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 PDF

Info

Publication number
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
Authority
CN
China
Prior art keywords
signal
time
current
source
voltage
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.)
Active
Application number
CN201510393922.8A
Other languages
Chinese (zh)
Other versions
CN104991221A (en
Inventor
毕伟
申莉
甘依依
舒开旗
刘建华
李帆
李俊
石洪
付威
郭雨
汪雪琼
郭子淳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Hubei Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Hubei Electric Power Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, Electric Power Research Institute of State Grid Hubei Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201510393922.8A priority Critical patent/CN104991221B/en
Publication of CN104991221A publication Critical patent/CN104991221A/en
Application granted granted Critical
Publication of CN104991221B publication Critical patent/CN104991221B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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

The device and detection method calibrated to the metering device in distributed transformer substation
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)

  1. 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. 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. 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.
CN201510393922.8A 2015-07-07 2015-07-07 The device and detection method calibrated to the metering device in distributed transformer substation Active CN104991221B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510393922.8A CN104991221B (en) 2015-07-07 2015-07-07 The device and detection method calibrated to the metering device in distributed transformer substation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510393922.8A CN104991221B (en) 2015-07-07 2015-07-07 The device and detection method calibrated to the metering device in distributed transformer substation

Publications (2)

Publication Number Publication Date
CN104991221A CN104991221A (en) 2015-10-21
CN104991221B true CN104991221B (en) 2018-01-30

Family

ID=54303057

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510393922.8A Active CN104991221B (en) 2015-07-07 2015-07-07 The device and detection method calibrated to the metering device in distributed transformer substation

Country Status (1)

Country Link
CN (1) CN104991221B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Family Cites Families (1)

* Cited by examiner, † Cited by third party
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
CN104991221A (en) 2015-10-21

Similar Documents

Publication Publication Date Title
CN104991221B (en) The device and detection method calibrated to the metering device in distributed transformer substation
CN101984538B (en) Data synchronization processing method for electronic mutual inductor using Manchester encoding
CN101498775B (en) Calibration apparatus for gate energy meter of digitized transforming plant
CN105203983A (en) Flexible alternating current/direct current electronic transformer checking device based on mixed sampling
CN103575971B (en) A kind of intelligent substation universal data collection method
CN104360298A (en) Performance test system and method for merging unit tester
CN104092738A (en) Long-distance nuclear phase system and method based on wireless Internet
CN205067713U (en) Flexible alternating current -direct current electronic transformer calibration equipment based on mix sampling
CN204439821U (en) A kind of numeral exports electronic transformer calibrator
CN101893695B (en) Analog sampling and protocol generating devices
CN105548947B (en) A kind of synchronous source tracing method of digitalized electrical energy meter and system
CN108287293A (en) A kind of method and system directly acquiring fault traveling wave
CN202256590U (en) Insulation on-line monitoring device for transformer bushing
CN110018435A (en) Electronic mutual inductor calibration system and calibration method
CN204705708U (en) To the device that the measuring apparatus in distributed transformer substation is calibrated
CN202815078U (en) Current measuring device
CN202600133U (en) Digital quantity input electric energy meter calibration system capable of supporting synchronous analog quantity source tracing
CN205121234U (en) Real -time synchronization data acquisition device
CN201740861U (en) Current transformer calibrator based on IEC 61850 standard
CN103036314A (en) Inserted electricity parameter sampling realization device based on time-base signals of compass navigation satellite system and global position system (GPS)
CN102621376A (en) Method for precisely and synchronously measuring multiple high and low-potential electric parameters and device
CN106125033B (en) A kind of voltage and current synchronism classification error testing system
RU147247U1 (en) MEASUREMENT DIGITAL FLOWS UNIT OF MEASUREMENT DATA
CN201788275U (en) Analog sampling and protocol generating device
CN213715328U (en) Big ground net ground connection impedance measurement device based on big dipper

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
CB03 Change of inventor or designer information
CB03 Change of inventor or designer information

Inventor after: Bi Wei

Inventor after: Guo Yu

Inventor after: Wang Xueqiong

Inventor after: Guo Zichun

Inventor after: Shen Li

Inventor after: Gan Yiyi

Inventor after: Shu Kaiqi

Inventor after: Liu Jianhua

Inventor after: Li Fan

Inventor after: Li Jun

Inventor after: Shi Hong

Inventor after: Fu Wei

Inventor before: Shen Li

Inventor before: Wang Sike

Inventor before: Bi Wei

Inventor before: Gan Yiyi

Inventor before: Shu Kaiqi

Inventor before: Li Jun

Inventor before: Li Fan

Inventor before: Guo Yu

Inventor before: Liu Heng

Inventor before: Zheng Xin

GR01 Patent grant
GR01 Patent grant