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A three-phase electronic combined transformer

A technology of combining transformers and sensors, which is applied in the directions of instruments, measuring electrical variables, voltage/current isolation, etc., can solve the problems of limited accuracy improvement in measurement and protection, and achieve high measurement accuracy requirements, accurate power grid parameter characteristics, and reduce cost effect

Active Publication Date: 2019-04-16
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing three-phase electronic combined transformers only combine different types of transformers without any improvement. Therefore, the improvement of the accuracy of measurement and protection is limited. At present, the measurement accuracy of electronic transformers is up to 0.1.

Method used

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  • A three-phase electronic combined transformer
  • A three-phase electronic combined transformer
  • A three-phase electronic combined transformer

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Embodiment Construction

[0030] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0031] see figure 1 , is a schematic structural diagram of a three-phase electronic combined transformer provided by an embodiment of the present invention. Since the three-phase electronic combined transformer in the embodiment of the present invention includes A-phase, B-phase and C-phase combined transformers and the A-phase, B-phas...

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Abstract

The embodiment of the invention discloses a three-phase electronic combined mutual inductor. The three-phase electronic combined mutual inductor comprises a combined sensor, a signal processing module, a signal conversion module and a merging unit connected successively. The combined sensor comprises a low power iron core coil, a hollow coil, an optical voltage sensor and an energy-gaining coil. The merging unit is connected with a synchronization pulse generating module. The synchronization pulse generating module is also connected with any one of the combined sensor, the signal processing module and the signal conversion module. According to the embodiment of the invention, the structure of an existing hollow coil is improved, the measuring precision of the three-phase electronic combined mutual inductor is improved, the protecting precision is relatively high, the development tendency that the measuring precision and the protecting precision of the intelligent power grid are improved day by day is met, and the application prospect is wide.

Description

technical field [0001] The invention relates to the technical field of electronic transformers, in particular to a three-phase electronic combined transformer. Background technique [0002] Smart grid has become the focus of attention in the world and is the future development direction of power grid. Smart grid involves all aspects of the power system. In recent years, digital substations have developed rapidly. In digital substations, metering circuits are composed of electronic transformers, optical fiber networks and digital instruments. [0003] An electronic transformer consists of one or more voltage or current sensors connected to a transmission system and a secondary converter to transmit a quantity proportional to the quantity to be measured and supplied to measuring instruments, meters and relay protection or control circuits. In the case of a digital interface, the measurement information is output via the merging unit. Electronic transformer is one of the key ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R15/18
CPCG01R15/181
Inventor 沈鑫曹敏张林山马红升翟少磊周年荣闫永梅黄星李月梅
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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