Power supply device and power supply method utilizing induced current in overhead ground wire

Abstract

The invention provides a power supply device and power supply method using induced current in overhead ground wire. According to the device and the method, small current transformers and transformersare connected in series and in parallel to form a current source to provide charging current input for an energy storage unit, and whether a current input unit transfers input current in a bypass manner or not is controlled according to a signal of a current control unit, so that output power is adjusted. Compared with a traditional current transformer power supply mode, the power supply device and method adopt a series-parallel connection method of the plurality of small current transformers and transformers, and therefore, it is guaranteed that a power supply has sufficient output power whenthe induced current is small; meanwhile, the modular and miniaturized structure of an energy-taking power supply device is realized by means of the plurality of current transformers and transformers,so that the installation weight and size during field use are reduced, and the field installation and maintenance of a power tower are facilitated.

Description

technical field [0001] The invention relates to the field of power supply for a monitoring device on a tower of a power transmission line, and more particularly, relates to a power supply device and a power supply method using an overhead ground wire induced current. Background technique [0002] In order to speed up the construction of the power Internet of Things and smart grids, it is necessary to deal with the losses caused by natural disasters for transmission lines and towers. A large number of online monitoring equipment has been put into the power system. At present, common energy harvesting methods include: current transformer energy harvesting method based on transmission wire current, photovoltaic panel energy harvesting method, and special low-voltage mains power supply channel method. The energy harvesting power of the photovoltaic panel energy harvesting method is greatly affected by the environment. The current transformer energy harvesting method based on t...

AI Technical Summary

Problems solved by technology

Under the rated current of 5%-120% (the rated current of the transmission line is between 2000A-5000A), the required power can be obtained by using one current transformer, but the current transformer involved in this method is relatively large and the equipment is huge , cannot be applied to the power supply of overhead ground wire induction current

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