Multifunctional Electronic Transformer Calibration System and Calibration Method

An electronic transformer and transformer technology, which is applied in the direction of instruments, measuring electrical variables, measuring devices, etc., can solve the uncertainty of measurement results without mentioning, without considering the influence of grid frequency fluctuations, time synchronization performance cannot be determined and traced, etc. question

Active Publication Date: 2018-08-14
SHANGHAI INST OF MEASUREMENT & TESTING TECH
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Problems solved by technology

The measurement of this method adopts the measurement method of absolute error, which is generally only able to meet the calibration of the ratio error of the 0.2-level electronic transformer due to the influence of A / D accuracy, and because the time synchronization performance cannot determine the traceability, so Phase error is difficult to guarantee measurement accuracy
[0010] Judging from the published patents, the impact of power grid frequency fluctuations on the test results is not considered, nor is it mentioned how to reduce the uncertainty of the measurement results

Method used

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  • Multifunctional Electronic Transformer Calibration System and Calibration Method
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  • Multifunctional Electronic Transformer Calibration System and Calibration Method

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Embodiment Construction

[0053] The invention relates to a multifunctional electronic transformer calibration system, including an electronic transformer calibration system with analog output such as figure 1 , including the standard transformer as the standard source signal; the transformer to be tested is used to provide the signal to be tested; two Agilent3458A digital multimeters are used to sample the signal of the standard transformer and the signal of the transformer to be tested; the Agilent33250 function signal generator, It is used to receive the trigger signal from the supporting software and send out the trigger pulse to trigger the Agilent 3458A; the GPIB-USB cable is used to connect the PC, the Agilent 3458A digital multimeter and the Agilent 33250 function generator; the supporting software is mainly used for setting the instrument, receiving data, processing data, showing important results such as ratio difference and phase difference.

[0054] Electronic transformer calibration syste...

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Abstract

The invention discloses a system and a method for checking a multifunctional electronic transformer. The checking system comprises an analogue transformer checking system, a digital transformer checking system, two digital multimeters Agilent 3458A, a function generator Agilent 33250, a signal synchronization device, a GPIB-USB and independent-developed supporting software. According to the system and the method for checking the multifunctional electronic transformer, no extra built-in modules are needed, the ratio error of the checking precision is up to 0.01%, the phase error is up to 0.3' and the industrial checking requirement can be completely satisfied.

Description

technical field [0001] The invention relates to electronic transformers, in particular to a multifunctional electronic transformer calibration system and calibration method, which is suitable for calibrating the ratio error and phase error of electronic transformers with analog output or digital output in digital substations. test. Background technique [0002] In the mid-1990s, the International Electrotechnical Commission expected to develop digital integrated substations in the future, and formulated the IEC61850 series standards for future communication networks and systems in substations. The electronic transformer is the lowest measurement device in the substation, and its measurement data must conform to the data format specified by the IEC standard. In order to standardize and promote the development of electronic transformers, IEC formulated the electronic voltage transformer (referred to as EVT) standard IEC60044-7 and electronic current transformer (referred to a...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R35/02
Inventor 潘洋石雷兵糜坚平周力任卢春凤秦毅
Owner SHANGHAI INST OF MEASUREMENT & TESTING TECH
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