CN101872004B - Calibrating test device of electronic type transformer checking instrument - Google Patents

Abstract

The invention provides a calibration test device for an electronic transformer calibrator, which includes a power frequency proportional power supply, a standard A/D converter, a synchronous pulse generating device, a data packet software processing device, and an electronic transformer to be calibrated. instrument, in which the power frequency proportional power supply includes an error display unit, a standard small signal output unit, a standard current or voltage signal output unit and an output control unit, and the electronic transformer calibrator to be calibrated includes the electronic transformer calibrator to be calibrated Standard signal input unit, synchronous clock input unit of electronic transformer calibrator to be checked, analog input unit to be tested of electronic transformer calibrator to be checked, and digital quantity to be tested of electronic transformer calibrator to be checked Input unit; this device can not only perform the overall error calibration test on the analog quantity calibration function of the electronic transformer calibrator, but also perform the overall error calibration on the digital quantity calibration function of the electronic transformer calibrator, fill the gaps in this field.

Description

A calibration test device for an electronic transformer calibrator

technical field

The invention relates to a calibration test device for an electronic transformer calibrator, which belongs to the field of calibration, verification and detection of the electronic transformer calibrator.

Background technique

Electronic transformers are decisive equipment for building digital substations and play a vital role. Many manufacturers at home and abroad have launched electronic transformer products. There are many types of electronic transformer products on the market, and the product quality is also uneven. However, due to the lack of corresponding calibration methods, electronic transformer products have not been reliably calibrated. Many manufacturers use their own electronic transformer calibrator to calibrate their electronic transformers. The calibration test itself is not satisfied, which is a serious hidden danger to the safe operation of the power system. This has become a bottleneck in the promotion of electronic transformers, restricting the development of digital substations in my country, and affecting the construction process of a unified and strong smart grid.

At present, the existing calibrator inspection system is mainly used for the calibration test of traditional transformer calibrator, which cannot meet the calibration requirements of electronic transformers, such as Chinese patent 200810007590.5 "Full-automatic transformer calibrator inspection system" , for the detection of traditional transformer testers, because the output mode of electronic transformers is different from traditional ones, traditional calibrators cannot measure, so the whole inspection system cannot test electronic transformer testers.

The purpose of developing the calibration test device for electronic transformer calibrator is to control the quality of electronic transformer products from the source, standardize the electronic transformer market, ensure the reliable operation of the power system, and accelerate the construction of a unified and strong smart grid in my country.

Contents of the invention

The invention provides a calibration test device for an electronic transformer calibrator. As a calibration measurement system, it can not only perform an overall error calibration test on the analog quantity calibration function of the electronic transformer calibrator, but also can The overall error calibration is performed on the digital quantity calibration function of the electronic transformer calibrator to fill the gap in this field.

The technical solution of the present invention is: a calibration test device for an electronic transformer calibrator, including a standard A/D converter and a synchronous pulse generator, characterized in that it also includes a power frequency proportional power supply and a data packet software processing device And the electronic transformer calibrator to be calibrated, wherein the power frequency proportional power supply includes an error display unit, a standard small signal output unit, a standard current or voltage signal output unit and an output control unit, and the electronic transformer calibrator to be calibrated includes a The standard signal input unit of the electronic transformer calibrator to be calibrated, the synchronous clock input unit of the electronic transformer calibrator to be calibrated, the analog input unit to be tested and the electronic mutual inductance to be calibrated The measured digital input unit of the device calibrator;

When verifying the digital quantity calibration function of the electronic transformer calibrator to be calibrated, the standard small signal output unit, the standard current or voltage signal output unit are respectively connected to the standard A/D converter and the electronic transformer to be calibrated The standard signal input unit of the instrument, the standard A/D converter is connected to the data packet software processing device, the data packet software processing device is connected to the measured digital input unit of the electronic transformer calibrator to be calibrated, and the synchronous pulse generating device is connected to the standard The A/D converter is connected to the synchronous clock input unit of the electronic transformer calibrator;

When verifying the analog quantity calibration function of the electronic transformer calibrator to be calibrated, the standard small signal output unit, standard current or voltage signal output unit are respectively connected to the measured analog input of the electronic transformer calibrator to be calibrated unit and the standard signal input unit of the electronic transformer calibrator to be checked, and the synchronous pulse generating device is connected to the synchronous clock input unit of the electronic transformer calibrator to be checked.

The beneficial effects of the present invention are: the present invention provides an effective method for the overall calibration of the digital quantity calibration and analog quantity calibration functions of the electronic transformer calibrator, which can be used for various aspects of the electronic transformer calibrator Conduct a comprehensive inspection of the measurement performance, provide guarantee for the reliable verification of electronic transformers, control the quality of electronic transformer products from the source, standardize the electronic transformer market, ensure the reliable operation of the power system, and accelerate the construction of a unified and strong smart grid in my country .

Description of drawings

Fig. 1 is a block diagram of the working principle of digital quantity verification according to the embodiment of the present invention.

Fig. 2 is a block diagram of the working principle of analog quantity verification according to the embodiment of the present invention.

Detailed ways

The calibration test device of the electronic transformer calibrator of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Marks in Figure 1 and Figure 2: 1-power frequency proportional power supply, 2-error display unit, 3-standard small signal output unit, 4-standard current or voltage signal output unit, 5-output control unit, 6-standard A /D converter, 7-synchronous pulse generator, 8-data packet software processing device, 9-standard signal input unit of electronic transformer calibrator to be calibrated, 10-synchronous clock of electronic transformer calibrator to be calibrated Input unit, 11-The measured analog input unit of the electronic transformer calibrator to be calibrated, 12-The digital input unit to be tested of the electronic transformer calibrator to be calibrated, 13-The electronic transformer calibrator to be calibrated Test instrument.

As shown in Figure 1, the embodiment of the present invention comprises power frequency proportional power supply 1, standard A/D converter 6, synchronous pulse generation device 7, data packet software processing device 8 and electronic transformer calibrator 13 to be calibrated, work The frequency proportional power supply 1 includes an error display unit 2, a standard small signal output unit 3, a standard current or voltage signal output unit 4 and an output control unit 5, and the electronic transformer calibrator 13 to be calibrated includes The standard signal input unit 9 of the instrument, the synchronous clock input unit 10 of the electronic transformer calibrator to be calibrated, the analog input unit 11 of the electronic transformer calibrator to be calibrated, and the electronic transformer calibrator to be calibrated The measured digital input unit 12.

For the verification of the digital quantity verification function of the electronic transformer calibrator to be calibrated, as shown in Figure 1. The standard signal generated by the standard small signal output unit 3 and the standard current or voltage signal output unit 4 is respectively connected to the standard A/D converter 6 and the standard signal input unit 9 of the electronic transformer calibrator to be calibrated; the standard A/D The output signal of the converter 6 is passed to the data packet software processing device 8; the output signal of the data packet software processing device 8 is passed to the measured digital input unit 12 of the electronic transformer calibrator to be calibrated; the synchronous pulse generating device 7 is respectively It is connected with the standard A/D converter 6 and the synchronous clock input unit 10 of the tested electronic transformer calibrator.

For the verification of the analog quantity verification function of the electronic transformer calibrator to be calibrated, as shown in Figure 2. The standard signals generated by the standard small signal output unit 3 and the standard current or voltage signal output unit 4 are respectively connected to the measured analog input unit 11 of the electronic transformer calibrator to be calibrated and the electronic transformer calibrator to be calibrated. The standard signal input unit 9; the synchronous pulse generator 7 is connected with the synchronous clock input unit 10 of the electronic transformer calibrator to be checked.

Among them, the standard small signal output unit 3 can generate the rated voltage value of the electronic transformer that meets the requirements of IEC60044-7/8, and the standard current or voltage signal output unit 4 can generate a proportional standard current or voltage signal. The standard A/D converter 6 has an accuracy class better than 0.01. The output signal is sent to the data packet software processing device 8 to convert the digital signal output by the standard A/D converter into a digital frame specified by IEC61850-9-1/2.

During specific implementation, the power frequency proportional power supply 1 simultaneously generates a standard small signal and a standard current or voltage signal, and the ratio between the two signals is controlled by the output control unit 5; Function verification, the standard small signal is converted into a digital signal by the A/D converter 6, and then packaged into a digital frame specified by IEC61850-9-1/2 by the data packet software processing device 8, and input to the electronic transformer to be calibrated The tested digital input unit 12 of the tester. The standard current or voltage signal is directly connected to the standard signal input unit 9 of the electronic transformer calibrator to be calibrated. At the same time, the synchronous pulse generating device 7 is respectively connected with the standard A/D converter 6 and the synchronous clock input unit 10 of the electronic transformer calibrating instrument to control the synchronous sampling of the two. The electronic transformer calibrator 13 to be calibrated performs corresponding calculations through the data collected by the standard signal input unit 9 of the electronic transformer calibrator to be calibrated and the digital input unit 12 of the electronic transformer calibrator to be calibrated The obtained error is then compared with the error display unit 2 of the power frequency proportional power supply 1 to obtain the overall error of the digital quantity calibration function of the electronic transformer to be calibrated.

For the verification of the analog quantity calibration function of the electronic transformer calibrator to be checked, the standard small signal is input to the analog quantity input unit 11 of the electronic transformer calibrator to be tested. The standard current or voltage signal is directly connected to the standard signal input unit 9 of the electronic transformer calibrator to be calibrated. At the same time, the synchronous pulse generating device 7 is connected to the synchronous clock input unit 10 of the electronic transformer calibrator to be calibrated. The electronic transformer calibrator 13 to be calibrated performs corresponding calculations through the data collected by the standard signal input unit 9 of the electronic transformer calibrator to be calibrated and the digital input unit 11 of the electronic transformer calibrator to be calibrated The obtained error is then compared with the error display unit 2 of the power frequency proportional power supply 1 to obtain the overall error of the digital quantity calibration function of the electronic transformer to be calibrated.

Claims (1)

1. the calibrating test device of an electronic transducer calibration instrument; Comprise standard A/D converter, synchronizing pulse generating means; It is characterized in that: also comprise power frequency ratio power supply, packet software processing device and by the school electronic transducer calibration instrument; Wherein power frequency ratio power supply comprises error display unit, standard small-signal output unit, normalized current or voltage signal output unit and output control unit, is comprised by the standard signal input block of school electronic transducer calibration instrument, by school electronic transducer calibration instrument synchronous clock input block, by the tested analog input unit of school electronic transducer calibration instrument with by the measured number amount input block of school electronic transducer calibration instrument by the school electronic transducer calibration instrument;

When examining and determine by the digital quantity verifying function of school electronic transducer calibration instrument; Standard small-signal output unit, normalized current or voltage signal output unit insert standard A/D converter respectively and by the standard signal input block of school electronic transducer calibration instrument; Standard A/D converter connects the packet software processing device; The packet software processing device connects by the measured number amount input block of school electronic transducer calibration instrument, the synchronizing pulse generating means respectively with standard A/D converter be connected by school electronic transducer calibration instrument synchronous clock input block;

When examining and determine by the analog quantity verifying function of school electronic transducer calibration instrument; Standard small-signal output unit, normalized current or voltage signal output unit insert respectively by the tested analog input unit of school electronic transducer calibration instrument with by the standard signal input block of school electronic transducer calibration instrument, the synchronizing pulse generating means be connected by school electronic transducer calibration instrument synchronous clock input block.

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