CN203658570U - Portable calibrating device for digital electric energy metering device - Google Patents
Portable calibrating device for digital electric energy metering device Download PDFInfo
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- CN203658570U CN203658570U CN201320884812.8U CN201320884812U CN203658570U CN 203658570 U CN203658570 U CN 203658570U CN 201320884812 U CN201320884812 U CN 201320884812U CN 203658570 U CN203658570 U CN 203658570U
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Abstract
The utility model discloses a portable calibrating device for a digital electric energy metering device. A processing module is connected with a power amplification module. A power supply module is connected with the power amplification module. The power amplification module is connected with precise self-boosting voltage transformer and a precise self-current-rising current transformer. The precise self-boosting voltage transformer is connected with a standard meter, a voltage input end of the tested digital electric energy metering device and a feedback voltage input end of the power amplification module. Output ends of the self-current-rising current transformer are respectively connected with the standard meter, a current input end of the tested digital electric energy metering device and a feedback current input end of the power amplification module. The standard meter and a signal output end of the tested digital electric energy metering device are connected with an error calculating unit. The error calculating unit is connected with a processing module. The portable calibrating device for the digital electric energy metering device is capable of conveniently and quickly carrying out on-site calibration on the digital electric energy metering device in a digital substation, so that the working efficiency is improved.
Description
Technical field
The utility model relates to a kind of calibrating installation, relates in particular to the portable calibrating installation of a kind of digital electric power meter.
Background technology
Along with power electronic devices being widely used in electric system, electric energy metrical problem has become electric power system and the common focus of paying close attention to of user.At present, digital transformer substation is being brought into play vital effect to the application and development of electric energy, how composition error, current transformer ratio and the electric energy metrical of digital transformer substation numeral electric power meter are carried out to analysis and test, directly have influence on the use of electric energy both sides of supply and demand.As emerging transformer station's electric energy metered system, the research of digital transformer substation electric energy metered system just has more realistic meaning.Therefore, need to take rational measure to carry out the calibrating of global error performance synthesis to digital electric power meter, by accurately detect, evaluation and analysis, to improve work efficiency, accuracy and the reliability of electric energy metered system.
At present, the comprehensive electric parameter measurement equipment of electric energy such as electric energy calibrating installation tester on market, are emerged in multitude out, but on market, not yet there is in digital transformer substation the device that the digital electric power meter being made up of electronic mutual inductor and digital electricity meter is examined and determine.Conventional electronic mutual inductor field-checking equipment can not be common to the electric energy measurement of transformer station, directly causes staff to carry out field-checking to digital electric power meter in digital transformer substation, the serious work efficiency that has influence on.
Utility model content
The purpose of this utility model is to provide the portable calibrating installation of a kind of digital electric power meter, can carry out field-checking to digital electric power meter in digital transformer substation quickly and easily, increases work efficiency.
The utility model adopts following technical proposals:
The portable calibrating installation of a kind of digital electric power meter, comprise power module and processing module, the control signal output terminal of processing module connects the control signal input end of power amplifier module, the output terminal of power module connects the power input of power amplifier module, the signal output part of power amplifier module connects respectively from boosting accurate voltage mutual inductor and the signal input part from up-flow precision current transformer, from the output terminal voltage input end of connection standard table respectively of the accurate voltage mutual inductor that boosts, the feedback voltage input end of the voltage input end of digital electric power meter to be measured and power amplifier module, from output terminal current input terminal, the current input terminal of digital electric power meter to be measured and the feedback current input end of power amplifier module of connection standard table respectively of up-flow precision current transformer, the signal output part of standard scale and digital electric power meter to be measured is connected respectively the signal input part of error calculation unit, and the signal output part of error calculation unit connects the signal input part of processing module.
The described accurate voltage mutual inductor that certainly boosts comprises accurate voltage mutual inductor and stepup transformer, the voltage input end of accurate voltage mutual inductor secondary side output terminal connection standard table and the feedback voltage input end of power amplifier module, the output terminal of stepup transformer connects the voltage input end of digital electric power meter to be measured; Described comprises precision current transformer and current lifting device from up-flow precision current transformer, the current input terminal of precision current transformer secondary side output terminal connection standard table and the feedback current input end of power amplifier module, the output terminal of current lifting device connects the current input terminal of digital electric power meter to be measured.
Described power module adopts programmable power supply.
Described power amplifier module adopts program control power amplifier.
Also comprise load module and display module, the signal output part of load module connects the signal input part of processing module, and the signal output part of processing module connects the signal input part of display module.
Also comprise Main Control Tank, processing module and error calculation unit are arranged in Main Control Tank casing, and load module and display module are arranged on Main Control Tank case lid.
Also comprise power amplifier case, programmable power supply and program control power amplifier are all arranged in power amplifier case.
The described accurate voltage mutual inductor and be 0.01 grade from the precision of up-flow precision current transformer of certainly boosting.
Described standard scale adopts 0.02 grade of one way standard scale MDP1000.
The electric current that the utility model produces power module amplifies by power amplifier module, recycle and certainly boost accurate voltage mutual inductor and after up-flow precision current transformer boosts up-flow, be delivered to digital electric power meter to be measured, error calculation unit gathers the pulse signal that digital electric power meter to be measured and standard scale send simultaneously, and calculate the error of digital electric power meter to be measured by electric energy relative method, then deliver to processing module and process and display.The utility model can be realized the digital balance device of electronic mutual inductor and digital electricity meter composition is carried out to global error field-checking and composition error automatic calibration, complete the precise evaluation of digital electric power meter, have advantages of that volume is little, quality is light, integrated level is high, be convenient to on-the-spot use, can significantly reduce digital electric power meter field-checking labour intensity, increase work efficiency.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model.
Embodiment
As shown in Figure 1, the utility model comprises processing module, the control signal output terminal of processing module connects the control signal input end of power amplifier module, the output terminal of power module connects the power input of power amplifier module, the signal output part of power amplifier module connects respectively from boosting accurate voltage mutual inductor and the signal input part from up-flow precision current transformer, and the output terminal of the accurate voltage mutual inductor that certainly boosts is voltage input end, the voltage input end of digital electric power meter to be measured and the feedback voltage input end of power amplifier module of connection standard table respectively; From output terminal current input terminal, the current input terminal of digital electric power meter to be measured and the feedback current input end of power amplifier module of connection standard table respectively of up-flow precision current transformer, the signal output part of standard scale and digital electric power meter to be measured is connected respectively the signal input part of error calculation unit, and the signal output part of error calculation unit connects the signal input part of processing module.
Comprise accurate voltage mutual inductor and stepup transformer from the accurate voltage mutual inductor that boosts, the voltage input end of accurate voltage mutual inductor secondary side output terminal connection standard table and the feedback voltage input end of power amplifier module, the output terminal of stepup transformer connects the voltage input end of digital electric power meter to be measured.From the inner high pressure generator that adopts of the accurate voltage mutual inductor that boosts, can carry out dividing potential drop to the voltage transformer (VT) capacitive divider electric capacity of 10kV and following electric pressure, when under actual load when accurate voltage mutual inductor load error side-play amount >=0.013%, adopt error numeral to revise or bipolar voltage standard technique scheme; When under actual load when accurate voltage mutual inductor load error side-play amount >=0.1%, adopt secondary voltage to follow technical scheme.Voltage transformer (VT) load error test figure information, through voltage error signal feedback, feedback signal is transported to standard scale and is compared.Voltage change ratio from the accurate voltage mutual inductor that boosts is 1/64, and voltage is input as 156V, is output as 10kV; It is 0.01 grade from the accurate voltage mutual inductor precision of boosting.The voltage transformer (VT) that the present invention adopts is that HJ-S-10G1 is from boosting standard potential transformer, there is the characteristic of high voltage, pin-point accuracy, can realize verification 10KV, 0.01 grade of following voltage transformer (VT), can be with the secondary load of 0.25VA when 100V, can meet the requirement of voltage transformer (VT) calibrating completely.
HJ-S-10G1 is from boosting the technical indicator of standard potential transformer:
Rated voltage ratio: 10kV/100V, 10/ √ 3kV/100/ √ 3kV, 10/ √ 3kV/100/3kV
Specified secondary capacity: 0-0.25VA
φ=1.0
0.01 grade of accuracy grade, the in the situation that of rated load, in the time that voltage is 80%Un-120%Un, ratio is not more than 0.01%, and angular difference is not more than 2 ', in the time that voltage is 50%Un, ratio is not more than 0.075%, and angular difference is not more than 3 ', in the time that voltage is 20%Un, ratio is not more than 0.1%, and angular difference is not more than 6 '.Rated frequency: 50HZ.
Comprise precision current transformer and current lifting device from up-flow precision current transformer, the current input terminal of precision current transformer secondary side output terminal connection standard table and the feedback current input end of power amplifier module, the output terminal of current lifting device connects the current input terminal of digital electric power meter to be measured.From the inner high pressure generator that adopts of up-flow precision current transformer, can carry out measurement of technical parameter to 10kV and following electric pressure current transformer, or carry out rising test.Current transformer load error test figure information, through current error signal feedback, feedback signal is transported to standard scale and is compared.It is 0.01 grade from the precision of up-flow precision current transformer.From up-flow standard current transformer parameter be: when drive current is 0.6A, at the wiring output 5A of L1-L5 and L1-L6, current ratio 0.6/5=0.12; When drive current is 0.4A, at the wiring output 10A of L1-L3 and L1-L4, current ratio 0.4/10=0.04; When drive current is 0.148A, at the wiring output 10A of L1-L2, current ratio 0.148/10=0.0148; When drive current is 0.155A, at the wiring output 10A of punching, current ratio 0.155/10=0.0155 the present invention adopts HL-S2000A/5A from up-flow standard current transformer, and its structure is made up of winding and Secondary Winding.If current transformer has 5/5 or when 1/1 current ratio, can often carry out self-correcting.
HL-S2000A/5A is as follows from the technical indicator of up-flow standard current transformer:
Temperature :-5--+40 ° C;
Warm and humid: to be less than 80%;
Capacity: 1VA, cos φ=1;
Allow long-term work under rated current, the above punching of 600A;
Total amount: be less than 30 kg;
Normalized current ratio: 5-2000A/5A;
Accuracy rating: 0.01S level;
In the utility model, standard scale can adopt 0.02 grade of one way standard scale MDP1000, and power module can adopt programmable power supply, for driving the program control power amplifier of large capacity that plays up-flow boosting.The voltage source of programmable power supply is output as 160V, and current source is output as 0.6A to 10A, by certainly boosting standard potential transformer and realize different voltage and current gears from the different modes of connection of up-flow standard current transformer.
Power amplifier module can adopt program control power amplifier.Processing module is also connected with load module and display module, and the signal output part of load module connects the signal input part of processing module, and the signal output part of processing module connects the signal input part of display module.For the ease of carrying, the utility model also arranges Main Control Tank and power amplifier case, and processing module and error calculation unit are arranged in Main Control Tank casing, and processing module can adopt programmable controller.Load module and display module are arranged on Main Control Tank case lid, and load module can adopt keyboard, are convenient to staff and carry out input service; Display module can adopt LCD display.Programmable power supply and program control power amplifier are all arranged in power amplifier case.
The specification of program control power amplifier is as follows:
Voltage power amplifier: 1 grade of electric power output voltage, power amplifier output 0-156V, 0-10kV after boosting.Feedback voltage is taken from 100V or the 57.7V from the standard potential transformer that boosts.
Current amplification: the some shelves of current source output current, realize electric current gear according to the wiring combination from up-flow standard current transformer, power amplifier output 0.6A-10A, 5A-600A after up-flow.Feedback current is taken from the 5A from up-flow standard current transformer.
Power amplifier case selects size for 170*244*167CM, and material is aluminium alloy extrusions.
The utility model is in when work, the output signal of programmable power supply after program control power amplifier amplifies input from boosting accurate voltage mutual inductor and from up-flow precision current transformer.Precision current transformer and stream precision current transformer can produce the low-voltage of 57.7V and the low current of 5A, and send into standard scale and program control power amplifier; Meanwhile, stepup transformer and the current lifting device generation high pressure of 10kV and the electric current of 600A are delivered to digital electric power meter to be measured.When digital electric power meter work to be measured, can send digital electric energy impulse to error calculation unit, standard scale also sends a standard electric energy impulse number to error calculation unit, error calculation unit gathers the pulse signal that digital electric power meter to be measured and standard scale send simultaneously, and calculate the error of digital electric power meter to be measured by electric energy relative method, then deliver to processing module and process and display.Electric energy relative method belongs to the known technology of this area, does not repeat them here.
The utility model integration standard electric energy meter, error calculation unit, from the up-flow program control power amplifier of large capacity that boosts, the equipment such as programmable controller form the portable calibrating installation of digital electric power meter, can realize the digital balance device of electronic mutual inductor and digital electricity meter composition is carried out to global error field-checking and composition error automatic calibration, complete the precise evaluation of digital electric power meter, there is volume little, quality is light, integrated level is high, be convenient to the on-the-spot advantage using, can significantly reduce digital electric power meter field-checking labour intensity, increase work efficiency.
Claims (9)
1. the portable calibrating installation of digital electric power meter, it is characterized in that: comprise power module and processing module, the control signal output terminal of processing module connects the control signal input end of power amplifier module, the output terminal of power module connects the power input of power amplifier module, the signal output part of power amplifier module connects respectively from boosting accurate voltage mutual inductor and the signal input part from up-flow precision current transformer, from the output terminal voltage input end of connection standard table respectively of the accurate voltage mutual inductor that boosts, the feedback voltage input end of the voltage input end of digital electric power meter to be measured and power amplifier module, from output terminal current input terminal, the current input terminal of digital electric power meter to be measured and the feedback current input end of power amplifier module of connection standard table respectively of up-flow precision current transformer, the signal output part of standard scale and digital electric power meter to be measured is connected respectively the signal input part of error calculation unit, and the signal output part of error calculation unit connects the signal input part of processing module.
2. the portable calibrating installation of digital electric power meter according to claim 1, it is characterized in that: the described accurate voltage mutual inductor that certainly boosts comprises accurate voltage mutual inductor and stepup transformer, the voltage input end of accurate voltage mutual inductor secondary side output terminal connection standard table and the feedback voltage input end of power amplifier module, the output terminal of stepup transformer connects the voltage input end of digital electric power meter to be measured; Described comprises precision current transformer and current lifting device from up-flow precision current transformer, the current input terminal of precision current transformer secondary side output terminal connection standard table and the feedback current input end of power amplifier module, the output terminal of current lifting device connects the current input terminal of digital electric power meter to be measured.
3. the portable calibrating installation of digital electric power meter according to claim 2, is characterized in that: described power module adopts programmable power supply.
4. the portable calibrating installation of digital electric power meter according to claim 3, is characterized in that: described power amplifier module adopts program control power amplifier.
5. the portable calibrating installation of digital electric power meter according to claim 4, it is characterized in that: also comprise load module and display module, the signal output part of load module connects the signal input part of processing module, and the signal output part of processing module connects the signal input part of display module.
6. the portable calibrating installation of digital electric power meter according to claim 5, is characterized in that: also comprise Main Control Tank, processing module and error calculation unit are arranged in Main Control Tank casing, and load module and display module are arranged on Main Control Tank case lid.
7. the portable calibrating installation of digital electric power meter according to claim 6, is characterized in that: also comprise power amplifier case, programmable power supply and program control power amplifier are all arranged in power amplifier case.
8. the portable calibrating installation of digital electric power meter according to claim 7, is characterized in that: the described accurate voltage mutual inductor and be 0.01 grade from the precision of up-flow precision current transformer of certainly boosting.
9. the portable calibrating installation of digital electric power meter according to claim 8, is characterized in that: described standard scale adopts 0.02 grade of one way standard scale MDP1000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320884812.8U CN203658570U (en) | 2013-12-30 | 2013-12-30 | Portable calibrating device for digital electric energy metering device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320884812.8U CN203658570U (en) | 2013-12-30 | 2013-12-30 | Portable calibrating device for digital electric energy metering device |
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| CN203658570U true CN203658570U (en) | 2014-06-18 |
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| CN201320884812.8U Expired - Fee Related CN203658570U (en) | 2013-12-30 | 2013-12-30 | Portable calibrating device for digital electric energy metering device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105044641A (en) * | 2015-06-30 | 2015-11-11 | 黑龙江省计量检定测试院 | Electric vehicle charging metering instrument field calibration device |
| CN106405473A (en) * | 2016-08-29 | 2017-02-15 | 中国电力科学研究院 | Radiation immunity electromagnetic compatibility test system applicable to high voltage metering equipment and radiation immunity electromagnetic compatibility test method |
| CN106787783A (en) * | 2017-01-06 | 2017-05-31 | 云南电网有限责任公司电力科学研究院 | A kind of Wide Band Power origin system |
| CN107748348A (en) * | 2017-11-30 | 2018-03-02 | 国网安徽省电力公司淮南供电公司 | The high-voltage electric energy meter calibrating installation that can integrally trace to the source |
| CN110058188A (en) * | 2019-05-24 | 2019-07-26 | 国网江苏省电力有限公司镇江供电分公司 | The active detector of electric energy metering device |
| CN113702896A (en) * | 2021-07-13 | 2021-11-26 | 中国电力科学研究院有限公司 | System and method for measuring error of direct current electric energy standard meter based on voltage reference |
-
2013
- 2013-12-30 CN CN201320884812.8U patent/CN203658570U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105044641A (en) * | 2015-06-30 | 2015-11-11 | 黑龙江省计量检定测试院 | Electric vehicle charging metering instrument field calibration device |
| CN106405473A (en) * | 2016-08-29 | 2017-02-15 | 中国电力科学研究院 | Radiation immunity electromagnetic compatibility test system applicable to high voltage metering equipment and radiation immunity electromagnetic compatibility test method |
| CN106405473B (en) * | 2016-08-29 | 2024-03-19 | 中国电力科学研究院 | Radiation immunity electromagnetic compatibility testing system and method suitable for high-voltage metering equipment |
| CN106787783A (en) * | 2017-01-06 | 2017-05-31 | 云南电网有限责任公司电力科学研究院 | A kind of Wide Band Power origin system |
| CN106787783B (en) * | 2017-01-06 | 2023-09-15 | 云南电网有限责任公司电力科学研究院 | Broadband power source system |
| CN107748348A (en) * | 2017-11-30 | 2018-03-02 | 国网安徽省电力公司淮南供电公司 | The high-voltage electric energy meter calibrating installation that can integrally trace to the source |
| CN110058188A (en) * | 2019-05-24 | 2019-07-26 | 国网江苏省电力有限公司镇江供电分公司 | The active detector of electric energy metering device |
| CN113702896A (en) * | 2021-07-13 | 2021-11-26 | 中国电力科学研究院有限公司 | System and method for measuring error of direct current electric energy standard meter based on voltage reference |
| CN113702896B (en) * | 2021-07-13 | 2024-04-19 | 中国电力科学研究院有限公司 | System and method for measuring direct-current electric energy standard meter error based on voltage reference |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20211230 |