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Digital integration method for electronic transformer and digital integrator

A technology of electronic transformer and digital integrator, applied in inductors, circuits, transformers, etc., can solve the problems of poor applicability of digital integrator, and achieve the effect of accurate results and not easy to saturate

Active Publication Date: 2016-09-21
XUJI GRP +3
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention provides a digital integration method and a digital integrator of an electronic transformer, which are used to solve the problem of poor applicability of the digital integrator

Method used

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  • Digital integration method for electronic transformer and digital integrator
  • Digital integration method for electronic transformer and digital integrator
  • Digital integration method for electronic transformer and digital integrator

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Embodiment Construction

[0023] The electronic transformer digital integration method provided by the present invention, the analog differential and integral prototype of the electronic transformer is as follows figure 1 As shown, the front part of the dotted line is the differential model of the electronic transformer, and the rear end of the dotted line is the model of the analog integral. Here, the differential model of the electronic transformer uses a Rogowski coil.

[0024] figure 1 Among them, the differential circuit of the electronic transformer includes the inductance L of the coil, the stray capacitance C and the load resistance R, and the transfer function of the continuous domain of the integral loop is:

[0025] H ( s ) = - R f R 1 1 + R f ...

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Abstract

The invention relates to a digital integration method for an electronic transformer and a digital integrator. A system transfer function is y(n)=A*[a*[x(n-2)-x(n)]+x(n-1)+x(n)]-B*y(n-1). A bilinear algorithm is adopted by the digital integration method of the electronic transformer and the digital integrator provided by the invention, so that saturation is not easily achieved. The values of parameters A and B are determined by the value of an actual electronic transformer component, so that the digital integration method and the digital integrator are suitable for various electronic transformers. Furthermore, the transfer function is also set with a for phase compensation, so that integral operation can be carried out, phase compensation can also be carried out and the obtained result is more accurate.

Description

technical field [0001] The invention belongs to the field of data collection and processing of electronic transformers, and in particular relates to a digital integration method for electronic transformers, that is, the design of a digital integrator. Background technique [0002] With the gradual increase of power system capacity and voltage level, the traditional electromagnetic current transformer has a large volume, heavy weight and narrow dynamic range. It is easy to produce ferromagnetic resonance, and the output is analog, which cannot meet the requirements of the current smart grid. Electronic transformers have good insulation, strong anti-interference ability, no ferroresonance and magnetic saturation, and large dynamic range. They adapt to the development of smart grids and are widely used in digital substations. [0003] The output of the current transformer based on the principle of Rogowski coil and the voltage transformer based on the principle of resistance-c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F38/32
CPCH01F38/32
Inventor 牟涛杨智德赵应兵朱建斌白申义李刚刘晓霞樊占峰李贞
Owner XUJI GRP