CN101281243B - Device and method for testing equipotential closed loop electrical energy meter - Google Patents
Device and method for testing equipotential closed loop electrical energy meter Download PDFInfo
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- CN101281243B CN101281243B CN2008100673114A CN200810067311A CN101281243B CN 101281243 B CN101281243 B CN 101281243B CN 2008100673114 A CN2008100673114 A CN 2008100673114A CN 200810067311 A CN200810067311 A CN 200810067311A CN 101281243 B CN101281243 B CN 101281243B
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Abstract
The invention provides an equipotential closed-loop electrical energy meter testing device, which includes a program controlled three phase power source, a three phase multifunction standard meter, a meter hanging rack, an error calculation/display apparatus, a control system equipped with control software, and a precision current mutual inductor CT insulating the current of the electric energy meter connected to the meter hanging rack, wherein, the program controlled three phase power source outputs voltage to the three phase multifunction standard meter and the electrical energy meter to be tested connected to the meter hanging rack; the program controlled three phase power source outputs current to the three phase multifunction standard meter and the electrical energy meter to be tested through the precision current mutual inductor CT; the error calculation/display apparatus is connected with the three phase multifunction standard meter and the electrical energy meter to be tested; the control system is connected with the program controlled three phase power source, the three phase multifunction standard meter, the electrical energy meter to be tested and the error calculation/display apparatus. The equipotential closed-loop electrical energy meter testing device provided by the invention can verify more electrical energy meters at one time, thereby improving work efficiency of the measurement department and reducing error.
Description
[technical field]
The present invention relates to the verifying attachment of three equal potentials, closed loop electrical energy meter, relate in particular to the device that multilist is detected simultaneously by precision current mutual inductor CT.
[background technology]
In electric system, various electric energy meters need carry out verification to its electric energy metering error before networking, and the electric energy meter that electric energy error is qualified just allows to network and uses, because of the use amount of electric energy meter big.And can not separate with current terminal owing to the high-end terminal of its voltage for three equal potentials, closed loop electrical energy meter, therefore general verifying attachment all can only be checked one three equal potentials, closed loop electrical energy meter when check, influence between bigger epi-position and when check polylith three equal potentials, closed loop electrical energy meter, will produce, increase electric energy error.
[summary of the invention]
In order to solve above-mentioned deficiency of the prior art, the invention provides a kind of verifying attachment of equipotential closed loop electrical energy meter, solving in the prior art between the epi-position that generation is bigger when detecting at multilist influences the problem that electric energy error is bigger.
The present invention is achieved by the following technical solutions: design, a kind of equipotential closed loop electrical energy meter verifying attachment of manufacturing comprise program control three phase power source, three-phase multifunctional standard scale, meter hanging frame, Error Calculation/display, are provided with the control system of Control Software and the precision current mutual inductor CT that isolates meter hanging frame epi-position electric current; Described program control three phase power source output voltage is given described three-phase multifunctional standard scale and the detected electric energy meter that is connected on the described meter hanging frame; Described program control three phase power source output current is given described three-phase multifunctional standard scale and is passed through the detected electric energy meter of precision current mutual inductor CT; Described Error Calculation/display connects described three-phase multifunctional standard scale and detected electric energy meter; Described control system is connected with described program control three phase power source, described three-phase multifunctional standard scale, described detected electric energy meter and described Error Calculation/display.
According to a preferred embodiment of the present invention, described detected electric energy meter comprises three-phase equipotential electric energy table, closed loop electrical energy meter and non-equipotential electric energy table.
According to a preferred embodiment of the present invention, described Error Calculation/display comprises and can gather standard electric energy impulse and detected electrical energy pulse and the counter that can handle accordingly and can gather the timer and the display screen of the continuous standard electric energy impulse cycle pulsewidth of measurement.
According to a preferred embodiment of the present invention, described precision current mutual inductor CT and described detected electric energy meter are connected by mode one to one.
According to a preferred embodiment of the present invention, described precision current mutual inductor CT is corresponding with described detected electric energy meter; Described detected electric energy meter is one or more detected electric energy meters.
According to a preferred embodiment of the present invention, the input end of described precision current mutual inductor CT and output terminal carry out difference by current compensation circuit and amplify compensation automatically.
A kind of method of inspection of equipotential closed loop electrical energy meter, the described method of inspection may further comprise the steps:
The control system of the above-mentioned equipotential closed loop electrical energy meter of step 100 verifying attachment is set relevant parameter, described relevant parameter set comprise control system by the current output journey of examination requirements by the current value control control precision current mutual inductor CT that is provided with, set program control three phase power source output voltage, current signal, the limits of error and the current output journey by the current value control control precision current mutual inductor CT that is provided with;
The processing of the Error Calculation/display pulse signals of the above-mentioned equipotential closed loop electrical energy meter of step 200 verifying attachment;
The control system of the above-mentioned equipotential closed loop electrical energy meter of step 300 verifying attachment is carried out verification by the verification standard to detected electric energy meter.
According to a preferred embodiment of the present invention, described step 200 specifically comprises following step:
Step 201 electric energy error calculating/display is gathered the pulse information of three-phase multifunctional standard scale and detected electric energy meter;
Step 202 electric energy error calculating/display carries out electric energy error and calculates;
Step 203 electric energy error calculating/display return error result is to control system.
According to a preferred embodiment of the present invention, the pulse information in the described step 201 comprises number and each periodic width of described three-phase multifunctional standard scale and described detected electric energy meter.
According to a preferred embodiment of the present invention, the pulse error amount that returns according to Error Calculation/display of being verified as in the described step 300 and the default limits of error compare.
The invention has the beneficial effects as follows: the verifying attachment of three equal potentials provided by the invention, closed loop electrical energy meter, adopt precision current mutual inductor CT, providing between less epi-position influences, reduce electric energy error, the multi-epitope that solves three equal potentials, closed loop electrical energy meter is simultaneously checked compatible non-equipotential electric energy table check, has improved gage work personnel's efficient and has improved the accuracy of checking.
[description of drawings]
Fig. 1 is the example block diagram of calibrator for watt-hour meter of the present invention.
Fig. 2 is the current direction synoptic diagram of precision current mutual inductor CT in the calibrator for watt-hour meter of the present invention.
Fig. 3 is the overview flow chart of the method for inspection of calibrator for watt-hour meter of the present invention.
[embodiment]
Below in conjunction with the drawings and specific embodiments, the invention is further described.
A kind of equipotential closed loop electrical energy meter verifying attachment, as Fig. 1, comprise program control three phase power source 1, three-phase multifunctional standard scale 2, it is characterized in that: also comprise meter hanging frame, Error Calculation/display 3 is provided with the control system 4 of Control Software and the precision current mutual inductor CT 5 that isolates meter hanging frame epi-position electric current; Described program control three phase power source 1 output voltage is given described three-phase multifunctional standard scale 2 and the detected electric energy meter 6 that is connected on the described meter hanging frame; Described program control three phase power source 1 output current is given described three-phase multifunctional standard scale 2 and is passed through the detected electric energy meter 6 of described precision current mutual inductor CT 5; Described Error Calculation/display 3 connects described three-phase multifunctional standard scale 2 and detected electric energy meter 6; Described control system 4 is connected with described program control three phase power source 1, described three-phase multifunctional standard scale 2, described detected electric energy meter 6 and described Error Calculation/display 3.
Described accurate CT is the precision current mutual inductor, adopts 100A/5A double-range mode to guarantee little current technique index.
Among a kind of embodiment, as Fig. 2, described precision current mutual inductor CT 5 is by input 0-5A alternating current, output divides 5A, two ranges of 100A, meet the requirement of calibrator for watt-hour meter for the technical indicator that guarantees each range, in precision current mutual inductor CT, adopt current compensation circuit, by the sampling output terminal, the input end electric current carries out difference and amplifies compensation automatically to output terminal, electric current output 5A, the Control Software of establishing in the selection of 100A range divides with described control system 4 requires to automatically switch and require manual switchover according to output current under disengaged position according to output, guarantees the accuracy of output current.Electric current is being through isolating through described precision current mutual inductor CT 5 before being verified electric energy meter, avoided because electric current and voltage is connected together the error that causes to bring in the system, thereby guarantees the error consistency of each epi-position.
Described Error Calculation/display 3 comprises can be gathered standard electric energy meter pulse and detected electric energy meter pulse and the counter that can handle accordingly and can gather timer and the display screen of measuring continuous standard electric energy impulse cycle pulsewidth.Described counter is used for the pulse information that receives is calculated and add up and do corresponding processing, described timer is mainly used in the pulsewidth of collection period, and the information of the number of electric energy error information, pulse and pulsewidth will show on described display screen, conveniently checks.
Described precision current mutual inductor CT 5 is corresponding with described detected electric energy meter 6, promptly connects by mode one to one; Described detected electric energy meter 6 is one or more described detected electric energy meters 6.A plurality of described detected electric energy meters 6 can be inserted in these pick-up units, a plurality of described detected electric energy meters 6 can disposablely be connected in this pick-up unit and detect, and check whether compliant of detected electric energy meter.Described detected electric energy meter 6 is three-phase equipotential electric energy table, closed loop electrical energy meter or non-equipotential electric energy table and their combination.
A kind of method of inspection of equipotential closed loop electrical energy meter, as Fig. 3, the described method of inspection may further comprise the steps:
The control system of the above-mentioned equipotential closed loop electrical energy meter of step 100 verifying attachment is set relevant parameter;
The processing of the Error Calculation/display pulse signals of the above-mentioned equipotential closed loop electrical energy meter of step 200 verifying attachment;
The control system of the above-mentioned equipotential closed loop electrical energy meter of step 300 verifying attachment is carried out verification by the verification standard to detected electric energy meter.
Relevant parameter described in the described step 100 set comprise control system by the current output journey of examination requirements by the current value control control precision current mutual inductor CT that is provided with, set program control three phase power source output voltage, current signal, the limits of error and the current output journey by the current value control control precision current mutual inductor CT that is provided with.Before carrying out parameter setting, need to check relevant hardware and whether start,, then need to start relevant hardware, comprise Error Calculation/display, the three-phase multifunctional standard scale if be not activated.
Described step 200 specifically comprises following step:
Step 201 electric energy error calculating/display is gathered the pulse information of three-phase multifunctional standard scale and detected electric energy meter;
Step 202 electric energy error calculating/display carries out electric energy error and calculates;
Step 203 electric energy error calculating/display return error result is to control system.
Pulse information in the described step 201 comprises number and each periodic width of described three-phase multifunctional standard scale and described detected electric energy meter.
The pulse error amount that being verified as in the described step 300 returned according to Error Calculation/display and the default limits of error compare.
Electric energy error calculating/display is at first gathered the pulse information in three-phase standard electric energy meter and the detected electric energy meter, and the cycle pulsewidth of the number of paired pulses, pulse is analyzed then, simultaneously electric energy error is calculated.Some essential informations of result calculated and pulse are shown on display screen, by error amount is turned back in the control system, described control system is converted to identifiable information by conversion with error amount and compares with the limits of error of presetting, if the error amount that detected electric energy meter returns is also bigger than the max value of error of setting, illustrate that then this is verified electric energy meter and does not meet standard, otherwise then explanation is verified the electric energy meter compliant.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (9)
1. equipotential closed loop electrical energy meter verifying attachment, comprise program control three phase power source (1), three-phase multifunctional standard scale (2), it is characterized in that: also comprise meter hanging frame, Error Calculation/display (3), be provided with the control system (4) of Control Software and the precision current mutual inductor CT (5) that isolates meter hanging frame epi-position electric current; Described program control three phase power source (1) output voltage is given described three-phase multifunctional standard scale (2) and is connected in detected electric energy meter (6) on the described meter hanging frame; Described program control three phase power source (1) output current is given described three-phase multifunctional standard scale (2) and is passed through the detected electric energy meter (6) of described precision current mutual inductor CT (5); Described Error Calculation/display (3) connects described three-phase multifunctional standard scale (2) and detected electric energy meter (6); Described control system (4) is connected with described program control three phase power source (1), described three-phase multifunctional standard scale (2), described detected electric energy meter (6) and described Error Calculation/display (3).
2. equipotential closed loop electrical energy meter verifying attachment according to claim 1 is characterized in that: described detected electric energy meter (6) comprises three-phase equipotential electric energy table, closed loop electrical energy meter or non-equipotential electric energy table.
3. equipotential closed loop electrical energy meter verifying attachment according to claim 1 and 2 is characterized in that: described Error Calculation/display (3) comprises can be gathered standard electric energy meter pulse and detected electric energy meter pulse and the counter that can handle accordingly and can gather timer and the display screen of measuring continuous standard electric energy impulse cycle pulsewidth.
4. equipotential closed loop electrical energy meter verifying attachment according to claim 1 is characterized in that: described precision current mutual inductor CT (5) and described detected electric energy meter (6) are connected by mode one to one.
5. according to claim 1 or 4 described equipotential closed loop electrical energy meter verifying attachments, it is characterized in that: the input end of described precision current mutual inductor CT (5) and output terminal carry out difference by current compensation circuit and amplify compensation automatically.
6. method of inspection of using the described equipotential closed loop electrical energy meter of claim 1 verifying attachment, it is characterized in that: the described method of inspection may further comprise the steps:
Control system on the described equipotential closed loop electrical energy meter of step 100 claim 1 verifying attachment is set relevant parameter, described relevant parameter set comprise described control system by examination requirements by the current output journey of the current value control precision current mutual inductor CT that is provided with, the current output journey of setting program control three phase power source output voltage, current signal, the limits of error and controlling described precision current mutual inductor CT by the current value that is provided with;
The processing of the Error Calculation/display pulse signals on the described equipotential closed loop electrical energy meter of step 200 claim 1 verifying attachment;
Control system on the described equipotential closed loop electrical energy meter of step 300 claim 1 verifying attachment is carried out verification by the verification standard to detected electric energy meter.
7. the method for inspection according to claim 6 is characterized in that: described step 200 specifically comprises following step:
Step 201 Error Calculation/display is gathered the pulse information of three-phase multifunctional standard scale and detected electric energy meter;
Step 202 electric energy error calculating/display carries out electric energy error and calculates;
Step 203 electric energy error calculating/display return error result is to control system.
8. the method for inspection according to claim 7 is characterized in that: the pulse information in the described step 201 comprises number and each periodic width of described three-phase multifunctional standard scale and described detected electric energy meter.
9. the method for inspection according to claim 6 is characterized in that: the pulse error amount that being verified as in the described step 300 returned according to Error Calculation/display and the default limits of error compare.
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| CN2008100673114A CN101281243B (en) | 2008-05-20 | 2008-05-20 | Device and method for testing equipotential closed loop electrical energy meter |
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| CN2008100673114A CN101281243B (en) | 2008-05-20 | 2008-05-20 | Device and method for testing equipotential closed loop electrical energy meter |
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| CN101281243A CN101281243A (en) | 2008-10-08 |
| CN101281243B true CN101281243B (en) | 2011-09-07 |
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| CN101907694B (en) * | 2010-07-09 | 2013-03-20 | 深圳市科陆电子科技股份有限公司 | Device and method for testing low-voltage collecting meter reading system |
| CN101957440B (en) * | 2010-08-23 | 2013-01-30 | 太原市优特奥科电子科技有限公司 | Error amount value verification device and error amount value transfer method of digital electric energy meter |
| CN101915903B (en) * | 2010-09-08 | 2013-06-12 | 珠海中慧微电子有限公司 | Power meter calibrating system and power meter calibrating method for intelligent electric meter |
| CN102087351B (en) * | 2011-01-31 | 2014-03-26 | 浙江省电力公司 | Watt-hour meter inspection quality real-time monitoring device and method |
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| CN102998651B (en) * | 2012-12-07 | 2015-04-22 | 陈江 | Error calibration device and system and error transfer system and method of full digital electric energy meter |
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| CN104316897A (en) * | 2014-10-29 | 2015-01-28 | 上海德布森电气有限公司 | Detection device for three-phase multifunctional watt-hour meter |
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