CN102156273A - Electric energy meter verification circuit for error test and direct current and even harmonic test - Google Patents
Electric energy meter verification circuit for error test and direct current and even harmonic test Download PDFInfo
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- CN102156273A CN102156273A CN2011100995213A CN201110099521A CN102156273A CN 102156273 A CN102156273 A CN 102156273A CN 2011100995213 A CN2011100995213 A CN 2011100995213A CN 201110099521 A CN201110099521 A CN 201110099521A CN 102156273 A CN102156273 A CN 102156273A
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Abstract
The invention relates to an electric energy meter verification circuit for an error test and a direct current and even harmonic test. The electric energy meter verification circuit is formed by improving a circuit structure based on previous error test circuits and direct current and even harmonic test circuits, and is further provided with a controllable switch so as to implement switching between two circuits. In comparison with that the previous tests performed on an electric energy meter verification device are all implemented through manual wiring, the process of manual wiring is complex and the test efficiency is not high, the electric energy meter verification circuit for the error test and the direct current and even harmonic test can implement automatic switching of wiring for an elementary error test and the direct current and even harmonic test of the electric energy meter on the electric energy meter verification device, and can effectively improve the degree of automation of the tests.
Description
Technical field
The present invention relates to the electric energy meter calibration circuit, particularly a kind of electric energy meter calibration circuit of can automatically switch error test and direct current and even-order harmonic test.
Background technology
Direct current and even-order harmonic test are the amount of the influence tests of desired electric energy meter in " specific (special) requirements of IEC62053 electric energy measurement equipment " and the national standard " GB/T 17215.321-2008 alternating current measuring equipment specific (special) requirements the 21st part: state type active electric energy meter (1 grade and 2 grades) ".
Direct current of recommending in the GB/T 17215.321-2008 appendix A and even-order harmonic test method circuit as shown in Figure 1, wave mode is as shown in Figure 2.Among Fig. 1, should equal the to be taken temperature impedance of (EUT) of the accuracy of measuring for guaranteeing, balanced impedance; Balanced impedance is the instrument with (EUT) same model of being taken temperature preferably; Commutation diode should be a same model; In order to improve equilibrium condition, can introduce resistance R B at two branch roads, its resistance should be similar to taken temperature (EUT) 10 times.
Electric energy meter calibrating apparatus is generally multi-epitope, when detecting the fundamental error of electric energy meter, the current return of electric energy meter is contacted, with four epi-position devices is example, mode of connection (only is the conversion of current return during because of fundamental error test and direct current and even-order harmonic test conversion as shown in Figure 3, do not relate to the conversion of voltage circuit, do not relate to the voltage wiring yet) so the following wiring for electric energy meter of this paper is described.With four epi-position devices is example, and the test method mode of connection of recommending in according to GB/T 17215.321-2008 appendix A when direct current that detects electric energy meter and the test of the even-order harmonic amount of influence as shown in Figure 4.4 epi-positions are divided into two, and two epi-positions are one group, and No. 1 and No. 2 epi-positions are as the forward branch road, as being taken temperature, No. 3 and No. 4 reverse branch roads of epi-positions conduct are as balanced impedance, all epi-positions are used the electric energy meter of same model during test, guarantee the impedance balance of two branch roads.Commutation diode adopts quick duodiode module, guarantees the consistance of diode characteristic.
What all adopted when doing this test on the electric energy meter calibration circuit is manual wiring in the past, and more loaded down with trivial details, test efficiency is not high.
Summary of the invention
The purpose of this invention is to provide a kind of electric energy meter calibration circuit that is used for error test and direct current and even-order harmonic test, when testing now in order to solve manual wiring loaded down with trivial details, the problem of inefficiency.
For achieving the above object, the solution of the present invention is: the electric energy meter calibration circuit that is used for the test of error test and direct current and even-order harmonic, this circuit comprises: a fundamental error test current loop, this loop comprises a standard scale and first, second two tested modules that series connection is provided with, the first tested module comprises first switch (K1) and at least one tested gauge stand of series connection, the second tested module comprise series connection second switch (K2) and with the first tested module in the identical tested gauge stand of quantity; Also be provided with the 3rd switch (K3) and first, second two the Y shape branch roads that the diode (D1, D2) that oppositely is provided with constitutes on the circuit, the 3rd switch (K3) end of this Y shape branch road is connected to the mains side of first switch (K1), two diode ends are connected respectively to the series connection point of first switch (K1) and corresponding tested gauge stand in the first tested module, and the series connection point of second switch (K2) and corresponding tested gauge stand in the second tested module; Also be provided with the 4th switch (K4) in the circuit; The 4th switch (K4) is in parallel with the second tested module.
Calibrating installation of the present invention has automatic switching function, can change the wiring of fundamental error test and direct current and even-order harmonic test automatically, has realized the robotization of process of the test, has improved work efficiency.
Further, in the Y shape branch road branch at described two diode places also respectively string be provided with the 5th switch (K5) and the 6th switch (K6).
Further, be connected with the normally closed contact that resets certainly on the described tested gauge stand, when access was taken temperature, contact was disconnected, and will be taken temperature to be connected in the described current return.
Further, described each switch is relay contact.
Description of drawings
Fig. 1 is the half-wave rectification test schematic;
Fig. 2 is half wave rectification wave figure;
Fig. 3 is fundamental error test connection figure;
Fig. 4 is direct current and even-order harmonic test connection figure;
Fig. 5 is a wiring circuit diagram of the present invention.
Embodiment
The present invention will be further described in detail below in conjunction with accompanying drawing.
Circuit of the present invention as shown in Figure 5, as can be seen from the figure, this circuit can switch the wiring of fundamental error test and direct current and even-order harmonic test, thereby has realized the robotization of process of the test.This circuit comprises: a fundamental error test current loop; This loop comprises a standard scale and first, second two tested modules that series connection is provided with, the first tested module comprises first K switch 1 and two tested gauge stands of series connection, the second tested module comprises that the second switch K2 of series connection reaches and two tested gauge stands, each tested gauge stand comprises two current terminals that are used for a correspondence is connected on by taking temperature described loop, and, when being loaded into when not taking temperature, two current terminal short circuits of corresponding tested gauge stand; In the present embodiment, this tested gauge stand is normally closed from the mechanical shell fragment contact realization that resets with one, and when access was taken temperature, contact was disconnected, and will be taken temperature to be connected in the described current return.Two tested gauge stands of each tested module are equipped with one is taken temperature (in figure, taken temperature 1, taken temperature 2, taken temperature 3, taken temperature 4);
Also be provided with the 3rd K switch 3 and first, second two the Y shape branch roads that the diode (D1, D2) that oppositely is provided with constitutes on the circuit, the 3rd K switch 3 ends of this Y shape branch road are connected to the mains side of first K switch 1, two diode ends are connected respectively to the series connection point of first K switch 1 and corresponding tested gauge stand in the first tested module, and the series connection point of second switch K2 and corresponding tested gauge stand in the second tested module; Also be provided with the 4th K switch 4 in the circuit; The 4th K switch 4 is in parallel with the second tested module.Further, go here and there respectively on the place branch road of two diodes and be provided with the 5th K switch 5 and the 6th K switch 6, control the break-make of two diode branch respectively.
Above-mentioned each switch is realized by relay.Two diodes constitute diode (led) module, and each diode is made of fast diode.
When carrying out error test, relay control switch K1, K2 closure, K switch 3, K4 disconnect, and are then taken temperature 14 to be connected in series to taking temperature, and have satisfied the line requirement that four epi-position fundamental errors are tested.
When carrying out the test of direct current and even-order harmonic, relay control switch K3, K5, K6, K4 closure, K1, K2 disconnects, then taken temperature 1 and the 2 forward branch roads that have been concatenated into diode (led) module of being taken temperature, taken temperature 3 and the 4 reverse branch roads that have been concatenated into diode (led) module of being taken temperature, satisfied the requirement of direct current and even-order harmonic test connection.
In the present embodiment, each tested module includes two tested gauge stands and constitutes.As other embodiment, tested gauge stand can be a plurality of.When direct current and even-order harmonic are tested, should guarantee that the quilt that inserts in two the tested modules number of taking temperature equates, to satisfy the test connection requirement.
Claims (4)
1. the electric energy meter calibration circuit that is used for the test of error test and direct current and even-order harmonic, it is characterized in that, this circuit comprises: a fundamental error test current loop, this loop comprises a standard scale and first, second two tested modules that series connection is provided with, the first tested module comprises first switch (K1) and at least one tested gauge stand of series connection, the second tested module comprise series connection second switch (K2) and with the first tested module in the identical tested gauge stand of quantity;
Also be provided with the 3rd switch (K3) and first, second two the Y shape branch roads that the diode (D1, D2) that oppositely is provided with constitutes on the circuit, the 3rd switch (K3) end of this Y shape branch road is connected to the mains side of first switch (K1), two diode ends are connected respectively to the series connection point of first switch (K1) and corresponding tested gauge stand in the first tested module, and the series connection point of second switch (K2) and corresponding tested gauge stand in the second tested module;
Also be provided with the 4th switch (K4) in the circuit; The 4th switch (K4) is in parallel with the second tested module.
2. the electric energy meter calibration circuit that is used for error test and direct current and even-order harmonic test according to claim 1 is characterized in that, also goes here and there respectively in the Y shape branch road branch at described two diode places and is provided with the 5th switch (K5) and the 6th switch (K6).
3. the electric energy meter calibration circuit that is used for error test and direct current and even-order harmonic test according to claim 1, it is characterized in that, be connected with normally closed on the described tested gauge stand from resetting contact, when access is taken temperature, contact is disconnected, and will be taken temperature to be connected in the described current return.
4. the electric energy meter calibration circuit that is used for error test and direct current and even-order harmonic test according to claim 1 is characterized in that described each switch is relay contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110099521 CN102156273B (en) | 2011-04-20 | 2011-04-20 | Electric energy meter verification circuit for error test and direct current and even harmonic test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110099521 CN102156273B (en) | 2011-04-20 | 2011-04-20 | Electric energy meter verification circuit for error test and direct current and even harmonic test |
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| CN102156273A true CN102156273A (en) | 2011-08-17 |
| CN102156273B CN102156273B (en) | 2012-12-26 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698735A (en) * | 2013-10-30 | 2014-04-02 | 国家电网公司 | Electric energy meter harmonic test device and method thereof |
| CN104076317A (en) * | 2013-03-28 | 2014-10-01 | 佳木斯电业局 | Power harmonic-caused electronic-type electric energy meter metering error analyzing and correcting system |
| CN104316896A (en) * | 2014-10-28 | 2015-01-28 | 国家电网公司 | Method for calibrating errors of electric energy meter under influence of direct currents and even-order harmonic |
| CN104569904A (en) * | 2014-12-19 | 2015-04-29 | 浙江万胜电力仪表有限公司 | Test device for testing direct current and even harmonic influence quantity of electric energy meter |
| CN105425199A (en) * | 2015-11-27 | 2016-03-23 | 深圳市科陆驱动技术有限公司 | Apparatus and method of direct-current even harmonic influence experiment of electric energy meter |
| CN106054110A (en) * | 2016-05-31 | 2016-10-26 | 国网河北省电力公司电力科学研究院 | Intelligent electric energy meter harmonic influence testing method |
| CN106501754A (en) * | 2016-10-19 | 2017-03-15 | 浙江恩鸿电子有限公司 | The direct current of three-phase electric energy meter and the experimental rig of even-order harmonic influence amount |
| WO2017045488A1 (en) * | 2015-09-16 | 2017-03-23 | 中国电力科学研究院 | Test system for anti-dc component and even-order harmonic of current transformer |
| CN107576927A (en) * | 2017-08-23 | 2018-01-12 | 浙江万胜智能科技股份有限公司 | A kind of direct current of electric energy meter and the experimental rig of even-order harmonic influence amount |
| CN107589395A (en) * | 2017-10-16 | 2018-01-16 | 广东东方电讯科技有限公司 | Nonlinear-load power and electric energy calibrating installation |
| CN114217259A (en) * | 2021-11-22 | 2022-03-22 | 煜邦电力智能装备(嘉兴)有限公司 | Test method for inserting direct-current even harmonic equipment into alternating-current electric energy meter calibration device |
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| CN201600446U (en) * | 2010-01-04 | 2010-10-06 | 山东电力研究院 | Device for detecting error of electric energy meter under harmonic condition by watt-second method |
| CN202141798U (en) * | 2011-04-20 | 2012-02-08 | 郑州万特电气有限公司 | Electric energy meter verification circuit for error test and DC and even harmonic test |
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| JPS6416978A (en) * | 1987-07-13 | 1989-01-20 | Toshiba Corp | Testing device for watthour meter |
| CN2401901Y (en) * | 1999-12-17 | 2000-10-18 | 河南思达电子仪器股份有限公司 | Multiple meter position device for checking electric meter |
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| CN201600446U (en) * | 2010-01-04 | 2010-10-06 | 山东电力研究院 | Device for detecting error of electric energy meter under harmonic condition by watt-second method |
| CN202141798U (en) * | 2011-04-20 | 2012-02-08 | 郑州万特电气有限公司 | Electric energy meter verification circuit for error test and DC and even harmonic test |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104076317A (en) * | 2013-03-28 | 2014-10-01 | 佳木斯电业局 | Power harmonic-caused electronic-type electric energy meter metering error analyzing and correcting system |
| CN103698735A (en) * | 2013-10-30 | 2014-04-02 | 国家电网公司 | Electric energy meter harmonic test device and method thereof |
| CN104316896A (en) * | 2014-10-28 | 2015-01-28 | 国家电网公司 | Method for calibrating errors of electric energy meter under influence of direct currents and even-order harmonic |
| CN104569904A (en) * | 2014-12-19 | 2015-04-29 | 浙江万胜电力仪表有限公司 | Test device for testing direct current and even harmonic influence quantity of electric energy meter |
| CN104569904B (en) * | 2014-12-19 | 2023-10-10 | 浙江万胜电力仪表有限公司 | DC for testing electric energy meter test device for even harmonic influence quantity |
| GB2556610A (en) * | 2015-09-16 | 2018-05-30 | China Electric Power Res Institute Company Limited | Test system for anti-DC component and even-order harmonic of current transformer |
| GB2556610B (en) * | 2015-09-16 | 2021-07-07 | China Electric Power Res Institute Company Limited | Test system for anti-DC component and even-order harmonic of current transformer |
| WO2017045488A1 (en) * | 2015-09-16 | 2017-03-23 | 中国电力科学研究院 | Test system for anti-dc component and even-order harmonic of current transformer |
| CN105425199A (en) * | 2015-11-27 | 2016-03-23 | 深圳市科陆驱动技术有限公司 | Apparatus and method of direct-current even harmonic influence experiment of electric energy meter |
| CN105425199B (en) * | 2015-11-27 | 2019-01-22 | 深圳市科陆驱动技术有限公司 | A kind of electric energy meter direct current even-order harmonic influences the device and method of experiment |
| CN106054110A (en) * | 2016-05-31 | 2016-10-26 | 国网河北省电力公司电力科学研究院 | Intelligent electric energy meter harmonic influence testing method |
| CN106501754A (en) * | 2016-10-19 | 2017-03-15 | 浙江恩鸿电子有限公司 | The direct current of three-phase electric energy meter and the experimental rig of even-order harmonic influence amount |
| CN106501754B (en) * | 2016-10-19 | 2023-05-02 | 浙江恩鸿电子有限公司 | Test device for direct current and even harmonic influence quantity of three-phase electric energy meter |
| CN107576927A (en) * | 2017-08-23 | 2018-01-12 | 浙江万胜智能科技股份有限公司 | A kind of direct current of electric energy meter and the experimental rig of even-order harmonic influence amount |
| CN107589395A (en) * | 2017-10-16 | 2018-01-16 | 广东东方电讯科技有限公司 | Nonlinear-load power and electric energy calibrating installation |
| CN114217259A (en) * | 2021-11-22 | 2022-03-22 | 煜邦电力智能装备(嘉兴)有限公司 | Test method for inserting direct-current even harmonic equipment into alternating-current electric energy meter calibration device |
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| CN102156273B (en) | 2012-12-26 |
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Owner name: ZHENGZHOU WONDER ELECTRICAL POWER CO., LTD. Free format text: FORMER NAME: ZHENGZHOU WONDER ELECTRIC CO., LTD. |
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Address after: High tech Development Zone, Henan 450001 road screen city of Zhengzhou Province, No. 15 Patentee after: Zhengzhou Wonder Electrical Power Co., Ltd. Patentee after: Electric Power Research Institute of Shanxi Electric Power Company Address before: High tech Development Zone, Henan 450001 road screen city of Zhengzhou Province, No. 15 Patentee before: ZhengZhou Wonder Electric Co., Ltd. Patentee before: Electric Power Research Institute of Shanxi Electric Power Company |