Test device and method for detecting winding deformation of power transformer

A technology for power transformers and testing devices, which is applied in the direction of measuring devices, measuring electrical variables, and measuring electricity, can solve problems such as time-consuming, labor-intensive, and inconvenient, and achieve the effects of improving sensitivity, expanding the sensitive range, and improving efficiency

Active Publication Date: 2009-01-14
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

In order to detect the deformation of the power transformer winding, it is generally necessary to conduct two tests of the reactance method and the frequency response method. However, due to the different test equipment and wiring methods used in the two test methods, it is necessary to re-wire when using different test methods, which is extremely consuming. Time-consuming and labor-intensive, which brings great inconvenience to the on-site testing work

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  • Test device and method for detecting winding deformation of power transformer
  • Test device and method for detecting winding deformation of power transformer

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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] like figure 1 As shown, the test device provided by the present invention includes a DDS sweep signal generator unit 10, a broadband power amplifier unit 20, a test unit 30, a power supply system 50 for supplying power to each unit, and a host computer.

[0018] like figure 1 As shown, the DDS frequency sweep signal generator unit 10 of the present invention includes a D / A waveform generation module 11 and a waveform processing module 12, and the D / A waveform generation module 11 generates the frequency sweep signal required for testing by instruction, the frequency sweep After the signal is processed by the waveform processing module 12 , the waveform of the sweeping signal is amplified and the interference signal is removed, and then sent to the broadband power amplifier unit 20 .

[0019] like figure 1 , figure 2 As shown, the broadband...

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Abstract

The invention relates to a test apparatus and a test method used for testing the distortion of a coil of a power transformer. The apparatus comprises an upper computer, a test unit, a DDS sweeping signal generator unit, a wide-frequency power amplifier unit and a power supply system. The test unit comprises a CPU, a data collecting unit, a logic control module and a communication unit; the CPU communicates with the upper computer through the communication unit and sends work instructions to the logic control module according to the instructions of the upper computer and simultaneously sends an instruction to the DDS sweeping signal generator unit to lead the unit to generate a corresponding sweeping signal; the sweeping signal generated by the DDS sweeping signal generator unit is transmitted to a coil on one side of the tested power transformer; the data collecting unit is respectively connected with two ends of the coil of the power transformer to collect data for regulation and convert the data into digital signals which are transmitted to the CPU for computation and then the computation result is transmitted to the upper computer through the communication unit; the logic control module is simultaneously connected with the CPU and the data collecting unit to control the data collection and transmission.

Description

technical field [0001] The invention relates to a test device and a test method of a power system, in particular to a test device and a test method for detecting deformation of a power transformer winding. Background technique [0002] During the operation and transportation of power transformers, the windings may be subjected to mechanical force or electric force, resulting in local distortion, swelling or displacement of the windings, which will directly cause sudden accidents in severe cases. After the local deformation of the winding, even if it is not damaged immediately, it may leave a serious potential failure. Therefore, it has become an important transformer state diagnosis item to carry out deformation test on transformer winding and judge the state of winding. [0003] At present, the following two methods are used to diagnose winding deformation: one is the frequency response analysis method (referred to as the frequency response method); the other is the reacta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/06
Inventor 鞠登峰姚文军毕建刚王军王献丽刘巍张国亮邓彦国张金祥刘娟孟庆大许渊毛婷
Owner CHINA ELECTRIC POWER RES INST
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