CN102393511A - Online error verification device and test method for electronic electric energy meter rapid transient pulse train - Google Patents
Online error verification device and test method for electronic electric energy meter rapid transient pulse train Download PDFInfo
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- CN102393511A CN102393511A CN2011103464521A CN201110346452A CN102393511A CN 102393511 A CN102393511 A CN 102393511A CN 2011103464521 A CN2011103464521 A CN 2011103464521A CN 201110346452 A CN201110346452 A CN 201110346452A CN 102393511 A CN102393511 A CN 102393511A
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Abstract
The present invention provides an online error verification device for an electronic electric energy meter rapid transient pulse train, and a method utilizing the device to test. Before the test, a user judges whether a connecting piece needs to be arranged between a voltage circuit and a current circuit according the wiring mode of the to-be-tested electronic electric energy meter; a rapid transient pulse train generator outputs a rapid transient pulse train signal to a coupling/decoupling network; the coupling/decoupling network sends a preset interference signal to the to-be-tested electronic electric energy meter, so as to carry out a rapid transient pulse train test on the to-be-tested electronic electric energy meter; real-time error accuracy measurement data for the to-be-tested electronic electric energy meter by an error calculator is copied; and according to the real-time error accuracy measurement data for the to-be-tested electronic electric energy meter, the user judges whether the rapid transient pulse train test for the to-be-tested electronic electric energy meter is qualified. The present invention can meet the requirements for the accuracy of a real-time testing instrument within limits of corresponding standard specifications during the test.
Description
Technical field
The present invention relates to the online error calibrating installation of electronic electric energy meter fast transient pulse train and utilize this pick-up unit to carry out the method for fast transient pulse train test.
Background technology
The test of fast transient pulse train is wherein test of electronic electric energy meter Electro Magnetic Compatibility (hereinafter to be referred as EMC); When opposing large-scale electric equipment starting of main test electric energy meter or switching, inductive load (like relay, contactor etc.) disconnection; Owing to reasons such as the insulation breakdown in switch contact gap or contact springs, produce the ability of the undesired signal that the transient state harassing and wrecking occur with the pulse train form at the cut-off point place.
According to GB/T17215.211-2006 " the general requirement of alternating current measuring equipment, test and test condition the 11st part: measuring equipment ", fast transient pulse train anti-interference test should be satisfied following test condition:
The test of fast transient pulse train should be carried out under following condition by GB/T17626.4:
---test as bench device;
---instrument is in working order;
Voltage circuit and auxiliary line pass to reference voltage;
Fundamental current Ib (corresponding rated current In) and cos Φ (corresponding sin Φ) are by the numerical value of respective standard regulation;
---the cable length between coupling mechanism and EUT :≤1m;
---trial voltage should act on common mode mode (line is over the ground):
Voltage circuit;
Current circuit, if when normal the use and voltage circuit isolate;
Auxiliary line, if when normal the use and voltage circuit isolate;
---the trial voltage on current circuit and voltage circuit: 4kV;
---surpass the trial voltage on the auxiliary line of 40V: 2kV at reference voltage;
---test period: each polarity 60s.
Error changes should be in the limit of respective standard regulation.
Annotate: accuracy can be measured with method or other suitable methods of counting.
In test, function or performance have of short duration reduction or lose and allow.Yet the accuracy of an instrument should be in the limit of respective standard regulation.
Electronic electric energy meter (hereinafter to be referred as EUT) is divided into direct access type electronic electric energy meter according to the mode of connection and through mutual inductor access type electronic electric energy meter.
In the prior art, generally take following test procedure,
1) before EUT is come into effect the fast transient pulse train; Place common electric energy meter calibrating apparatus; Output reference voltage, fundamental current Ib (corresponding rated current In) carry out first-order error with cos Φ and measure, and judge that the accuracy of EUT before test is whether in the limit that respective standard is stipulated;
2) export fundamental current through power source to EUT; To fast transient burst generator output reference voltage; The voltage circuit cable sends the undesired signal of rules regulation to EUT through coupling network; EUT accepts the test of fast transient pulse train, and observes unusual that whether the EUT function occurs recovering;
3) EUT is placed in the same electric energy meter calibrating apparatus again, carries out the error measure under the identical load, judge EUT in the accuracy after the test whether still in the limit of respective standard regulation.
According to the error measure accuracy data of EUT, judge whether the test of EUT fast transient pulse train is qualified.
Yet this test mode exists the not science of measuring method.Because inject in undesired signal and can not be carried out real-time error measure to being taken temperature when taking temperature, require with standard techniques that " in test, function or performance have of short duration reduction or lose and allow.Yet the accuracy of an instrument should be in the limit of respective standard regulation " inconsistent.
Summary of the invention
The present invention provides a kind of online error calibrating installation and method of testing of electronic electric energy meter fast transient pulse train, can satisfy in test the requirement of the accuracy of an instrument in the limit of respective standard regulation.
The online error calibrating installation of electronic electric energy meter fast transient pulse train provided by the invention comprises:
Fast transient pulse-burst signals generator is used to produce the fast transient pulse-burst signals;
The coupling decoupling network is used to the delivering path that the fast transient pulse-burst signals is provided between said fast transient burst generator and the electronic electric energy meter to be measured;
The programmable power supply device is used to export the reference voltage of electronic electric energy meter to be measured, to said electronic electric energy meter output fundamental current Ib to be measured or corresponding rated current In and cos Φ or corresponding sin Φ;
Error Calculator is used to calculate the error of electronic electric energy meter to be measured;
Photoelectric sampler is used to gather the light pulse output signal of electronic electric energy meter to be measured;
First wave filter; Be used to filter the fast transient pulse train residue signal that Error Calculator is impacted, said fast transient pulse train residue signal is the residue signal of propagating in said photoelectric sampler and electronic electric energy meter light pulse to be measured output connecting line and the air;
Said programmable power supply device comprises program-controlled voltage source, programmable current source, second wave filter, the 3rd wave filter and standard scale:
Said program-controlled voltage source is used for exporting to the fast transient pulse signal generator reference voltage of electronic electric energy meter to be measured;
Programmable current source is used for to electronic electric energy meter output fundamental current Ib to be measured or corresponding rated current In;
Second filters is used to filter from electronic electric energy meter to be measured and connects the fast transient pulse-burst signals that cable feeds back to programmable power supply device program-controlled voltage source;
The 3rd filters is used to filter the fast transient pulse-burst signals that feeds back to programmable power supply device programmable current source from electronic electric energy meter serial connection cable to be measured;
Standard scale, the electric energy error that is used to test electronic electric energy meter to be measured provides standard energy value.
The present invention also provides the method for testing of utilizing above-mentioned online error calibrating installation to carry out, comprises step:
Before test, judge whether that according to the mode of connection of electronic electric energy meter to be measured needs install brace additional between voltage circuit and current return; If electronic electric energy meter to be measured is the electronic electric energy meter to be measured that electric current and voltage circuit are isolated when normal the use, then in the voltage circuit and the adding shorting stub of current return lead-in wire terminal artificially of the corresponding phase of electronic electric energy meter to be measured;
Export the fast transient pulse-burst signals through fast transient burst generator to the coupling decoupling network; Send the predetermined interference signal through the coupling decoupling network to said electronic electric energy meter to be measured, said electronic electric energy meter to be measured is carried out the test of fast transient pulse train;
Make a copy of the Real-time Error accuracy measurement data of Error Calculator to said electronic electric energy meter to be measured; According to the Real-time Error accuracy measurement data of said electronic electric energy meter to be measured, judge whether said electronic electric energy meter fast transient pulse train test to be measured is qualified.
Further, this method of testing can also comprise step before step 2:
The programmable power supply device is exported the reference voltage of said electronic electric energy meter to be measured to the fast transient pulse producer; To said electronic electric energy meter output fundamental current Ib to be measured or corresponding rated current In and cos Φ or corresponding sin Φ; Through Error Calculator electronic electric energy meter to be measured is carried out the error measure before test, judge whether electronic electric energy meter duty to be measured is normal.
Method of testing of the present invention can directly be gathered the measuring error of EUT in the fast transient pulse train undesired signal that EUT accepts; Not only saved EUT has before and after been dismantled the time that other electric energy meter calibrating apparatus carries out error measure accepting fast transient pulse train interference test, more really realized requiring corresponding to measuring method with standard technique.Because online error calibrating installation of the present invention has added wave filter in the centre that programmable power supply, error measuring device are connected with coupling mechanism; Excluded the influence of undesired signal to greatest extent to programmable power supply and error testing standard; More effectively protected program control source and error measure standard, programmable power supply and error measuring device have been had the excellent protection measure.
Description of drawings
Fig. 1 is the circuit theory diagrams of the calibrating installation of embodiment 1;
Fig. 2 is the process flow diagram of the method for testing of embodiment 1.
Embodiment
In order to solve under the situation of real load; Current value and power factor are difficult to satisfy standard-required; Can only carry out the error measure of finite value to active electric energy meter, can't simulate reactive energy output signal, thereby measure the problem of reactive energy Watch Error; The invention provides a kind of online error calibrating installation of electronic electric energy meter fast transient pulse train, propose the method that a kind of fast transient pulse train that utilizes this online error calibrating installation to carry out effective and feasible electronic electric energy meter is tested simultaneously.This online error calibrating installation increases standard scale in the programmable power supply device, for the error of measuring EUT provides standard electric energy correlative value; Improve the antijamming capability of programmable power supply device; Carry out Filtering Processing at current output terminal; Voltage output end carries out Filtering Processing, and the input of photoelectric sampler increases filter function, has realized under the situation of real load EUT applied in the fast transient pulse-burst signals process and has carried out error measure.
Fig. 1 is the calibrating installation of the fast transient pulse train of electronic electric energy meter of the present invention; Comprise: programmable power supply device, fast transient pulse-burst signals generator, coupling decoupling network; Error Calculator, photoelectric sampler and first wave filter, programmable power supply device specifically comprise program-controlled voltage source, second wave filter that is connected with program-controlled voltage source; Programmable current source, the 3rd wave filter and the standard scale that are connected with programmable current source.Standard scale is connected with the input end of second wave filter, the 3rd wave filter and the input end of Error Calculator respectively; Principle of work is described below:
Before test; The programmable power supply device exports the reference voltage value (the concrete numerical value of reference voltage is decided according to the specification of electronic electric energy meter to be measured) of EUT to be measured, to EUT output fundamental current Ib (or corresponding rated current In) and cos Φ (or sin Φ) accordingly, the concrete numerical value of fundamental current is decided according to the specification of electronic electric energy meter to be measured.Through Error Calculator EUT to be measured is carried out the error measure before test; The programmable power supply device is to EUT output fundamental current to be measured; To fast transient burst generator output reference voltage; Voltage signal is through the end of incoming cables cable link of fast transient burst generator with the coupling decoupling network; Be transported to the coupling decoupling network, again through the leading-out terminal of coupling decoupling network and the voltage circuit stube cable of said electronic electric energy meter to be measured.Send the predetermined interference signal to said electronic electric energy meter to be measured and carry out the test of fast transient pulse train;
When EUT to be measured accepts fast transient pulse train undesired signal, propagate the fast transient pulse train residue signal that Error Calculator is impacted in the first filters photoelectric sampler and electronic electric energy meter light pulse to be measured output connecting line and the air; The 3rd filters be connected in series the fast transient pulse-burst signals that cable feeds back to the programmable current source of programmable power supply device from electronic electric energy meter to be measured; Second filters with from electronic electric energy meter to be measured and connect the fast transient pulse-burst signals that cable feeds back to the program-controlled voltage source of programmable power supply device.Photoelectric sampler is exported signal through the photoimpact that data line receives electronic electric energy meter to be measured, is transferred to Error Calculator to signal through data line again, and said electronic electric energy meter to be measured is carried out real-time error measure.
Below be the method for utilizing the online error calibrating installation of the electronic electric energy meter fast transient pulse train that the invention described above provides to carry out the test of fast transient pulse train:
Step 1: before test, judge whether that according to the mode of connection of electronic electric energy meter to be measured needs install brace additional between voltage circuit and current return; If electronic electric energy meter to be measured is the electronic electric energy meter to be measured that electric current and voltage circuit are isolated when normal the use, then in the voltage circuit and the adding shorting stub of current return lead-in wire terminal artificially of the corresponding phase of electronic electric energy meter to be measured; Like this wiring make an experiment than standard-required only current circuit to be applied the fast transient pulse-burst signals more harsh, also satisfy the requirement of standard.
Step 2: export the fast transient pulse-burst signals to the coupling decoupling network through fast transient burst generator; Send the predetermined interference signal through the coupling decoupling network to said electronic electric energy meter to be measured, said electronic electric energy meter to be measured is carried out the test of fast transient pulse train;
Step 3: make a copy of the Real-time Error accuracy measurement data of Error Calculator to said electronic electric energy meter to be measured;
Step 4:, judge whether said electronic electric energy meter fast transient pulse train test to be measured is qualified according to the Real-time Error accuracy measurement data of said electronic electric energy meter to be measured.
In addition; As a preferred embodiment; Before carrying out above-mentioned steps 2, the programmable power supply device is exported the reference voltage of said electronic electric energy meter to be measured to the fast transient pulse producer, to said electronic electric energy meter output fundamental current Ib to be measured or corresponding rated current In and cos Φ or corresponding sin Φ; Through Error Calculator electronic electric energy meter to be measured is carried out the error measure before test, judge whether electronic electric energy meter duty to be measured is normal.
Method of testing of the present invention can directly be gathered the measuring error of EUT when EUT accepts fast transient pulse train undesired signal; Not only saved EUT has before and after been dismantled the time that other electric energy meter calibrating apparatus carries out error measure accepting fast transient pulse train interference test, more really realized requiring corresponding to measuring method with standard technique; The method has the excellent protection measure to programmable power supply and error measuring device; The centre that is connected with coupling mechanism at programmable power supply, error measuring device has added wave filter; Excluded the influence of undesired signal to greatest extent, more effectively protected program control source and error measure standard programmable power supply and error testing standard.
The foregoing description is a preferred implementation of the present invention; But embodiment of the present invention is not restricted to the described embodiments; Other are any not to deviate from modification, the modification done under spirit of the present invention and the principle, substitute, combination, simplify; All should be the substitute mode of equivalence, all should be included within protection scope of the present invention.
Claims (3)
1. the online error calibrating installation of an electronic electric energy meter fast transient pulse train is characterized in that, comprising:
Fast transient pulse-burst signals generator is used to produce the fast transient pulse-burst signals;
The coupling decoupling network is used to the delivering path that the fast transient pulse-burst signals is provided between said fast transient burst generator and the electronic electric energy meter to be measured;
The programmable power supply device is used to export the reference voltage of electronic electric energy meter to be measured, to said electronic electric energy meter output fundamental current Ib to be measured or corresponding rated current In and cos Φ or corresponding sin Φ;
Error Calculator is used to calculate the error of electronic electric energy meter to be measured;
Photoelectric sampler is used to gather the light pulse output signal of electronic electric energy meter to be measured;
First wave filter; Be used to filter the fast transient pulse train residue signal that Error Calculator is impacted, said fast transient pulse train residue signal is the residue signal of propagating in said photoelectric sampler and electronic electric energy meter light pulse to be measured output connecting line and the air;
Said programmable power supply device comprises program-controlled voltage source, programmable current source, second wave filter, the 3rd wave filter and standard scale:
Said program-controlled voltage source is used for exporting to the fast transient pulse signal generator reference voltage of electronic electric energy meter to be measured;
Programmable current source is used for to electronic electric energy meter output fundamental current Ib to be measured or corresponding rated current In;
Second filters is used for from electronic electric energy meter to be measured and connects the fast transient pulse-burst signals that cable feeds back to programmable power supply device program-controlled voltage source;
The 3rd filters is used for being connected in series the fast transient pulse-burst signals that cable feeds back to programmable power supply device programmable current source from electronic electric energy meter to be measured;
Standard scale, the electric energy error that is used to test electronic electric energy meter to be measured provides standard energy value.
2. the method for testing of utilizing the described online error calibrating installation of claim 1 to carry out is characterized in that, comprises step:
1) before test, judges whether that according to the mode of connection of electronic electric energy meter to be measured needs install brace additional between voltage circuit and current return; If electronic electric energy meter to be measured is the electronic electric energy meter to be measured that electric current and voltage circuit are isolated when normal the use, then in the voltage circuit and the adding shorting stub of current return lead-in wire terminal artificially of the corresponding phase of electronic electric energy meter to be measured;
2) export the fast transient pulse-burst signals through fast transient burst generator to the coupling decoupling network; Send the predetermined interference signal through the coupling decoupling network to said electronic electric energy meter to be measured, said electronic electric energy meter to be measured is carried out the test of fast transient pulse train;
3) make a copy of the Real-time Error accuracy measurement data of Error Calculator to said electronic electric energy meter to be measured;
4), judge whether said electronic electric energy meter fast transient pulse train test to be measured is qualified according to the Real-time Error accuracy measurement data of said electronic electric energy meter to be measured.
3. method of testing according to claim 2 is characterized in that, also comprises step before the said step 2:
The programmable power supply device is exported the reference voltage of said electronic electric energy meter to be measured to the fast transient pulse producer; To said electronic electric energy meter output fundamental current Ib to be measured or corresponding rated current In and cos Φ or corresponding sin Φ; Through Error Calculator electronic electric energy meter to be measured is carried out the error measure before test, judge whether electronic electric energy meter duty to be measured is normal.
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| CN105093162A (en) * | 2015-08-07 | 2015-11-25 | 国家电网公司 | Method and device for calibrating measurement error of electric energy meter under pulse train interference condition |
| CN105911513A (en) * | 2016-06-20 | 2016-08-31 | 国网江西省电力科学研究院 | System for testing immunity of intelligent ammeter to radio frequency conducted disturbance |
| CN106154212A (en) * | 2016-08-31 | 2016-11-23 | 宜兴市森维电子有限公司 | A kind of EFT/B immunity experiment system under the conditions of electric energy meter bringing onto load |
| CN106772210A (en) * | 2017-02-22 | 2017-05-31 | 国网上海市电力公司 | A kind of electronic electric energy meter electrical fast transient (eft) immunity test system |
| CN107907851A (en) * | 2017-11-14 | 2018-04-13 | 国网山东省电力公司电力科学研究院 | A kind of ancillary test device and method of electric energy meter EMC test |
| CN111289822A (en) * | 2020-02-28 | 2020-06-16 | 杭州电子科技大学 | Industrial robot demonstrator testing method based on electric fast transient pulse group |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106154212B (en) * | 2016-08-31 | 2019-04-30 | 宜兴市森维电子有限公司 | A kind of EFT/B immunity experiment system under the conditions of electric energy meter bringing onto load |
| CN106772210A (en) * | 2017-02-22 | 2017-05-31 | 国网上海市电力公司 | A kind of electronic electric energy meter electrical fast transient (eft) immunity test system |
| CN107907851A (en) * | 2017-11-14 | 2018-04-13 | 国网山东省电力公司电力科学研究院 | A kind of ancillary test device and method of electric energy meter EMC test |
| CN111289822A (en) * | 2020-02-28 | 2020-06-16 | 杭州电子科技大学 | Industrial robot demonstrator testing method based on electric fast transient pulse group |
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