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Wide-range adaptive CT (Current Transformer) energy harvesting method using regulated-flux and enhanced-permeability iron core

A wide-ranging, electrical-method technology, applied in the direction of electrical components, output power conversion devices, conversion equipment that can be converted to DC without intermediate conversion, etc., can solve the problem of iron core vibration and heat, unable to limit excess energy, and insufficient energy Energy and other issues, to achieve the effect of simple manufacturing method, avoid complex post-stage circuit design, and improve stability

Active Publication Date: 2014-04-02
卢庆港
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  • Abstract
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  • Application Information

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Problems solved by technology

[0013] 2. The wide-range self-adaptive CT power-taking method according to claim 1, which regulates the magnetic flux of the iron core and strengthens the magnetic conduction. Vibration heating problem when saturated, using two cores with different magnetic permeability, the high permeability core achieves reliable start under low current, and the low permeability core works in an unsaturated state

Method used

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  • Wide-range adaptive CT (Current Transformer) energy harvesting method using regulated-flux and enhanced-permeability iron core
  • Wide-range adaptive CT (Current Transformer) energy harvesting method using regulated-flux and enhanced-permeability iron core
  • Wide-range adaptive CT (Current Transformer) energy harvesting method using regulated-flux and enhanced-permeability iron core

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Embodiment Construction

[0028] The invention consists of figure 1 Two cores A (102) and B (106) with different magnetic permeability shown, a primary loop conductor (104), an energy-taking coil (105), an adjusting coil (103), variable impedance Zc (101) and a rectification output control circuit (107), through the unique co-winding process of double cores and double coils, the synthesis and control of magnetic flux in two independent magnetic circuits is realized.

[0029] For a line whose load current varies in a wide range, first select the magnetic permeability, magnetic circuit length and cross-sectional area of ​​the two cores according to the maximum load current and electric power design. Scope design CT secondary winding coil turns and specific series of variable impedance Zc. The regulating CT composed of the regulating core A (102) and the regulating coil (103) can refer to the CT manufacturing process used in the power system, such as TPY and TPZ, which meet the requirements of transient...

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Abstract

The invention discloses a wide-range adaptive CT (Current Transformer) energy harvesting method using regulated-flux and enhanced-permeability iron cores. Through a unique co-winding technology of dual iron cores and dual coils, the synthesis and control of flux in two independent magnetic paths are realized, stable energy harvesting induced voltage output is realized by regulating the flux in an energy harvesting coil, low-current starting is realized by using enhanced-permeability iron cores, the external load impedance of a regulating coil is automatically changed according to the induced voltage of the energy harvesting coil to realize the internal flux regulation of the energy harvesting coil and the primary current which changes in a wide range is automatically adapted; the stable output of the voltage of the energy harvesting coil when the current changes in the wide range is realized, the complex post-stage circuit design caused by excessive energy harvesting is avoided, the operation stability and reliability of equipment are improved, the method not only can be applied to energy harvesting products with higher power, but also can be applied to products such as CTs with low or micro power, and a new solution is provided for engineering application in which power is inconvenient to directly supply.

Description

technical field [0001] The invention belongs to the technical field of electric power systems, and in particular relates to a CT power acquisition method for realizing wide-range self-adaptive online energy acquisition on a high-voltage side. Background technique [0002] With the development and application of smart grid and online monitoring technology, a large number of monitoring equipment are directly installed on the high-voltage side, and it is impossible to directly supply power to them from the ground side. At present, the main energy supply methods include voltage-dividing capacitor power supply, laser power supply and CT power supply, etc. Various methods, among which CT power supply has been continuously improved and perfected in recent years, has a variety of implementation schemes and has been gradually applied to practical projects. Considering the stability of long-term work under high current, the relevant information of the existing literature is as follows...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P13/00
Inventor 卢庆港
Owner 卢庆港
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