Energy-gaining device adapted to large-scale current changes

Abstract

The invention belongs to the field of power system detection, and particularly relates to an energy-gaining device adapted to large-scale current changes. The energy-gaining device comprises an instrument transformer sampling module, a relay, a signal shaping module and an embedded processing module, wherein the instrument transformer sampling module converts a heavy current signal in a high voltage line into a low current signal by utilizing an electromagnetic induction principle, and outputs the low current signal; the relay receives the low current signal and outputs the received low current signal; the signal shaping module precisely rectifies the received low current signal, and outputs the rectified low current signal; and the embedded processing module judges and analyses the received low current signal, generates a digital signal and transmits a control signal to the relay. Compared with a conventional energy-gaining transformer, the energy-gaining device adopting structures such as the relay, the embedded processing module and the like overcomes the inherent defect that an energy-gaining current output value changes along with the change of a load and the stability of output current cannot be controlled because the transformation ratio of a coil cannot be changed after the conventional transformer leaves a factory, realizes automatic online detection and automatically controls the stability of the output current of the instrument transformer in real time.

Description

technical field [0001] The invention belongs to the field of power system detection, and in particular relates to an energy harvesting device adaptable to large-scale current changes. Background technique [0002] A current transformer (instrument transformer) is a device that converts current in proportion. Its function is mainly to transform the large current into a standard small current in proportion, so as to realize the current detection of the high-voltage transmission line and supply power to the electrical devices near the high-voltage line. [0003] At present, the existing current transformer is only composed of an induction coil and an iron core, and the transformation ratio of the coil is fixed. Therefore, when the current of the high-voltage power transmission line causes the saturation of the iron core to change, the output current of the transformer will present a complex peak waveform and serious nonlinearity, which will easily lead to failure of some elect...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems in the known technology, the present invention provides an energy harvesting device for adapting to large-scale current changes, aiming to solve the problem that the existing current transformers limit the working current range of the primary side due to the saturation problem

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