (1) coils c1, c2 and c3 are mounted in three magnetic field extreme point positions of the same cross section of the surface of the three-core cable respectively, wherein the three coils are uniformly wound around two semicircular bracelet ring-shaped frameworks with a mutual difference value angle of 120 degrees in space, and it is ensured that the three coils are aligned to A, B and C phases of core wires of the cable respectively; (2) the voltages generated by induction of the three coils c1, c2 and c3 are subjected to full wave rectification and AC / DC conversion separately to obtain an output voltage; and (3) a direct current voltage output by a full wave rectifying circuit is subjected to filtering by adopting a capacitor, and then the filtered and output DC voltage is supplied to an energy storage module. By virtue of the induction type power taking method, the power supply difficulty of a distributed sensor network in a cable channel can be solved, and a new power supplymethod also can be provided for other similar monitoring or detecting or monitoring apparatus and network, and a high application value is achieved.

Description

technical field [0001] The invention relates to an inductive power-taking method for a three-core cable, and belongs to the technical field of electromagnetic energy collection methods. Background technique [0002] In recent years, grid intelligence has become the trend of power system development. Advanced sensor technology can provide online monitoring information of each node of the power system for the smart grid, which is one of the key technologies of the smart grid. With the development of smart grid, sensor networks (Sensor Networks, SN) are increasingly used in power systems. It installs a large number of sensors at each key node of the power system to realize real-time monitoring of the operating status of the power system. [0003] Cable transmission is generally used in occasions where overhead line transmission is not possible or suitable, such as power supply to the center of a large city. With the continuous improvement of my country's urbanization level, ...

AI Technical Summary

Problems solved by technology

However, the method of taking power from the cable joint can only be used in the case of a single-core cable; for a three-core cable that uses the same shielding layer for the three-phase core wires, since the sum of the three-phase currents is zero during steady-state operation, The traditional way of inductive power collection is not applicable

With battery power supply, regular maintenance and replacement of batteries will become a very difficult problem.

In addition, in a very humid cable channel, the service life of the battery is also limited, and it is easy to cause environmental pollution

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