CN104391264A - System and method for checking multifunctional electronic transformer - Google Patents
System and method for checking multifunctional electronic transformer Download PDFInfo
- Publication number
- CN104391264A CN104391264A CN201410738648.9A CN201410738648A CN104391264A CN 104391264 A CN104391264 A CN 104391264A CN 201410738648 A CN201410738648 A CN 201410738648A CN 104391264 A CN104391264 A CN 104391264A
- Authority
- CN
- China
- Prior art keywords
- mutual inductor
- standard
- transformer
- tested
- digital multimeter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Supply And Distribution Of Alternating Current (AREA)
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
The present invention relates to electronic mutual inductor, particularly a kind of multi-function electronic transformer checking system and method for calibration, be applicable to the digital transformer substation ratio error of electronic mutual inductor and the verification of phase error with modulating output or numeral output.
Background technology
The mid-90 in 20th century, International Electrotechnical Commissio estimates that future will develop digital integration transformer station, has drafted the IEC61850 series standard of communication network and system in the transformer station that faces the future.Electronic mutual inductor is as the measuring equipment of the bottom in transformer station, and its measurement data must meet the data layout that IEC standard specifies.For specification and the development promoting electronic mutual inductor, IEC has formulated electronic type voltage transformer (referred to as EVT) standard IEC 60044-7 and electronic current mutual inductor (referred to as ECT) standard IEC 60044-8 respectively in 1999 and 2002.2007, mutual inductor technical committee for standardization (TCST) of China completes GB/T20840.7-2007 (mutual inductor-7 part: electronic type voltage transformer) and GB/T20840.8-2007 (mutual inductor-8 part: electronic current mutual inductor), and this indicates that China formally starts to start applying of electronic mutual inductor.
Conventional electromagnetic voltage transformer secondary export as 100V or
current Transformer Secondary exports as 5A or 1A, the sensing principle of electronic mutual inductor and the way of output are then completely different, no matter be ECT or EVT, general its secondary output signal is simulation small voltage (being less than 4V) or digital quantity, therefore the calibration method being applicable to conventional electromagnetic mutual inductor is no longer applicable to electronic mutual inductor, calibrating and the magnitude tracing system of domestic current electronic mutual inductor are still blank, the stability and security that digital transformer substation runs directly is had influence on to whether accurate the verification of electronic mutual inductor ratio error and phase error is.
For the ECT of modulating output, the verification mode usually adopted both at home and abroad has two kinds:
The difference verification principle of a kind of with traditional current transformer is similar, after tested ECT, add a U/I transfer standard, outputed signal and converted to the current signal consistent with traditional CT, but due to the secondary output voltage of ECT very little (minimum 22.5mV), 5A and 1A difficulty to be converted into the output of standard secondary is very big, there is additive error and the capacity matching problem of amplifier element;
The second way be based on direct voltage measure verification mode as shown in Figure 5, it is advantageous that standard CT and ECT to be measured bis-output signal sizes are without the need to equal, but two passages must be synchronous to adopt the mode of data sampling to require, otherwise there will be the measuring error of phase place.
For the ECT that numeral exports, the verification mode usually adopted both at home and abroad has two kinds too:
A kind of method exports the numeral of electronic mutual inductor to be measured through D/A conversion, and the simulation secondary converting analog output signal and standard mutual inductor to outputs signal and compares.The advantage of this method changed by D/A after simulating signal can verify by the differential technique of conventional electromagnetic mutual inductor, cost is lower; But its difficult point is the phase error how Measurement accuracy is converted into simulating signal, this wherein contains the time delay of the links such as data sampling, A/D conversion, data processing, D/A conversion, the most important thing is to distinguish response problem that time delay is mutual inductor itself or introduces due to the conversion of D/A.
Another kind method converts the modulating output of standard electromagnetic transformer to digital signal through A/D converter, computer acquisition is to standardized digital signal, read in by the measuring-signal of verification electronic mutual inductor by interface, calculated amplitude and the phase place of measuring-signal by DFT.The measuring method of absolute error that what the measurement of this mode adopted is, the method is subject to the impact of A/D precision generally only can meet the verification of the ratio error of 0.2 grade of electronic mutual inductor, simultaneously because time synchronized performance cannot be determined to trace to the source, so phase error is difficult to ensure measuring accuracy.
From published patent, do not consider the impact of mains frequency fluctuation on assay, the yet not mentioned uncertainty how reducing measurement result.
Summary of the invention
The object of the present invention is to provide a kind of multi-function electronic transformer checking system and method for calibration, this system can under frequency jitter be 35Hz ~ 65Hz situation, keep ratio difference 0.01%, phase differential is within 0.3 ', increase substantially phase measurement and checking precision, meet the verification requirement of the electronic mutual inductor of 0.1S level and following grade.
Technical solution of the present invention is as follows:
A kind of multi-function electronic transformer checking system, comprises the simulation check system of mutual inductor and the check system two kinds of digital mutual inductor:
A kind of check system of simulating mutual inductor, feature is that its formation comprises: standard mutual inductor, two Agilent3458A digital multimeter, function generator, inductive voltage divider, standard I/V converts shunt and has the PC of electronic mutual inductor control software design and software for calculation, the annexation of each device is as follows: the secondary side joint standard I/V of described standard mutual inductor converts shunt, this standard I/V converts the input end of output termination the one Agilent3458A digital multimeter of shunt, two HP3458A digital multimeter connect PC by GPIB-USB line, described function generator is connected with described PC by GPIB-USB, described function generator is connected with described two Agilent3458A digital multimeter, the input end of second Agilent3458A digital multimeter connects the secondary output terminal of to-be-tested transformer.
A kind of check system of digital mutual inductor, feature is that its formation comprises: standard mutual inductor, one Agilent 3458A digital multimeter, function generator, inductive voltage divider, standard I/V converts shunt and has the PC of electronic mutual inductor control software design and software for calculation, the annexation of each device is as follows: the secondary side joint standard I/V of described standard mutual inductor converts shunt, this standard I/V converts the input end of output termination the one HP 3458A digital multimeter of shunt, one HP 3458A digital multimeter connects PC by GPIB-USB line, described function generator is connected with described PC by GPIB-USB, described function generator is connected with a described Agilent3458A digital multimeter, the tested merge cells of to-be-tested transformer is connected with described PC.
Utilize the check system of simulation mutual inductor to verify the method for simulation mutual inductor to be measured, comprise the following steps:
1) according to the transformation ratio selection standard mutual inductor of to-be-tested transformer, when mutual inductor to be measured is current transformer, the primary current end series connection of standard mutual inductor and to-be-tested transformer, the secondary side joint standard I/V of standard mutual inductor converts shunt; When mutual inductor to be measured is voltage transformer (VT), the primary voltage end of standard mutual inductor and to-be-tested transformer is in parallel, the secondary side joint inductive voltage divider of standard mutual inductor, described signal generator accepts the synchronized sampling order that PC sends, two 3458A digital multimeter start synchronously, and the secondary of standard for manual sampling mutual inductor and to-be-tested transformer exports respectively;
2) start-up routine, carries out initialization;
3) determining program whether successful connection, if successful connection, proceeds next step, otherwise terminates, and whether inspection apparatus connecting line connects;
4) Agilent 3458A and Agilent33250 parameter is configured;
5) PC described in sends the enable useful signal of single to Agilent 3458A;
6) PC captures data from Ethernet interface, and judge that packet capturing success is no, success just carries out next step, otherwise just gets back to the 5th) step;
7) PC reads the data of Agilent 3458A;
8) utilize modified quasi-synchronous algorithm to calculate frequency difference and frequency, whether determination frequency, in specialized range, outside regulation, is thought wrong point, is got back to the 4th) step;
9) PC ratio calculated difference and phase differential, the amplitude A1 of standard mutual inductor and phase place
the amplitude A2 of tested mutual inductor and phase place
described ratio difference computing formula is
the computing formula of described phase differential is
10) result is shown;
11) judge whether verification terminates, and does not terminate to get back to the 4th step.
Utilize the check system of digital mutual inductor to verify the method for digital mutual inductor to be measured, comprise the following steps:
1) according to the transformation ratio selection standard mutual inductor of to-be-tested transformer, when to be measured be current transformer time, standard mutual inductor and to-be-tested transformer primary current end series connection, the secondary side joint standard I/V of standard mutual inductor converts shunt; When to-be-tested transformer is voltage transformer (VT), the primary voltage end of standard mutual inductor and to-be-tested transformer is in parallel, select the secondary side joint inductive voltage divider at standard mutual inductor, the synchronization pulse that synchronous device sends exports to tested merge cells and the Agilent33250A signal generator of electronic mutual inductor to be measured respectively, under the effect of this synchronizing pulse, the First Agilent3458A digital multimeter of described standard mutual inductor secondary side and the tested merge cells of described to-be-tested transformer secondary side start synchronized sampling;
2) start-up routine, carries out initialization;
3) determining program whether successful connection, if successful connection, proceeds next step, otherwise terminates, and whether inspection apparatus connecting line connects;
4) Agilent 3458A and Agilent33250 parameter is configured;
5) PC described in sends the enable useful signal of single to Agilent 3458A;
6) PC captures tested merge cells data from Ethernet interface, and judge that packet capturing success is no, success just carries out next step, otherwise just gets back to the 5th) step;
7) PC reads the data of Agilent 3458A;
8) utilize modified quasi-synchronous algorithm to calculate frequency difference and frequency, whether determination frequency, in specialized range, outside regulation, is thought wrong point, is got back to the 4th) step;
9) PC ratio calculated difference and phase differential, the amplitude A1 of standard mutual inductor and phase place
the amplitude A2 of tested mutual inductor and phase place
described ratio difference computing formula is
the computing formula of described phase differential is
10) result is shown;
11) judge whether verification terminates, and does not terminate to get back to the 5th) step.
Principle of work of the present invention:
The electronic mutual inductor of analog output: two Agilent3458A digital multimeter standard for manual sampling source and to-be-tested transformer signal respectively, convert digital signal to, then PC reads the data of two digital multimeter (Agilent 3458A);
The electronic mutual inductor of digital output: Agilent3458A digital multimeter standard for manual sampling source signal, tested merge cells gathers to-be-tested transformer signal, imports PC into by Ethernet;
When PC obtains two paths of signals, first calculate the frequency of standard source signal, then calculate amplitude and the phase place of two paths of signals respectively, then calculate by the ratio difference of school mutual inductor and standard mutual inductor and phase differential, and preserve.
Feature of the present invention and technique effect:
The present invention has normalized current, voltage transformer (VT) interface, electronic current, voltage transformer (VT) interface (Ethernet interface, USB interface).The present invention be by standard mutual inductor with compared by school mutual inductor, calculated by the respective phase place of the ratio difference of school mutual inductor and standard mutual inductor, phase differential, frequency instrument and amplitude by algorithm, record carried out to check results.
What the present invention adopted is the design philosophy of virtual instrument, and carry out parameter configuration to instrument as required by the supporting program of PC, the link completing whole system so important is exactly the synchronous of two paths of signals.
The present invention can calibration mode analog quantity export electronic type voltage transformer, current transformer, the ratio difference of all kinds such as electronic type voltage transformer, current transformer verification of digital output and the electronic mutual inductor of various rank, phase differential, the amplitude of frequency and two paths of signals and phase calculation.Complicated in operating mode, in the electrical network that frequency jitter is large, still can meet verification requirement.
Accompanying drawing explanation
Fig. 1 is the electronic type transformer checking system structural drawing of analog output of the present invention.
Fig. 2 is the electronic type transformer checking system structural drawing of digital output of the present invention.
Fig. 3 is the electronic mutual inductor program flow diagram of software kit analog output of the present invention.
Fig. 4 is the electronic mutual inductor program flow diagram of software kit digital output of the present invention.
Fig. 5 is the existing verification mode circuit diagram measured based on direct voltage
Embodiment
The present invention relates to multi-function electronic transformer checking system, the electronic type transformer checking system comprising analog output, as Fig. 1, comprises standard mutual inductor, as standard source signal; To-be-tested transformer, for providing tested signal; Two Agilent3458A digital multimeter, for difference standard for manual sampling transducer signal and to-be-tested transformer signal; Agilent 33250 function signal generator, for receiving the trigger pip of software kit, sends trigger pulse triggers Agilent 3458A; GPIB-USB line, for connecting PC and Agilent 3458A digital multimeter and Agilent 33250 function generator; Software kit is mainly used in arranging instrument, receives data, process data, important results such as display ratio difference and phase differential etc.
The electronic type transformer checking system of digital output, as Fig. 2, comprises standard mutual inductor, as standard source signal; To-be-tested transformer, for providing tested signal; An Agilent3458A digital multimeter, for standard for manual sampling source signal; Agilent 33250 function generator, for receiving the trigger pip of synchronous device, sends trigger pulse triggers Agilent3458A; GPIB-USB line, for connecting PC and HP3458A digital multimeter and Agilent 33250 function generator; Software kit is mainly used in arranging instrument, receives data, process data, important results such as display ratio difference and phase differential etc.
PC:
The PC of needs of the present invention should comprise USB interface, Ethernet interface, USB interface realizes PC software kit and instrument (Agilent3458A, Agilent33250) communicate, Ethernet interface realizes PC and tested merge cells communication, (can turn electric ethernet device by optical Ethernet, Ethernet data be converted to the data that PC can obtain from network interface, such PC only needs to comprise USB interface, RJ45 network interface).
PC software kit of the present invention adopts the design philosophy of virtual instrument, and this control program comprises instrument parameter configuration, checking algorithm, calibration tails, ratio difference and phase differential display, frequency computation part, image display etc.
As shown in Figure 3, idiographic flow is as follows for the electronic mutual inductor program flow diagram of PC software kit analog output:
1) according to the transformation ratio selection standard mutual inductor of to-be-tested transformer, when mutual inductor to be measured is current transformer, the primary current end series connection of standard mutual inductor and to-be-tested transformer, the secondary side joint standard I/V of standard mutual inductor converts shunt; When mutual inductor to be measured is voltage transformer (VT), the primary voltage end of standard mutual inductor and to-be-tested transformer is in parallel, the secondary side joint inductive voltage divider of standard mutual inductor, described signal generator accepts the synchronized sampling order that PC sends, two 3458A digital multimeter start synchronously, and the secondary of standard for manual sampling mutual inductor and to-be-tested transformer exports respectively;
2) start-up routine, carries out initialization;
3) determining program whether successful connection, if successful connection, proceeds next step, otherwise terminates, and whether inspection apparatus connecting line connects;
4) Agilent 3458A and Agilent33250 parameter is configured;
5) PC described in sends the enable useful signal of single to Agilent 3458A;
6) PC captures data from Ethernet interface, and judge that packet capturing success is no, success just carries out next step, otherwise just gets back to the 5th) step;
7) PC reads the data of Agilent 3458A;
8) utilize modified quasi-synchronous algorithm to calculate frequency difference and frequency, whether determination frequency, in specialized range, outside regulation, is thought wrong point, is got back to the 4th) step;
9) PC ratio calculated difference and phase differential, the amplitude A1 of standard mutual inductor and phase place
the amplitude A2 of tested mutual inductor and phase place
described ratio difference computing formula is
the computing formula of described phase differential is
10) result is shown;
11) judge whether verification terminates, and does not terminate to get back to the 5th) step.
As shown in Figure 4, idiographic flow is as follows for the electronic mutual inductor program flow diagram of PC software kit digital output:
1) when measuring, the mode of connection of to-be-tested transformer as shown in Figure 2, according to the transformation ratio selection standard mutual inductor of to-be-tested transformer, when to be measured be current transformer time, standard mutual inductor and to-be-tested transformer primary current end series connection, the secondary side joint standard I/V of standard mutual inductor converts shunt; When to-be-tested transformer is voltage transformer (VT), the primary voltage end of standard mutual inductor and to-be-tested transformer is in parallel, select the secondary side joint inductive voltage divider at standard mutual inductor, the synchronization pulse that synchronous device sends exports to tested merge cells and the 33250A signal generator of electronic mutual inductor to be measured respectively, and under the effect of this synchronous pulse per second (PPS), the 3458A of standard mutual inductor secondary side and electronic mutual inductor to be measured start synchronized sampling.
2) start-up routine, carries out initialization;
3) determining program whether successful connection, if successful connection, proceeds next step, otherwise terminates, and whether inspection apparatus connecting line connects;
4) Agilent 3458A and Agilent33250 parameter is configured;
5) the enable useful signal of single is sent to Agilent 3458A;
6) PC captures tested merge cells data from Ethernet interface, and judge that packet capturing success is no, success just carries out next step, otherwise just gets back to the 5th) step;
7) PC reads the data of Agilent 3458A;
8) PC utilizes modified quasi-synchronous algorithm to calculate frequency difference and frequency, and whether determination frequency, in specialized range, outside regulation, is thought wrong point, got back to the 5th) step;
9) PC ratio calculated difference and phase differential, the amplitude of standard mutual inductor and tested mutual inductor and phase place;
According to the sampled data of the separate unit 3458A that PC reads, and from the sampled data of being sent by the tested merge cells of to-be-tested transformer that Ethernet interface captures, respectively by amplitude A1, A2 and initial phase that the nominal transformation ratio of standard mutual inductor and to-be-tested transformer is calculated separately
with
ratio difference computing formula
the computing formula of phase differential is
10) result is shown;
11) judge whether verification terminates, and does not terminate to get back to the 5th) step.
Function of the present invention and performance comprise following several aspect:
1. this device can calibration mode analog quantity export current electrons formula mutual inductor, voltage electronic formula mutual inductor, the current electrons formula mutual inductor of digital output, voltage electronic formula mutual inductor;
2. the electronic mutual inductor interface signal scope of analog output is configured according to mutual inductor model;
3. the host-host protocol of the electronic mutual inductor of digital output meets IEC61850-9-1, the form specified in IEC61850-9-2 and IEC61850-9-2LE;
4. this device PC software kit adopts the method for designing of virtual instrument, and there is configuration Agilent3458A at interface, and the setting parameter of Agilent 33250A, phase differential, frequency, amplitude and phase place poor by modified quasi-synchronous algorithm ratio calculated, and shows; Also show check results, the waveform of standard signal and tested signal simultaneously.
5. can flexible configuration signal range, sample frequency, verification number of times as required, standard no-load voltage ratio and tested no-load voltage ratio;
6. this device can in frequency within the scope of 35 ~ 65Hz, and reach ratio difference 0.01%, phase differential is within 0.3 '.
Claims (4)
1. simulate the check system of mutual inductor for one kind, be characterised in that its formation comprises: standard mutual inductor, two Agilent 3458A digital multimeter, function generator, inductive voltage divider, standard I/V converts shunt and has the PC of electronic mutual inductor control software design and software for calculation, the annexation of each device is as follows: the secondary side joint standard I/V of described standard mutual inductor converts shunt, this standard I/V converts the input end of output termination the one HP 3458A digital multimeter of shunt, two Agilent3458A digital multimeter connect PC by GPIB-USB line, described function generator is connected with described PC by GPIB-USB, described function generator is connected with described two Agilent3458A digital multimeter, the input end of second Agilent3458A digital multimeter connects the secondary output terminal of to-be-tested transformer.
2. the check system of a digital mutual inductor, be characterised in that its formation comprises: standard mutual inductor, one HP 3458A digital multimeter, function generator, inductive voltage divider, standard I/V converts shunt and has the PC of electronic mutual inductor control software design and software for calculation, the annexation of each device is as follows: the secondary side joint standard I/V of described standard mutual inductor converts shunt, this standard I/V converts the input end of output termination the one Agilent3458A digital multimeter of shunt, one Agilent3458A digital multimeter connects PC by GPIB-USB line, described function generator is connected with described PC by GPIB-USB, described function generator is connected with a described Agilent3458A digital multimeter, the described tested merge cells connecing to-be-tested transformer is connected with described PC.
3. utilize the check system of the simulation mutual inductor described in claim 1 to verify the method for simulation mutual inductor to be measured, it is characterized in that the method comprises the following steps:
1) according to the transformation ratio selection standard mutual inductor of to-be-tested transformer, when mutual inductor to be measured is current transformer, the primary current end series connection of standard mutual inductor and to-be-tested transformer, the secondary side joint standard I/V of standard mutual inductor converts shunt; When mutual inductor to be measured is voltage transformer (VT), the primary voltage end of standard mutual inductor and to-be-tested transformer is in parallel, the secondary side joint inductive voltage divider of standard mutual inductor, described signal generator accepts the synchronized sampling order that PC sends, two 3458A digital multimeter start synchronously, and the secondary of standard for manual sampling mutual inductor and to-be-tested transformer exports respectively;
2) start-up routine, carries out initialization;
3) determining program whether successful connection, if successful connection, proceeds next step, otherwise terminates, and whether inspection apparatus connecting line connects;
4) Agilent3458A digital multimeter and Agilent33250 function generator parameter is configured;
5) PC described in sends the enable useful signal of single to Agilent3458A digital multimeter;
6) PC captures data from Ethernet interface, and judge that packet capturing success is no, success just carries out next step, otherwise just gets back to the 5th) step;
7) PC reads the data of two Agilent 3458A digital multimeter;
8) utilize modified quasi-synchronous algorithm to calculate frequency difference and frequency, whether determination frequency, in specialized range, outside regulation, is thought wrong point, is got back to the 4th) step;
9) PC ratio calculated difference and phase differential, the amplitude A1 of standard mutual inductor and phase place
the amplitude A2 of tested mutual inductor and phase place
described ratio difference computing formula is
the computing formula of described phase differential is
10) result is shown;
11) judge whether verification terminates, and does not terminate to get back to the 5th) step.
4. utilize the check system of the digital mutual inductor described in claim 2 to verify the method for digital mutual inductor to be measured, it is characterized in that the method comprises the following steps:
1) according to the transformation ratio selection standard mutual inductor of to-be-tested transformer, when to be measured be current transformer time, standard mutual inductor and to-be-tested transformer primary current end series connection, the secondary side joint standard I/V of standard mutual inductor converts shunt; When to-be-tested transformer is voltage transformer (VT), the primary voltage end of standard mutual inductor and to-be-tested transformer is in parallel, select the secondary side joint inductive voltage divider at standard mutual inductor, the synchronization pulse that synchronous device sends exports to tested merge cells and the 33250A signal generator of electronic mutual inductor to be measured respectively, under the effect of this synchronizing pulse, the First 3458A digital multimeter of described standard mutual inductor secondary side and the tested merge cells of described to-be-tested transformer secondary side start synchronized sampling;
2) start-up routine, carries out initialization;
3) determining program whether successful connection, if successful connection, proceeds next step, otherwise terminates, and whether inspection apparatus connecting line connects;
4) parameter of Agilent3458A digital multimeter and Agilent33250 function generator is configured;
5) PC described in sends the enable useful signal of single to Agilent 3458A digital multimeter;
6) PC captures tested merge cells data from Ethernet interface, and judge that packet capturing success is no, success just carries out next step, otherwise just gets back to the 5th) step;
7) PC reads the data of Agilent3458A digital multimeter;
8) utilize modified quasi-synchronous algorithm to calculate frequency difference and frequency, whether determination frequency, in specialized range, outside regulation, is thought wrong point, is got back to the 5th) step;
9) PC ratio calculated difference and phase differential, the amplitude A1 of standard mutual inductor and phase place
the amplitude A2 of tested mutual inductor and phase place
described ratio difference computing formula is
the computing formula of described phase differential is
10) result is shown;
11) judge whether verification terminates, and does not terminate to get back to the 5th) step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410738648.9A CN104391264B (en) | 2014-12-05 | 2014-12-05 | Multi-function electronic transformer checking system and method for calibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410738648.9A CN104391264B (en) | 2014-12-05 | 2014-12-05 | Multi-function electronic transformer checking system and method for calibration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104391264A true CN104391264A (en) | 2015-03-04 |
| CN104391264B CN104391264B (en) | 2018-08-14 |
Family
ID=52609189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410738648.9A Active CN104391264B (en) | 2014-12-05 | 2014-12-05 | Multi-function electronic transformer checking system and method for calibration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104391264B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107656163A (en) * | 2017-08-31 | 2018-02-02 | 陈劲游 | The wiring of phase three-wire three metering device and the investigating method for being grounded automatic detection instrument |
| CN112327237A (en) * | 2020-11-17 | 2021-02-05 | 国网四川省电力公司电力科学研究院 | Error calibration system and method for broadband wide-range current transformer |
| CN114062763A (en) * | 2021-11-18 | 2022-02-18 | 浙江天正电气股份有限公司 | Mutual inductor assembly and implementation method and use method thereof without secondary calibration |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20120947U1 (en) * | 2001-12-24 | 2003-05-08 | EMH Elektrizitätszähler GmbH & Co. KG, 19243 Wittenburg | Electronic electricity meter, especially household meter |
| CN101290345A (en) * | 2008-06-06 | 2008-10-22 | 北京浩霆光电技术有限责任公司 | Multifunctional mutual-inductor tester |
| CN101556318A (en) * | 2009-04-20 | 2009-10-14 | 江苏省电力试验研究院有限公司 | Self-adapting combiner delay time and synchronous electronic mutual inductor steady state checking device |
| CN101770005A (en) * | 2010-01-22 | 2010-07-07 | 云南电力试验研究院(集团)有限公司 | DC electronic transformer calibration device and method |
| CN102053235A (en) * | 2010-10-21 | 2011-05-11 | 中国南方电网有限责任公司超高压输电公司柳州局 | On-site steady-state accuracy verification system for electronic current transformer and verification method thereof |
| CN102435974A (en) * | 2011-06-16 | 2012-05-02 | 江苏靖江互感器厂有限公司 | Novel high-efficient portable electronic transformer inspection instrument for intelligent power grid |
| CN202548314U (en) * | 2012-03-27 | 2012-11-21 | 上海市电力公司 | Precision checking system for mutual inductor |
| CN203551762U (en) * | 2013-11-08 | 2014-04-16 | 国家电网公司 | Electronic instrument transformer and merging unit verification system |
| CN104101856A (en) * | 2014-07-15 | 2014-10-15 | 国家电网公司 | Method and device for detecting error of electronic measurement unit of zero-flux DC (Direct Current) current transformer |
-
2014
- 2014-12-05 CN CN201410738648.9A patent/CN104391264B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20120947U1 (en) * | 2001-12-24 | 2003-05-08 | EMH Elektrizitätszähler GmbH & Co. KG, 19243 Wittenburg | Electronic electricity meter, especially household meter |
| CN101290345A (en) * | 2008-06-06 | 2008-10-22 | 北京浩霆光电技术有限责任公司 | Multifunctional mutual-inductor tester |
| CN101556318A (en) * | 2009-04-20 | 2009-10-14 | 江苏省电力试验研究院有限公司 | Self-adapting combiner delay time and synchronous electronic mutual inductor steady state checking device |
| CN101770005A (en) * | 2010-01-22 | 2010-07-07 | 云南电力试验研究院(集团)有限公司 | DC electronic transformer calibration device and method |
| CN102053235A (en) * | 2010-10-21 | 2011-05-11 | 中国南方电网有限责任公司超高压输电公司柳州局 | On-site steady-state accuracy verification system for electronic current transformer and verification method thereof |
| CN102435974A (en) * | 2011-06-16 | 2012-05-02 | 江苏靖江互感器厂有限公司 | Novel high-efficient portable electronic transformer inspection instrument for intelligent power grid |
| CN202548314U (en) * | 2012-03-27 | 2012-11-21 | 上海市电力公司 | Precision checking system for mutual inductor |
| CN203551762U (en) * | 2013-11-08 | 2014-04-16 | 国家电网公司 | Electronic instrument transformer and merging unit verification system |
| CN104101856A (en) * | 2014-07-15 | 2014-10-15 | 国家电网公司 | Method and device for detecting error of electronic measurement unit of zero-flux DC (Direct Current) current transformer |
Non-Patent Citations (4)
| Title |
|---|
| 傅中君 等: "基于准同步DFT的非整数谐波分析算法", 《仪器仪表学报》 * |
| 戴先中: "进一步提高准同步采样谐波分析准确度的两种方法", 《仪器仪表学报》 * |
| 沈国峰 等: "进一步提高准同步采样谐波分析法准确度的方案", 《仪器仪表学报》 * |
| 童悦: "电流互感器在线校验关键技术研究", 《中国博士学位论文全文数据库•工程科技II辑》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107656163A (en) * | 2017-08-31 | 2018-02-02 | 陈劲游 | The wiring of phase three-wire three metering device and the investigating method for being grounded automatic detection instrument |
| CN107656163B (en) * | 2017-08-31 | 2020-04-21 | 陈劲游 | Measurement and control method for automatic wiring and grounding detection instrument of three-phase three-wire metering device |
| CN112327237A (en) * | 2020-11-17 | 2021-02-05 | 国网四川省电力公司电力科学研究院 | Error calibration system and method for broadband wide-range current transformer |
| CN114062763A (en) * | 2021-11-18 | 2022-02-18 | 浙江天正电气股份有限公司 | Mutual inductor assembly and implementation method and use method thereof without secondary calibration |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104391264B (en) | 2018-08-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101655544B (en) | Device for measuring and checking errors of digital mutual inductor | |
| CN104569902B (en) | Digital type electric energy meter power consumption measuring device and method | |
| CN102073029A (en) | Electronic mutual inductor test system and test method | |
| CN206193226U (en) | Synchronous calbiration system of direct current voltage transformer | |
| CN102539916A (en) | Synchronous phasor measuring device of ship electrical power system | |
| CN101770005A (en) | DC electronic transformer calibration device and method | |
| CN105203983A (en) | Flexible alternating current/direct current electronic transformer checking device based on mixed sampling | |
| CN101718851B (en) | Calibrating apparatus for electronic transducer calibration instrument based on alternating current bridge balance principle | |
| CN105548948A (en) | Device and method for testing digitalization electric energy metering system | |
| CN202305785U (en) | Calibrating device based on tracing technology for 0.05-level DC electric energy meter | |
| CN204945357U (en) | A kind of electronic mutual inductor steady state error measuring means | |
| CN106405470A (en) | Overall detection method and apparatus for harmonic accuracy of electronic current transformer | |
| CN203658453U (en) | Wireless secondary voltage-drop and load tester provided with wireless synchronous communication function | |
| CN102130501A (en) | Wireless synchronous data acquisition device for checking direct current transformer of direct current converter station | |
| CN102129058A (en) | Direct-current voltage divider calibration device for direct-current power transmission system | |
| CN104391264A (en) | System and method for checking multifunctional electronic transformer | |
| CN106646321A (en) | DC current transformer synchronous calibration method and system | |
| CN103235279B (en) | A kind of electric mutual inductor output verification device | |
| CN105548947B (en) | A kind of synchronous source tracing method of digitalized electrical energy meter and system | |
| CN104569899A (en) | High-accuracy high-voltage direct-current transformer calibrator | |
| CN201955465U (en) | Electronic transformer test system | |
| CN206832977U (en) | Electronic mutual inductor verification system | |
| CN105954702B (en) | The phase error detection system and method for electronic transducer calibration instrument | |
| CN103278676B (en) | The current true virtual value detection circuit of motor soft starter | |
| CN102866378B (en) | Voltage or current transformer on-line test device and voltage or current transformer on-line test method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |