Current conversion transformer induction pressure test supply apparatus and method for measurement of partial discharge thereof

A converter transformer and withstand voltage test technology, which is applied to the parts of electrical measuring instruments, measuring electricity, measuring devices, etc., can solve the problems of not setting test bushings and lower voltage windings, etc.

Inactive Publication Date: 2008-06-18
湖北省电力试验研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing converter transformers are not equipped with test bushings and lower voltage windings in structural design, and low-voltage excitation cannot be used to measure induced withstand voltage and partial discharge on site.

Method used

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  • Current conversion transformer induction pressure test supply apparatus and method for measurement of partial discharge thereof

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Experimental program
Comparison scheme
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Embodiment Construction

[0042] Further illustrate below in conjunction with accompanying drawing and embodiment:

[0043] 1. This device

[0044] As shown in Figure 1, the device includes a converter transformer (7), is provided with an asynchronous motor (1), a brushless intermediate frequency synchronous generator (2), an intermediate transformer (3), a capacitive voltage divider (4), a voltmeter (5 ), detection impedance (6), partial discharge tester (8), compensation reactor (9).

[0045] 2. The components of the device

[0046] 1. Asynchronous motor (1)

[0047] The asynchronous motor (1) consists of two parts, the main motor (1.1) and the auxiliary motor (1.2). The auxiliary motor (1.2) is used as a starter motor to drive the main motor (1.1) to synchronize with the generator (2) and quit running, and then the main motor (1.2) The motor (1.1) drives the generator (2) to run, as shown in Figure 2.

[0048] *The parameters of the main motor (1.1) are as follows:

[0049] Model: JS2400M2-4

...

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Abstract

The invention discloses a power supply device of the induction withstanding voltage test on the converter transformer and a measurement method of partial discharges thereof, and relates to a in-site test technology of the converter transformer. The structure of the device is that an asynchronous motor (1), a brushless medium-frequency synchronous generator (2), an intermediate transformer (3) and a converter transformer (7) are connected successively for providing the test power supply of the converter transformer (7). The converter transformer (7), detecting impedance (6) and a partial discharge test device (8) are connected successively for detecting the partial discharge amount of the converter transformer (7). The intermediate transformer (3), a capacitive voltage divider (4) and a voltmeter (5) are connected successively for measuring the test voltage of the intermediate transformer (3). A compensation reactor (9) is connected to the converter transformer (7) for compensating the reactive current of the converter transformer (7). The invention is suitable for the induction withstanding voltage test of all converter transformers and measurement of the partial discharges thereof.

Description

technical field [0001] The invention relates to a field test technology of a converter transformer, in particular to a power supply device for a converter transformer induction withstand voltage test and a partial discharge measurement method thereof. Background technique [0002] In recent years, the application of partial discharge measurement technology in power transformers has led to a significant improvement in the design and manufacturing quality of transformers. According to national standards, partial discharge test is an essential routine test item for power transformers with voltage levels of 220kV and above. Practice has proved that many defective transformers can be found in the partial discharge test and dealt with before leaving the factory, thus eliminating hidden dangers and reducing operational accidents. According to the provisions of the national standard GB50150-2006 "Electrical Equipment Handover Test Standards for Electrical Installation Engineering",...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R1/28G01R31/00G01R31/12G01R31/14
Inventor 付军胡惠然金涛罗维黄友生魏光华吴云飞江定水
Owner 湖北省电力试验研究院
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