Integral check system of FRA-type winding deformation tester
A winding deformation and tester technology, applied in instruments, measuring devices, measuring electrical variables, etc., to achieve the effect of improving efficiency
Active Publication Date: 2011-07-20
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +1
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Problems solved by technology
[0007] The technical problem to be solved by the present invention is to provide a winding deformation test with good pertinence, high accuracy and good flexibility in view of the deficiencies of the traditional method when performing calibration work on the FRA type winding deformation tester. Instrument overall calibration system
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Embodiment Construction
[0024] The present invention will be further described below with reference to the drawings and embodiments.
[0025] figure 1 It is a wiring diagram for the acceptance of the winding deformation tester using the traditional "material method". Use the physical winding or physical inductance L to perform the acceptance work on the tested FRA winding deformation tester; among them, the FRA winding deformation tester generates a frequency sweep signal Vs, which is applied to one end of L through a matching resistor Rs, and the applied voltage is V1, The winding deformation tester also samples and stores the output voltage V2 of L. In this way, the winding deformation tester will obtain the amplitude-frequency characteristics of the two-port network with L as the main device. This traditional "material method" has limited stability, accuracy, and single value. It is difficult to perform effective and convenient verification of the FRA winding deformation tester.
[0026] figure 2 It ...
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The invention discloses an integral check system of an FRA-type winding deformation tester, comprising an upper computer and a lower computer. The upper computer comprises a user interface, the lower computer comprises a control module, a pure-resistance decay switching module and a resistance-capacitance decay switching module, wherein the user interface is connected with the control module in the lower computer and comprises a parameter input module; an output control signal of the control module is respectively connected with the pure-resistance decay switching module and the resistance-capacitance decay switching module; the input ends of the pure-resistance decay switching module and the resistance-capacitance decay switching module are connected with the signal excitation end and the initial test end of the winding deformation tester to be tested, and the output ends are connected with the tail test end of the winding deformation tester to be tested; and the lower computer comprises an automatic switching circuit. The invention can carry out high-efficiency and high-precision check on the main measurement function of the winding deformation tester, namely the amplitude-frequency characteristic measurement function of a transformer winding.
Description
Technical field [0001] The invention relates to an integral verification system for a winding deformation tester, which belongs to the field of calibration, verification and detection of high-voltage metering power test instruments. Using this overall calibration system, the main measurement functions of the FRA winding deformation tester, namely: the measurement function of the transformer winding amplitude-frequency characteristics, can be verified with high efficiency and high accuracy. Background technique [0002] The power transformer is the primary equipment of the power system, and its safe operation is essential. When a power transformer is subjected to mechanical and electrodynamic forces, such as a short-circuit current impact or a collision during transportation, the transformer windings will have axial or radial dimensional changes, which may cause winding deformation, which will directly affect the power transformer’s performance. safe operation. There are many me...
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IPC IPC(8): G01R35/00
Inventor 杨志新包玉树张军朱月熠丁伟
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST