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Device and method for obtaining electric energy through current transformer made of composite magnetic core materials

A current transformer and magnetic core material technology, which is applied in the direction of inductors, circuit devices, transformer/inductor cores, etc., can solve the problems of complex voltage stabilization control methods and out-of-control problems, and achieve good load characteristics, simple peripheral circuits, and The effect of broad market prospects

Inactive Publication Date: 2014-06-04
ZHEJIANG TUWEI ELECTRICITY TECH
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Problems solved by technology

However, the voltage stabilization control method of this method is relatively complicated under the condition of large current, and it is easy to cause runaway phenomenon.

Method used

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  • Device and method for obtaining electric energy through current transformer made of composite magnetic core materials
  • Device and method for obtaining electric energy through current transformer made of composite magnetic core materials
  • Device and method for obtaining electric energy through current transformer made of composite magnetic core materials

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Embodiment Construction

[0029] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The following description is only for demonstration and explanation, and does not limit the present invention in any form.

[0030] like image 3 As shown, the current transformer using composite magnetic core material is used to obtain electric energy, including current transformer 1, resonant capacitor C r , rectifier filter unit 2, load R L , a current transformer is used to pick up the induced current on the cable passing through its magnetic core. The current transformer (1) adopts composite magnetic core material, and the excitation inductance value of the secondary side of the current transformer 1 is L m with C r Satisfy the resonance condition, that is, ,That f is the primary current frequency of the transformer.

[0031] like Figure 4As shown, the composite magnetic core material adopted by the current transformer (1) include...

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Abstract

The invention discloses a device and method for obtaining the electric energy through a current transformer made of composite magnetic core materials. The device for obtaining the electric energy comprises the designed current transformer and an electric power obtaining circuit of the current transformer, wherein the device for obtaining the electric energy has good characteristics when a high-voltage or middle-voltage or low-voltage cable is in a small-current state and in a large-current state. When the current of an electric transmission line is small, an exciting electrical inductor of the current transformer is in resonance with an externally-arranged capacitor and the output power is improved; when the current of the electric transmission line is large, a small part of magnetic core materials of the current transformer are in a magnetism saturation condition, the function of voltage stabilization output is achieved, the overall loss of the device is prohibited, and heat-emission of a transformer body is greatly reduced. A periphery circuit of the device for obtaining the electric energy is quite simple, the electric supply stability is high, and the wide application value and the wide market prospect are achieved.

Description

technical field [0001] The invention belongs to the field of electric technology, and uses a current transformer with a composite magnetic core material, a device and a circuit for obtaining electric energy through transmission line induction, and is particularly suitable for supplying power to high-voltage transmission line monitoring equipment. Background technique [0002] High-voltage cables are the main components of my country's power grid, and online monitoring of their operating conditions has become an important link to improve the reliability of the power grid. However, it is very inconvenient to supply power to these monitoring equipment placed around the transmission line, such as in the field or underground. It cannot provide 220V AC mains power, and the stability and maintenance-free of photovoltaic panels or batteries are poor. Only the use of current transformers to directly obtain power from high-voltage transmission lines through electromagnetic induction is...

Claims

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Application Information

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IPC IPC(8): H02J17/00H01F38/30H01F27/24H02J50/12
Inventor 黄武浩胡伟余立刚骆定华
Owner ZHEJIANG TUWEI ELECTRICITY TECH
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