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Combination transformers for power systems

A technology combining transformers and power systems, applied in inductors, circuits, voltage dividers, etc., can solve problems such as inability to plug and play, complex secondary signal processing circuits, and inability to meet billing needs.

Active Publication Date: 2016-08-17
传奇电气(沈阳)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the processing circuit of the secondary signal is complicated, and the output signal is accompanied by white noise. When there is no primary current, due to the interference of white noise, the combined transformer will also output the secondary signal, which cannot meet the needs of billing.
If the voltage measurement adopts the technology of combining the capacitive voltage divider and the Pockels effect, the measurement error of the voltage part must also be calibrated on site, and it cannot be plug-and-play

Method used

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  • Combination transformers for power systems
  • Combination transformers for power systems
  • Combination transformers for power systems

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Embodiment Construction

[0055] In order to have a clearer understanding of the technical features, purposes and effects of the invention, the specific embodiments of the present invention are now described with reference to the accompanying drawings, in which the same reference numerals represent parts that are identical or similar in structure but identical in function.

[0056] In order to make the drawing concise, each drawing only schematically shows the parts related to the present invention, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, only one of the components having the same structure or function is schematically shown, or only one of them is marked.

[0057] Herein, "a" not only means "only one", but also means "more than one". In this article, the "parallel" between two objects does not mean absolute parallelism in the geometric sense, but may include deviations allowed during assembly and...

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Abstract

The invention provides a combined transformer for a power system. The combined transformer comprises a casing (10), a base (2) and an insulator (30). A current transformer (12) is arranged in the casing and can detect the current in a primary conductor (40) in the power system. A voltage transformer (32) is arranged in the insulator and comprises a resistance voltage division circuit (34), a capacitor voltage division circuit (36), a secondary voltage division resistor (37) and an output branch circuit (38), wherein one end of the resistance voltage division circuit is electrically connected with the primary conductor, and the other end is electrically connected with a secondary voltage division potential point of the capacitor voltage division circuit; and the capacitor voltage division circuit is realized by multiple layers of capacitive screens. The combined transformer for the power system, provided by the invention, can be used without error calibration after site installation, and can realize instant use after being plugged..

Description

technical field [0001] The invention relates to a combined transformer used in a power system, in particular to an independent electronic combined transformer. Background technique [0002] In the power system, transformers need to be used to measure high-voltage, high-current and high-voltage, so as to realize the protection, control and power metering of the power system. In this process, it is also necessary to electrically isolate the primary high voltage and the secondary low voltage. Combined transformer is a device that has both current and voltage measurement functions and can electrically isolate the primary high voltage and secondary low voltage at the same time. [0003] In the traditional combined transformer, the measurement of current and voltage adopts the electromagnetic transformer technology with iron core based on Faraday's electromagnetic induction principle. At present, this combined transformer is widely used in power systems all over the world. Sinc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F38/34G01R15/06H01F38/36
Inventor 林芳敏
Owner 传奇电气(沈阳)有限公司
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