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Rapid switching verification device and method for power transformer primary winding

A power transformer, fast switching technology, applied in the direction of measuring devices, electrical measuring instrument parts, instruments, etc., can solve the problems of heavy workload and low work efficiency of power transformer verification, and achieve the solution of heavy workload and fast Switch the verification circuit and detect the effect of convenience

Pending Publication Date: 2020-05-15
MEASUREMENT CENT OF GUANGDONG POWER GRID CO LTD
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  • Application Information

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Problems solved by technology

[0005] The embodiment of the present invention provides a power transformer primary winding rapid switching verification device and method, which are used to solve the technical problems of low work efficiency and heavy workload in the existing verification of power transformers

Method used

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  • Rapid switching verification device and method for power transformer primary winding
  • Rapid switching verification device and method for power transformer primary winding
  • Rapid switching verification device and method for power transformer primary winding

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Embodiment 2

[0070] image 3 It is a flow chart of the steps of the verification method for fast switching of the primary winding of the power transformer described in the embodiment of the present invention.

[0071] Such as figure 2 with image 3 As shown, the embodiment of the present invention provides a fast switching verification method for the primary winding of a power transformer, which is used for the above-mentioned fast switching verification device for the primary winding of the power transformer, including the following steps:

[0072] Step 100. Connect the high-current current booster T1, the standard current transformer CTo, the tested current transformer CTx, the current load box Z, the transformer calibrator HE and at least 5 circuit breakers DLQ through the high-voltage cable according to the above-mentioned The power transformer primary winding fast switching calibration device connection;

[0073] Step 200. When a current ratio of the tested current transformer CTx...

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Abstract

The embodiment of the invention relates to a rapid switching verification device and method for power transformer primary winding. The device comprises a large current booster, a standard current transformer, a detected current transformer, a current load box, a transformer calibrator and at least five circuit breakers. According to the verification device, the primary winding input connection endof a calibrated current transformer is respectively connected with different wiring connection ends of the large current booster and the standard current transformer through a plurality of circuit breakers according to the rated current ratio of the calibrated current transformer, detection loops with different current ratios are formed among the calibrated current transformer, the current booster and the standard current transformer by controlling on and off of the circuit breakers so that rapid switching of the verification loops is realized, the working efficiency is improved, the workloadis reduced, and the situation that the detection loops need to be manually reconnected when different current ratios are detected each time is avoided. The device is convenient for detection and easyto operate and solves the problems of low working efficiency and large workload of the existing power transformer verification.

Description

technical field [0001] The invention relates to the technical field of power transformers, in particular to a device and method for quickly switching primary windings of power transformers. Background technique [0002] In my country's 6kV ~ 35kV power distribution system, current transformers are widely used, and whether their accuracy level is qualified is of great importance to both parties in the settlement of electricity trade. It is very important that it must be installed and used after passing the verification. The method used in the verification process is mainly based on the two verification regulations of JJG313-2010 "Current Transformer for Measurement" and JJG1021-2007 "Power Transformer". [0003] In power distribution systems, the difference method is used for testing current transformers, provided that the standard current transformer has the same current ratio as the current transformer under test. Since the primary current of the standard current transforme...

Claims

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Application Information

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IPC IPC(8): G01R35/02G01R1/20
CPCG01R35/02G01R1/206
Inventor 纪伊琳左右宇党三磊张永旺姚智聪靳威邓珊
Owner MEASUREMENT CENT OF GUANGDONG POWER GRID CO LTD
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