CN105676162B - Low-cost intelligent substation digital electric energy meter calibration device - Google Patents
Low-cost intelligent substation digital electric energy meter calibration device Download PDFInfo
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- CN105676162B CN105676162B CN201610057569.0A CN201610057569A CN105676162B CN 105676162 B CN105676162 B CN 105676162B CN 201610057569 A CN201610057569 A CN 201610057569A CN 105676162 B CN105676162 B CN 105676162B
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- 238000012545 processing Methods 0.000 claims abstract description 47
- 238000004891 communication Methods 0.000 claims description 92
- 230000011664 signaling Effects 0.000 claims description 32
- 230000009977 dual effect Effects 0.000 claims description 16
- 239000013307 optical fiber Substances 0.000 abstract description 22
- 238000001514 detection method Methods 0.000 abstract description 9
- 230000002457 bidirectional effect Effects 0.000 abstract 2
- 238000007726 management method Methods 0.000 description 18
- 238000012360 testing method Methods 0.000 description 14
- 238000012795 verification Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 210000001367 artery Anatomy 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 210000003462 vein Anatomy 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000009131 signaling function Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
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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
Abstract
The invention provides a low-cost intelligent substation digital electric energy meter calibration device which comprises a main control unit, a high-speed data processing unit, a network management unit, an FPGA unit, a touch display screen, a key unit and a power supply management unit, wherein the main control unit is connected with the high-speed data processing unit; the main control unit is respectively electrically connected with the high-speed data processing unit and the touch display screen through bidirectional signals; the main control unit is in signal electrical connection with the key unit; the high-speed data processing unit is also electrically connected with the network management unit and the FPGA unit in a bidirectional signal mode respectively; the power management unit is used for providing working power. The multi-core framework is real-time and efficient in detection and calibration, high in detection precision, friendly in operation interface, rich in interfaces, convenient to access in a calibration site, time-saving and labor-saving, simple in structure, low in cost and convenient to use, and solves the problem that optical fiber digital signals cannot be simultaneously accessed under the condition of on-site real load calibration.
Description
The application be Application No. 201310595243.X, the applying date be that November 22, invention and created name in 2013 are
The divisional application of the application for a patent for invention of " calibration device for digital electric energy meter of intelligent substation ".
Technical field
The present invention relates to the intelligent substation gauge check technical field of electric power system, and in particular to it is a kind of to based on
The digitalized electrical energy meter school that the three phase electronic multifunctional electric energy meter of the intelligent substation of IEC6185 standards is examined and determine and tested
Experiment device.
Background technology
Intelligent substation is the important step that intelligent grid is built, and transformer station's digitlization, intellectuality has become one kind and become
Gesture, digital transformer substation is different from traditional transformer station, and its framework is in IEC61850 standard bases, using process layer, wall
With the three-decker of station level, all electrical measurements all process layer change into meet IEC61850 9-1,9-2 agreements numeral letter
After number, process layer or bay device are passed to by fiber optic Ethernet.Need to use in intelligent substation more based on
The digitalized electrical energy meter of amount, digital electricity meter used in it at laboratory and load operation real installed in intelligent substation all
Need to verify its error etc..Traditional electric energy meter has relatively ripe calibration equipment and relatively more complete calibrating rule
Journey and method；And digitalized electrical energy meter, compared with traditional ammeter, its measuring principle and method there occurs larger change, no
It is traditional dependence analog acquisition again, but completes to count based on the collection under IEC61850 standard architectures by digitized signal
Function is measured, and the modes such as network and miscellaneous equipment can be passed through（Such as background computer system）Realize communication.At present, can be preferably
The relative maturity of progress high precision test verification under real load condition at the scene is particularly in laboratory to digitalized electrical energy meter
Detection means or instrument are verified, it is still rare.
The content of the invention
The purpose of the present invention is：When a kind of relatively low simple in construction, cost, rich interface, accuracy of detection height being provided and being used
Convenient and fast connection lower-cost calibration device for digital electric energy meter of intelligent substation.
The technical scheme is that：The lower-cost calibration device for digital electric energy meter of intelligent substation of the present invention,
It is structurally characterized in that：Including main control unit, high-speed data processing unit, network management unit, FPGA unit, touch display screen,
Push-button unit and PMU；
Main control unit is provided with the first communication ends, the second communication ends, display signal end and push button signalling input；High-speed data
Processing unit is provided with first to fifth communication end；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 signal end；Push-button unit is provided with signal output part；
First communication ends of main control unit are electrically connected with the first communication ends two-way signaling of high-speed data processing unit；Master control
Second communication ends of unit are electrically connected with the second communication ends two-way signaling of high-speed data processing unit；The display letter of main control unit
Number end is electrically connected with the display signal end two-way signaling of touch display screen；The push button signalling input and push-button unit of main control unit
Signal output end signal electrical connection；The third communication end of high-speed data processing unit and the data-signal of network management unit are logical
Believe the electrical connection of end two-way signaling；The fourth communication end of high-speed data processing unit and the control signal communication ends of network management unit
Two-way signaling is electrically connected；The fifth communication end of high-speed data processing unit and the data communication end two-way signaling of FPGA unit are electrically connected
Connect；PMU is used to provide working power；
Above-mentioned main control unit includes CPU module, flash memory module, SDRAM module, clock module, Network Interface Module, logical
Believe interface module, usb interface module, display module and dual port RAM module；CPU module is inputted provided with communication ends and button signal
End；Display module and dual port RAM module are respectively provided with the first communication ends and the second communication ends；
Flash memory module, SDRAM module, clock module, Network Interface Module, communication interface modules and the USB of main control unit
Interface module is respectively electrically connected with CPU module two-way signaling；First communication ends of display module, the first of dual port RAM module
Communication ends are respectively electrically connected with CPU module two-way signaling；
The communication ends of CPU module are the first communication ends of main control unit；Based on second communication ends of dual port RAM module are
Control the second communication ends of unit；The button signal input of CPU module is the push button signalling input of main control unit；Show mould
Second communication ends of block are the display signal end of main control unit；
Above-mentioned FPGA unit is provided with high-frequency impulse output interface, ammeter pulse input interface and FT3 data-interfaces.
Further scheme is：Above-mentioned high-speed data processing unit includes model ADSP-BF518 32 bit DSP cores
Piece, dominant frequency is 400MHz.
Further scheme is：Above-mentioned network management unit is provided with ST optical fiber interfaces, SC optical fiber interfaces and RJ45 interfaces；
Wherein, ST optical fiber interfaces and SC optical fiber interfaces are respectively provided with 2 respectively；RJ45 interfaces are provided with 3.
The present invention has positive effect：（1）The lower-cost digital electric energy meter of intelligent substation verification of the present invention
Device, using the multicore architecture of the processing data information of main control unit, high-speed data processing unit and FPGA unit, for real-time
Detection real-time high-efficiency of the device to digitalized electrical energy meter is ensured during detection check, and accuracy of detection is high.（2）The present invention cost compared with
Low calibration device for digital electric energy meter of intelligent substation, main control unit is led to by setting network interface when using with backstage host computer
Letter is convenient；USB interface, RS232 communication interfaces are set, and connection peripheral hardware is convenient.（3）The lower-cost intelligent substation of the present invention
Digitalized electrical energy meter calibration equipment, network management unit 3 is provided with ST optical fiber interfaces 31, SC optical fiber interfaces 32 and RJ45 interfaces 33,
Facilitate and verifying the live access from different optical fiber interfaces and network interface, without entering line interface again to after verifying scene
Conversion, it is time saving and energy saving；Meanwhile, solve in the case of live real load calibrating incoming fiber optic data signal to ask simultaneously
Topic：Traditional field-checking can tester and electric energy meter and pick up come, while the voltage of sampling circuit, current signal carry out
Detection.The usually point-to-point message of hair 61850 of combining unit is to digitalized electrical energy meter in digital transformer substation, and combining unit is very
Rare reserved test designated lane is used for on-site proving, and the present invention is by network management unit, the number that combining unit is sent
It is believed that number by many mouthfuls it is synchronous forward, realize that calibration equipment and digitalized electrical energy meter synchronously obtain data, so as to tested
Realize the dynamic precision test under real load in ammeter locality.（4）The lower-cost intelligent substation digitalized electric energy of the present invention
Table calibration equipment, passes through the setting of touch display screen and push-button unit so that operation and control interface is friendly, easy to use.（5）The present invention
Lower-cost calibration device for digital electric energy meter of intelligent substation, structure is relatively easy, and cost is relatively low.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Reference 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 interfaces 31, SC optical fiber interfaces 32, RJ45 interfaces 33,
FPGA unit 4, high-frequency impulse output interface 41, ammeter pulse input interface 42, FT3 data-interfaces 43,
Touch display screen 5,
Push-button unit 6,
PMU 7.
Embodiment
The present invention is further detailed explanation with specific embodiment below in conjunction with the accompanying drawings.
（Embodiment 1）
See Fig. 1, the lower-cost calibration device for digital electric energy meter of intelligent substation of the present embodiment, mainly by master control list
Member 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 is constituted.
Main control unit 1 is provided with the first communication ends, the second communication ends, display signal end and push button signalling input；High speed number
According to processing unit 2 provided with first to fifth communication end；Network management unit 3 communicates provided with data signal communication end and control signal
End；FPGA unit 4 is provided with data communication end；Touch display screen 5 is provided with display signal end；Push-button unit 6 is provided with signal output part.
First communication ends of main control unit 1 are electrically connected with the first communication ends two-way signaling of high-speed data processing unit 2；It is main
Second communication ends of control unit 1 are electrically connected with the second communication ends two-way signaling of high-speed data processing unit 2；Main control unit 1
Display signal end is electrically connected with the display signal end two-way signaling of touch display screen 5；The push button signalling input of main control unit 1 with
The signal output end signal electrical connection of push-button unit 6；The third communication end of high-speed data processing unit 2 and network management unit 3
The electrical connection of data signal communication end two-way signaling；The fourth communication end of high-speed data processing unit 2 and network management unit 3
Control signal communication ends two-way signaling is electrically connected；The fifth communication end of high-speed data processing unit 2 leads to the data of FPGA unit 4
Believe the electrical connection of end two-way signaling；PMU 7 provides working power for each unit.
Main control unit 1 is main by CPU module 11, flash memory module 12, SDRAM module 13, clock module 14, network interface mould
Block 15, communication interface modules 16, usb interface module 17, display module 18 and dual port RAM module 19 are constituted.CPU module 11 is provided with
Communication ends and button signal input；Display module 18 and dual port RAM module 19 are respectively logical provided with the first communication ends and second
Believe end.
The flash memory module 12 of main control unit 1, SDRAM module 13, clock module 14, Network Interface Module 15, communication interface
Module 16 and usb interface module 17 are respectively electrically connected with the two-way signaling of CPU module 11；First communication ends of display module 18,
First communication ends of dual port RAM module 19 are respectively electrically connected with the two-way signaling of CPU module 11.
The communication ends of CPU module 11 are the first communication ends of main control unit 1；Second communication ends of dual port RAM module 19
As the second communication ends of main control unit 1；The button signal input of CPU module 11 is that the push button signalling of main control unit 1 is defeated
Enter end；Second communication ends of display module 18 are the display signal end of main control unit 1.
Frequency 200MHz ARM9 microprocessors, its serial port based on the core processing device of the CPU module 11 of main control unit 1
It is used as the first communication ends of main control unit 1.Flash memory module 12 is preferred to use NORFlash flash chips, and it is used to store basic ginseng
The information data such as number, testing scheme, the test result form of configuration.SDRAM module 13 is used for data storage and receiving is called.When
Clock module 14 is that CPU module 11 provides clock signal.Network Interface Module 15 is preferred to use RJ45 network interfaces, and it can be used for real
Now the digitalized electrical energy meter of the upload data function of IEC61850 standards is supported to carry out mould with the communication and connection of host computer
Type is tested and data call survey together.Communication interface modules 16 safeguards mouth provided with RS232, for being safeguarded to equipment.Usb interface module
17 be used to connecing USB flash disk realize data import and export and the equipment such as keyboard, mouse access.Display module 18, which is used to drive, to be touched
Display screen simultaneously realizes information exchange.One end of dual port RAM module 19 is electrically connected with the two-way signaling of CPU module 11, dual port RAM module
19 other end is the second communication ends of main control unit 1, and dual port RAM module 19 is used for the CPU module 11 for realizing main control unit 1
The communication of big data quantity between high-speed data processing unit 2.
High-speed data processing unit 2 is used to carry out data processing.In the present embodiment, high-speed data processing unit 2 is preferably adopted
With model ADSP-BF518 32 bit DSP chips, dominant frequency is 400MHz.
Network management unit 3 is used to realize synchronized transmission and receives data message and difference from heterogeneous networks interface
The data forwarding of passage and identification.Network management unit 3 is provided with ST optical fiber interfaces 31, SC optical fiber interfaces 32 and RJ45 interfaces 33,
Wherein, ST optical fiber interfaces 31 and SC optical fiber interfaces 32 are respectively provided with 2 respectively；RJ45 interfaces 33 are provided with 3.Pass through NE 3
Various interfaces setting, facilitate and verifying the live access from different optical fiber interfaces and network interface, without to verification
Enter the conversion of line interface behind scene again, it is time saving and energy saving.
FPGA unit 4, output and the input of tested digitalized electrical energy meter pulse and signal for realizing high-frequency impulse are caught
Catch and signal coding and decoding.FPGA unit 4 is provided with high-frequency impulse output interface 41, the and of ammeter pulse input interface 42
FT3 data-interfaces 43.Wherein, high-frequency impulse output interface 41 exports the active pulse output in 1 road and the idle pulse in 1 road；Ammeter arteries and veins
Rush active pulse and idle pulse that digitalized electrical energy meter is surveyed in reception when input interface 42 is used；FT3 data-interfaces 43 are signal
Feeding or submitting FPGA are decoded 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
IEC60044-8 electronic current mutual inductor standards provide the frame format used.
Touch display screen 5 is preferred to use 7 inch color touch LCDs, its be used for the input of parameter configuration with
And the display of relevant information.
Push-button unit 6 is made up of 8 function buttons.The supplementary means for functioning as touch display screen 5 of push-button unit 6
Realize parameter configuration and control.
PMU 7 is used to provide corresponding working power for each unit, each module of the present apparatus.
（Application examples）
The lower-cost calibration device for digital electric energy meter of intelligent substation of previous embodiment 1, for defeated to digital quantity
Enter the calibrating verification that electric energy meter carries out precision and other functions under the real load in laboratory and scene.
In laboratory verification, main control unit 1 passes through touch display screen 5 or the Network Interface Module by main control unit 1
15 are connected with host computer, and corresponding qualification program is configured according to different demands, and such as curent change, power factor change, frequency become
Change, voltage change, sampled point change, packet loss, network interruption etc. are customized to electric energy precision influence amount, the scheme storage prepared
In main control unit 1, the scheme of calling in automatically begins to calculate the high frequency arteries and veins of correspondence power according to the test number of turns, test volume etc. during test
Rush constant and the first communication ends that the information such as voltage, electric current, frequency, angle are passed through main control unit 1（CPU module 11 it is serial
Communication port）It is dealt into high-speed data processing unit 2（DSP）；The parameter that high-speed data processing unit 2 is configured according to main control unit 1, group
IEC61850-9-1/9-2 or FT3 messages are knitted, according to sample frequency such as 4k, 12.8k of setting, pass through network management unit 3
Various optical fiber interfaces (ST optical fiber interfaces 31, SC optical fiber interfaces 32, RJ45 interfaces 33 etc.) are transmitted messages literary to tested digitalized electric energy
Table；The pulse signal of the continuous tested ammeter of collection access of FPGA unit 4, it is frequent according to the height that high-speed data processing unit 2 is sent
Rate and the high-frequency impulse number tested under number of turns computational rules pulse number simultaneously pass through its data communication end（Data/address bus）Return to
High-speed data processing unit 2, high-speed data processing unit 2 calculates according to formula and obtains the error under corresponding test condition and upload
To main control unit 1, the control touch display screen 5 of main control unit 1 carries out corresponding information and shown, and it is flat to be uploaded to ipc monitor
Platform.Main control unit 1 automatically generates testing journal sheet after the completion of being tested according to the testing scheme of setting.
When being tested under intelligent substation carries out the real load condition in scene, main control unit 1 configures speed by touch display screen 5
The communications parameter of data processing unit 2 and Intelligent substation merging unit, such as MAC Address, communication protocol, APPID, passage correspondence
Voltage and current etc., by the ammeter pulse input interface of FPGA unit 4（Active and idle pulse input mouthful）With number to be checked
The pulse delivery outlet connection of word electric energy meter；If the combining unit of intelligent substation has special verification delivery outlet, directly connect
The ST optical fiber interfaces 31 or SC optical fiber interfaces 32 for entering device are verified, if the combining unit of intelligent substation does not have special defeated
Outlet, then many mouthfuls of synchronous forwarding capabilitys having using network management unit 3, the report that the combining unit of intelligent substation is sent
Text is while synchronous be dealt into tested electric energy meter and high-speed data processing unit 2, namely need not lay cable in addition and can conveniently realize
Live In-situ test.High-speed data processing unit 2 and tested ammeter obtain the numeral letter of the combining unit of intelligent substation simultaneously
Number, while under the real-time dynamic load of identical, the dynamic acquisition of FPGA unit 4 is detected the pulse of electric energy meter output, first
The rising edge capture of individual pulse is simultaneously sent out on interruption, another when predetermined pulse number arrives to high-speed data processing unit 2
Rise along triggering and interrupt to high-speed data processing unit 2, high-speed data processing unit 2 calculates this section according to the difference at the two time points
The electricity that adds up in time is simultaneously converted to calculate and obtains the site error of the test point by meter constant.
Simultaneously in order to test the model accordance that digitalized electrical energy meter uploads the station level agreement using IEC61850-8-1,
By the RJ45 interfaces of the tested electric energy meter of the connection of Network Interface Module 15 of main control unit, pass through mobile agent server protocol reading power meters
IEC61850 models, so as to detect the function of digitalized electrical energy meter.
In summary, lower-cost calibration device for digital electric energy meter of intelligent substation of the invention, using master control list
The multicore architecture of the processing data information of member, high-speed data processing unit and FPGA unit, ensures during for real-time detection check
Device is to the detection real-time high-efficiency of digitalized electrical energy meter, and accuracy of detection is high；Main control unit is by setting network interface, when using with after
The communication of platform host computer is convenient；USB interface, RS232 communication interfaces are set, and connection peripheral hardware is convenient；Network management unit 3 is provided with ST light
Fine interface 31, SC optical fiber interfaces 32 and RJ45 interfaces 33, facilitate verify it is live from different optical fiber interfaces and network interface
Access, the conversion without entering line interface after live again to verification is time saving and energy saving；Meanwhile, solve live real load calibrating
In the case of can not simultaneously incoming fiber optic data signal the problem of, the dynamic accuracy under real load can be realized in tested ammeter locality
Determine；Pass through the setting of touch display screen and push-button unit so that operation and control interface is friendly, easy to use；Structure is relatively easy, into
This is relatively low.
Above example is the explanation of the embodiment to the present invention, rather than limitation of the present invention, relevant technology
The technical staff in field without departing from the spirit and scope of the present invention, can also make various conversion and change and obtain
To corresponding equivalent technical scheme, therefore all equivalent technical schemes should be included into the patent protection model of the present invention
Enclose.
Claims (1)
1. a kind of lower-cost calibration device for digital electric energy meter of intelligent substation, it is characterised in that：Including 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 PMU（7）；
Main control unit（1）Provided with the first communication ends, the second communication ends, display signal end and push button signalling input；High-speed data
Processing unit（2）Provided with first to fifth communication end；Network management unit（3）It is logical provided with data signal communication end and control signal
Believe end；FPGA unit（4）Provided with data communication end；Touch display screen（5）Provided with display signal end；Push-button unit（6）Provided with letter
Number output end；
Main control unit（1）The first communication ends and high-speed data processing unit（2）The first communication ends two-way signaling electrical connection；It is main
Control unit（1）The second communication ends and high-speed data processing unit（2）The second communication ends two-way signaling electrical connection；Main control unit
（1）Display signal end and touch display screen（5）Display signal end two-way signaling electrical connection；Main control unit（1）Button letter
Number input and push-button unit（6）Signal output end signal electrical connection；High-speed data processing unit（2）Third communication end with
Network management unit（3）The electrical connection of data signal communication end two-way signaling；High-speed data processing unit（2）Fourth communication end
With network management unit（3）Control signal communication ends two-way signaling electrical connection；High-speed data processing unit（2）Fifth communication
End and FPGA unit（4）The electrical connection of data communication end two-way signaling；PMU（7）For providing working power；
Described main control unit（1）Including 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）With dual port RAM module
（19）；CPU module（11）Provided with communication ends and button signal input；Display module（18）With dual port RAM module（19）It is all provided with
There are the first communication ends and the second communication ends；
Main control unit（1）Flash memory module（12）, SDRAM module（13）, clock module（14）, Network Interface Module（15）, it is logical
Believe interface module（16）And usb interface module（17）Respectively with CPU module（11）Two-way signaling is electrically connected；Display module（18）
The first communication ends, dual port RAM module（19）The first communication ends respectively with CPU module（11）Two-way signaling is electrically connected；
CPU module（11）Communication ends be main control unit（1）The first communication ends；Dual port RAM module（19）Second communication
End is main control unit（1）The second communication ends；CPU module（11）Button signal input be main control unit（1）Press
Key signals input；Display module（18）The second communication ends be main control unit（1）Display signal end；
Described FPGA unit（4）Provided with high-frequency impulse output interface（41）, ammeter pulse input interface（42）Connect with FT3 data
Mouthful（43）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610057569.0A CN105676162B (en) | 2013-11-22 | 2013-11-22 | Low-cost intelligent substation digital electric energy meter calibration device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310595243.XA CN103605105B (en) | 2013-11-22 | 2013-11-22 | Calibration device for digital electric energy meter of intelligent substation |
| CN201610057569.0A CN105676162B (en) | 2013-11-22 | 2013-11-22 | Low-cost intelligent substation digital electric energy meter calibration device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310595243.XA Division CN103605105B (en) | 2013-11-22 | 2013-11-22 | Calibration device for digital electric energy meter of intelligent substation |
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| CN105676162A CN105676162A (en) | 2016-06-15 |
| CN105676162B true CN105676162B (en) | 2017-10-17 |
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2013
- 2013-11-22 CN CN201610057569.0A patent/CN105676162B/en active Active
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|---|---|---|---|---|
| US6735535B1 (en) * | 2000-05-05 | 2004-05-11 | Electro Industries/Gauge Tech. | Power meter having an auto-calibration feature and data acquisition capabilities |
| CN201285444Y (en) * | 2008-11-11 | 2009-08-05 | 郑州三晖电气有限公司 | Electric energy meter calibration apparatus |
| CN201327517Y (en) * | 2008-12-12 | 2009-10-14 | 江苏省电力试验研究院有限公司 | Integrated detection device of electric power terminal |
| CN101900801A (en) * | 2010-07-15 | 2010-12-01 | 田卫华 | Intelligent electric energy meter field test device and test method thereof |
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