CN103901391A - Novel analog standard meter with digital electric energy meter detection function and detection method - Google Patents
Novel analog standard meter with digital electric energy meter detection function and detection method Download PDFInfo
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Abstract
The invention discloses a novel analog standard meter with the digital electric energy meter detection function. The novel analog standard meter with the digital electric energy meter detection function is characterized by comprising an A/D converter, a DSP unit, an IEC61850 data modulator, an IEC61850/FT3 data modulator, an error counter, a display and man-machine interaction unit, a microprocessor and an interface unit. The A/D converter and the DSP unit are connected and used for detection and standard trackback of an analog electric energy meter. The A/D converter and IEC61850 data modulator are connected and used for off-line detection of a digital electric energy meter. The IEC61850/FT3 data modulator and the DSP unit are connected and used for on-spot and on-line checking and comparison of the digital electric energy meter. The novel analog standard meter with the digital electric energy meter detection function and a detection method can carry out electric energy measurement not only on analog signals, but also on digital signals, the digital electric energy meter is detected through counting of the analog standard meter, a detection method of comparing analog digital electric energy meters is replaced, 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 measuring ability.
Background technology
Along with the appearance of IEC61850 Intelligent transformer station digitizing standard and the development of relevant art, digitizing, networking electric energy meter are born thereupon.Therefore how to establish its detect standard, how to detect digitalized electrical energy meter, how to its examination criteria problem that has also just become vast metrological personnel to be concerned about such as trace to the source.But electric energy meter examination criteria/device all belongs to analog quantity field, and digitalized electrical energy meter is not had to respective standard, there is insoluble problem in technology and metering aspect tracing to the source, therefore cannot realize and vertically measure, trace to the source digitalized electrical energy meter.
In prior art, detect and can only adopt like number table " table-table " comparison pattern for digitalized electrical energy meter at present, so-called standard digital electric energy meter is also acted on one's own, and its standard is difficult to effective checking, and therefore the result of comparison lacks scientific, legal effect.
Patent CN201607526 discloses a kind of for testing digitalized electric energy meter apparatus, realizes digital power source output, has used full sized pules plate as standard comparison, and what still use is " table-table " comparison pattern, and its standard is difficult to effective checking.
Patent CN103048638 discloses a kind of electric energy digital quantity signal multifunctional examining experiment device, comprise digital power source and pulse unit, realize digital signal transmission output, detect the standard value calculating of the outside tested signal source connecting, but do not possess live signal source function and simulated power source.
Simulation electric energy meter metering detection system is system very ripe, standard, detects if can utilize analog measurement system to realize digital electricity meter, the detection that can realize a mark dual-purpose, save measuring cost and can realize again digitalized electrical energy meter.
Summary of the invention
For solving prior art problem, realize digitalized electrical energy meter mock standard detection method, the invention provides a kind of novel analog standard scale and detection method with digitalized electrical energy meter measuring ability.
Technical scheme of the present invention is: a kind of novel analog standard scale with digitalized electrical energy meter measuring ability, comprises A/D analog to digital converter, DSP unit, IEC61850 data modulator, IEC61850/FT3 data demodulator, Error Calculator.More preferably, also comprise demonstration and man-machine interaction unit, show and microprocessor and the interface unit of man-machine interaction unit for controlling.
A/D analog to digital converter, IEC61850 data modulator, IEC61850/FT3 data demodulator, microprocessor, error calculation unit are all connected with DSP unit, and demonstration and man-machine interaction unit, interface unit are connected with microprocessor; The pulse output interface of the pulse output interface of DSP unit, digitalized electrical energy meter to be detected is all connected with the input interface of Error Calculator.
A/D analog to digital converter, DSP unit are connected and trace to the source for verification/standard of simulating electric energy meter; A/D analog to digital converter is connected for digitalized electrical energy meter offline inspection with IEC61850 data modulator; IEC61850/FT3 detuner is connected with DSP unit and verifies online comparison, electronic type mutual inductance check and the checking of DSP computing function for field digitized electric energy meter.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 systems.
DSP unit comprises signal analyse block, electrical quantity computing module and energy calculate module, and signal analyse block, electrical quantity computing module are connected with energy calculate module; A/D analog to digital converter, DSP unit, IEC61850 data modulator, IEC61850/FT3 data demodulator are connected with signal analyse block, Error Calculator is connected with energy calculate module, and electrical quantity computing module is connected with microprocessor with energy calculate module.By signal analysis and the IEC61850/FT3 data demodulator of DSP unit, can realize numeral output electric mutual inductor checking function, meanwhile, DSP unit and demonstration and man-machine interaction unit have been realized parameter measurement and the simultaneous display functions such as three-phase electric parameter voltage, electric current, frequency, phase place, power.
A/D analog to digital converter, IEC61850 data modulator, IEC61850 data demodulator are connected by data bus with DSP unit, and data rate is fast.More preferably, demonstration and man-machine interaction unit, interface unit are connected by data bus with microprocessor, between DSP unit and microprocessor, are connected by data bus.
A/D analog to digital converter is 6 tunnels, receives respectively three-phase voltage, three-phase current simulating signal, has realized three-phase voltage, current analog signal input interface.
Interface unit comprises USB interface, RS232 interface and Ethernet interface, and 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.Demonstration and man-machine interaction unit comprise display screen, button, keyboard and mouse, facilitate the detection of digitalized electrical energy meter.
Having the detection that the novel analog standard scale of digitalized electrical energy meter measuring ability can realize comprises the following steps: a 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.That the novel analog standard scale detection method with digitalized electrical energy meter measuring ability of the present invention is specifically described below.
A novel analog standard scale detection method with digitalized electrical energy meter measuring ability, comprises the following steps:
S01, simulation electrical energy meter calibration/standard is traced to the source: A/D analog to digital converter receives simulating signal and converts digital quantity to, described digital quantity transfers to DSP unit by internal data bus from A/D analog to digital converter, DSP unit carries out electrical quantity calculating and energy calculate to the data that receive, 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 simulating 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 and described tested simulation electric energy meter/electric energy standard are sent; Realize and tested simulation table/electric energy full sized pules comparison, trace to the source thereby realize simulation electrical energy meter calibration/standard;
S02, digitalized electrical energy meter offline inspection: A/D analog to digital converter receives after simulating signal converts digital quantity to and sends to IEC61850 data modulator and DSP unit, IEC61850 data modulator connects, described digital quantity is carried out to communications protocol conversion, digital quantity signal is modulated, send chronologically the data message of described digital quantity signal corresponding format, described data message sends to off-line digital electric energy meter to be detected, the electrical energy impulse signals after metering is sent to Error Calculator by off-line digital electric energy meter, simultaneously, DSP unit carries out electrical quantity calculating and energy calculate and electrical energy impulse signals is sent to Error Calculator the data that receive, the electrical energy impulse signals of the pulse signal of the more described off-line digital electric energy meter output of Error Calculator and the metering output of DSP unit, 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 the electrical energy impulse signals that Error Calculator comparison step S01 simulation electric energy meter measures and the metering of step S02 digitalized electrical energy meter, realize simulation electric energy meter and digitalized electrical energy meter verification and mutually compare.
The present invention also comprises that digitalized electrical energy meter detects online: on-the-spot merge cells is by voltage, current data message sends to IEC61850/FT3 data demodulator and online digitalized electrical energy meter, IEC61850/FT3 data demodulator receives IEC61850 message, restore original signal sampled value, described original signal sampled value is undertaken after energy calculate by DSP unit, be converted to pulse signal, send to Error Calculator, simultaneously, online digitalized electrical energy meter receives the voltage that on-the-spot merge cells sends, after current data message, electrical energy impulse signals after metering is sent to Error Calculator, the pulse signal of the DSP unit output described in pulse signal and this step of the more described line digitalized electrical energy meter output of Error Calculator, carry out electric energy error calculating.
The present invention also comprises the metering performance checking of DSP unit, IEC61850/FT3 message is sent to IEC61850/FT3 data demodulator by virtual standard source, IEC61850/FT3 data demodulator receives IEC61850/FT3 message, restore original signal sampled value, described original signal sampled value is carried out electric energy metrical and is sent respective electrical energy impulse to Error Calculator by DSP unit, virtual standard source outputting standard electrical energy pulse is to Error Calculator simultaneously, the electrical energy pulse of the more described DSP of Error Calculator unit metering and the standard electric energy impulse that carrys out self-virtualizing standard source, DSP energy calculate module precision is verified.
Beneficial effect of the present invention comprises, the present invention possesses standard analog, digital electricity meter function, realize simulation electric energy meter and digitalized electrical energy meter synchronization check, by the metering method of mock standard table, digitalized electrical energy meter is detected, broken the method for the mutual comparison of digitalized electrical energy meter, scientific and reasonable, reliability and accuracy are higher.
Further, the present invention both can off-line verification electric energy meter, can, at X-ray inspection X electric energy meter, can be widely used laboratory and site environment again.
Further, the present invention had not only met and traces to the source measuring control requirement but also avoided arranging digitizing typical problem, adopt trace to the source/transfer mode of mock standard table completely, it is a kind of technical scheme of optimization, inner DSP is as simulation, digital common standard, greatly simplified system architecture, 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 measuring ability;
Fig. 2 is novel analog standard scale and the tested electric energy meter connection diagram that the present invention has digitalized electrical energy meter measuring ability, and the structure in dotted line frame is the novel analog standard scale that the present invention has digitalized electrical energy meter measuring ability.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, technical solution of the present invention is described in further detail, can be implemented so that those skilled in the art can better understand the present invention also, but illustrated embodiment is not as a limitation of the invention.
As shown in Figure 1, there is a novel analog standard scale for digitalized electrical energy meter measuring ability, comprise A/D analog to digital converter, DSP unit, IEC61850 data modulator, IEC61850/FT3 data demodulator, Error Calculator, demonstration and man-machine interaction unit, show and microprocessor and the interface unit of man-machine interaction unit for controlling.
A/D analog to digital converter, IEC61850 data modulator, IEC61850/FT3 data demodulator, microprocessor, error calculation unit are all connected with DSP unit, and demonstration and man-machine interaction unit, interface unit are connected with microprocessor; The pulse output interface of the pulse output interface of DSP unit, digitalized electrical energy meter to be detected is all connected with the input interface of Error Calculator.
A/D analog to digital converter, DSP unit are connected and trace to the source for verification/standard of simulating electric energy meter; A/D analog to digital converter is connected for digitalized electrical energy meter offline inspection with IEC61850 data modulator; IEC61850/FT3 detuner is connected with DSP unit and verifies online comparison, electronic type mutual inductance check and the checking of DSP computing function for field digitized electric energy meter.
DSP unit comprises signal analyse block, electrical quantity computing module and energy calculate module, and signal analyse block, electrical quantity computing module are connected with energy calculate module; A/D analog to digital converter, DSP unit, IEC61850 data modulator, IEC61850/FT3 data demodulator are connected with signal analyse block, Error Calculator is connected with energy calculate module, and electrical quantity computing module is connected with microprocessor with energy calculate module.
A/D analog to digital converter, IEC61850 data modulator, IEC61850 data demodulator are connected by data bus with DSP unit.
A/D analog to digital converter is 6 tunnels, receives respectively three-phase voltage, three-phase current simulating signal.
Interface unit comprises USB interface, RS232 interface and Ethernet interface, and USB interface, RS232 interface, Ethernet interface are all connected with microprocessor.
Demonstration and man-machine interaction unit comprise display screen, button, keyboard and mouse.
As shown in Figure 2, a kind of novel analog standard scale detection method with digitalized electrical energy meter measuring ability, comprises the following steps:
S01, simulation electrical energy meter calibration/standard is traced to the source: A/D analog to digital converter receives simulating signal and converts digital quantity to, described digital quantity transfers to DSP unit by internal data bus from A/D analog to digital converter, DSP unit carries out electrical quantity calculating and energy calculate to the data that receive, 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 simulating 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 and described tested simulation electric energy meter/electric energy standard are sent; Realize and tested simulation table/electric energy full sized pules comparison, trace to the source thereby realize simulation electrical energy meter calibration/standard;
S02, digitalized electrical energy meter offline inspection: A/D analog to digital converter receives after simulating signal converts digital quantity to and sends to IEC61850 data modulator and DSP unit, IEC61850 data modulator connects, described digital quantity is carried out to communications protocol conversion, digital quantity signal is modulated, send chronologically the data message of described digital quantity signal corresponding format, described data message sends to off-line digital electric energy meter to be detected, the electrical energy impulse signals after metering is sent to Error Calculator by off-line digital electric energy meter, simultaneously, DSP unit carries out electrical quantity calculating and energy calculate and electrical energy impulse signals is sent to Error Calculator the data that receive, the electrical energy impulse signals of the pulse signal of the more described off-line digital electric energy meter output of Error Calculator and the metering output of DSP unit, 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 the electrical energy impulse signals that Error Calculator comparison step S01 simulation electric energy meter measures and the metering of step S02 digitalized electrical energy meter, realize simulation electric energy meter and digitalized electrical energy meter verification and mutually compare.
The present invention also comprises that digitalized electrical energy meter detects online: on-the-spot merge cells is by voltage, current data message sends to IEC61850/FT3 data demodulator and online digitalized electrical energy meter, IEC61850/FT3 data demodulator receives IEC61850 message, restore original signal sampled value, described original signal sampled value is undertaken after energy calculate by DSP unit, be converted to pulse signal, send to Error Calculator, simultaneously, online digitalized electrical energy meter receives the voltage that on-the-spot merge cells sends, after current data message, electrical energy impulse signals after metering is sent to Error Calculator, the pulse signal of the DSP unit output described in pulse signal and this step of the more described line digitalized electrical energy meter output of Error Calculator, carry out electric energy error calculating.
The present invention also comprises the metering performance checking of DSP unit, IEC61850/FT3 message is sent to IEC61850/FT3 data demodulator by virtual standard source, IEC61850/FT3 data demodulator receives IEC61850/FT3 message, restore original signal sampled value, described original signal sampled value is carried out electric energy metrical and is sent respective electrical energy impulse to Error Calculator by DSP unit, virtual standard source outputting standard electrical energy pulse is to Error Calculator simultaneously, the electrical energy pulse of the more described DSP of Error Calculator unit metering and the standard electric energy impulse that carrys out self-virtualizing standard source, DSP energy calculate module precision is verified.
Below be only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a novel analog standard scale with digitalized electrical energy meter measuring ability, is characterized in that, comprises A/D analog to digital converter, DSP unit, IEC61850 data modulator, IEC61850/FT3 data demodulator, Error Calculator;
Described A/D analog to digital converter, IEC61850 data modulator, IEC61850/FT3 data demodulator, error calculation unit are all connected with DSP unit; The pulse output interface of described DSP unit, the pulse output interface of digitalized electrical energy meter to be detected are all connected with the input interface of Error Calculator;
Described A/D analog to digital converter, DSP unit are connected and trace to the source for verification/standard of simulating electric energy meter;
Described A/D analog to digital converter is connected for digitalized electrical energy meter offline inspection with IEC61850 data modulator;
Described IEC61850/FT3 detuner is connected with DSP unit and verifies online comparison, electronic type mutual inductance check and the checking of DSP function of measuring for field digitized electric energy meter;
The pulse delivery outlet of described DSP unit is the full sized pules delivery outlet for comparing with measured number electric energy meter.
2. the novel analog standard scale with digitalized electrical energy meter measuring ability according to claim 1, it is characterized in that, described DSP unit comprises signal analyse block, electrical quantity computing module and energy calculate module, and described signal analyse block, electrical quantity computing module are connected with energy calculate module; A/D analog to digital converter, DSP unit, IEC61850 data modulator, IEC61850/FT3 data demodulator are connected with signal analyse block, Error Calculator is connected with energy calculate module, and electrical quantity computing module is connected with microprocessor with energy calculate module.
3. the novel analog standard scale with digitalized electrical energy meter measuring ability according to claim 1, it is characterized in that, described A/D analog to digital converter, IEC61850 data modulator, IEC61850/FT3 data demodulator are connected by data bus with DSP unit.
4. the novel analog standard scale with digitalized electrical energy meter measuring ability according to claim 1, is characterized in that, described A/D analog to digital converter is 6 tunnels, receives respectively three-phase voltage, three-phase current simulating signal.
5. a novel analog standard scale with digitalized electrical energy meter measuring ability, is characterized in that, also comprises demonstration and man-machine interaction unit, shows and microprocessor and the interface unit of man-machine interaction unit for controlling; Described demonstration and man-machine interaction unit, interface unit are connected with microprocessor; Described microprocessor is connected with DSP unit.
6. the novel analog standard scale with digitalized electrical energy meter measuring ability according to claim 5, it is characterized in that, described interface unit comprises USB interface, RS232 interface and Ethernet interface, and described USB interface, RS232 interface, Ethernet interface are all connected with described microprocessor.
7. the novel analog standard scale with digitalized electrical energy meter measuring ability according to claim 1, is characterized in that, described demonstration and man-machine interaction unit comprise display screen, button, keyboard and mouse.
8. a novel analog standard scale detection method with digitalized electrical energy meter measuring ability, is characterized in that, comprises the following steps:
S01, simulation electrical energy meter calibration/standard is traced to the source: A/D analog to digital converter receives simulating signal and converts digital quantity to, described digital quantity transfers to DSP unit by internal data bus from A/D analog to digital converter, DSP unit carries out electrical quantity calculating and energy calculate to the data that receive, 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 simulating 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 and described tested simulation electric energy meter/electric energy standard are sent; Realize and tested simulation table/electric energy full sized pules comparison, trace to the source thereby realize simulation electrical energy meter calibration/standard;
S02, digitalized electrical energy meter offline inspection: A/D analog to digital converter receives after simulating signal converts digital quantity to and sends to IEC61850 data modulator and DSP unit, IEC61850 data modulator connects, described digital quantity is carried out to communications protocol conversion, digital quantity signal is modulated, send chronologically the data message of described digital quantity signal corresponding format, described data message sends to off-line digital electric energy meter to be detected, the electrical energy impulse signals after metering is sent to Error Calculator by off-line digital electric energy meter, simultaneously, DSP unit carries out electrical quantity calculating and energy calculate and electrical energy impulse signals is sent to Error Calculator the data that receive, the electrical energy impulse signals of the pulse signal of the more described off-line digital electric energy meter output of Error Calculator and the metering output of DSP unit, 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 the electrical energy impulse signals that Error Calculator comparison step S01 simulation electric energy meter measures and the metering of step S02 digitalized electrical energy meter, realize simulation electric energy meter and digitalized electrical energy meter synchronization check and mutually compare.
9. a kind of novel analog standard scale and detection method with digitalized electrical energy meter measuring ability according to claim 8, it is characterized in that, also comprise that digitalized electrical energy meter detects online: on-the-spot merge cells is by voltage, current data message sends to IEC61850/FT3 data demodulator and online digitalized electrical energy meter, IEC61850/FT3 data demodulator receives IEC61850 message, restore original signal sampled value, described original signal sampled value is undertaken after energy calculate by DSP unit, be converted to pulse signal, send to Error Calculator, simultaneously, online digitalized electrical energy meter receives the voltage that on-the-spot merge cells sends, after current data message, electrical energy impulse signals after metering is sent to Error Calculator, the pulse signal of the DSP unit output described in pulse signal and this step of the more described line digitalized electrical energy meter output of Error Calculator, carry out electric energy error calculating.
10. a kind of novel analog standard scale and detection method with digitalized electrical energy meter measuring ability according to claim 8, it is characterized in that, also comprise the metering performance checking of DSP unit, IEC61850/FT3 message is sent to IEC61850/FT3 data demodulator by virtual standard source, IEC61850/FT3 data demodulator receives IEC61850/FT3 message, restore original signal sampled value, described original signal sampled value is carried out electric energy metrical and is sent respective electrical energy impulse to Error Calculator by DSP unit, virtual standard source outputting standard electrical energy pulse is to Error Calculator simultaneously, the electrical energy pulse of the more described DSP of Error Calculator unit metering and the standard electric energy impulse that carrys out self-virtualizing standard source, DSP energy calculate module precision is verified.
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| 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 |
| CN113985343A (en) * | 2021-12-30 | 2022-01-28 | 南京市计量监督检测院 | Online sampling inspection device for electric energy meter and application method thereof |
| 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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