CN104316897A - Detection device for three-phase multifunctional watt-hour meter - Google Patents
Detection device for three-phase multifunctional watt-hour meter Download PDFInfo
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- CN104316897A CN104316897A CN201410593158.4A CN201410593158A CN104316897A CN 104316897 A CN104316897 A CN 104316897A CN 201410593158 A CN201410593158 A CN 201410593158A CN 104316897 A CN104316897 A CN 104316897A
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Abstract
The invention discloses a detection device for a three-phase multifunctional watt-hour meter. The detection device comprises a steady current and voltage source, a sampling device, a distributive error calculator, a power source and overload automatic protection circuit, a standard meter, a detected meter, a control system, a communication system and a time base frequency meter which are integrated. By means of the detection device for the three-phase multifunctional watt-hour meter, most of manually-operated detection steps are omitted. Meanwhile, the detection device for the three-phase multifunctional watt-hour meter is safe, low in cost, high in automation degree and capable of greatly increasing detection efficiency and reliability.
Description
Technical field
The present invention relates to a kind of verifying attachment of ammeter, particularly relate to a kind of verifying attachment of Three-phase multi-functional meter.
Background technology
Three-phase multi-functional meter is the product being specifically designed to the electric energy measurement realized in distribution system, electric energy management; for high and low voltage electric distribution system provides a general intelligent solution; by measuring multiple electric parameter, distribution system is monitored; and there is the functions such as change is sent, added up, communication; improve power supply reliability and service efficiency; be widely used in the industries such as commercial building, thermoelectricity, water power, iron and steel, petrochemical industry, metallurgy, for whole distribution and power system provide safe and reliable and efficient control and protection.
As the verifying attachment of a kind of verifying attachment of ammeter, particularly Three-phase multi-functional meter, its Main Function is the checking procedure simplifying product, enhances productivity, and reduces human operational error, reduces production testing cost etc.General survey device is all actual functional capability according to multifunction electric meter and requirement, and specific customization forms, in the industry not consensus.
In current industry, corresponding multifunction electric meter inspection generally adopts two schemes: manually with automatic.Manual inspections, adopt hand fit's signal source and checkout equipment to test, this mode needs have high input part manpower and time, and often check an ammeter all to want manual wiring, complex steps, and testing accuracy is low, poor reliability, efficiency production capacity is low; Automatic gauging, then adopt electronic type control program to test, although automaticity improves, the production cost of verifying attachment is too high, and also relatively stricter to environmental requirement, complicated operation, designing requirement is high.
So how innovation and creation go out the verifying attachment of a practical Three-phase multi-functional meter, it is the fundamental purpose of this patent.
Summary of the invention
The object of the invention is the verifying attachment devising a kind of Three-phase multi-functional meter, not only eliminate most of manually-operated checking procedure, simultaneously compromise between security, cost is low, and automaticity is high, greatly improves checkability and reliability.
For achieving the above object, the invention provides a kind of Three-phase multi-functional meter verifying attachment, it is characterized in that, comprise steady current voltage source, sampling thief, distributed Error Calculator, power supply and automatic overload protection circuit, standard scale, tested table, control system, communication system, timebase frequency instrument, wherein, described steady current voltage source is responsible for providing three-phase current voltage source to described standard scale and described tested table, described three-phase current voltage source flows through described standard scale to described distributed Error Calculator, the described three-phase current voltage source of input is exported to described sampling thief by described tested table, export described distributed Error Calculator again to, the signal of described standard scale and described tested table is carried out distributed error calculation by described distributed Error Calculator, calculate the error of described tested table, and testing result is consigned to described control system by described communication system, the described three-phase current voltage source flowing through described standard scale and described tested table flows back to described steady current voltage source again, feedback compensation and adjustment is carried out by the circuit of inside, described steady current voltage source can pass through external keyboard or PC, via described communication system and described control system, it is carried out to the setting of signal source, described power supply and automatic overload protection circuit primary responsibility provide working power to described control system, and give described steady current voltage source original source signal is provided, and provide automatic overload protection function to described Three-phase multi-functional meter verifying attachment.
Wherein, described standard scale adopts high-speed dsp, CPLD and MPU, and is with self-correcting A/D function, and can carry out high-speed sampling and computing to AC signal, accuracy relative error is less than 0.05%DR.
Described Three-phase multi-functional meter verifying attachment, also comprises built-in timebase frequency instrument, and function when described timebase frequency instrument possesses gps satellite school, can carry out real time correction to described communication system, avoid the time error in metering process.
In the present invention, described steady current voltage source, adopt direct digital synthesizers signalling technique, with programmable digital logic array chip and single-chip microcomputer for core, composition digit synthesis sine signal source, digital quantity parameter is stored in specific storer, is changed and obtain after low-pass filtering by six way weighted-voltage D/A converters.
Described standard scale 5 provides output Real-Time Monitoring, the Three-phase multi-functional meter that wherein said tested table 6 is namely to be measured.
Described Three-phase multi-functional meter verifying attachment adopts split-type structural, comprise meter hanging frame and device stage body, wherein said meter hanging frame is structurally separated with described device stage body, described device stage body adopts vertical standard cabinet, and only have electrical connection between described meter hanging frame, described meter hanging frame designs every batch can hang 36 tested tables simultaneously.
Described steady current voltage source comprises digital synthesis signal source, current amplification, voltage power amplifier, current lifting device, stepup transformer, current transformation and voltage transformation, the power source transition that outside is accessed is become three-phase current voltage signal by wherein said digital synthesis signal source, the electric current generated and voltage signal, described current amplification is delivered to and described voltage power amplifier carries out power amplification respectively by respective feedback compensation Circuit tuning, again by described current lifting device and described stepup transformer, after described current transformation and voltage transformation, export three-phase current voltage source, supply described standard scale and described tested table use, the electric current exported and voltage are again through feedback sample mutual inductor sample, feed back to the described feedback compensation Circuit tuning of described current amplification and voltage power amplifier prime.
Three-phase multi-functional meter verifying attachment of the present invention has following technique effect:
1. verifying attachment accuracy relative error 0.05%DR.
2. can check 36 Three-phase multi-functional meter simultaneously.
3. signal source precision and fineness adjustable, stable output, degree of distortion is low.
4. function modoularization design, reduces costs.
5. software function is powerful, human oriented design interface, simple to operate, and provides multiple survey report form to select.
Be described further below with reference to the technique effect of accompanying drawing to design of the present invention, concrete structure and generation, to understand object of the present invention, characteristic sum effect fully.
Accompanying drawing explanation
Fig. 1 is the system chart of Three-phase multi-functional meter verifying attachment of the present invention.
Fig. 2 is the fundamental diagram that the present invention adopts the digital synthesis signal source of steady current voltage source.
Embodiment
Three-phase multi-functional meter verifying attachment of the present invention, adopts standard electric energy meter method direct comparison principle calibrating electric energy meter.Three-phase multi-functional meter verifying attachment is made up of the steady current voltage source 1 of integration, sampling thief 2, distributed Error Calculator 3, power supply and automatic overload protection circuit 4, standard scale 5, tested table 6, control system 7, communication system 8, further comprises timebase frequency instrument 9.Verifying attachment system chart as shown in Figure 1.
Steady current voltage source 1 is responsible for providing three-phase current voltage source to standard scale 5 and tested table 6, i.e. Ia, Ib, Ic, Ua, Ub, Uc in Fig. 1, three-phase current voltage source flows through standard scale 5 to distributed Error Calculator 3, the three-phase current voltage source of input is exported to sampling thief 2 by tested table 6, export distributed Error Calculator 3 again to, the signal of standard scale 5 and tested table 6 is carried out distributed error calculation by distributed Error Calculator 3, calculate tested table 6 error, and testing result is consigned to control system 7 by communication system 8.The three-phase current voltage source flowing through standard scale 5 and tested table 6 flows back to steady current voltage source 1 again, carries out feedback compensation and adjustment by the circuit of inside.Steady current voltage source 1 can pass through external keyboard or PC; via communication system 8 and control system 7; it is carried out to the setting of signal source; power supply and automatic overload protection circuit 4 primary responsibility provide working power to control system 7; and the original source signal of steady current voltage source 1, and provide automatic overload protection function to whole system.
Wherein, standard scale 5 adopts high-speed dsp, CPLD and MPU, and is with self-correcting A/D function, and can carry out high-speed sampling and computing to AC signal, accuracy relative error is less than 0.05%DR.Function when the built-in timebase frequency instrument 9 of device possesses gps satellite school, can carry out real time correction to communication system 8, avoid the time error in metering process.
Steady current voltage source 1 in Three-phase multi-functional meter verifying attachment, adopt advanced direct digital synthesizers signalling technique, with programmable digital logic array chip and single-chip microcomputer for core, composition digit synthesis sine signal source, digital quantity parameter is stored in specific storer, is changed and obtain after low-pass filtering by six way weighted-voltage D/A converters.The equal software-controllable of signal source, can be controlled by keyboard or PC, realizes the POL requirement that ammeter inspection institute needs.The high stability dc of standard phase-locked loop circuit and digital to analog converter, with reference to base, ensure that the long-time stability of output signal.
Standard scale 5 in Three-phase multi-functional meter verifying attachment provides output Real-Time Monitoring.The Three-phase multi-functional meter that tested table 6 is namely to be measured.
Three-phase multi-functional meter verifying attachment adopts split-type structural, and comprise meter hanging frame and device stage body, wherein meter hanging frame is structurally separated with device stage body.Device stage body adopts vertical standard cabinet, and only has electrical connection between meter hanging frame, and meter hanging frame designs every batch can hang 36 tested tables simultaneously.
Three-phase multi-functional meter verifying attachment, is characterized in that, described steady current voltage source comprises digital synthesis signal source, current amplification, voltage power amplifier, current lifting device, stepup transformer, current transformation and voltage transformation.Digital synthesis signal source 10, as the core component of steady current voltage source 1 inside, becomes three-phase current voltage signal by the power source transition that outside is accessed.The electric current generated and voltage signal, current amplification 11 is delivered to and voltage power amplifier 12 carries out power amplification respectively by respective feedback compensation Circuit tuning, again by current lifting device 13 and stepup transformer 14, after current transformation 15 and voltage transformation 16, export Ia, Ib, Ic, Ua, Ub, Uc, as three-phase current voltage source, pay standard table 5 and tested table 6 use.The electric current exported and voltage, again through feedback sample mutual inductor sample, feed back to the feedback compensation Circuit tuning of current amplification and voltage power amplifier prime.Digital synthesis signal source fundamental diagram, as shown in Figure 2.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all technician in the art, all should by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (7)
1. a Three-phase multi-functional meter verifying attachment, it is characterized in that, comprise steady current voltage source, sampling thief, distributed Error Calculator, power supply and automatic overload protection circuit, standard scale, tested table, control system, communication system, wherein, described steady current voltage source is responsible for providing three-phase current voltage source to described standard scale and described tested table, described three-phase current voltage source flows through described standard scale to described distributed Error Calculator, the described three-phase current voltage source of input is exported to described sampling thief by described tested table, export described distributed Error Calculator again to, the signal of described standard scale and described tested table is carried out distributed error calculation by described distributed Error Calculator, calculate the error of described tested table, and testing result is consigned to described control system by described communication system, the described three-phase current voltage source flowing through described standard scale and described tested table flows back to described steady current voltage source again, feedback compensation and adjustment is carried out by the circuit of inside, described steady current voltage source can pass through external keyboard or PC, via described communication system and described control system, it is carried out to the setting of signal source, described power supply and automatic overload protection circuit primary responsibility provide working power to described control system, and give described steady current voltage source original source signal is provided, and provide automatic overload protection function to described Three-phase multi-functional meter verifying attachment.
2. Three-phase multi-functional meter verifying attachment as claimed in claim 1, it is characterized in that, described standard scale adopts high-speed dsp, CPLD and MPU, and is with self-correcting A/D function, can carry out high-speed sampling and computing to AC signal, accuracy relative error is less than 0.05%DR.
3. Three-phase multi-functional meter verifying attachment as claimed in claim 1, it is characterized in that, also comprise built-in timebase frequency instrument, function when described timebase frequency instrument possesses gps satellite school, real time correction can be carried out to described communication system, avoid the time error in metering process.
4. Three-phase multi-functional meter verifying attachment as claimed in claim 1, it is characterized in that, described steady current voltage source, adopt direct digital synthesizers signalling technique, with programmable digital logic array chip and single-chip microcomputer for core, composition digit synthesis sine signal source, digital quantity parameter is stored in specific storer, is changed and obtain after low-pass filtering by six way weighted-voltage D/A converters.
5. Three-phase multi-functional meter verifying attachment as claimed in claim 1, it is characterized in that, described standard scale 5 provides output Real-Time Monitoring, the Three-phase multi-functional meter that wherein said tested table 6 is namely to be measured.
6. Three-phase multi-functional meter verifying attachment as claimed in claim 1, it is characterized in that, described Three-phase multi-functional meter verifying attachment adopts split-type structural, comprise meter hanging frame and device stage body, wherein said meter hanging frame is structurally separated with described device stage body, described device stage body adopts vertical standard cabinet, and only has electrical connection between described meter hanging frame, and described meter hanging frame designs every batch can hang 36 tested tables simultaneously.
7. Three-phase multi-functional meter verifying attachment as claimed in claim 1, it is characterized in that, described steady current voltage source comprises digital synthesis signal source, current amplification, voltage power amplifier, current lifting device, stepup transformer, current transformation and voltage transformation, the power source transition that outside is accessed is become three-phase current voltage signal by wherein said digital synthesis signal source, the electric current generated and voltage signal, described current amplification is delivered to and described voltage power amplifier carries out power amplification respectively by respective feedback compensation Circuit tuning, again by described current lifting device and described stepup transformer, after described current transformation and voltage transformation, export three-phase current voltage source, supply described standard scale and described tested table use, the electric current exported and voltage are again through feedback sample mutual inductor sample, feed back to the described feedback compensation Circuit tuning of described current amplification and voltage power amplifier prime.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410593158.4A CN104316897A (en) | 2014-10-29 | 2014-10-29 | Detection device for three-phase multifunctional watt-hour meter |
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| CN201410593158.4A CN104316897A (en) | 2014-10-29 | 2014-10-29 | Detection device for three-phase multifunctional watt-hour meter |
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| CN201410593158.4A Pending CN104316897A (en) | 2014-10-29 | 2014-10-29 | Detection device for three-phase multifunctional watt-hour meter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106772208A (en) * | 2016-12-30 | 2017-05-31 | 杭州海兴电力科技股份有限公司 | A kind of integrated reliability testing platform of single three-phase meter |
| CN106959428A (en) * | 2017-03-31 | 2017-07-18 | 中国电力科学研究院 | Electrical energy meter fault exciting test device |
| WO2018059505A1 (en) * | 2016-09-28 | 2018-04-05 | 德布森电气（上海）有限公司 | Three-phase voltage self-resetting module detection apparatus |
| CN112034414A (en) * | 2020-09-09 | 2020-12-04 | 南方电网科学研究院有限责任公司 | Self-adaptive sampling method, system and equipment for core board of electric meter |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2018059505A1 (en) * | 2016-09-28 | 2018-04-05 | 德布森电气（上海）有限公司 | Three-phase voltage self-resetting module detection apparatus |
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| CN106959428A (en) * | 2017-03-31 | 2017-07-18 | 中国电力科学研究院 | Electrical energy meter fault exciting test device |
| CN112034414A (en) * | 2020-09-09 | 2020-12-04 | 南方电网科学研究院有限责任公司 | Self-adaptive sampling method, system and equipment for core board of electric meter |
| CN112034414B (en) * | 2020-09-09 | 2022-08-30 | 南方电网科学研究院有限责任公司 | Self-adaptive sampling method, system and equipment for core board of electric meter |
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Application publication date: 20150128 |