CN103901391B - There is novel analog standard scale and the detection method of digitalized electrical energy meter detection function - Google Patents
There is novel analog standard scale and the detection method of digitalized electrical energy meter detection function Download PDFInfo
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Abstract
The invention discloses a kind of novel analog standard scale with digitalized electrical energy meter detection function, it is characterized in that, including A/D analog-digital converter, DSP unit, IEC61850 data modulator, IEC61850/FT3 data demodulator, Error Calculator, display and man-machine interaction unit, microprocessor and interface unit；A/D analog-digital converter, DSP unit are connected and trace to the source for simulating the verification/standard of electric energy meter；A/D analog-digital converter is connected for digitalized electrical energy meter offline inspection with IEC61850 data modulator；IEC61850/FT3 demodulator is connected with DSP unit to verify online for field digitized electric energy meter and compares.The present invention both can carry out electric energy metrical to analogue signal, can measure digital signal again, by the metering of mock standard table, detect digitalized electrical energy meter, has broken the method being compared to each other detection of simulation based on digital electric energy meter, and accuracy is high.
Description
Technical field
The present invention relates to electric energy meter metering and field tests, specifically there is novel analog standard scale and the detection method of digitalized electrical energy meter detection function.
Background technology
Along with appearance and the development of relevant art of IEC61850 Intelligent transformer station digital standards, digitized, networking electric energy meter are born therewith.The most how to establish its inspection criterion, how to detect digitalized electrical energy meter, how to carry out tracing to the source etc. the most just to have become to its examination criteria vast metrological personnel concern.But electric energy meter examination criteria/device broadly falls into analog quantity field, and digitalized electrical energy meter is not had respective standard, there is insoluble problem at technology and metering aspect of tracing to the source, therefore cannot realize digitalized electrical energy meter vertically measuring, tracing to the source.
In prior art, can only use like numbers table " table table " comparison pattern for digitalized electrical energy meter detection at present, so-called standard digital electric energy meter is also acted on one's own, and its standard is difficult to effectively verify, the result of therefore comparison lacks scientific, act of law.
Patent CN201607526 discloses a kind of for testing digitalized electric energy meter apparatus, it is achieved digital power source exports, and employs calibration pulse plate as standard comparing, still uses " table table " comparison pattern, and its standard is difficult to effectively verify.
Patent CN103048638 discloses a kind of Multi-function power digital signal inspection device, including digital power source and pulse unit, the standard value realizing the tested signal source that digital signal sends output, detection external connection calculates, but does not possess live signal source function and simulated power source.
Simulation electric energy meter measurement examination system is then highly developed, the system of specification, if it is possible to utilize analog measurement system to realize digital electricity meter detection, then can realize a mark dual-purpose, save measuring cost and can realize again the detection of digitalized electrical energy meter.
Summary of the invention
For solving prior art problem, it is achieved digitalized electrical energy meter mock standard detection method, the invention provides a kind of novel analog standard scale with digitalized electrical energy meter detection function and detection method.
The technical scheme is that a kind of novel analog standard scale with digitalized electrical energy meter detection function, including A/D analog-digital converter, DSP unit, IEC61850 data modulator, IEC61850/FT3 data demodulator, Error Calculator.More preferably, display and man-machine interaction unit are also included, for controlling display and the microprocessor of man-machine interaction unit and interface unit.
A/D analog-digital converter, IEC61850 data modulator, IEC61850/FT3 data demodulator, microprocessor, error calculation unit are all connected with DSP unit, show and man-machine interaction unit, interface unit are connected with microprocessor；The pulse output interface of DSP unit, the pulse output interface of measured number electric energy meter are all connected with the input interface of Error Calculator.
A/D analog-digital converter, DSP unit are connected and trace to the source for simulating the verification/standard of electric energy meter；A/D analog-digital converter is connected for digitalized electrical energy meter offline inspection with IEC61850 data modulator；IEC61850/FT3 demodulator be connected with DSP unit verify online for field digitized electric energy meter compare, electronic type mutual inductance inspection and DSP computing function checking.By IEC61850 I/O port, electrical energy pulse I/O port, analog signal channel can form metering trace to the source/transmit, checking system, complete several table standard traceability system/transmission of quantity value network system.
DSP unit includes that signal analysis module, electrical quantity computing module and electric energy computing module, signal analysis module, electrical quantity computing module are connected with electric energy computing module；A/D analog-digital converter, IEC61850 data modulator, IEC61850/FT3 data demodulator are connected with signal analysis module, and Error Calculator is connected with electric energy computing module, and electrical quantity computing module is connected with microprocessor with electric energy computing module.By signal analysis and the IEC61850/FT3 data demodulator of DSP unit, numeral output electric mutual inductor checking function can be realized, meanwhile, DSP unit and display and man-machine interaction unit achieve parameter measurement and the simultaneous display functions such as three-phase electric parameter voltage, electric current, frequency, phase place, power.
A/D analog-digital converter, IEC61850 data modulator, IEC61850 data demodulator are connected by data/address bus with DSP unit, and data transmission bauds is fast.More preferably, show and man-machine interaction unit, interface unit are connected by data/address bus with microprocessor, be connected by data/address bus between DSP unit with microprocessor.
A/D analog-digital converter is 6 tunnels, receives three-phase voltage, three-phase current analogue signal respectively, it is achieved that three-phase voltage, current analog signal input interface.
Interface unit includes that USB interface, RS232 interface and Ethernet interface, USB interface, RS232 interface, Ethernet interface are all connected with microprocessor, and by interface unit, the present invention can carry out data transmission with external equipment.Display and man-machine interaction unit include display screen, button, keyboard and mouse, facilitate the detection of digitalized electrical energy meter.
The detection that a kind of novel analog standard scale with digitalized electrical energy meter detection function can realize comprises the following steps: detection method, comprises the following steps: S01, and simulation electrical energy meter calibration/standard is traced to the source；S02, digitalized electrical energy meter offline inspection；S03, simulation electric energy meter and digitalized electrical energy meter synchronization check.The present invention is had digitalized electrical energy meter detection function novel analog standard scale detection method specific descriptions are presented herein below.
A kind of novel analog standard scale detection method with digitalized electrical energy meter detection function, comprises the following steps:
S01, simulation electrical energy meter calibration/standard is traced to the source: A/D analog-digital converter receives analogue signal and is converted into digital quantity, described digital quantity is transmitted to DSP unit from A/D analog-digital converter by internal data bus, the DSP unit data to receiving carry out electrical quantity calculating and electric energy calculates, calculate the corresponding electric energy of corresponding voltage, electric current, power, phase place electrical parameter and accumulation, and electrical energy impulse signals is sent to Error Calculator and outside delivery outlet；Meanwhile, tested simulation electric energy meter/electric energy standard receives analogue signal and metrical pulse is sent to Error Calculator, the electric energy error of the electrical energy pulse that the electrical energy pulse that Error Calculator calculating DSP unit sends sends with described tested simulation electric energy meter/electric energy standard；Realize comparing with tested simulation electric energy meter/electric energy calibration pulse, thus realize simulating electrical energy meter calibration/standard and trace to the source；
nullS02，Digitalized electrical energy meter offline inspection: A/D analog-digital converter receives after analogue signal is converted into digital quantity and is sent to IEC61850 data modulator and DSP unit，IEC61850 data modulator carries out communications protocol conversion to described digital quantity，I.e. digital quantity signal is modulated，Send the data message of described digital quantity signal corresponding format chronologically，Described data message is sent to off-line digital electric energy meter to be detected，Electrical energy impulse signals after metering is sent to Error Calculator by off-line digital electric energy meter，Simultaneously，The DSP unit data to receiving carry out electrical quantity calculating and electric energy calculates and electrical energy impulse signals is sent to Error Calculator，The pulse signal of Error Calculator more described off-line digital electric energy meter output and the electrical energy impulse signals of DSP unit metering output，Calculate electric energy error，Realize the offline inspection to digitalized electrical energy meter；
S03, simulation electric energy meter and digitalized electrical energy meter synchronization check: the electrical energy impulse signals of Error Calculator comparison step S01 simulation electric energy meter metering and the electrical energy impulse signals of the metering of step S02 digitalized electrical energy meter, it is achieved simulation electric energy meter verifies with digitalized electrical energy meter and is compared to each other.
Present invention additionally comprises digitalized electrical energy meter on-line checking: on-the-spot combining unit is by voltage, current data message is sent to IEC61850/FT3 data demodulator and online digitalized electrical energy meter, IEC61850/FT3 data demodulator receives IEC61850 message, restore original signal samples value, after described original signal samples value carries out electric energy calculating by DSP unit, be converted to pulse signal, it is sent to Error Calculator, simultaneously, online digitalized electrical energy meter receives the voltage that on-the-spot combining unit sends, after current data message, electrical energy impulse signals after metering is sent to Error Calculator, the pulse signal of Error Calculator more described online digitalized electrical energy meter output and the pulse signal of the DSP unit output described in this step, carry out electric energy error calculating.
Present invention additionally comprises the checking of DSP unit metering performance, IEC61850/FT3 message is sent to IEC61850/FT3 data demodulator by virtual criterion source, IEC61850/FT3 data demodulator receives IEC61850/FT3 message, restore original signal samples value, described original signal samples value carries out electric energy metrical by DSP unit and sends corresponding electrical energy pulse to Error Calculator, virtual criterion source outputting standard electrical energy pulse is to Error Calculator simultaneously, the electrical energy pulse of Error Calculator more described DSP unit metering and from the standard electric energy impulse in virtual criterion source, DSP unit electric energy computing module precision is verified.
Beneficial effect of the present invention includes, the present invention possesses standard analog, digital electricity meter function, realize simulation electric energy meter and digitalized electrical energy meter synchronization check, metering method by mock standard table, digitalized electrical energy meter is detected, having broken the method being compared to each other of digitalized electrical energy meter, scientific and reasonable, reliability and accuracy are higher.
Further, the present invention both can verify electric energy meter by off-line, again can be at X-ray inspection X electric energy meter, it is possible to be widely used laboratory and site environment.
Further, the present invention had both met management through quantification requirement of tracing to the source and turn avoid and arrange digital standards problem, mock standard table is used to trace to the source/transfer mode completely, it it is the technical scheme of a kind of optimization, internal DSP is as simulation, numeral common standard, greatly simplify system structure, hardware is minimum, and cost is minimum.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention has the novel analog standard scale of digitalized electrical energy meter detection function；
Fig. 2 is that the present invention has the novel analog standard scale of digitalized electrical energy meter detection function and tested electric energy meter connection diagram, and the structure in dotted line frame is the novel analog standard scale that the present invention has digitalized electrical energy meter detection function.
Detailed description of the invention
Being described in further detail technical solution of the present invention with specific embodiment below in conjunction with the accompanying drawings, so that those skilled in the art can be better understood from the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
As shown in Figure 1, a kind of novel analog standard scale with digitalized electrical energy meter detection function, including A/D analog-digital converter, DSP unit, IEC61850 data modulator, IEC61850/FT3 data demodulator, Error Calculator, display and man-machine interaction unit, for controlling display and the microprocessor of man-machine interaction unit and interface unit.
A/D analog-digital converter, IEC61850 data modulator, IEC61850/FT3 data demodulator, microprocessor, error calculation unit are all connected with DSP unit, show and man-machine interaction unit, interface unit are connected with microprocessor；The pulse output interface of DSP unit, the pulse output interface of measured number electric energy meter are all connected with the input interface of Error Calculator.
A/D analog-digital converter, DSP unit are connected and trace to the source for simulating the verification/standard of electric energy meter；A/D analog-digital converter is connected for digitalized electrical energy meter offline inspection with IEC61850 data modulator；IEC61850/FT3 demodulator be connected with DSP unit verify online for field digitized electric energy meter compare, electronic type mutual inductance inspection and DSP computing function checking.
DSP unit includes that signal analysis module, electrical quantity computing module and electric energy computing module, signal analysis module, electrical quantity computing module are connected with electric energy computing module；A/D analog-digital converter, IEC61850 data modulator, IEC61850/FT3 data demodulator are connected with signal analysis module, and Error Calculator is connected with electric energy computing module, and electrical quantity computing module is connected with microprocessor with electric energy computing module.
A/D analog-digital converter, IEC61850 data modulator, IEC61850 data demodulator are connected by data/address bus with DSP unit.
A/D analog-digital converter is 6 tunnels, receives three-phase voltage, three-phase current analogue signal respectively.
Interface unit includes that USB interface, RS232 interface and Ethernet interface, USB interface, RS232 interface, Ethernet interface are all connected with microprocessor.
Display and man-machine interaction unit include display screen, button, keyboard and mouse.
As in figure 2 it is shown, a kind of novel analog standard scale detection method with digitalized electrical energy meter detection function, comprise the following steps:
S01, simulation electrical energy meter calibration/standard is traced to the source: A/D analog-digital converter receives analogue signal and is converted into digital quantity, described digital quantity is transmitted to DSP unit from A/D analog-digital converter by internal data bus, the DSP unit data to receiving carry out electrical quantity calculating and electric energy calculates, calculate the corresponding electric energy of corresponding voltage, electric current, power, phase place electrical parameter and accumulation, and electrical energy impulse signals is sent to Error Calculator and outside delivery outlet；Meanwhile, tested simulation electric energy meter/electric energy standard receives analogue signal and metrical pulse is sent to Error Calculator, the electric energy error of the electrical energy pulse that the electrical energy pulse that Error Calculator calculating DSP unit sends sends with described tested simulation electric energy meter/electric energy standard；Realize comparing with tested simulation electric energy meter/electric energy calibration pulse, thus realize simulating electrical energy meter calibration/standard and trace to the source；
nullS02，Digitalized electrical energy meter offline inspection: A/D analog-digital converter receives after analogue signal is converted into digital quantity and is sent to IEC61850 data modulator and DSP unit，IEC61850 data modulator carries out communications protocol conversion to described digital quantity，I.e. digital quantity signal is modulated，Send the data message of described digital quantity signal corresponding format chronologically，Described data message is sent to off-line digital electric energy meter to be detected，Electrical energy impulse signals after metering is sent to Error Calculator by off-line digital electric energy meter，Simultaneously，The DSP unit data to receiving carry out electrical quantity calculating and electric energy calculates and electrical energy impulse signals is sent to Error Calculator，The pulse signal of Error Calculator more described off-line digital electric energy meter output and the electrical energy impulse signals of DSP unit metering output，Calculate electric energy error，Realize the offline inspection to digitalized electrical energy meter；
S03, simulation electric energy meter and digitalized electrical energy meter synchronization check: the electrical energy impulse signals of Error Calculator comparison step S01 simulation electric energy meter metering and the electrical energy impulse signals of the metering of step S02 digitalized electrical energy meter, it is achieved simulation electric energy meter verifies with digitalized electrical energy meter and is compared to each other.
Present invention additionally comprises digitalized electrical energy meter on-line checking: on-the-spot combining unit is by voltage, current data message is sent to IEC61850/FT3 data demodulator and online digitalized electrical energy meter, IEC61850/FT3 data demodulator receives IEC61850 message, restore original signal samples value, after described original signal samples value carries out electric energy calculating by DSP unit, be converted to pulse signal, it is sent to Error Calculator, simultaneously, online digitalized electrical energy meter receives the voltage that on-the-spot combining unit sends, after current data message, electrical energy impulse signals after metering is sent to Error Calculator, the pulse signal of Error Calculator more described online digitalized electrical energy meter output and the pulse signal of the DSP unit output described in this step, carry out electric energy error calculating.
Present invention additionally comprises the checking of DSP unit metering performance, IEC61850/FT3 message is sent to IEC61850/FT3 data demodulator by virtual criterion source, IEC61850/FT3 data demodulator receives IEC61850/FT3 message, restore original signal samples value, described original signal samples value carries out electric energy metrical by DSP unit and sends corresponding electrical energy pulse to Error Calculator, virtual criterion source outputting standard electrical energy pulse is to Error Calculator simultaneously, the electrical energy pulse of Error Calculator more described DSP unit metering and from the standard electric energy impulse in virtual criterion source, DSP unit electric energy computing module precision is verified.
Below it is only the preferred embodiment of the present invention; it is noted that, for those skilled in the art; under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (9)
1. a novel analog standard scale with digitalized electrical energy meter detection function, it is characterised in that include A/D analog digital conversion
Device, DSP unit, IEC61850 data modulator, IEC61850/FT3 data demodulator, Error Calculator and micro-process
Device；
Described A/D analog-digital converter, IEC61850 data modulator, IEC61850/FT3 data demodulator, error calculation unit are equal
It is connected with DSP unit；The pulse output interface of described DSP unit, measured number electric energy meter pulse output interface equal
It is connected with the input interface of Error Calculator；
Described A/D analog-digital converter, DSP unit are connected and trace to the source for simulating the verification/standard of electric energy meter；A/D analog-digital converter
Receive analogue signal and be also converted into digital quantity, described digital quantity by internal data bus from the transmission of A/D analog-digital converter to
DSP unit, the DSP unit data to receiving carry out electrical quantity calculating and electric energy calculates, and calculate corresponding voltage, electricity
The corresponding electric energy of stream, power, phase place electrical parameter and accumulation, and electrical energy impulse signals is sent to Error Calculator and outside defeated
Outlet；Meanwhile, tested simulation electric energy meter/electric energy standard receives analogue signal and metrical pulse is sent to Error Calculator, by mistake
The electrical energy pulse that the electrical energy pulse that difference computer calculating DSP unit sends sends with described tested simulation electric energy meter/electric energy standard
Electric energy error；
Described A/D analog-digital converter is connected for digitalized electrical energy meter offline inspection with IEC61850 data modulator；A/D modulus
Transducer receives after analogue signal is converted into digital quantity and is sent to IEC61850 data modulator and DSP unit, IEC61850
Data modulator carries out communications protocol conversion to described digital quantity, is i.e. modulated digital quantity signal, sends described number chronologically
The data message of word amount signal corresponding format, described data message is sent to off-line digital electric energy meter to be detected, off-line digital
Changing electric energy meter and the electrical energy impulse signals after metering is sent to Error Calculator, meanwhile, the DSP unit data to receiving are carried out
Electrical quantity calculates and electric energy calculates and electrical energy impulse signals is sent to Error Calculator, the more described off-line digital of Error Calculator
Change pulse signal and the electrical energy impulse signals of DSP unit metering output of electric energy meter output, calculate electric energy error；
Described IEC61850/FT3 demodulator is connected with DSP unit for field digitized electric energy meter on-line checking and DSP unit
Function of measuring is verified；On-the-spot combining unit voltage, current data message are sent to IEC61850/FT3 data demodulator and
Line digitalized electrical energy meter, IEC61850/FT3 data demodulator receives IEC61850 message, restores original signal samples
Value, after described original signal samples value carries out electric energy calculating by DSP unit, is converted to pulse signal, is sent to error meter
Calculate device, meanwhile, after online digitalized electrical energy meter receives the voltage of on-the-spot combining unit transmission, current data message, after metering
Electrical energy impulse signals be sent to Error Calculator, Error Calculator more described online digitalized electrical energy meter output pulse signal
With the pulse signal of described DSP unit output, carry out electric energy error calculating；Virtual criterion source is by IEC61850/FT3 message
Sending to IEC61850/FT3 data demodulator, IEC61850/FT3 data demodulator receives IEC61850/FT3 message,
Restoring original signal samples value, described original signal samples value carries out electric energy metrical by DSP unit and sends corresponding electric energy
Pulse is to Error Calculator, and outputting standard electrical energy pulse in virtual criterion source is to Error Calculator simultaneously, and Error Calculator compares institute
State the electrical energy pulse of DSP unit metering and from the standard electric energy impulse in virtual criterion source, to DSP unit electric energy computing module
Precision is verified；
The pulse delivery outlet of described DSP unit is the calibration pulse delivery outlet for comparing with measured number electric energy meter；
Described DSP unit includes signal analysis module, electrical quantity computing module and electric energy computing module, described signal analysis module,
Electrical quantity computing module is connected with electric energy computing module；A/D analog-digital converter, IEC61850 data modulator,
IEC61850/FT3 data demodulator is connected with signal analysis module, and Error Calculator is connected with electric energy computing module, electricity
Parameter calculating module is connected with microprocessor with electric energy computing module.
The novel analog standard scale with digitalized electrical energy meter detection function the most according to claim 1, it is characterised in that institute
State A/D analog-digital converter, IEC61850 data modulator, IEC61850/FT3 data demodulator with DSP unit by number
Connect according to bus.
The novel analog standard scale with digitalized electrical energy meter detection function the most according to claim 1, it is characterised in that institute
Stating A/D analog-digital converter is 6 tunnels, receives three-phase voltage, three-phase current analogue signal respectively.
The novel analog standard scale with digitalized electrical energy meter detection function the most according to claim 1, it is characterised in that also
Including display and man-machine interaction unit and interface unit；Described display and man-machine interaction unit, interface unit are connected with microprocessor
Connect；Described microprocessor is connected with DSP unit, and microprocessor is used for controlling display and man-machine interaction unit.
The novel analog standard scale with digitalized electrical energy meter detection function the most according to claim 4, it is characterised in that institute
State interface unit and include USB interface, RS232 interface and Ethernet interface, described USB interface, RS232 interface, ether
Network interface is all connected with described microprocessor.
The novel analog standard scale with digitalized electrical energy meter detection function the most according to claim 4, it is characterised in that institute
State display and man-machine interaction unit includes display screen, button, keyboard and mouse.
7. a novel analog standard scale detection method with digitalized electrical energy meter detection function, it is characterised in that
Detect based on the novel analog standard scale with digitalized electrical energy meter detection function as described in any one of claim 1-6,
Specifically include following steps:
S01, simulates electrical energy meter calibration/standard and traces to the source: A/D analog-digital converter receives analogue signal and is also converted into digital quantity, described numeral
Measuring and transmitted to DSP unit from A/D analog-digital converter by internal data bus, the DSP unit data to receiving carry out electricity
Parameter calculates and electric energy calculates, and calculates the corresponding electric energy of corresponding voltage, electric current, power, phase place electrical parameter and accumulation,
And electrical energy impulse signals is sent to Error Calculator and outside delivery outlet；Meanwhile, tested simulation electric energy meter/electric energy standard receives
Metrical pulse is also sent to Error Calculator by analogue signal, and Error Calculator calculates electrical energy pulse and the institute that DSP unit sends
State the electric energy error of the electrical energy pulse that tested simulation electric energy meter/electric energy standard sends；Realize and tested simulation electric energy meter/electric energy standard
Pulse ratio relatively, thus realizes simulating electrical energy meter calibration/standard and traces to the source；
S02, digitalized electrical energy meter offline inspection: A/D analog-digital converter receives after analogue signal is converted into digital quantity and is sent to
IEC61850 data modulator and DSP unit, IEC61850 data modulator carries out communications protocol conversion to described digital quantity,
I.e. digital quantity signal is modulated, sends the data message of described digital quantity signal corresponding format, described data message chronologically
Being sent to off-line digital electric energy meter to be detected, the electrical energy impulse signals after metering is sent to error by off-line digital electric energy meter
Computer, meanwhile, the DSP unit data to receiving carry out electrical quantity calculating and electric energy calculates and sent by electrical energy impulse signals
To Error Calculator, pulse signal and the DSP unit metering of the output of Error Calculator more described off-line digital electric energy meter are defeated
The electrical energy impulse signals gone out, calculates electric energy error, it is achieved the offline inspection to digitalized electrical energy meter；
S03, simulation electric energy meter and digitalized electrical energy meter synchronization check: the electricity of Error Calculator comparison step S01 simulation electric energy meter metering
The electrical energy impulse signals of the metering of energy impulse signal and step S02 digitalized electrical energy meter, it is achieved simulation electric energy meter and digitalized electric energy
Table synchronization check and being compared to each other.
A kind of novel analog standard scale detection method with digitalized electrical energy meter detection function the most according to claim 7, its
It is characterised by, also includes digitalized electrical energy meter on-line checking: voltage, current data message are sent to by on-the-spot combining unit
IEC61850/FT3 data demodulator and online digitalized electrical energy meter, IEC61850/FT3 data demodulator receives IEC61850
Message, restores original signal samples value, after described original signal samples value carries out electric energy calculating by DSP unit, and conversion
For pulse signal, be sent to Error Calculator, meanwhile, online digitalized electrical energy meter receive voltage that on-the-spot combining unit sends,
After current data message, the electrical energy impulse signals after metering is sent to Error Calculator, the more described online number of Error Calculator
The pulse signal of word electric energy meter output and the pulse signal of described DSP unit output, carry out electric energy error calculating.
A kind of novel analog standard scale detection method with digitalized electrical energy meter detection function the most according to claim 7, its
Being characterised by, also include that DSP unit metering performance is verified, IEC61850/FT3 message is sent extremely by virtual criterion source
IEC61850/FT3 data demodulator, IEC61850/FT3 data demodulator receives IEC61850/FT3 message, restores
Original signal samples value, described original signal samples value by DSP unit carry out electric energy metrical and send corresponding electrical energy pulse to
Error Calculator, outputting standard electrical energy pulse in virtual criterion source is to Error Calculator simultaneously, the more described DSP of Error Calculator
The electrical energy pulse of unit metering and from the standard electric energy impulse in virtual criterion source, enters DSP unit electric energy computing module precision
Row checking.
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| CN106019202A (en) * | 2016-05-12 | 2016-10-12 | 国网天津市电力公司 | Multi-channel digital standard electric energy meter |
| CN106324554A (en) * | 2016-10-18 | 2017-01-11 | 宁波三星医疗电气股份有限公司 | Method for testing electric energy meter with error self-checking function |
| CN112698262B (en) * | 2020-11-27 | 2022-09-13 | 国网湖北省电力有限公司营销服务中心(计量中心) | Automatic detection device and detection method for digital electric energy centralized metering device |
| CN113156204B (en) * | 2021-03-25 | 2023-12-05 | 中国电力科学研究院有限公司 | Digital source quantization error reduction method and system based on recursion iteration |
| CN113447884A (en) * | 2021-07-06 | 2021-09-28 | 国网江苏省电力有限公司营销服务中心 | Automatic detection system and method for management core of intelligent Internet of things electric energy meter |
| CN113640730A (en) * | 2021-07-08 | 2021-11-12 | 深圳市科陆精密仪器有限公司 | Intelligent Internet of things meter electric energy error verification system and method |
| CN113985343B (en) * | 2021-12-30 | 2022-03-22 | 南京市计量监督检测院 | Online sampling inspection device for electric energy meter and application method thereof |
| CN115685048A (en) * | 2022-12-01 | 2023-02-03 | 浙江万胜智能科技股份有限公司 | Online calibration method and system for communication module of intelligent electric meter |
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| US5325048A (en) * | 1992-04-14 | 1994-06-28 | Digital Kwh Inc. | Method and apparatus for calibrating a digital electric engergy consumption meter |
| CN101718856B (en) * | 2009-12-11 | 2012-12-26 | 中国电力科学研究院 | Calibration system of digital quantity input type electric energy meter |
| CN102928810A (en) * | 2012-11-12 | 2013-02-13 | 四川电力科学研究院 | System and method for evaluating accuracy of digital electric energy meter |
| CN103336264B (en) * | 2013-06-07 | 2015-04-01 | 国家电网公司 | Digital electric energy meter quantity value tracing system based on analog quantity detection and digital electric energy meter quantity value tracing method based analog quantity detection |
| CN103558577A (en) * | 2013-10-29 | 2014-02-05 | 国家电网公司 | Double-input-type digital standard energy meter, detecting system and quantity value source tracing system |
| CN203811799U (en) * | 2014-04-09 | 2014-09-03 | 国家电网公司 | Novel analog standard meter with digital electric energy meter detection function |
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