CN204694836U - A kind of electric energy meter power frequency magnetic field influence amount test unit - Google Patents
A kind of electric energy meter power frequency magnetic field influence amount test unit Download PDFInfo
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- CN204694836U CN204694836U CN201520424727.2U CN201520424727U CN204694836U CN 204694836 U CN204694836 U CN 204694836U CN 201520424727 U CN201520424727 U CN 201520424727U CN 204694836 U CN204694836 U CN 204694836U
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- pressure regulator
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Abstract
A kind of electric energy meter power frequency magnetic field influence amount test unit, comprising: pressure regulator, wave filter, current transformer, inductive coil, tester, detecting unit, controller and main frame.Pressure regulator input connects distribution 220V AC power, and the output of pressure regulator is connected with the primary side of current transformer through wave filter; The secondary side joint inductive coil of current transformer; Detecting unit is connected with inductive coil, and detecting unit exports and is connected with the input end of controller, and the output terminal of controller and the output of pressure regulator connect; Main frame is connected by communication interface with controller, realizes man-machine interaction, and main frame can arrange magnetic induction density, and shows the electric current of inductive coil reality and the magnetic induction density in middle position magnetic field, carries out Real-Time Monitoring to test condition; The input end of pressure regulator is connected with tester, and output and the tested ammeter of checker connect, and reads the fundamental error of ammeter.The utility model can realize the automatic detection of electric energy meter power frequency magnetic field influence amount test and the real-time detection of power frequency magnetic field magnetic induction density.
Description
Technical field
The utility model relates to a kind of electric energy meter power frequency magnetic field influence amount test unit, belongs to electric energy meter detection technique field.
Background technology
Power frequency magnetic field major part is produced by the power current in conductor, and a small amount of waits other devices also can produce as stray transformer flux is logical.In actual applications, electric power system (generating, electric power transfer, converting equipment etc.) is the main source of frequency electromagnetic radiation.Large consumer, as heavy-duty motor, motor trailer system etc., also can produce power frequency magnetic field radiation, meanwhile, in use also can produce a certain amount of low frequency electromagnetic radiation as the product such as household electrical appliance, electric tool in normal work.
The intelligent electric meter of part manufacturer production being found when carrying out the test of power frequency magnetic field influence amount, there will be when it is in position the most responsive under power frequency magnetic field environment the phenomenon that error knots modification does not meet standard-required.If in the site environment having power frequency magnetic field to disturb near these ammeters are installed to, that electric energy meter must be caused to measure is inaccurate, and then causes metering dispute, affects the corporate image of State Grid Corporation of China.
There is no special electric energy meter power frequency influence amount test unit at present, need manually to carry out test macro and build.Main employing power frequency magnetic field generator produces the power frequency magnetic field that magnetic induction density is 0.5mT in the rectangle or circular inductive coil of standard, then ammeter is received electric energy meter checking device, and put into inductive coil and carry out error-detecting, obtain the electric energy meter error knots modification that power frequency magnetic field causes.During this kind of method test, owing to not detecting the magnetic induction density of the power frequency magnetic field produced.When magnetic field generator breaks down, if the magnetic induction density in magnetic field does not meet 0.5mT in coil surface or central vertical plane, also cannot Timeliness coverage even if do not meet standard-required testing crew.
Summary of the invention
The purpose of this utility model is, in order to overcome the deficiencies in the prior art, provides a kind of electric energy meter power frequency magnetic field influence amount test unit, for the magnetic induction density of Real-Time Monitoring power frequency magnetic field, automatically detects the ability of the anti-power frequency magnetic field interference of electric energy meter.
Realizing the technical solution of the utility model is: a kind of electric energy meter power frequency magnetic field of the utility model influence amount test unit, described device is made up of pressure regulator, wave filter, current transformer, inductive coil, tester, detecting unit, controller and main frame.
Pressure regulator input termination distribution 220V AC power, the output terminal of pressure regulator is connected with the primary side of current transformer through wave filter; The secondary side joint inductive coil of current transformer; Detecting unit is connected with inductive coil; Detecting unit exports and is connected with the input end of controller; The output terminal of controller is connected with the output of pressure regulator, controller and host interconnection; The power end of tester connects pressure regulator input end, and the output of tester connects electric energy meter.
Principle of work of the present utility model is, the input of the utility model device pressure regulator connects distribution 220V AC power, and the output of pressure regulator is connected with the primary side of current transformer through wave filter; The secondary side joint inductive coil of current transformer; Detecting unit is connected with inductive coil, detects in inductive coil the magnetic induction density of electric current and the inductive coil middle position passed through, and detecting unit exports and is connected with the input end of controller, by the information transmission that detects to controller.The output terminal of controller and the output of pressure regulator connect, and according to the electric current of the coil factor of inductive coil, coil turn and coil, controller calculates the magnetic induction density that inductive coil induces.Comparing with the magnetic induction density value of setting, by controlling the output voltage of pressure regulator, realizing the control to inductive coil electric current, finally reach the object of the magnetic induction density regulating inductive coil central authorities, until meet the regulation of standard.
Main frame is connected by communication interface with controller, realizes man-machine interaction, and main frame can arrange magnetic induction density, and shows the electric current of inductive coil reality and the magnetic induction density in middle position magnetic field, is convenient to carry out Real-Time Monitoring to test condition.The input end of pressure regulator is connected with tester, and for tester provides working power, output and the tested ammeter of checker connect, and detect the ammeter being in inductive coil middle position, reads the fundamental error of ammeter.By the error knots modification of electric energy meter under power frequency magnetic field environment and not under power frequency magnetic field environment, judge the ability of the anti-power frequency magnetic field interference of electric energy meter.
The utility model beneficial effect is compared with the prior art: the present invention, by detecting the magnetic induction density in inductive coil electric current and middle position magnetic field thereof in real time, controls the output of pressure regulator, regulates the magnetic induction density of test power frequency magnetic field to meet the requirement of standard.And by tester, the error of electric energy meter under power frequency magnetic field impact is verified, read the error knots modification that power frequency magnetic field brings further.Achieve the automatic detection of electric energy meter power frequency magnetic field influence amount test and the real-time detection of power frequency magnetic field magnetic induction density.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of the utility model device.
Embodiment
Below in conjunction with embodiment contrast accompanying drawing, the present invention is described in detail.
Fig. 1 is the structural representation of device of the present invention.
A kind of electric energy meter power frequency magnetic field of the present embodiment influence amount test unit comprises: pressure regulator, wave filter, current transformer, inductive coil, tester, detecting unit, controller and main frame.
The input of pressure regulator connects the 220V alternating current of power distribution network, and the control of the size of its output voltage is by regulating the number of turn of its output terminal winding to realize.For ensureing that the current waveform that pressure regulator exports be sine, and resultant distortion rate is less than 8%, connects the primary side of current transformer at the output terminal of pressure regulator through wave filter.The secondary side joint inductive coil of current transformer, the small area analysis exported by pressure regulator, high voltage convert alternating current are the alternating current of big current, low-voltage, and then provide exciting current to coil, produce the power frequency magnetic field that magnetic induction density meets standard-required.In the present embodiment, for meeting the requirement of GB/T17626.8-2006 " EMC test and measuring technique power frequency magnetic field noise immunity test " and GB/T 17215.321-2008 " alternating current measurement equipment particular/special requirement the 21st part: state type exchanges active electric energy meter (1 grade and 2 grades) ", the magnetic induction density of the power frequency magnetic field of main frame setting is 0.5mT.Detecting unit detects the magnetic induction density H ＇ of the electric current I of inductive coil and the reality in inductive coil middle position magnetic field, will record information transmission to controller.Controller, according to the coil factor N of the information obtained and coil and number of turn n, calculates the magnetic induction density theoretical value H (H=n in now coil middle position magnetic field
n
i), compared by the 0.5mT of this value and initial setting, as H and 0.5mT exists deviation, then controller regulates the output of pressure regulator and then regulates the output current of current transformer, reach the effect changing inductive coil electric current, until the 0.5mT of H and setting is basically identical.The main frame be connected with controller, now shows the electric current I of inductive coil, the actual magnetic induction density H ＇ recording inductive coil middle position magnetic field and the magnetic induction density theoretical value H calculated.
When the magnetic induction density H in coil middle position magnetic field equals 0.5mT, tester detects the fundamental error putting into the tested electric energy meter of inductive coil middle position, and with when not applying power frequency magnetic field, the fundamental error of tested ammeter contrasts, and obtains this variable of ammeter error that power frequency magnetic field causes.Due to electric energy meter normally work time, under outside magnetic field impact, allow electric energy meter error in dipping knots modification should more than 2.0%(1 level table) and 3.0%(2 level table).If error knots modification does not meet the demands, then illustrate that the anti-power frequency magnetic field interference performance of ammeter does not meet the demands.
It should be noted that in the present invention, the theoretical value H that the magnetic induction density H ＇ in the actual inductive coil middle position magnetic field detected and controller calculate should basically identical (considering the measuring error of detecting unit itself).Reviewer according to the value of main frame display, can judge the reliability of test, avoids the conclusion (of pressure testing) obtaining mistake.
The undeclared part related in the utility model is same as the prior art or adopt prior art to be realized.
Claims (2)
1. an electric energy meter power frequency magnetic field influence amount test unit, is characterized in that, described device is made up of pressure regulator, wave filter, current transformer, inductive coil, tester, detecting unit, controller and main frame; Pressure regulator input termination distribution 220V AC power, the output terminal of pressure regulator is connected with the primary side of current transformer through wave filter; The secondary side joint inductive coil of current transformer; Detecting unit is connected with inductive coil; Detecting unit exports and is connected with the input end of controller; The output terminal of controller is connected with the output of pressure regulator, controller and host interconnection; The power end of tester connects pressure regulator input end, and the output of tester connects electric energy meter.
2. a kind of electric energy meter power frequency magnetic field influence amount test unit according to claim 1, it is characterized in that, described main frame is connected by communication interface with controller, realize man-machine interaction, main frame can arrange magnetic induction density, and shows the electric current of inductive coil reality and the magnetic induction density in middle position magnetic field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520424727.2U CN204694836U (en) | 2015-06-18 | 2015-06-18 | A kind of electric energy meter power frequency magnetic field influence amount test unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520424727.2U CN204694836U (en) | 2015-06-18 | 2015-06-18 | A kind of electric energy meter power frequency magnetic field influence amount test unit |
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| CN204694836U true CN204694836U (en) | 2015-10-07 |
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| CN201520424727.2U Expired - Fee Related CN204694836U (en) | 2015-06-18 | 2015-06-18 | A kind of electric energy meter power frequency magnetic field influence amount test unit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597356A (en) * | 2016-12-03 | 2017-04-26 | 国网江西省电力公司电力科学研究院 | Single-phase electric energy meter power frequency magnetic field influence quantity testing apparatus |
| CN109212291A (en) * | 2018-08-14 | 2019-01-15 | 宁波三星智能电气有限公司 | A kind of electric energy meter automatic compensating method |
| CN109374936A (en) * | 2018-09-28 | 2019-02-22 | 深圳市霍达尔仪器有限公司 | A kind of Current feedback power frequency magnetic field generator |
| CN109655693A (en) * | 2018-12-29 | 2019-04-19 | 广东省医疗器械质量监督检验所 | A kind of device and test method for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field |
| CN113138362A (en) * | 2021-05-11 | 2021-07-20 | 深圳市先行电气技术有限公司 | Calibration method for automatically compensating electric energy metering error of electric energy meter |
-
2015
- 2015-06-18 CN CN201520424727.2U patent/CN204694836U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597356A (en) * | 2016-12-03 | 2017-04-26 | 国网江西省电力公司电力科学研究院 | Single-phase electric energy meter power frequency magnetic field influence quantity testing apparatus |
| CN109212291A (en) * | 2018-08-14 | 2019-01-15 | 宁波三星智能电气有限公司 | A kind of electric energy meter automatic compensating method |
| CN109374936A (en) * | 2018-09-28 | 2019-02-22 | 深圳市霍达尔仪器有限公司 | A kind of Current feedback power frequency magnetic field generator |
| CN109655693A (en) * | 2018-12-29 | 2019-04-19 | 广东省医疗器械质量监督检验所 | A kind of device and test method for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field |
| CN109655693B (en) * | 2018-12-29 | 2023-12-12 | 广东省医疗器械质量监督检验所 | Device and method for electromagnetic compatibility power frequency doubling magnetic field test |
| CN113138362A (en) * | 2021-05-11 | 2021-07-20 | 深圳市先行电气技术有限公司 | Calibration method for automatically compensating electric energy metering error of electric energy meter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20151007 Termination date: 20160618 |