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Generator stator winding polarization depolarization test system and test method

A generator stator and test system technology, which is applied in the direction of motor generator testing, dielectric strength testing, and electrical measurement, can solve problems such as inconvenient operation and efficiency, and achieve the effect of improving work efficiency and saving test time

Inactive Publication Date: 2019-10-22
SOUTHERN POWER GRID PEAK LOAD & FREQUENCY REGULATION GENERATING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the technical problems of inconvenient operation and high efficiency existing in the existing polarization and depolarization current method, the embodiment of the present invention provides a polarization and depolarization test system and test method for stator windings of generators

Method used

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  • Generator stator winding polarization depolarization test system and test method
  • Generator stator winding polarization depolarization test system and test method
  • Generator stator winding polarization depolarization test system and test method

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Embodiment

[0037] In this embodiment, the picoammeter is a KEITHLEY 6487 picoammeter, which includes a ±500V DC voltage source, and has functions such as current measurement and ohm measurement with variable voltage polarity. The microcurrent measurement range is 2nA ~20mA, the test accuracy can reach 1pA, and can be programmed through the interface bus RS232 and IEEE488. The generator stator winding polarization and depolarization test system provided in this embodiment mainly collects the polarization and depolarization current signals through the KEITHLEY 6487 picoammeter, and the collected signals are processed in the picoammeter and then transmitted to the data acquisition card. Then it is transmitted to the computer installed in the system, that is to say, the test parameters collected by the picoammeter will be transmitted to the system in real time and processed by the system; among them, the data acquisition card adopts NI’s GPIB-USB -HS+, product number 783368-01, uses the stan...

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Abstract

The invention discloses a generator stator winding polarization depolarization test system and a test method. The system is used for receiving a polarization depolarization current signal collected bya picoammeter and processing the polarization depolarization current signal. The system comprises an operation interface and a display interface. The operation interface comprises a data saving setting module and a test parameter setting module. The data saving setting module is used to automatically create a document for collection time and corresponding current value data after the start of thetest according to a user-specified document name and save the document in a specified folder. The test parameter setting module is used to provide a user with selection or setting of test parameters.The display interface comprises time display, real-time current display and polarization depolarization characteristic curve display. The system realizes automatic control, data processing and complete preservation of test data and curves of the polarization depolarization test through accurate delivery of test control parameters, which saves the test time and improves the working efficiency of the test personnel.

Description

technical field [0001] The invention relates to the field of polarization and depolarization testing, in particular to a polarization and depolarization testing system and a testing method for stator windings of a generator. Background technique [0002] Polarization-depolarization current method (PDC), as a non-destructive insulation diagnosis technology based on time-domain dielectric response theory, has the characteristics of rich information and easy operation. During the field test of the polarization and depolarization of the generator stator winding, it is necessary to manually operate the KEITHLEY 6487 picoammeter to conduct the polarization and depolarization test of the generator stator winding, and the degree of automation is low. In the process of actual measurement and application, it is necessary to collect the current measurement data of the KEITHLEY 6487 picoammeter in real time by taking pictures with the mobile phone. Taking pictures with the mobile phone ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00G01R13/00G01R31/12G01R31/34
CPCG01R13/00G01R19/0092G01R31/1227G01R31/343G01R31/346
Inventor 刘向东聂靓靓陈绪滨凌鹏肖发福蒋军黄明浩黄文汉赵贵文陶诗迪冯时罗智丹
Owner SOUTHERN POWER GRID PEAK LOAD & FREQUENCY REGULATION GENERATING CO LTD
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