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Passive electronic voltage transformer

A technology of voltage transformer and current transformer, applied in the field of passive electronic voltage transformer, achieves the effects of wide frequency response range, high measurement accuracy and strong anti-electromagnetic interference ability

Inactive Publication Date: 2016-04-27
BEIJING AUTOMATION CONTROL EQUIP INST
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a new type of passive electronic voltage transformer, which can effectively overcome the defects of existing electronic voltage transformers. The high-voltage side does not need power supply, there is no magnetic saturation problem, and it has low cost, high response Fast speed, good measurement linearity, wide measurement dynamic range, high measurement accuracy, good transient performance, high reliability and good stability, etc.

Method used

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Embodiment Construction

[0027] The passive electronic voltage transformer of the present invention uses an all-optical current transformer to measure the leakage current of a capacitive voltage divider between high and low voltages to indirectly perform voltage detection. The embodiments of the present invention will be further described below in conjunction with the drawings.

[0028] Such as figure 1 As shown, a passive electronic voltage transformer of the present invention includes a capacitive voltage divider 3, an all-fiber current transformer 11, and a data processing unit 16; the leakage of the capacitor voltage divider 3 is measured by using an all-fiber current transformer 11 Current indirectly detects voltage;

[0029] 1. Capacitor voltage divider 3 includes high voltage terminal 1, upper cover 2, metal expander 4, insulating umbrella skirt 5, insulating sleeve 6, high voltage capacitor 7, low voltage capacitor 8, insulating medium 9, first signal output terminal 10. Ground terminal 17, bottom...

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Abstract

The invention relates to a passive electronic voltage transformer, and belongs to the technical field of electronic voltage transformers. The passive electronic voltage transformer comprises a capacitive voltage divider, an all-fiber current transformer and a data processing unit, and the all-fiber current transformer is used to the leakage current of the capacitive voltage divider and indirectly detect the voltage. The passive electronic voltage transformer can effectively overcome defects of a present electronic voltage transformer, power supply is not needed in the high-tension side, the problem of magnetic saturation does not exist, and the passive electronic voltage transformer also has the advantages including low cost, high response speed, high measuring linearity, wide measuring dynamic range, high measuring precision, high transient performance, high reliability and high stability.

Description

Technical field [0001] The invention belongs to the technical field of electronic voltage transformers, and specifically relates to a passive electronic voltage transformer. Background technique [0002] With the introduction of the country's strong smart grid, smart substations have officially entered the power system to provide services for the power industry. Among them, the voltage transformer is one of the basic measurement equipment for electric energy measurement and relay protection in the power system. Its accuracy and reliability are closely related to the safe, reliable and economic operation of the power system. With the development of high-voltage and large-capacity power transmission and distribution networks, the automation and intelligence requirements of power systems in monitoring, control, and protection continue to increase. Electronic voltage transformers have effectively overcome the traditional electromagnetic voltage transformers. Disadvantages, it has th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R15/18
Inventor 章敏吴衍记许刚向强杨怿段俊杰
Owner BEIJING AUTOMATION CONTROL EQUIP INST
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