CN104391264B - Multi-function electronic transformer checking system and method for calibration - Google Patents
Multi-function electronic transformer checking system and method for calibration Download PDFInfo
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- CN104391264B CN104391264B CN201410738648.9A CN201410738648A CN104391264B CN 104391264 B CN104391264 B CN 104391264B CN 201410738648 A CN201410738648 A CN 201410738648A CN 104391264 B CN104391264 B CN 104391264B
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Abstract
A kind of multi-function electronic transformer checking system and method for calibration, the check system includes the check system of the check system and digital mutual inductor of simulating mutual inductor, Agilent 3458A need two Agilent 3458A), Agilent 33250, synchronous signal device, GPIB USB and independent development software kit.The present invention does not need other additional built-in modules, and for accuracy of detection ratio error up to 0.01%, phase error fully meets industrial detection requirement up to 0.3 '.
Description
Technical field
The present invention relates to electronic mutual inductor, especially a kind of multi-function electronic transformer checking system and verification side
Method is suitable for digital transformer substation and the ratio error of the electronic mutual inductor with simulation output or numeral output and phase is used to miss
The verification of difference.
Background technology
The 1990s mid-term, International Electrotechnical Commissio it is estimated following will development digital integration substation, intend
Determine to face the future the IEC61850 series standards of communication network and system in substation.Electronic mutual inductor is as in substation
The measuring apparatus of the bottom, measurement data have to comply with data format as defined in IEC standard.For specification and push electronic type mutual
The development of sensor, IEC have formulated electronic type voltage transformer (referred to as EVT) standard in 1999 and 2002 respectively
IEC60044-7 and electronic current mutual inductor (referred to as ECT) standard IEC 60044-8.2007, the standardization of China's mutual inductor
Technical committee completes (7 parts of mutual inductor-the GB/T20840.7-2007：Electronic type voltage transformer) and GB/
(8 parts of mutual inductor-the T20840.8-2007：Electronic current mutual inductor), this indicates that China formally starts to start electronic type
The popularization and application of mutual inductor.
Conventional electromagnetic voltage transformer secondary output be 100V orCurrent Transformer Secondary output is 5A
Or 1A, and the sensing principle of electronic mutual inductor and the way of output are then entirely different, either ECT or EVT, generally its is secondary
Output signal is simulation small voltage (being less than 4V) or digital quantity, therefore suitable for the calibration method of conventional electromagnetic mutual inductor
It is no longer desirable for electronic mutual inductor, the domestic calibrating of electronic mutual inductor and magnitude tracing system at present are still blank, right
The verification of electronic mutual inductor ratio error and phase error directly influences the stabilization of digital transformer substation operation whether accurate
Property and safety.
For the ECT of simulation output, there are two types of the verification modes of domestic and international generally use：
It is a kind of similar with the difference of traditional current transformer verification principle, it is that a U/I conversion is added after tested ECT
Standard outputs it signal and is converted into the current signal consistent with traditional CT, but due to the secondary output voltage very little of ECT
(minimum 22.5mV), very big to 5A the and 1A difficulty that is converted into the secondary output of standard, there are the additional mistakes of amplifier element
Difference and capacity matching problem；
The second way is the verification mode measured based on direct voltage as shown in figure 5, it is advantageous that standard CT and waiting for
Bis- output signal sizes of ECT are surveyed without equal, but require two channels that must synchronize by the way of data sampling, otherwise can
There is the measurement error of phase.
For the ECT of numeral output, there are two types of the verification mode of domestic and international generally use is also the same：
A kind of method is to convert the numeral output of electronic mutual inductor to be measured through D/A, be converted into analog output signal with
The secondary output signal of simulation of standard mutual inductor is compared.The advantages of this method is can by the transformed analog signals of D/A
It is verified by the differential technique of conventional electromagnetic mutual inductor, cost is relatively low；But its difficult point, which is how accurately to measure, to be converted into
The phase error of analog signal contains the time of the links such as data sampling, A/D conversions, data processing, D/A conversions among these
Delay, it is most important that indistinguishable time delay is the response problem of mutual inductor itself or since the transformation of D/A is introduced
's.
Another method is that the simulation output of standard electromagnetic transformer is converted into digital signal through A/D converter, is calculated
Machine collects standardized digital signal, and the measuring signal of verified electronic mutual inductor is read in by interface, and survey is calculated by DFT
Measure the amplitude and phase of signal.The measurement of this mode is using the measurement method of absolute error, and this method is by A/D precision
The verification for being generally only capable of meeting the ratio error of 0.2 grade of electronic mutual inductor is influenced, simultaneously because time synchronization performance can not be true
Surely it traces to the source, so phase error is difficult to ensure measurement accuracy.
From the point of view of published patent, consider influence of the mains frequency fluctuation to inspection result, do not refer to yet how
Reduce the uncertainty of measurement result.
Invention content
The purpose of the present invention is to provide a kind of multi-function electronic transformer checking system and method for calibration, the system energy
It is enough 35Hz~65Hz in frequency fluctuation, keeps ratio difference 0.01%, phase difference increases substantially within 0.3 '
Phase measurement and checking precision meet the verification requirement of the electronic mutual inductor of 0.1S grades and following level.
Technical solution of the invention is as follows：
A kind of multi-function electronic transformer checking system includes the check system and digital mutual inductor of simulation mutual inductor
Two kinds of check system：
A kind of check system of simulation mutual inductor, feature are that its composition includes：Standard mutual inductor, Liang Tai
Agilent3458A digital multimeter, function generator, inductive voltage divider, standard I/V convert current divider and have electronic type mutual
The connection relation of the PC machine of sensor control software and software for calculation, each device is as follows：The secondary side of the standard mutual inductor
Standard I/V transformation current dividers are connect, output the first Agilent3458A digital multimeter of termination of standard I/V transformation current dividers
Input terminal, two HP3458A digital multimeter connect PC machine by GPIB-USB lines, and the function generator passes through GPIB-
USB is connected with the PC machine, and the function generator is connected with two Agilent3458A digital multimeter,
The input terminal of second Agilent3458A digital multimeter connects the secondary output end of to-be-tested transformer.
A kind of check system of digital mutual inductor, feature are that its composition includes：Standard mutual inductor, the first Agilent
3458A digital multimeter, function generator, inductive voltage divider, standard I/V convert current divider and with electronic mutual inductor controls
The connection relation of the PC machine of software and software for calculation, each device is as follows：The secondary side of the standard mutual inductor meets standard I/V
Convert current divider, the input terminal of output the first HP 3458A digital multimeter of termination of standard I/V transformation current dividers, the first HP
3458A digital multimeter connects PC machine by GPIB-USB lines, and the function generator passes through GPIB-USB and the PC
Machine is connected, and the function generator is connected with the first Agilent3458A digital multimeter, to-be-tested transformer
Tested combining unit is connected with the PC machine.
The method that simulation mutual inductor to be measured is verified using the check system of simulation mutual inductor, is included 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, mark
The primary current end of quasi- mutual inductor and to-be-tested transformer is connected, and the secondary side of standard mutual inductor connects standard I/V transformation current dividers；When
When mutual inductor to be measured is voltage transformer, the primary voltage end of standard mutual inductor and to-be-tested transformer is in parallel, standard mutual inductor
Secondary side connect inductive voltage divider, the signal generator receives the synchronized sampling order that PC machine is sent out, two 3458A numbers
Multimeter starts to synchronize, respectively the secondary output of standard for manual sampling mutual inductor and to-be-tested transformer；
2) startup program is initialized；
3) whether successful connection continues in next step, otherwise to terminate, inspection apparatus determining program if successful connection
Whether connecting line connects；
4) Agilent 3458A and Agilent33250 parameters are configured；
5) PC machine described in sends out single to Agilent 3458A and enables useful signal；
6) PC machine captures data from Ethernet interface, judges that packet capturing success is no, success just carries out next step, otherwise returns to the
5) step；
7) PC machine reads the data of Agilent 3458A；
8) modified quasi-synchronous algorithm calculating frequency difference and frequency, determination frequency is utilized to be provided whether in prescribed limit
Except, it is believed that wrong point returns to the 4) step；
9) PC machine calculating ratio value difference and phase difference, the amplitude A1 and phase of standard mutual inductorThe amplitude of tested mutual inductor
A2 and phaseThe ratio difference calculation formula isThe calculation formula of the phase difference is
10) result is shown；
11) judge whether verification terminates, be not over and return to the 4th step.
The method that digital mutual inductor to be measured is verified using the check system of digital mutual inductor, is included the following steps：
1) according to the transformation ratio selection standard mutual inductor of to-be-tested transformer, when it is to be measured be current transformer when, standard mutual inductor
It connects with the primary current end of to-be-tested transformer, the secondary side of standard mutual inductor connects standard I/V transformation current dividers；When mutual inductance to be measured
When device is voltage transformer, the primary voltage end of standard mutual inductor and to-be-tested transformer is in parallel, selects the two of standard mutual inductor
Secondary side connects inductive voltage divider, and the synchronization pulse that synchronizing device is sent out is exported respectively to the tested conjunction of electronic mutual inductor to be measured
And unit and Agilent33250A signal generators, under the action of this lock-out pulse, the standard mutual inductor secondary side
First Agilent3458A digital multimeter and the tested combining unit of the to-be-tested transformer secondary side start synchronize adopt
Sample；
2) startup program is initialized；
3) whether successful connection continues in next step, otherwise to terminate, inspection apparatus determining program if successful connection
Whether connecting line connects；
4) Agilent 3458A and Agilent33250 parameters are configured；
5) PC machine described in sends out single to Agilent 3458A and enables useful signal；
6) PC machine captures from Ethernet interface and is detected combining unit data, judges that packet capturing success is no, successful with regard to carrying out in next step,
Otherwise the 5) step is returned to；
7) PC machine reads the data of Agilent 3458A；
8) modified quasi-synchronous algorithm calculating frequency difference and frequency, determination frequency is utilized to be provided whether in prescribed limit
Except, it is believed that wrong point returns to the 4) step；
9) PC machine calculating ratio value difference and phase difference, the amplitude A1 and phase of standard mutual inductorThe amplitude of tested mutual inductor
A2 and phaseThe ratio difference calculation formula isThe calculation formula of the phase difference is
10) result is shown；
11) judge whether verification terminates, be not over and return to the 5) step.
The operation principle of the present invention：
The electronic mutual inductor of analog output：Two Agilent3458A digital multimeter standard for manual sampling source and wait for respectively
Transducer signal is surveyed, digital signal is converted into, then PC machine reads the data of two digital multimeter (Agilent 3458A)；
The electronic mutual inductor of digital output：Agilent3458A digital multimeter standard for manual sampling source signals are detected and close
And unit acquires to-be-tested transformer signal, and PC machine is passed to by Ethernet；
When PC machine acquisition two paths of signals, the frequency of standard source signal is first calculated, the width of two paths of signals is then calculated separately
Value and phase, then calculate ratio difference and the phase difference by school mutual inductor and standard mutual inductor, and preserve.
The features of the present invention and technique effect：
The present invention possesses normalized current, voltage transformer interface, and electronic current, (Ethernet connects voltage transformer interface
Mouthful, USB interface).The present invention is to be compared standard mutual inductor with by school mutual inductor, is calculated by school mutual inductor by algorithm
With ratio difference, phase difference, the respective phase and amplitude of frequency instrument of standard mutual inductor, check results are recorded.
The present invention as needed carries out instrument by the mating program of PC machine using the design philosophy of virtual instrument
Parameter configuration completes the synchronization that an important link of whole system is exactly two paths of signals in this way.
The present invention is capable of electronic type voltage transformer, the current transformer of the output of calibration mode analog quantity, the electricity of digital output
The ratio difference of the various types and the electronic mutual inductor of various ranks such as minor voltage transformer, current transformer verification, phase
The amplitude and phase calculation of difference, frequency and two paths of signals.In operating mode complexity, the big power grid of frequency fluctuation, still it disclosure satisfy that
Verification requires.
Description of the drawings
Fig. 1 is the electronic type transformer checking system structure chart of analog output of the present invention.
Fig. 2 is the electronic type transformer checking system structure chart 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
Specific implementation mode
The present invention relates to the checking electronic type transformers of multi-function electronic transformer checking system, including analog output
System such as Fig. 1, including standard mutual inductor, as standard source signal；To-be-tested transformer, for providing tested signal；Two
Agilent3458A digital multimeter, for distinguishing standard for manual sampling transducer signal and to-be-tested transformer signal；Agilent
33250 function signal generators, the trigger signal for receiving software kit send out trigger pulse triggers Agilent 3458A；
GPIB-USB lines, for connecting PC machine and Agilent 3458A digital multimeter and 33250 function generators of Agilent；Match
Set software is mainly used for that instrument is arranged, and receives data, handles data, shows the important results such as ratio difference and phase difference.
The electronic type transformer checking system of digital output such as Fig. 2, including standard mutual inductor, as standard source signal；
To-be-tested transformer, for providing tested signal；One Agilent 3458A digital multimeter is used for standard for manual sampling source signal；
33250 function generators of Agilent, the trigger signal for receiving synchronizing device send out trigger pulse triggers
Agilent3458A；GPIB-USB lines are sent out for connecting PC machine and HP3458A digital multimeter with 33250 functions of Agilent
Raw device；Software kit is mainly used for that instrument is arranged, and receives data, handles data, shows the important results such as ratio difference and phase difference.
PC machine：
The PC machine of the needs of the present invention should include USB interface, Ethernet interface, USB interface realization PC machine software kit
It being communicated with instrument (Agilent3458A, Agilent33250), Ethernet interface realizes that PC machine is communicated with tested combining unit,
(electric ethernet device can be turned by optical Ethernet, Ethernet data is converted into the data that PC machine can be obtained from network interface, this
Sample PC machine only needs to include USB interface, RJ45 network interfaces).
PC machine software kit of the present invention use virtual instrument design philosophy, this control program include instrument parameter configuration,
Checking algorithm, calibration tails, ratio difference and phase difference show that frequency calculates, and image is shown.
The electronic mutual inductor program flow diagram of PC machine software kit analog output is as shown in figure 3, detailed process is as follows：
1) according to the transformation ratio selection standard mutual inductor of to-be-tested transformer, when mutual inductor to be measured is current transformer, mark
The primary current end of quasi- mutual inductor and to-be-tested transformer is connected, and the secondary side of standard mutual inductor connects standard I/V transformation current dividers；When
When mutual inductor to be measured is voltage transformer, the primary voltage end of standard mutual inductor and to-be-tested transformer is in parallel, standard mutual inductor
Secondary side connect inductive voltage divider, the signal generator receives the synchronized sampling order that PC machine is sent out, two 3458A numbers
Multimeter starts to synchronize, respectively the secondary output of standard for manual sampling mutual inductor and to-be-tested transformer；
2) startup program is initialized；
3) whether successful connection continues in next step, otherwise to terminate, inspection apparatus determining program if successful connection
Whether connecting line connects；
4) Agilent 3458A and Agilent33250 parameters are configured；
5) PC machine described in sends out single to Agilent 3458A and enables useful signal；
6) PC machine captures data from Ethernet interface, judges that packet capturing success is no, success just carries out next step, otherwise returns to the
5) step；
7) PC machine reads the data of Agilent 3458A；
8) modified quasi-synchronous algorithm calculating frequency difference and frequency, determination frequency is utilized to be provided whether in prescribed limit
Except, it is believed that wrong point returns to the 4) step；
9) PC machine calculating ratio value difference and phase difference, the amplitude A1 and phase of standard mutual inductorThe amplitude of tested mutual inductor
A2 and phaseThe ratio difference calculation formula isThe calculation formula of the phase difference is
10) result is shown；
11) judge whether verification terminates, be not over and return to the 5) step.
The electronic mutual inductor program flow diagram of PC machine software kit digital output is as shown in figure 4, detailed process is as follows：
1) mode of connection of to-be-tested transformer is as shown in Fig. 2, the transformation ratio selection standard according to to-be-tested transformer is mutual when measuring
Sensor, when it is to be measured be current transformer when, standard mutual inductor and to-be-tested transformer primary current end series connection, standard mutual inductor
Secondary side connects standard I/V transformation current dividers；When to-be-tested transformer is voltage transformer, standard mutual inductor and to-be-tested transformer
Primary voltage end is in parallel, and the secondary side in standard mutual inductor is selected to connect inductive voltage divider, the lock-out pulse letter that synchronizing device is sent out
It number is exported respectively to the tested combining unit and 33250A signal generators of electronic mutual inductor to be measured, synchronizes pulse per second (PPS) herein
The 3458A and electronic mutual inductor to be measured of the lower standard mutual inductor secondary side of effect start synchronized sampling.
2) startup program is initialized；
3) whether successful connection continues in next step, otherwise to terminate, inspection apparatus determining program if successful connection
Whether connecting line connects；
4) Agilent 3458A and Agilent33250 parameters are configured；
5) it sends out single to Agilent 3458A and enables useful signal；
6) PC machine captures from Ethernet interface and is detected combining unit data, judges that packet capturing success is no, successful with regard to carrying out in next step,
Otherwise the 5) step is returned to；
7) PC machine reads the data of Agilent 3458A；
8) PC machine calculates frequency difference and frequency using modified quasi-synchronous algorithm, determination frequency whether in prescribed limit,
Except regulation, it is believed that wrong point returns to the 5) step；
9) amplitude and phase of PC machine calculating ratio value difference and phase difference, standard mutual inductor and tested mutual inductor；
According to the sampled data for the separate unit 3458A that PC machine is read, and capture from Ethernet interface by to-be-tested transformer
The sampled data that tested combining unit is sent is calculated respective by the nominal transformation ratio of standard mutual inductor and to-be-tested transformer respectively
Amplitude A1, A2 and initial phaseWithRatio difference calculation formulaThe calculation formula of phase difference is
10) result is shown；
11) judge whether verification terminates, be not over and return to the 5) step.
The function and performance of the present invention includes following aspects：
1. the present apparatus is capable of current electrons formula mutual inductor, the voltage electronic formula mutual inductor of the output of calibration mode analog quantity, digital quantity
Current electrons formula mutual inductor, the voltage electronic formula mutual inductor of output；
2. the electronic mutual inductor interface signal range of analog output is configured according to mutual inductor model；
3. the transport protocol of the electronic mutual inductor of digital output meets IEC61850-9-1, IEC61850-9-2 and
Format specified in IEC61850-9-2LE；
4. present apparatus PC machine software kit uses the design method of virtual instrument, interface to have configuration Agilent3458A, and
The parameter setting of Agilent 33250A passes through modified quasi-synchronous algorithm calculating ratio value difference, phase difference, frequency, amplitude and phase
Position, and show；Also show check results, the waveform of standard signal and tested signal simultaneously.
5. can flexible configuration signal range, sample frequency, verification number, standard no-load voltage ratio and tested no-load voltage ratio as needed；
6. the present apparatus can reach ratio difference 0.01% in frequency within the scope of 35~65Hz, phase difference 0.3 ' it
It is interior.
Claims (2)
1. a kind of multi-function electronic transformer checking system is characterized in that its composition includes：Standard current transformer, standard electric
Mutual inductor, two Agilent 3458A digital multimeter, signal generator, inductive voltage dividers, standard I/V is pressed to convert current divider
With the PC machine with electronic mutual inductor control software and software for calculation, which has electric current, electricity
The a variety of verifying functions of pressure, analog output, digital output；
When calibrating die analog quantity output type electronic mutual inductor, the secondary side of the standard current transformer meets standard I/V and becomes
Current divider is changed, the secondary side of the standard potential transformer connects inductive voltage divider, standard I/V transformation current dividers or induction point
The input terminal of the output termination First Agilent 3458A digital multimeter of depressor, two Agilent 3458A digital versatiles
Table is connected to PC machine, the input termination of second Agilent3458A digital multimeter with signal generator by GPIB-USB lines
The secondary output end of to-be-tested transformer, includes 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, standard is mutual
The primary current end of sensor and to-be-tested transformer is connected, and the secondary side of standard mutual inductor connects standard I/V transformation current dividers；When to be measured
Mutual inductor when being voltage transformer, the primary voltage end of standard mutual inductor and to-be-tested transformer is in parallel, the two of standard mutual inductor
Secondary side connects inductive voltage divider, and the signal generator receives the synchronized sampling order that PC machine is sent out, two Agilent 3458A
Digital multimeter starts to synchronize, respectively the secondary output of standard for manual sampling mutual inductor and to-be-tested transformer；
2) startup program is initialized；
3) whether successful connection continues in next step, otherwise to terminate, inspection apparatus connection determining program if successful connection
Whether line connects；
4) Agilent 3458A digital multimeter and 33250 signal generator parameters of Agilent are configured；
5) PC machine described in sends out single to Agilent 3458A digital multimeter and enables useful signal；
6) PC machine captures data from Ethernet interface, judges that packet capturing success is no, success just carries out next step, otherwise returns to the 5)
Step；
7) PC machine reads the data of two Agilent 3458A digital multimeter；
8) modified quasi-synchronous algorithm is utilized to calculate frequency difference and frequency, whether determination frequency is in prescribed limit, except regulation,
Think wrong point, returns to the 4) step；
9) PC machine calculating ratio value difference and phase difference, the amplitude A1 and phase of standard mutual inductorThe amplitude A2 of tested mutual inductor and
PhaseThe ratio difference calculation formula isThe calculation formula of the phase difference is
10) result is shown；
11) judge whether verification terminates, be not over and return to the 5) step.
2. multi-function electronic transformer checking system as described in claim 1, it is characterised in that can be used for check digit amount
Electronic mutual inductor is exported, method of calibration includes the following steps：
The secondary side of the standard mutual inductor is met into standard I/V and converts current divider, the standard potential transformer it is secondary
Side connects inductive voltage divider, and the output of standard I/V transformation current dividers or inductive voltage divider terminates First Agilent 3458A numbers
The input terminal of word multimeter, First Agilent 3458A digital multimeter are connect with signal generator by GPIB-USB lines
The combining unit digital output of PC machine, to-be-tested transformer is connected with the PC machine；
1) according to the transformation ratio selection standard mutual inductor of to-be-tested transformer, when it is to be measured be current transformer when, standard mutual inductor and wait for
The primary current end series connection of mutual inductor is surveyed, the secondary side of standard mutual inductor connects standard I/V transformation current dividers；When to-be-tested transformer is
When voltage transformer, the primary voltage end of standard mutual inductor and to-be-tested transformer is in parallel, selects the secondary side in standard mutual inductor
Inductive voltage divider is connect, the synchronization pulse that synchronizing device is sent out is exported respectively to the tested merging list of electronic mutual inductor to be measured
Member and signal generator, under the action of this lock-out pulse, the First Agilent of the standard mutual inductor secondary side
3458A digital multimeter and the tested combining unit of the to-be-tested transformer secondary side start synchronized sampling；
2) startup program is initialized；
3) whether successful connection continues in next step, otherwise to terminate, inspection apparatus connection determining program if successful connection
Whether line connects；
4) parameter of Agilent 3458A digital multimeter and signal generator is configured；
5) PC machine described in sends out single to Agilent 3458A digital multimeter and enables useful signal；
6) PC machine captures from Ethernet interface and is detected combining unit data, judges that packet capturing success is no, in next step, otherwise success is with regard to carrying out
Return to the 5) step；
7) PC machine reads the data of Agilent 3458A digital multimeter；
8) modified quasi-synchronous algorithm is utilized to calculate frequency difference and frequency, whether determination frequency is in prescribed limit, except regulation,
Think wrong point, returns to the 5) step；
9) PC machine calculating ratio value difference and phase difference, the amplitude A1 and phase of standard mutual inductorThe amplitude A2 of tested mutual inductor and
PhaseThe ratio difference calculation formula isThe calculation formula of the phase difference is
10) result is shown；
11) judge whether verification terminates, be not over and return to the 5) step.
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| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
Family Cites Families (5)
| 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 |
| CN101290345B (en) * | 2008-06-06 | 2010-10-13 | 北京浩霆光电技术有限责任公司 | Multifunctional mutual-inductor tester |
| 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 |
-
2014
- 2014-12-05 CN CN201410738648.9A patent/CN104391264B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 (1)
| Title |
|---|
| 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》.2012,(第7期), * |
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