CN102156273B - 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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- CN102156273B CN102156273B CN 201110099521 CN201110099521A CN102156273B CN 102156273 B CN102156273 B CN 102156273B CN 201110099521 CN201110099521 CN 201110099521 CN 201110099521 A CN201110099521 A CN 201110099521A CN 102156273 B CN102156273 B CN 102156273B
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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 and the even-order harmonic test method circuit recommended in the GB/T 17215.321-2008 appendix A are as shown in Figure 1, and 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 be the conversion of current return during because of fundamental error test and direct current and even-order harmonic test conversion, do not relate to the conversion of voltage circuit, also do not relate to the voltage wiring) as shown in Figure 3 so describe for the wiring of electric energy meter below this paper.With four epi-position devices is example, and the test method mode of connection of when the direct current that detects electric energy meter is tested with the even-order harmonic amount of influence, recommending in according to GB/T 17215.321-2008 appendix A is 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 the Fast Dual diode (led) module, guarantees the consistance of diode characteristic.
What all adopt when on the electric energy meter calibration circuit, doing this test 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 making an experiment now in order to solve manual wiring loaded down with trivial details, the problem of inefficiency.
For realizing above-mentioned purpose; Scheme 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; Standard scale that this loop comprises that series connection is provided with and first, second two are by the die trial piece; First is comprised first switch (K1) and at least one of series connection seat of being taken temperature by the die trial piece, second by the die trial piece comprise series connection second switch (K2) and with first by the quilt that quantity is identical in the die trial piece seat of taking temperature; Also be provided with the 3rd switch (K3) and first, second two the Y shape branch roads that the reverse diode (D1, D2) that 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 first by the series connection point of first switch (K1) in the die trial piece with the corresponding seat of being taken temperature, and second by a second switch (K2) in the die trial piece and a corresponding series connection point of being taken temperature; Also be provided with the 4th switch (K4) in the circuit; The 4th switch (K4) is parallelly connected by the die trial piece with second.
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, also go here and there respectively in the Y shape branch road branch that said two diodes belong to and 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 said seat of being taken temperature, when access was taken temperature, contact was disconnected, and will be taken temperature to be connected in the said current return.
Further, said 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
Below in conjunction with accompanying drawing the present invention is done further detailed explanation.
Circuit of the present invention is as shown in Figure 5, and 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; Standard scale that this loop comprises that series connection is provided with and first, second two are by the die trial piece; First is comprised first K switch 1 and two quilts of series connection seat of taking temperature by the die trial piece; Second by the die trial piece comprise series connection second switch K2 and with two quilts seat of taking temperature, each seat of being taken temperature comprises two current terminals that are used for a correspondence is connected on by taking temperature said loop, and; When being loaded into when not taking temperature, two current terminal short circuits of the seat of being taken temperature accordingly; In the present embodiment, this quilt is taken temperature seat with a normally closed mechanical shell fragment contact realization that resets certainly, and when access was taken temperature, contact was disconnected, and will be taken temperature to be connected in the said current return.Each is equipped with a quilt take temperature (in figure, by being taken temperature 1, taken temperature 2, taken temperature 3, taken temperature 4) by two quilts of die trial piece seat of taking temperature;
Also be provided with the 3rd K switch 3 and first, second two the Y shape branch roads that the reverse diode (D1, D2) that 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 first by the series connection point of first K switch 1 in the die trial piece with the corresponding seat of being taken temperature, and second by a second switch K2 in the die trial piece and a corresponding series connection point of being taken temperature; Also be provided with the 4th K switch 4 in the circuit; The 4th K switch 4 is parallelly connected by the die trial piece with second.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 up of fast diode.
When carrying out error test, relay control switch K1, K2 are closed, and K switch 3, K4 break off, 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 break off, then by take temperature 1 and by take temperature 2 be concatenated into diode (led) module the forward branch road; By take temperature 3 and by take temperature 4 be concatenated into diode (led) module reverse branch road, satisfy the requirement of direct current and even-order harmonic test connection.
In the present embodiment, each is included two quilts seat of taking temperature by the die trial piece and constitutes.As other embodiment, being taken temperature seat can be a plurality of.When direct current and even-order harmonic make an experiment, should guarantee that two are equated by the quilt that inserts in the die trial piece number of taking temperature, 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; Standard scale that this loop comprises that series connection is provided with first, second two first is comprised first switch (K1) and at least one seat of being taken temperature of series connection by the die trial piece by the die trial piece, second by the die trial piece comprise the second switch (K2) of series connection reach with first by the quilt that quantity is identical in the die trial piece seat of taking temperature;
Also be provided with the 3rd switch (K3) and first, second two the Y shape branch roads that the reverse diode (D1, D2) that 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 first by the series connection point of first switch (K1) in the die trial piece with the corresponding seat of being taken temperature, and second by a second switch (K2) in the die trial piece and a corresponding series connection point of being taken temperature;
Also be provided with the 4th switch (K4) in the circuit; The 4th switch (K4) is parallelly connected by the die trial piece with second.
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 said two diodes place 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 said seat of being taken temperature from resetting contact, when access is taken temperature; Contact is disconnected, and will be taken temperature to be connected in the said 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 said 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 |
Applications Claiming Priority (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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| CN102156273A CN102156273A (en) | 2011-08-17 |
| CN102156273B true CN102156273B (en) | 2012-12-26 |
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| CN 201110099521 Active 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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Families Citing this family (10)
| 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 |
| 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 |
| CN106546938A (en) * | 2015-09-16 | 2017-03-29 | 中国电力科学研究院 | A kind of anti-DC component of current transformer and test even system |
| 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 |
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN201438214U (en) * | 2009-07-22 | 2010-04-14 | 广州市格宁电气有限公司 | Multi-meter parallel testing system for testing kilowatt-hour meters |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6416978A (en) * | 1987-07-13 | 1989-01-20 | Toshiba Corp | Testing device for watthour meter |
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2011
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN201438214U (en) * | 2009-07-22 | 2010-04-14 | 广州市格宁电气有限公司 | Multi-meter parallel testing system for testing kilowatt-hour meters |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| JP昭64-16978A 1989.01.20 |
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| CN102156273A (en) | 2011-08-17 |
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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 |