CN101872004A - Calibrating test device of electronic type transformer checking instrument - Google Patents

Abstract

The invention provides a calibrating test device of an electronic type transformer checking instrument, comprising a power-frequency proportion power supply, a standard A/D converter, a synchronous-pulse generating device, a packet software processing device and a checked electronic type transformer checking instrument, wherein the power-frequency proportion power supply comprises 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 checked electronic type transformer checking instrument comprises a standard signal input unit of the checked electronic type transformer checking instrument, a synchronous clock input unit of the checked electronic type transformer checking instrument, a measured analog quantity input unit of the checked electronic type transformer checking instrument and a measured digital quantity input unit of the checked electronic type transformer checking instrument. The device not only can conduct a global error calibrating test on the calibrating function of the analog quantity of the electronic type transformer checking instrument, but also can conduct a global error calibrating test on the calibrating function of the digital quantity of the electronic type transformer checking instrument, and fill the blank of the field.

Description

A kind of calibrating test device of electronic transducer calibration instrument

Technical field

The present invention relates to a kind of calibrating test device of electronic transducer calibration instrument, belong to calibration, calibrating and detection range electronic transducer calibration instrument.

Background technology

Electronic mutual inductor is a decisive equipment of building digital transformer substation, plays most important effect.Lot of domestic and international producer has all released the electronic mutual inductor product, and the electronic mutual inductor product category is various on the market, and product quality also is uneven.But owing to lack corresponding calibration means, the electronic mutual inductor product is not all calibrated always reliably, its electronic mutual inductor is calibrated with the electronic transducer calibration instrument of oneself producing by a lot of producers, itself calibration test of the tester that uses is not being met especially, and this safe operation to electric system is a serious hidden danger.This has become the bottleneck that electronic mutual inductor is promoted, and is restricting the development of China's digital transformer substation, has had influence on the construction process of unified strong intelligent grid.

Present existing tester whole checking system is mainly used in the calibration test of traditional mutual-inductor tester, do not satisfy the verification demand of electronic mutual inductor, as Chinese patent 200810007590.5 " full-automatic mutual inductor tester whole checking system ", be used for the detection of traditional type mutual inductor check meter, because the electronic mutual inductor way of output is with traditional difference, traditional tester can't be measured, thereby whole checking system also can't be checked electronic transducer calibration instrument.

Development electronic transducer calibration instrument calibrating test device purpose is that the electric system reliability service is guaranteed in standard electronic mutual inductor market from the quality of source control electronic mutual inductor product, accelerates to advance the unified strong intelligent grid construction of China.

Summary of the invention

The invention provides a kind of calibrating test device of electronic transducer calibration instrument, as a calibration measurement system, it not only can carry out the global error calibration test to the analog quantity verifying function of electronic transducer calibration instrument, and can carry out the global error verification to the digital quantity verifying function of electronic transducer calibration instrument, fill up the blank in this field.

Technical scheme of the present invention is: a kind of calibrating test device of electronic transducer calibration instrument, standard A/D converter, the synchronizing pulse generating means, it is characterized in that: 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 the error display unit, standard small-signal output unit, normalized current or voltage signal output unit and output control unit are comprised by the standard signal input block of school electronic transducer calibration instrument by the 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;

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.

The invention has the beneficial effects as follows: the present invention provides a kind of effective method for the digital quantity verification and the analog quantity verifying function piece calibration of electronic transducer calibration instrument, can investigate the many-sided measurement performance of electronic transducer calibration instrument comprehensively, for the reliable calibrating of electronic mutual inductor provides safeguard, quality from source control electronic mutual inductor product, standard electronic mutual inductor market, guarantee the electric system reliability service, accelerate to advance the unified strong intelligent grid construction of China.

Description of drawings

Fig. 1 is an embodiment of the invention digital quantity verification principle of work block diagram.

Fig. 2 is an embodiment of the invention analog quantity verification principle of work block diagram.

Embodiment

Be described further below in conjunction with the calibrating test device of drawings and Examples electronic transducer calibration instrument of the present invention.

Fig. 1, mark among Fig. 2: 1-power frequency ratio power supply, 2-error display unit, 3-standard small-signal output unit, 4-normalized current or voltage signal output unit, the 5-output control unit, 6-standard A/D converter, 7-synchronizing pulse generating means, 8-packet software processing device, 9-is by the standard signal input block of school electronic transducer calibration instrument, 10-is by school electronic transducer calibration instrument synchronous clock input block, 11-is by the tested analog input unit of school electronic transducer calibration instrument, 12-is by the measured number amount input block of school electronic transducer calibration instrument, 13-is by the school electronic transducer calibration instrument.

As shown in Figure 1, the embodiment of the invention comprises power frequency ratio power supply 1, standard A/D converter 6, synchronizing pulse generating means 7, packet software processing device 8 and by school electronic transducer calibration instrument 13, power frequency ratio power supply 1 comprises error display unit 2, standard small-signal output unit 3, normalized current or voltage signal output unit 4 and output control unit 5 are comprised by the standard signal input block 9 of school electronic transducer calibration instrument by school electronic transducer calibration instrument 13, by school electronic transducer calibration instrument synchronous clock input block 10, by the tested analog input unit 11 of school electronic transducer calibration instrument with by the measured number amount input block 12 of school electronic transducer calibration instrument.

For being examined and determine, as shown in Figure 1 by the digital quantity verifying function of school electronic transducer calibration instrument.The standard signal that standard small-signal output unit 3, normalized current or voltage signal output unit 4 produce inserts standard A/D converter 6 respectively and by the standard signal input block 9 of school electronic transducer calibration instrument; The output signal of standard A/D converter 6 reaches packet software processing device 8; The output signal of packet software processing device 8 reaches by the measured number amount input block 12 of school electronic transducer calibration instrument; Synchronizing pulse generating means 7 respectively with standard A/D converter 6 be connected by school electronic transducer calibration instrument synchronous clock input block 10.

For being examined and determine, as shown in Figure 2 by the analog quantity verifying function of school electronic transducer calibration instrument.The standard signal that standard small-signal output unit 3, normalized current or voltage signal output unit 4 produce inserts respectively by the tested analog input unit 11 of school electronic transducer calibration instrument with by the standard signal input block 9 of school electronic transducer calibration instrument; Synchronizing pulse generating means 7 be connected by school electronic transducer calibration instrument synchronous clock input block 10.

Standard small-signal output unit 3 wherein can produce the electronic mutual inductor load voltage value that satisfies the IEC60044-7/8 regulation, and normalized current or voltage signal output unit 4 can produce proportional with it normalized current or voltage signal.The class of accuracy of standard A/D converter 6 is better than 0.01 grade.Output signal reaches the digital frame that packet software processing device 8 is converted to the digital signal of standard A/D converter output the IEC61850-9-1/2 regulation.

During concrete enforcement, power frequency ratio power supply 1 produces standard small-signal and normalized current or voltage signal simultaneously, and the ratio between two signals is by output control unit 5 controls; For being examined and determine by the digital quantity verifying function of school electronic transducer calibration instrument, after the standard small-signal is converted to digital signal by A/D converter 6, be packaged as the digital frame of IEC61850-9-1/2 regulation again by packet software processing device 8, input to by the measured number amount input block 12 of school electronic transducer calibration instrument.Normalized current or voltage signal then directly insert by the standard signal input block 9 of school electronic transducer calibration instrument.Simultaneously, synchronizing pulse generating means 7 respectively with standard A/D converter 6 be connected by school electronic transducer calibration instrument synchronous clock input block 10, control both synchronized samplings.By school electronic transducer calibration instrument 13 by by the standard signal input block 9 of school electronic transducer calibration instrument and by the data that the measured number amount input block 12 of school electronic transducer calibration instrument is gathered carry out corresponding calculate error, again with the error display unit 2 of power frequency ratio power supply 1 relatively, can draw by the digital quantity verifying function global error of school electronic mutual inductor.

For being examined and determine by the analog quantity verifying function of school electronic transducer calibration instrument, the standard small-signal inputs to by the tested analog input unit 11 of school electronic transducer calibration instrument.Normalized current or voltage signal then directly insert by the standard signal input block 9 of school electronic transducer calibration instrument.Simultaneously, synchronizing pulse generating means 7 be connected by school electronic transducer calibration instrument synchronous clock input block 10.By school electronic transducer calibration instrument 13 by by the standard signal input block 9 of school electronic transducer calibration instrument and by the data that the measured number amount input block 11 of school electronic transducer calibration instrument is gathered carry out corresponding calculate error, again with the error display unit 2 of power frequency ratio power supply 1 relatively, can draw by the digital quantity verifying function global error of school electronic mutual inductor.

Claims (1)

1. the calibrating test device of an electronic transducer calibration instrument, standard A/D converter, the synchronizing pulse generating means, it is characterized in that: 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 the error display unit, standard small-signal output unit, normalized current or voltage signal output unit and output control unit are comprised by the standard signal input block of school electronic transducer calibration instrument by the 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;

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.