CN103605105B - Calibration device for digital electric energy meter of intelligent substation - Google Patents
Calibration device for digital electric energy meter of intelligent substation Download PDFInfo
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- 239000013307 optical fiber Substances 0.000 claims description 23
- 230000009977 dual effect Effects 0.000 claims description 16
- 238000012795 verification Methods 0.000 abstract description 12
- 238000001514 detection method Methods 0.000 abstract description 7
- 239000000835 fiber Substances 0.000 abstract description 7
- 238000007726 management method Methods 0.000 description 23
- 238000012360 testing method Methods 0.000 description 17
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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- G—PHYSICS
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- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
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Abstract
The invention provides a kind of calibration device for digital electric energy meter of intelligent substation, comprise main control unit, high-speed data processing unit, network management unit, FPGA unit, touch display screen, push-button unit and Power Management Unit; Main control unit is electrically connected with high-speed data processing unit, touch display screen two-way signaling respectively; Main control unit is electrically connected with push-button unit signal; High-speed data processing unit is also electrically connected with network management unit, FPGA unit two-way signaling respectively; Power Management Unit is used for providing working power.Multicore architecture of the present invention, for detection check real-time high-efficiency and accuracy of detection is high, operation interface is friendly, rich interface, the on-the-spot access of verification is convenient, time saving and energy saving, cannot the problem of incoming fiber optic digital signal simultaneously when solving the calibrating of on-the-spot real load, structure is simple, cost is lower and easy to use.
Description
Technical field
The present invention relates to the intelligent substation gauge check technical field of electric power system, be specifically related to a kind of digitalized electrical energy meter calibration equipment that the three phase electronic multifunctional electric energy meter of the intelligent substation based on IEC6185 standard is examined and determine and tested.
Background technology
Intelligent substation is the important step that intelligent grid is built, transformer station's digitizing, intellectuality has become a kind of trend, digital transformer substation is different from traditional transformer station, its framework is in IEC61850 standard base, adopt the three-decker of process layer, wall and station level, all electrical measurements pass to process layer or bay device by fiber optic Ethernet all change into the digital signal meeting IEC618509-1,9-2 agreement at process layer after.Need in intelligent substation to use the more digitalized electrical energy meter for measuring, its digital electricity meter used all needs to verify its error etc. in laboratory and when being arranged on intelligent substation reality load operation.Traditional electric energy meter has relatively ripe calibration equipment and more complete vertification regulation and method; And digitalized electrical energy meter is compared with traditional ammeter, its measuring principle and method all there occurs larger change, it is no longer traditional dependence analog acquisition, but complete function of measuring based on the collection by digitized signal under IEC61850 standard architecture, and realize communication by the modes such as network and miscellaneous equipment (as background computer system).At present, verification pick-up unit or the instrument of the relative maturity of high precision test verification particularly can be carried out preferably at the scene under real load condition in laboratory to digitalized electrical energy meter, still rare.
Summary of the invention
The object of the invention is: calibration device for digital electric energy meter of intelligent substation convenient and fast connection when providing that a kind of structure is simple, cost is lower, rich interface, accuracy of detection are high and use.
Technical scheme of the present invention is: calibration device for digital electric energy meter of intelligent substation of the present invention, and its design feature is: comprise main control unit, high-speed data processing unit, network management unit, FPGA unit, touch display screen, push-button unit and Power Management Unit;
Main control unit is provided with the first communication ends, second communication end, display end and push button signalling input end; High-speed data processing unit is provided with the first to the 5th communication ends; Network management unit is provided with data signal communication end and control signal communication ends; FPGA unit is provided with data communication end; Touch display screen is provided with display end; Push-button unit is provided with signal output part;
First communication ends of main control unit is electrically connected with the first communication ends two-way signaling of high-speed data processing unit; The second communication end of main control unit is electrically connected with the second communication end two-way signaling of high-speed data processing unit; The display end of main control unit is electrically connected with the display end two-way signaling of touch display screen; The push button signalling input end of main control unit is electrically connected with the signal output part signal of push-button unit; The third communication end of high-speed data processing unit is electrically connected with the data signal communication end two-way signaling of network management unit; 4th communication ends of high-speed data processing unit is electrically connected with the control signal communication ends two-way signaling of network management unit; 5th communication ends of high-speed data processing unit is electrically connected with the data communication end two-way signaling of FPGA unit; Power Management Unit is used for providing working power;
Above-mentioned main control unit comprises CPU module, flash memory module, SDRAM module, clock module, Network Interface Module, communication interface modules, usb interface module, display module and dual port RAM module; CPU module is provided with communication ends and button signal input end; Display module and dual port RAM module are provided with the first communication ends and second communication end respectively;
The flash memory module of main control unit, SDRAM module, clock module, Network Interface Module, communication interface modules and usb interface module are electrically connected with CPU module two-way signaling respectively; First communication ends of display module, the first communication ends of dual port RAM module are electrically connected with CPU module two-way signaling respectively;
The communication ends of CPU module is the first communication ends of main control unit; The second communication end of dual port RAM module is the second communication end of main control unit; The button signal input end of CPU module is the push button signalling input end of main control unit; The second communication end of display module is the display end of main control unit.
Further scheme is: above-mentioned high-speed data processing unit comprises the 32 bit DSP chips that model is ADSP-BF518, and dominant frequency is 400MHz.
Further scheme is: above-mentioned network management unit is provided with ST optical fiber interface, SC optical fiber interface and RJ45 interface; Wherein, ST optical fiber interface and SC optical fiber interface are respectively provided with 2 respectively; RJ45 interface is provided with 3.
Further scheme also has: above-mentioned FPGA unit is provided with high-frequency impulse output interface, ammeter Puled input interface and FT3 data-interface.
The present invention has positive effect: (1) calibration device for digital electric energy meter of intelligent substation of the present invention, adopt the multicore architecture of the processing data information of main control unit, high-speed data processing unit and FPGA unit, for guaranteeing the detection real-time high-efficiency of device to digitalized electrical energy meter during real-time detection check, and accuracy of detection is high.(2) calibration device for digital electric energy meter of intelligent substation of the present invention, main control unit, by arranging network interface, communicates conveniently with backstage host computer during use; USB interface, RS232 communication interface are set, connect peripheral hardware convenient.(3) calibration device for digital electric energy meter of intelligent substation of the present invention, network management unit 3 is provided with ST optical fiber interface 31, SC optical fiber interface 32 and RJ45 interface 33, facilitate on-the-spot in verification and different fiber interface and network interface access, and after verification scene need not be arrived, carry out the conversion of interface again, time saving and energy saving; Meanwhile, when solving the calibrating of on-the-spot real load cannot the problem of incoming fiber optic digital signal simultaneously: traditional field-checking can connect tester and electric energy meter, the voltage of sampling circuit, current signal detect simultaneously.Generally that merge cells point-to-point 61850 messages are to digitalized electrical energy meter in digital transformer substation, merge cells seldom has reserved test designated lane for on-site proving, the present invention passes through network management unit, the data-signal that merge cells is sent synchronously is forwarded by many mouthfuls, realize calibration equipment and digitalized electrical energy meter synchronously obtains data, thus can dynamic precision test under tested ammeter locality realizes real load.(4) calibration device for digital electric energy meter of intelligent substation of the present invention, by the setting of touch display screen and push-button unit, makes operation and control interface friendly, easy to use.
(5) calibration device for digital electric energy meter of intelligent substation of the present invention, structure is relatively simple, and cost is lower.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Reference numeral in above-mentioned accompanying drawing is as follows:
Main control unit 1, CPU module 11, flash memory module 12, SDRAM module 13, clock module 14, Network Interface Module 15, communication interface modules 16, usb interface module 17, display module 18, dual port RAM module 19,
High-speed data processing unit 2,
Network management unit 3, ST optical fiber interface 31, SC optical fiber interface 32, RJ45 interface 33,
FPGA unit 4, high-frequency impulse output interface 41, ammeter Puled input interface 42, FT3 data-interface 43,
Touch display screen 5,
Push-button unit 6,
Power Management Unit 7.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
(embodiment 1)
See Fig. 1, the calibration device for digital electric energy meter of intelligent substation of the present embodiment, form primarily of main control unit 1, high-speed data processing unit 2, network management unit 3, FPGA unit 4, touch display screen 5, push-button unit 6 and Power Management Unit 7.
Main control unit 1 is provided with the first communication ends, second communication end, display end and push button signalling input end; High-speed data processing unit 2 is provided with the first to the 5th communication ends; Network management unit 3 is provided with data signal communication end and control signal communication ends; FPGA unit 4 is provided with data communication end; Touch display screen 5 is provided with display end; Push-button unit 6 is provided with signal output part.
First communication ends of main control unit 1 is electrically connected with the first communication ends two-way signaling of high-speed data processing unit 2; The second communication end of main control unit 1 is electrically connected with the second communication end two-way signaling of high-speed data processing unit 2; The display end of main control unit 1 is electrically connected with the display end two-way signaling of touch display screen 5; The push button signalling input end of main control unit 1 is electrically connected with the signal output part signal of push-button unit 6; The third communication end of high-speed data processing unit 2 is electrically connected with the data signal communication end two-way signaling of network management unit 3; 4th communication ends of high-speed data processing unit 2 is electrically connected with the control signal communication ends two-way signaling of network management unit 3; 5th communication ends of high-speed data processing unit 2 is electrically connected with the data communication end two-way signaling of FPGA unit 4; Power Management Unit 7 provides working power for each unit.
Main control unit 1 forms primarily of CPU module 11, flash memory module 12, SDRAM module 13, clock module 14, Network Interface Module 15, communication interface modules 16, usb interface module 17, display module 18 and dual port RAM module 19.CPU module 11 is provided with communication ends and button signal input end; Display module 18 and dual port RAM module 19 are provided with the first communication ends and second communication end respectively.
The flash memory module 12 of main control unit 1, SDRAM module 13, clock module 14, Network Interface Module 15, communication interface modules 16 and usb interface module 17 are electrically connected with CPU module 11 two-way signaling respectively; First communication ends of display module 18, the first communication ends of dual port RAM module 19 are electrically connected with CPU module 11 two-way signaling respectively.
The communication ends of CPU module 11 is the first communication ends of main control unit 1; The second communication end of dual port RAM module 19 is the second communication end of main control unit 1; The button signal input end of CPU module 11 is the push button signalling input end of main control unit 1; The second communication end of display module 18 is the display end of main control unit 1.
The core processing device of the CPU module 11 of main control unit 1 is the ARM9 microprocessor of dominant frequency 200MHz, and its serial port is as the first communication ends of main control unit 1.Flash memory module 12 preferably adopts NORFlash flash chip, and it is for storing the information data such as testing scheme, test result form of basic parameter, configuration.SDRAM module 13 stores for data and acceptance is called.Clock module 14 provides clock signal for CPU module 11.Network Interface Module 15 preferably adopts RJ45 network interface, its can be used for realizing and host computer communication and be connected support IEC61850 standard the digitalized electrical energy meter of uploading data function to carry out model measurement and data call survey together.Communication interface modules 16 is provided with RS232 service port, is used for safeguarding equipment.Usb interface module 17 realizes the access of importing and exporting of data and the equipment such as keyboard, mouse for connecing USB flash disk.Display module 18 is for driving touch display screen and realizing information interaction.One end of dual port RAM module 19 is electrically connected with CPU module 11 two-way signaling, the other end of dual port RAM module 19 is the second communication end of main control unit 1, and dual port RAM module 19 is for realizing the communication of the big data quantity between the CPU module 11 of main control unit 1 and high-speed data processing unit 2.
High-speed data processing unit 2 is for carrying out data processing.In the present embodiment, high-speed data processing unit 2 preferably employing model is the 32 bit DSP chips of ADSP-BF518, and dominant frequency is 400MHz.
Network management unit 3 is for realizing synchronized transmission and receiving from the data message of heterogeneous networks interface and the data retransmission of different passage and identification.Network management unit 3 is provided with ST optical fiber interface 31, SC optical fiber interface 32 and RJ45 interface 33, and wherein, ST optical fiber interface 31 and SC optical fiber interface 32 are respectively provided with 2 respectively; RJ45 interface 33 is provided with 3.By the setting of the various interfaces of network element 3, facilitate on-the-spot in verification and different fiber interface and network interface access, and after verification scene need not be arrived, carry out the conversion of interface again, time saving and energy saving.
FPGA unit 4, for realizing the output of high-frequency impulse and the input of tested digitalized electrical energy meter pulse and the Code And Decode of signal capture and signal.FPGA unit 4 is provided with high-frequency impulse output interface 41, ammeter Puled input interface 42 and FT3 data-interface 43.Wherein, high-frequency impulse output interface 41 export 1 tunnel gain merit pulse export and the idle pulse in 1 road; When ammeter Puled input interface 42 uses, the meritorious pulse of digitalized electrical energy meter and idle pulse are surveyed in reception; FT3 data-interface 43 is sent into signal or send FPGA and carries out decoding and coded treatment.
So-called FPGA, refers to field programmable gate array.So-called FT3, refers to a kind of transmission frame format of link layer, is the frame format that IEC60044-8 electronic current mutual inductor standard specifies to use.
Touch display screen 5 preferably adopts 7 inch color touch LCDs, its input for parameter configuration and the display of relevant information.
Push-button unit 6 is made up of 8 function buttons.The effect of push-button unit 6 realizes parameter configuration and control as the supplementary means of touch display screen 5.
Power Management Unit 7 is for providing corresponding working power for each unit of this device, each module.
(application examples)
The calibration device for digital electric energy meter of intelligent substation of previous embodiment 1, for carrying out the calibrating verification of precision and other function under the real load in laboratory and scene to digital quantity input electric energy meter.
When laboratory verification, main control unit 1 is connected by touch display screen 5 or by the Network Interface Module 15 of main control unit 1 with host computer, corresponding qualification program is configured according to different demand, as curent change, power factor change, frequency change, change in voltage, sampled point changes, packet loss, network interruption etc. customize electric energy precision influence amount, the scheme prepared is stored in main control unit 1, scheme of calling in during test starts according to the test number of turns automatically, test volumes etc. calculate the high-frequency impulse constant of corresponding power also voltage, electric current, frequency, the information such as angle are dealt into high-speed data processing unit 2(DSP by first communication ends (serial communication interface of CPU module 11) of main control unit 1), the parameter that high-speed data processing unit 2 configures according to main control unit 1, organize IEC61850-9-1/9-2 or FT3 message, according to the sample frequency arranged as 4k, 12.8k, transmit messages literary composition to tested digitalized electrical energy meter by the various optical fiber interfaces (ST optical fiber interface 31, SC optical fiber interface 32, RJ45 interface 33 etc.) of network management unit 3, FPGA unit 4 constantly gathers the pulse signal of the tested ammeter of access, high-frequency impulse number under the higher frequency sent according to high-speed data processing unit 2 and test number of turns computational rules pulse number also returns to high-speed data processing unit 2 by its data communication end (data bus), high-speed data processing unit 2 obtains the error under corresponding test condition according to formulae discovery and is uploaded to main control unit 1, main control unit 1 controls touch display screen 5 and carries out corresponding information display, and can be uploaded to ipc monitor platform.Main control unit 1, after the testing scheme according to setting has been tested, generates testing journal sheet automatically.
When intelligent substation carries out testing under on-the-spot real load condition, main control unit 1 configures the communications parameter of fast data processing unit 2 and Intelligent substation merging unit by touch display screen 5, as MAC Address, communication protocol, APPID, voltage and current etc. that passage is corresponding, the ammeter Puled input interface (meritorious and idle Puled input mouth) of FPGA unit 4 is connected with the pulse delivery outlet of digitalized electrical energy meter to be checked; If the merge cells of intelligent substation has special verification delivery outlet, then directly the ST optical fiber interface 31 of access device or SC optical fiber interface 32 verify, if the merge cells of intelligent substation does not have special delivery outlet, many mouthfuls that then utilize network management unit 3 to have synchronous forwarding capabilitys, the message that the merge cells of intelligent substation is sent synchronously is dealt into tested electric energy meter and high-speed data processing unit 2 simultaneously, also namely need not lays cable in addition and just can conveniently realize on-the-spot In-situ test.High-speed data processing unit 2 and tested ammeter obtain the digital signal of the merge cells of intelligent substation simultaneously, under being in identical real-time dynamic load simultaneously, the pulse that the tested electric energy meter of FPGA unit 4 dynamic acquisition exports, to catch and to high-speed data processing unit 2 interruption at the rising edge of first pulse, another rising edge triggered interrupts when predetermined pulse number arrives is to high-speed data processing unit 2, high-speed data processing unit 2 is calculated accumulative electricity during this period of time according to the difference of these two time points and is calculated the site error of this test point by meter constant conversion.
Upload the model accordance of the station level agreement using IEC61850-8-1 to test digitalized electrical energy meter simultaneously, the RJ45 interface of tested electric energy meter is connected by the Network Interface Module 15 of main control unit, by the IEC61850 model of MMS reading power meters, thus detect the function of digitalized electrical energy meter.
In sum, calibration device for digital electric energy meter of intelligent substation of the present invention, adopt the multicore architecture of the processing data information of main control unit, high-speed data processing unit and FPGA unit, for guaranteeing the detection real-time high-efficiency of device to digitalized electrical energy meter during real-time detection check, and accuracy of detection is high; Main control unit, by arranging network interface, communicates conveniently with backstage host computer during use; USB interface, RS232 communication interface are set, connect peripheral hardware convenient; Network management unit 3 is provided with ST optical fiber interface 31, SC optical fiber interface 32 and RJ45 interface 33, facilitates on-the-spot in verification and different fiber interface and network interface access, and carries out the conversion of interface after need not arriving verification scene again, time saving and energy saving; Meanwhile, cannot the problem of incoming fiber optic digital signal simultaneously when solving the calibrating of on-the-spot real load, can dynamic precision test under tested ammeter locality realizes real load; By the setting of touch display screen and push-button unit, make operation and control interface friendly, easy to use; Structure is relatively simple, and cost is lower.
Above embodiment is the explanation to the specific embodiment of the present invention; but not limitation of the present invention; person skilled in the relevant technique without departing from the spirit and scope of the present invention; can also make various conversion and change and obtain corresponding equivalent technical scheme, therefore all equivalent technical schemes all should be included into scope of patent protection of the present invention.
Claims (4)
1. a calibration device for digital electric energy meter of intelligent substation, is characterized in that: comprise main control unit (1), high-speed data processing unit (2), network management unit (3), FPGA unit (4), touch display screen (5), push-button unit (6) and Power Management Unit (7);
Main control unit (1) is provided with the first communication ends, second communication end, display end and push button signalling input end; High-speed data processing unit (2) is provided with the first to the 5th communication ends; Network management unit (3) is provided with data signal communication end and control signal communication ends; FPGA unit (4) is provided with data communication end; Touch display screen (5) is provided with display end; Push-button unit (6) is provided with signal output part;
First communication ends of main control unit (1) is electrically connected with the first communication ends two-way signaling of high-speed data processing unit (2); The second communication end of main control unit (1) is electrically connected with the second communication end two-way signaling of high-speed data processing unit (2); The display end of main control unit (1) is electrically connected with the display end two-way signaling of touch display screen (5); The push button signalling input end of main control unit (1) is electrically connected with the signal output part signal of push-button unit (6); The third communication end of high-speed data processing unit (2) is electrically connected with the data signal communication end two-way signaling of network management unit (3); 4th communication ends of high-speed data processing unit (2) is electrically connected with the control signal communication ends two-way signaling of network management unit (3); 5th communication ends of high-speed data processing unit (2) is electrically connected with the data communication end two-way signaling of FPGA unit (4); Power Management Unit (7) is for providing working power;
Described main control unit (1) comprises CPU module (11), flash memory module (12), SDRAM module (13), clock module (14), Network Interface Module (15), communication interface modules (16), usb interface module (17), display module (18) and dual port RAM module (19); CPU module (11) is provided with communication ends and button signal input end; Display module (18) and dual port RAM module (19) are provided with the first communication ends and second communication end respectively;
The flash memory module (12) of main control unit (1), SDRAM module (13), clock module (14), Network Interface Module (15), communication interface modules (16) and usb interface module (17) are electrically connected with CPU module (11) two-way signaling respectively; First communication ends of display module (18), the first communication ends of dual port RAM module (19) are electrically connected with CPU module (11) two-way signaling respectively;
The communication ends of CPU module (11) is the first communication ends of main control unit (1); The second communication end of dual port RAM module (19) is the second communication end of main control unit (1); The button signal input end of CPU module (11) is the push button signalling input end of main control unit (1); The second communication end of display module (18) is the display end of main control unit (1).
2. calibration device for digital electric energy meter of intelligent substation according to claim 1, is characterized in that: described high-speed data processing unit (2) comprises the 32 bit DSP chips that model is ADSP-BF518, and dominant frequency is 400MHz.
3. calibration device for digital electric energy meter of intelligent substation according to claim 2, is characterized in that: described network management unit (3) is provided with ST optical fiber interface (31), SC optical fiber interface (32) and RJ45 interface (33); Wherein, ST optical fiber interface (31) and SC optical fiber interface (32) are respectively provided with 2 respectively; RJ45 interface (33) is provided with 3.
4. calibration device for digital electric energy meter of intelligent substation according to claim 3, is characterized in that: described FPGA unit (4) is provided with high-frequency impulse output interface (41), ammeter Puled input interface (42) and FT3 data-interface (43).
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| CN201310595243.XA CN103605105B (en) | 2013-11-22 | 2013-11-22 | Calibration device for digital electric energy meter of intelligent substation |
| CN201610056898.3A CN105699932B (en) | 2013-11-22 | 2013-11-22 | High-precision intelligent substation digital electric energy meter calibration device |
| CN201610057569.0A CN105676162B (en) | 2013-11-22 | 2013-11-22 | Low-cost intelligent substation digital electric energy meter calibration device |
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| CN201310595243.XA CN103605105B (en) | 2013-11-22 | 2013-11-22 | Calibration device for digital electric energy meter of intelligent substation |
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| CN201610056898.3A Division CN105699932B (en) | 2013-11-22 | 2013-11-22 | High-precision intelligent substation digital electric energy meter calibration device |
| CN201610057569.0A Division CN105676162B (en) | 2013-11-22 | 2013-11-22 | Low-cost intelligent substation digital electric energy meter calibration device |
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| CN104459901A (en) * | 2014-12-05 | 2015-03-25 | 国家电网公司 | Special fiber interface conversion line for intelligent substation |
| CN105824001B (en) * | 2015-01-06 | 2020-08-28 | 国家电网公司 | Method and system for testing IEC61850 conformance of digital electric energy meter |
| CN105067932A (en) * | 2015-08-27 | 2015-11-18 | 郑州华力信息技术有限公司 | Intelligent electric power instrument |
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| CN105699932B (en) | 2017-10-17 |
| CN103605105A (en) | 2014-02-26 |
| CN105699932A (en) | 2016-06-22 |
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