CN104991221B - The device and detection method calibrated to the metering device in distributed transformer substation - Google Patents
The device and detection method calibrated to the metering device in distributed transformer substation Download PDFInfo
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- CN104991221B CN104991221B CN201510393922.8A CN201510393922A CN104991221B CN 104991221 B CN104991221 B CN 104991221B CN 201510393922 A CN201510393922 A CN 201510393922A CN 104991221 B CN104991221 B CN 104991221B
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- 238000001514 detection method Methods 0.000 title claims abstract description 9
- 238000004891 communication Methods 0.000 claims abstract description 19
- 230000005611 electricity Effects 0.000 claims abstract description 19
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000005516 engineering process Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 15
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Abstract
The present invention provides device and the detection method that a kind of metering device in distributed transformer substation is calibrated, time standard current source is connected with current signal sending module, time standard voltage source is connected with voltage signal sending module, time standard current source connects combining unit with time standard voltage source, combining unit connects digital electricity meter, digital electricity meter connects electrical energy pulse acquisition equipment, electrical energy pulse acquisition equipment connects wireless communication module, reference power supply signal receiving module connects with current signal sending module and the communication of voltage signal sending module, wireless communication module and reference power supply signal receiving module are connected with PC, using GPS/ Big Dipper time service modes, time synchronized is realized using 1PPs pulse per second (PPS)s；Carried out data transmission using wireless communication technique, overcome due to the defects of voltage, current transformer spacing distance length can not pass through Data Over Cable；Using markers standard source technology, it is ensured that the synchronism of data.
Description
Technical field
The present invention relates to electric-power metering to examine and determine field, and in particular to a kind of metering device in distributed transformer substation is carried out
The device and detection method of calibration.
Background technology
With the automation of transformation substations and the rapid development of the network communications technology, the promulgation of IEC61850 standards systems and push away
OK, traditional transformer station is progressively to digital transformer substation transition.Digital transformer substation electric flux technology realizes in collection
Analog quantity is transferred to digital to the transformation after total digitalization, transmitted by fibre circuit by point-to-point or ether net mode
Electric energy meter, data source is provided for electric energy metered system in digital transformer substation, forms digital transformer substation electric energy metrical system
System.
However, in digital transformer substation electric energy metered system, due to voltage transformer, the error of current transformer, conjunction
And the transformed error of unit, the error code of transmitting procedure cause depositing for fearness error and digital electric energy meter calculation error etc. link
Electric energy metered system can produce certain systematic error in digital transformer substation, it is therefore desirable to the work(of digital transformer substation
Rate/electric energy error is calibrated.
The content of the invention
The present invention provides what a kind of metering device in distributed transformer substation was calibrated according to the deficiencies in the prior art
Device and detection method, it is simple in construction, it is easy to operate, accurately and reliably.
Technical scheme：The device that a kind of metering device in distributed transformer substation is calibrated, its feature
It is：Normalized current source and current data collector be connected and with GPS/ Big Dipper time service antenna makeup time normalized currents source,
Standard voltage source and voltage data collector are connected and marked with GPS/ Big Dipper time service antenna makeup time standard voltage sources, time
Quasi- current source is connected with current signal sending module, and time standard voltage source is connected with voltage signal sending module, time standard
Current source connects combining unit, combining unit connection digital electricity meter, digital electricity meter connection electric energy with time standard voltage source
Pulse capture device, electrical energy pulse acquisition equipment connection wireless communication module, reference power supply signal receiving module and current signal
Sending module and the communication connection of voltage signal sending module, wireless communication module and reference power supply signal receiving module connect with PC
Connect.
GPS/ Big Dipper time service antennas are also associated with the electrical energy pulse acquisition equipment.
The combining unit is connected with digital electricity meter by optical fiber.
The nanosecond of the time service precision of the GPS/ Big Dippeves time service antenna≤100.
The detection method that a kind of device described in is calibrated to the metering device in distributed transformer substation, its feature
It is：Comprise the following steps,
1) digital frequency synthesis technology is used, using GPS-1PPS as synchronizing signal, frequency synthesis phase reference signal, is used
DC digital frequency synthesis technique based on DSP, synthesis and the standard signal source of GPS second impulsive synchronization, target when output carries
Time standard current source and time standard voltage source；
2) it is single to be input to merging for the electric current and voltage analog signal of current signal collector and voltage signal collector collection
Member, combining unit convert analog signals into data signal and are transported to digital electricity meter by optical fiber；
3) digital electricity meter calculates electric flux by the data signal of reception and is electrical energy pulse by electric energy conversion, electricity
Energy impulse acquisition equipment captures electrical energy pulse and is sent to PC by wireless communication module；
4) PC passes through reference power supply signal receiving module receiving step 1) in when target time standard current source and
Time standard voltage source signal calculates electric flux, and the electric flux sent with electrical energy pulse acquisition equipment is compared, and calculates and misses
Difference, so as to realize the purpose that power/energy calibration is carried out to the metering device in distributed transformer substation.
The frequency adjustment method step of digital frequency synthesis technology is in the step 1)：
A. F (I)=A is pressed1*cos(360°*I/N+θ1)+A2*cos(2*360°*I/N+θ2)+……+Ancos(n*360°*
I/N+θn) to signal N equal portions, the amplitude of all discrete points of signal is calculated, and these amplitudes are arranged to deposit data field according to this,
As basic wave function；
B. give four-quadrant 16 multiplication DAC wave function by DSP, reduction obtains required analog signal；
C. inputted by changing DAC benchmark come adjusting signal amplitude, change the starting point Regulate signal of waveform at the beginning
Phase angle；
D. because of signal frequency f=fs/N, fs is sample frequency, and 1/ Δ fs is sampling time interval, and it is adjustable to change Δ fs
Save signal frequency.
The technique effect of the present invention：Using GPS/ Big Dipper time service modes, time synchronized is realized using 1PPs pulse per second (PPS)s；Using
Wireless communication technique carries out data transmission, and overcomes because voltage, current transformer spacing distance length can not pass through wire transmission
The defects of data；Using markers standard source technology, it is ensured that the synchronism of data；It is simple in construction, it is easy to operate, accurately and reliably.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present invention；
Fig. 2 is detection method flow chart.
Label represents respectively in figure：1-normalized current source, 2-current data collector, 3-time standard current source,
4-standard voltage source, 5-voltage data collector, 6-time standard voltage source, 7-current signal sending module, 8-voltage
Signal transmitting module, 9-combining unit, 10-digital electricity meter, 11-electrical energy pulse acquisition equipment, 12-wireless telecommunications mould
Block, 13-reference power supply signal receiving module, 14-PC.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings：
A kind of as shown in figure 1, device that metering device in distributed transformer substation is calibrated, it is characterised in that：Mark
Quasi- current source 1 and current data collector 2 be connected and with GPS/ Big Dipper time service antenna makeup time normalized currents source 3, standard
Voltage source 4 and voltage data collector 5 are connected and marked with GPS/ Big Dipper time service antenna makeup times standard voltage source 6, time
Quasi- current source 3 is connected with current signal sending module 7, and time standard voltage source 6 is connected with voltage signal sending module 8, the time
Normalized current source 3 and time standard voltage source 6 connect combining unit 9, and combining unit 9 connects digital electricity meter 10, digital electric energy
Table 10 connects electrical energy pulse acquisition equipment 11, and electrical energy pulse acquisition equipment 11 connects wireless communication module 12, reference power supply signal
Receiving module 13 connects with current signal sending module 7 and the communication of voltage signal sending module 8, wireless communication module 12 and standard
Power supply signal receiving module 13 is connected with PC 14.
GPS/ Big Dipper time service antennas are also associated with electrical energy pulse acquisition equipment 11.
Combining unit 9 is connected with digital electricity meter 10 by optical fiber.
The nanosecond of the time service precision of GPS/ Big Dipper time service antennas≤100.
A kind of as shown in Fig. 2 detection that device described in is calibrated to the metering device in distributed transformer substation
Method, it is characterised in that：Comprise the following steps,
1) digital frequency synthesis technology is used, using GPS-1PPS as synchronizing signal, frequency synthesis phase reference signal, is used
DC digital frequency synthesis technique based on DSP, synthesis and the standard signal source of GPS second impulsive synchronization, target when output carries
Time standard current source and time standard voltage source；
2) it is single to be input to merging for the electric current and voltage analog signal of current signal collector and voltage signal collector collection
Member, combining unit convert analog signals into data signal and are transported to digital electricity meter by optical fiber；
3) digital electricity meter calculates electric flux by the data signal of reception and is electrical energy pulse by electric energy conversion, electricity
Energy impulse acquisition equipment captures electrical energy pulse and is sent to PC by wireless communication module；
4) PC passes through reference power supply signal receiving module receiving step 1) in when target time standard current source and
Time standard voltage source signal calculates electric flux, and the electric flux sent with electrical energy pulse acquisition equipment is compared, and calculates and misses
Difference, so as to realize the purpose that power/energy calibration is carried out to the metering device in distributed transformer substation.
The frequency adjustment method step of digital frequency synthesis technology is in the step 1)：
A. F (I)=A is pressed1*cos(360°*I/N+θ1)+A2*cos(2*360°*I/N+θ2)+……+Ancos(n*360°*
I/N+θn) to signal N equal portions, the amplitude of all discrete points of signal is calculated, and these amplitudes are arranged to deposit data field according to this,
As basic wave function；
B. give four-quadrant 16 multiplication DAC wave function by DSP, reduction obtains required analog signal；
C. inputted by changing DAC benchmark come adjusting signal amplitude, change the starting point Regulate signal of waveform at the beginning
Phase angle；
D. because of signal frequency f=fs/N, fs is sample frequency, and 1/ Δ fs is sampling time interval, and it is adjustable to change Δ fs
Save signal frequency.
The device that a kind of metering device in distributed transformer substation of the present invention is calibrated, using GPS/ Big Dipper time services
Mode, time synchronized is realized using 1PPs pulse per second (PPS)s；Carried out data transmission using wireless communication technique, overcome due to voltage,
The defects of current transformer spacing distance length can not pass through Data Over Cable；Using markers standard source technology, it is ensured that data
Synchronism；It is simple in construction, it is easy to operate, accurately and reliably.
Claims (3)
- A kind of 1. device that metering device in distributed transformer substation is calibrated, it is characterised in that：Normalized current source (1) and Current data collector (2) be connected and with GPS/ Big Dipper time service antenna makeup time normalized current sources (3), standard voltage source (4) it is connected and is marked with GPS/ Big Dipper time service antenna makeup time standard voltage sources (6), time with voltage data collector (5) Quasi- current source (3) is connected with current signal sending module (7), and time standard voltage source (6) connects with voltage signal sending module (8) Connect, time standard current source (3) and time standard voltage source (6) connection combining unit (9), combining unit (9) connection numeral electricity Energy table (10), digital electricity meter (10) connection electrical energy pulse acquisition equipment (11), electrical energy pulse acquisition equipment (11) connection is wireless Communication module (12), reference power supply signal receiving module (13) and current signal sending module (7) and voltage signal sending module (8) communication connection, wireless communication module (12) and reference power supply signal receiving module (13) are connected with PC (14)；GPS/ Big Dipper time service antennas are also associated with the electrical energy pulse acquisition equipment (11)；The nanosecond of the time service precision of the GPS/ Big Dippeves time service antenna≤100.
- 2. the device that the metering device according to claim 1 in distributed transformer substation is calibrated, it is characterised in that： The combining unit (9) is connected with digital electricity meter (10) by optical fiber.
- 3. a kind of calibrated using any described device in claim 1-2 to the metering device in distributed transformer substation Detection method, it is characterised in that：Comprise the following steps,1) use digital frequency synthesis technology, using GPS-1PPS as synchronizing signal, frequency synthesis phase reference signal, using based on DSP DC digital frequency synthesis technique, synthesis and the standard signal source of GPS second impulsive synchronization, target time when output carries Normalized current source and time standard voltage source；2) electric current and voltage analog signal of current signal collector and voltage signal collector collection are input to combining unit, close And unit converts analog signals into data signal and is transported to digital electricity meter by optical fiber；3) digital electricity meter calculates electric flux by the data signal of reception and is electrical energy pulse by electric energy conversion, electric energy arteries and veins Rush acquisition equipment capture electrical energy pulse and PC is sent to by wireless communication module；4) PC passes through reference power supply signal receiving module receiving step 1) in when target time standard current source and time Standard voltage source signal of change goes out electric flux, and the electric flux sent with electrical energy pulse acquisition equipment is compared, calculation error, from And realize the purpose that power/energy calibration is carried out to the metering device in distributed transformer substation；The frequency adjustment method step of digital frequency synthesis technology is in the step 1)：A. F (I)=A is pressed1*cos(360°*I/N+θ1)+A2*cos(2*360°*I/N+θ2)+……+Ancos(n*360°*I/N+ θn) to signal N equal portions, the amplitude of all discrete points of signal is calculated, and these amplitudes are arranged in order deposit data field, as Basic wave function；B. give four-quadrant 16 multiplication DAC wave function by DSP, reduction obtains required analog signal；C. inputted by changing DAC benchmark come adjusting signal amplitude, change the phase angle at the beginning of the starting point Regulate signal of waveform；D. because of signal frequency f=fs/N, fs is sample frequency, and 1/ Δ fs is sampling time interval, changes the i.e. adjustable letters of Δ fs Number frequency.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510393922.8A CN104991221B (en) | 2015-07-07 | 2015-07-07 | The device and detection method calibrated to the metering device in distributed transformer substation |
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|---|---|---|---|
| CN201510393922.8A CN104991221B (en) | 2015-07-07 | 2015-07-07 | The device and detection method calibrated to the metering device in distributed transformer substation |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105842649A (en) * | 2016-03-25 | 2016-08-10 | 国家电网公司 | On-line detection system for secondary side power metering system of smart substation and detection method thereof |
| CN105954705A (en) * | 2016-07-06 | 2016-09-21 | 国网上海市电力公司 | Digital electric energy measuring equipment remote calibration system and method |
| CN106199489A (en) * | 2016-07-06 | 2016-12-07 | 国网上海市电力公司 | Laboratory reproduction type digitalized electric energy measuring equipment remote calibration system and method |
| CN110146762A (en) * | 2019-06-05 | 2019-08-20 | 国网江苏省电力有限公司苏州供电分公司 | A kind of detachable loading tests device suitable for intelligent substation |
| CN110940854B (en) * | 2019-11-14 | 2022-04-12 | 国网江西省电力有限公司电力科学研究院 | Alternating current synchronous electric energy metering system based on Beidou/GPS clock |
| CN110736957B (en) * | 2019-12-12 | 2020-03-27 | 国网江西省电力有限公司电力科学研究院 | Online detection system and method for electric energy metering device based on clock synchronization |
| CN111665377B (en) * | 2020-06-05 | 2023-05-05 | 国网福建省电力有限公司 | Remote phase-locked synchronous standard source |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035261A (en) * | 2010-12-17 | 2011-04-27 | 清华大学 | Monitoring system for smart grid |
| CN104198980A (en) * | 2014-08-29 | 2014-12-10 | 国家电网公司 | Accuracy evaluation system for digital electric energy meter |
| CN104330765A (en) * | 2014-11-12 | 2015-02-04 | 成都天兴电气有限公司 | Satellite navigation system based electric-energy-meter field calibration device |
| CN204705708U (en) * | 2015-07-07 | 2015-10-14 | 国家电网公司 | To the device that the measuring apparatus in distributed transformer substation is calibrated |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9330563B2 (en) * | 2013-02-12 | 2016-05-03 | Digimarc Corporation | Synchronized metrology in power generation and distribution networks |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035261A (en) * | 2010-12-17 | 2011-04-27 | 清华大学 | Monitoring system for smart grid |
| CN104198980A (en) * | 2014-08-29 | 2014-12-10 | 国家电网公司 | Accuracy evaluation system for digital electric energy meter |
| CN104330765A (en) * | 2014-11-12 | 2015-02-04 | 成都天兴电气有限公司 | Satellite navigation system based electric-energy-meter field calibration device |
| CN204705708U (en) * | 2015-07-07 | 2015-10-14 | 国家电网公司 | To the device that the measuring apparatus in distributed transformer substation is calibrated |
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