Differential direct current transformer control method and direct current transformer

A technology of direct current and control method, which is applied in the direction of voltage/current isolation, instrumentation, measuring electricity, etc., can solve problems such as errors, and achieve the effect of improving measurement response and measurement accuracy

Inactive Publication Date: 2017-02-22
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional leakage current transformer uses one-way measurement for the coil waveform. Due to the interference of the environment and equipment, this measurement method has a large error

Method used

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  • Differential direct current transformer control method and direct current transformer
  • Differential direct current transformer control method and direct current transformer
  • Differential direct current transformer control method and direct current transformer

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Embodiment Construction

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0037] The embodiment of the invention discloses a differential DC current transformer control method and the differential DC current transformer to improve the accuracy of leakage measurement.

[0038] At present, the magnetic induction transformer is a common equipment for measuring leakage phenomenon, and its principle is as follows:

[0039] In an ideal state, there is an iron core with a closed geometric shape, here taking a rectangle as an example. N 1 turn ...

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Abstract

An embodiment of the invention discloses a differential direct current transformer control method and a differential direct current transformer. The differential direct current transformer is configured with a four-channel analog switch. The method comprises the following steps of outputting a square wave and carrying out level conversion; using the square wave after the level conversion to drive the four-channel analog switch; acquiring a coupling waveform of a detection coil where an excitation current is input; and according to a preset testing index, testing a direct current lead to be tested and acquiring a testing result. By using the differential direct current transformer control method and the differential direct current transformer in the embodiment of the invention, compared to a traditional magnetic modulation transformer, on an aspect of waveform transformation, the waveform transformation adopted by the traditional magnetic modulation transformer is in a single increase or single decrease mode, but the waveform transformation of the differential magnetic induction transformer is increased and is also decreased so that measure response and measure precision during a low current are well increased.

Description

technical field [0001] The present invention relates to the technical field of wind speed forecasting in wind farms, and more specifically, to a differential DC current transformer control method and a differential DC current transformer based on combined forecasting theory. Background technique [0002] The safe and reliable operation of the power system is of great significance. Among them, accurate measurement of leakage current is an important link. The traditional leakage current transformer uses one-way measurement for the coil waveform, and there are large errors in this measurement method due to the interference of the environment and equipment. Contents of the invention [0003] In view of this, the present invention provides a differential DC current transformer control method and a differential DC current transformer to improve the accuracy of leakage measurement. [0004] The present invention discloses: [0005] A differential DC current transformer control...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R15/18G01R31/02
CPCG01R15/18G01R31/50
Inventor 胡正伟谢志远李来杰王力崇裴兆鹏
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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