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Transformer on-line monitoring sensor

A technology of sensors and transformers, applied in the field of online monitoring of power equipment, to achieve the effect of improving efficiency

Inactive Publication Date: 2014-02-12
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a transformer on-line monitoring sensor, which is used to solve the problems existing in the existing transformer on-line monitoring system.

Method used

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  • Transformer on-line monitoring sensor

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Embodiment Construction

[0038] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0039] figure 1 It is the structural diagram of the transformer on-line monitoring sensor provided by the present invention. like figure 1 As shown, the transformer on-line monitoring sensor provided by the present invention includes a Rogowski coil current measurement module, a zero magnetic flux compensation module and a signal processing module. Wherein, the Rogowski coil current measurement module includes a ring core 1 , a secondary coil 2 wound on the ring core and a measuring resistor 3 . The zero-flux compensation module includes a compensation coil 4 wound on an annular iron core, a flux measurement sensor 5 and a compensation circuit 6 . The transformer online monitoring sensor is installed on the lead-ou...

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Abstract

The invention relates to the technical field of electrical equipment on-line monitoring, and discloses a transformer on-line monitoring sensor. The transformer on-line monitoring sensor comprises an annular core, a secondary side coil, a measuring resistor, a compensating coil, a magnetic-flux measurement sensor, a compensating circuit and a signal processing module, wherein a transformer bushing end screen outgoing line perpendicularly penetrates through the center of the annular core, the annular core is provided with a groove used for containing the magnetic-flux measurement sensor, the input end of the secondary side coil is connected with the output end of the compensating coil, the measuring resistor is arranged between the output end of the secondary side coil and the ground in a parallel connection mode, the magnetic-flux measurement sensor is placed into the groove, and is connected with the compensating circuit, the compensating circuit is connected with the input end of the compensating coil, and the signal processing module is arranged between the two ends of the measuring resistor in a parallel connection mode. The transformer on-line monitoring sensor can obtain accurate fault signals through measurement, and carry out on-line monitoring on various fault signals at the same time; due to the fact that primary wiring does not need to be modified, and safety and reliability of on-line monitoring and efficiency of equipment installation and maintenance are improved.

Description

technical field [0001] The invention belongs to the technical field of on-line monitoring of electric power equipment, and in particular relates to an on-line monitoring sensor of a transformer. Background technique [0002] With the development of social economy, electric energy, as the main energy source in modern society, is more and more closely related to people's life and production and construction. With the rapid development of EHV and UHV power transmission and transformation technologies, the capacity and quantity of power equipment have increased significantly, and the scale of power grids has gradually expanded. The operation of the modern power system must not only ensure the quality of qualified power supply, but also ensure the stable and reliable power generation and power supply capacity. The power transformer is one of the most important equipment in the power system, and it is particularly important to improve the operation reliability of the power transf...

Claims

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Application Information

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IPC IPC(8): G01R31/00
Inventor 王永强詹宁宁律方成毕建刚邓彦国
Owner STATE GRID CORP OF CHINA
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