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Partial discharge on-line monitoring device for power electronic valve body

A technology of partial discharge and power electronics, applied in the direction of testing dielectric strength, etc., can solve problems such as single means, no economic advantages, high cost of ultraviolet imagers, etc., achieve good application prospects, take into account economy and practicability, and resist good interference effect

Inactive Publication Date: 2012-07-11
CHINA EPRI SCIENCE & TECHNOLOGY CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, this detection method has a single means and is easy to operate.
In addition to the above advantages, the cost of ultraviolet imagers is very high, and there is no economic advantage

Method used

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  • Partial discharge on-line monitoring device for power electronic valve body
  • Partial discharge on-line monitoring device for power electronic valve body
  • Partial discharge on-line monitoring device for power electronic valve body

Examples

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Embodiment Construction

[0037]The present invention will be further described below in conjunction with accompanying drawing.

[0038] Such as figure 1 , a partial discharge on-line monitoring device for a power electronic valve body, the device includes a power generation module 1, a photoelectric sensor module 2, an analog signal conditioning module 3, a digital signal processing module 4, a communication module 6, and a discharge information storage module 7 and host computer 8; the photoelectric sensor module 2 converts the optical signal generated by the partial discharge on the surface of the power electronic valve body into an electrical signal, and sequentially amplifies, filters and modifies the electrical signal through the analog signal conditioning module 3 Conversion: the converted digital signal is passed to the host computer 8 via the communication module 6 for online monitoring through the digital signal processing module 4 after the operation and analysis, and stored in the discharge...

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Abstract

The invention provides a partial discharge on-line monitoring device for a power electronic valve body, belonging to the technical field of power electronics. A photoelectric sensor module (2) converts an optical signal generated by partial discharge of the surface of the power electronic valve body into an electrical signal, and an analog signal conditioning module (3) is used for carrying out amplification, filtering and analog-to-digital conversion to the electrical signal sequentially; a digital signal processing module (4) carries out operational analysis on a converted digital signal to obtain information, and the information is transferred to a supervisory computer (8) by a communication module (6) to perform on-line monitoring and is stored in a discharge information storage module (7); and a power generating module (1) supplies power for all the other modules. The partial discharge on-line monitoring device has a small volume, uses reduced number of parts, and is low in cost, good in real-time property, strong in flexibility of the installation position, high in precision of the discharge detection which can reach 50pC, easy to move and install; good in anti-interference capability and high in sensitivity and working reliability. The device in the invention integrates both economical efficiency and practicability and has good application prospect.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to an on-line partial discharge monitoring device for a power electronics valve body. Background technique [0002] With the improvement of the voltage level of power equipment and the wide application of various organic insulating materials, the partial discharge problem of power electronic valve body is becoming more and more prominent. In particular, complex structure power electronic valve bodies and special applications put forward higher requirements for equipment insulation structure and operation reliability. Some weak insulation parts in the power electronic valve body are prone to partial discharge under the continuous action of strong electric field, which will cause insulation failure and equipment damage. Partial discharge phenomenon contains rich characteristic information, which can be used to detect the insulation performance of high-voltage eq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
Inventor 王轩渠学景赵士硕武丹王柯韩天绪王学军何维国邹俭
Owner CHINA EPRI SCIENCE & TECHNOLOGY CO LTD
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