An electronic current transformer performance test system and method

A technology for current transformers and test systems, which is applied to instruments, measuring electrical variables, measuring devices, etc., can solve problems such as increasing workload, reduce repeated wiring, facilitate on-site management, and improve test efficiency.

Active Publication Date: 2020-03-10
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +2
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the current field test, the test method is mainly a flow test, where currents of different sizes are passed through the primary side to test the accuracy and delay characteristics of the DC electronic transformer. Multiple wirings are required for the accuracy and delay characteristics tests. Repeated measurement increases the workload and also puts forward very high requirements for on-site management

Method used

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  • An electronic current transformer performance test system and method
  • An electronic current transformer performance test system and method
  • An electronic current transformer performance test system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Such as Figure 4 As shown, an electronic current transformer performance test system includes a standard current transformer connected in series on the primary side, a test electronic current transformer, and a sampling rate adaptive module and a merging unit module;

[0050] Both the standard current transformer and the test electronic current transformer are provided with a synchronous signal inlet for accessing the synchronous signal;

[0051]The input end of the sampling rate adaptive module is connected to the output end of the test electronic current transformer, and the input end of the merging unit module is connected to the output end of the standard current transformer and the sampling rate adaptive module respectively;

[0052] The sampling rate adaptive module receives the sampling value message output by the testing electronic current transformer, and judges the sampling rate of the testing electronic current transformer; then transmits the sampling rate a...

Embodiment 2

[0065] The difference between this embodiment and Embodiment 1 is:

[0066] Such as Figure 4 As shown, the described electronic current transformer performance test system also includes an electromagnetic current transformer and a delay compensation module;

[0067] The primary side of the electromagnetic current transformer is connected in series with the primary side of the testing electronic current transformer; the output terminals of the electromagnetic current transformer and the testing electronic current transformer are respectively connected to the input terminals of the delay compensation module;

[0068] The electromagnetic current transformer is provided with a synchronous signal inlet for accessing the synchronous signal;

[0069] The delay compensation module compares the time of the received sampled value message output by the test electronic current transformer with the time of the real-time analog output of the electromagnetic current transformer, and the te...

Embodiment 3

[0075] An electronic current transformer performance test method, comprising the following steps:

[0076] (1) Input synchronous signals to standard current transformers and test electronic current transformers;

[0077] (2) Test the electronic current transformer output sampling value message to the sampling rate adaptive module, after the sampling rate adaptive module judges the sampling rate, send the sampling rate and the received sampling value message to the merging unit module; The standard current transformer outputs the sampled value message to the merging unit module;

[0078] (3) The merging unit module compares the sampled value message output by the test electronic current transformer with the sampled value message output by the standard current transformer according to the received sampling rate, and uses the measured value of the standard current transformer as the standard value, to verify the accuracy of the test electronic current transformer.

[0079] Pref...

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Abstract

The invention discloses a test system and method for a performance of an electronic current transformer. The system is composed of a standard current transformer, a testing electronic current transformer, a sampling rate adaptive module, and a merging unit, wherein primary sides of the standard current transformer and the testing electronic current transformer are connected in series. The input terminal of the sampling rate adaptive module is connected with the output terminal of the testing electronic current transformer; the input terminal of the merging unit module is connected with the output terminals of the standard current transformer and the sampling rate adaptive module respectively. According to the invention, with simultaneous access of electromagnetic current transformer and the testing electronic current transformer sampling loops in hybrid sampling differential protection, time delay testing of a hybrid sampling differential loop is completed by using the electromagnetic current transformer as a reference. The system and method are applied to delay compensation in UPFC protection.

Description

technical field [0001] The invention belongs to the technical field of flexible direct current transmission, and in particular relates to an electronic current transformer performance test system and method. Background technique [0002] The DC electronic transformer is an important device for measuring the voltage of the flexible DC transmission system, and its measurement performance is related to the safe and stable operation of the flexible DC transmission system. Good on-site test equipment will help improve the test efficiency of DC voltage transformers and ensure the safe and stable operation of the flexible DC transmission system. [0003] In the current field test, the test method is mainly a flow test, where currents of different sizes are passed through the primary side to test the accuracy and delay characteristics of the DC electronic transformer. Multiple wirings are required for the accuracy and delay characteristics tests. Repeated measurement increases the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R35/02
CPCG01R35/02
Inventor 黄哲忱李鹏张弛高磊林金娇卜强生孔祥平
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST
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