CN101556321A - Auto-calibration method for split-core type current mutual inductor of three-phase electric energy meter on-site calibrator - Google Patents
Auto-calibration method for split-core type current mutual inductor of three-phase electric energy meter on-site calibrator Download PDFInfo
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- CN101556321A CN101556321A CNA2009103026996A CN200910302699A CN101556321A CN 101556321 A CN101556321 A CN 101556321A CN A2009103026996 A CNA2009103026996 A CN A2009103026996A CN 200910302699 A CN200910302699 A CN 200910302699A CN 101556321 A CN101556321 A CN 101556321A
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Abstract
The invention provides an auto-calibration method for split-core type current mutual inductor of a three-phase electric energy meter on-site calibrator, which comprises the following steps of: A. setting a signal switch and connecting the signal switch with a microprocessor, an AD converter, the signal conditioning circuit of a current mutual inductor and the signal conditioning circuit of a split-core type current mutual inductor respectively; B. providing test current for the current mutual inductor and the split-core type current mutual inductor; C. leading the microprocessor to control the signal switch for achieving the collection for the current signals of different channels, and calculating the amplitude and the phase; and D. taking the directly measured current data, namely the alternative current signal of the current mutual inductor, as the standard, and calculating the amplitude and the phase parameter which are required to be amended by the split-core type current mutual inductor. The auto-calibration method for the three-phase electric energy meter on-site calibrator split-core type current mutual inductor improves the calibration convenience of the split-core type current mutual inductor, reduces the calibration complexity for the users and manufacturers, and leads the calibration of the split-core type current mutual inductor to be capable of being implemented in the user site.
Description
Technical field
The present invention relates to a kind of calibration steps, particularly about a kind of automatic calibrating method that is used for three-phase electric energy meter on-site.
Background technology
Three-phase electric energy meter on-site calibrator adopts split core type current transformer through regular meeting, measures the current signal of electric energy meter, and the precision of split core type current transformer is low at present, poor repeatability, and stability is bad, need often calibrate.Three-phase electric energy meter on-site calibrator has direct metering system generally speaking, and three-phase electric energy meter on-site calibrator adopts split core type current transformer with regular meeting.The direct metering system of electric current adopts the high precision mutual inductor, the measuring accuracy height, and good stability can guarantee index in the long period.The precision of split core type current transformer is low at present, poor repeatability, and stability is bad, need often calibrate.Because the orientation ratio of split core type current transformer is more loaded down with trivial details, the general user is undertaken by producer, has increased the pressure of producer's after sale service.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of automatic calibrating method of split-core type current mutual inductor of three-phase electric energy meter on-site calibrator simply and easily.
The technical solution adopted for the present invention to solve the technical problems is: a kind of split-core type current mutual inductor of three-phase electric energy meter on-site calibrator automatic calibrating method is provided, it may further comprise the steps: A signalization switch, with this signaling switch respectively with microprocessor, AD converter, current transformer signal conditioning circuit and split-core type current mutual inductor signal conditioning circuit link to each other; B provides measuring current to current transformer and split-core type current mutual inductor; C microprocessor control signal switch realizes gathering the current signal of different passages, and calculating amplitude and phase place; D is with direct measured current data, and promptly the ac current signal of current transformer is a standard, calculates amplitude and phase parameter that split-core type current mutual inductor need be revised.
The scheme that the present invention solves further technical matters is: in the described steps A, the alternating current that the input of described current transformer and split-core type current mutual inductor is identical provides measuring current according to the current specification of minimum.
The scheme that the present invention solves further technical matters is: the each split-core type current mutual inductor of calibration of this calibration steps or a plurality of split-core type current mutual inductor.
The scheme that the present invention solves further technical matters is: in the described steps A, the quantity of current transformer summation current transformer signal conditioning circuit is one.
The scheme that the present invention solves further technical matters is: in the described steps A, the quantity of split-core type current mutual inductor and split-core type current mutual inductor signal conditioning circuit is at least one.
Compared to prior art, split-core type current mutual inductor of three-phase electric energy meter on-site calibrator automatic calibrating method provided by the invention is by the signalization switch, the selection of the current signal of control survey, realize the automatic calibration of split-core type current mutual inductor, improve the convenience of split-core type current mutual inductor calibration, complicacy for user and producer's minimizing calibration can be carried out the calibration of split-core type current mutual inductor at the user scene.
Description of drawings
Fig. 1 is the principle schematic of the split-core type current mutual inductor of three-phase electric energy meter on-site calibrator automatic calibrating method that provides of the invention process.
Embodiment
As shown in Figure 1, the invention provides a kind of split-core type current mutual inductor of three-phase electric energy meter on-site calibrator automatic calibrating method, it is by introducing signaling switch on original circuit, select different input signals to AD converter by microprocessor control signal switch, wherein current channel has one directly to measure passage and a plurality of split core type current transformer measurement passage.
Described split-core type current mutual inductor of three-phase electric energy meter on-site calibrator automatic calibrating method may further comprise the steps:
1. signalization switch, with this signaling switch respectively with microprocessor, AD converter, current transformer signal conditioning circuit and split-core type current mutual inductor signal conditioning circuit link to each other, the input current difference of described current transformer and split-core type current mutual inductor provides measuring current according to the current specification of minimum;
2. microprocessor control signal switch realizes gathering the current signal of different passages, and calculating amplitude and phase place;
3. with direct measured current data, promptly the ac current signal of current transformer is a standard, calculates amplitude and phase parameter that split-core type current mutual inductor need be revised.
Above calibration process can split-core type current mutual inductor of primary calibration also can a plurality of split-core type current mutual inductors of primary calibration.
Can be implemented in calibration by above split-core type current mutual inductor of three-phase electric energy meter on-site calibrator automatic calibrating method does not need standard scale just can carry out in the flow process.
Split-core type current mutual inductor of three-phase electric energy meter on-site calibrator automatic calibrating method provided by the invention is by the signalization switch, the selection of the current signal of control survey, realize the automatic calibration of split-core type current mutual inductor, improve the convenience of split-core type current mutual inductor calibration, complicacy for user and producer's minimizing calibration can be carried out the calibration of split-core type current mutual inductor at the user scene.
Claims (5)
1. split-core type current mutual inductor of three-phase electric energy meter on-site calibrator automatic calibrating method, it may further comprise the steps: A signalization switch, with this signaling switch respectively with microprocessor, AD converter, current transformer signal conditioning circuit and split-core type current mutual inductor signal conditioning circuit link to each other; B provides measuring current to current transformer signal conditioning circuit and split-core type current mutual inductor signal conditioning circuit; C microprocessor control signal switch realizes gathering the current signal of different passages, and calculating amplitude and phase place; D is with direct measured current data, and promptly the ac current signal of current transformer is a standard, calculates amplitude and phase parameter that split-core type current mutual inductor need be revised.
2. split-core type current mutual inductor of three-phase electric energy meter on-site calibrator automatic calibrating method according to claim 1, it is characterized in that: in the described steps A, the alternating current that the input of described current transformer and split-core type current mutual inductor is identical provides measuring current according to the current specification of minimum.
3. split-core type current mutual inductor of three-phase electric energy meter on-site calibrator automatic calibrating method according to claim 1 is characterized in that: the each split-core type current mutual inductor of calibration of this calibration steps or a plurality of split-core type current mutual inductor.
4. split-core type current mutual inductor of three-phase electric energy meter on-site calibrator automatic calibrating method according to claim 1 is characterized in that: in the described steps A, the quantity of current transformer signal summation current transformer modulate circuit is one.
5. split-core type current mutual inductor of three-phase electric energy meter on-site calibrator automatic calibrating method according to claim 4 is characterized in that: in the described steps A, the quantity of split-core type current mutual inductor and split-core type current mutual inductor signal conditioning circuit is at least one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009103026996A CN101556321A (en) | 2009-05-27 | 2009-05-27 | Auto-calibration method for split-core type current mutual inductor of three-phase electric energy meter on-site calibrator |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2009103026996A CN101556321A (en) | 2009-05-27 | 2009-05-27 | Auto-calibration method for split-core type current mutual inductor of three-phase electric energy meter on-site calibrator |
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| CN101556321A true CN101556321A (en) | 2009-10-14 |
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| CNA2009103026996A Pending CN101556321A (en) | 2009-05-27 | 2009-05-27 | Auto-calibration method for split-core type current mutual inductor of three-phase electric energy meter on-site calibrator |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353918A (en) * | 2011-06-22 | 2012-02-15 | 德讯科技股份有限公司 | Automatic calibration system for current-voltage analog quantity collector |
| CN103983843A (en) * | 2014-05-30 | 2014-08-13 | 杭州佳和电气股份有限公司 | Compensation algorithm for measuring active power and electric energy through forceps-shaped mutual inductor |
| CN106324479A (en) * | 2016-08-11 | 2017-01-11 | 上海东软载波微电子有限公司 | Chip calibration method and circuit, and chip |
| CN108267707A (en) * | 2017-12-13 | 2018-07-10 | 广东电网有限责任公司揭阳供电局 | Phase correction method, device and system for capacitive equipment leakage current transformer |
| CN110673080A (en) * | 2019-09-27 | 2020-01-10 | 乐清市昊达电器有限公司 | Visual intelligent controller |
| CN111025218A (en) * | 2019-12-30 | 2020-04-17 | 珠海市科荟电器有限公司 | System and method for on-line real-time self-calibration of clamp-on ammeter |
-
2009
- 2009-05-27 CN CNA2009103026996A patent/CN101556321A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353918A (en) * | 2011-06-22 | 2012-02-15 | 德讯科技股份有限公司 | Automatic calibration system for current-voltage analog quantity collector |
| CN103983843A (en) * | 2014-05-30 | 2014-08-13 | 杭州佳和电气股份有限公司 | Compensation algorithm for measuring active power and electric energy through forceps-shaped mutual inductor |
| CN103983843B (en) * | 2014-05-30 | 2016-06-01 | 杭州佳和电气股份有限公司 | Compensation algorithm when application forcipated mutual-inductor measures wattful power and electric energy |
| CN106324479A (en) * | 2016-08-11 | 2017-01-11 | 上海东软载波微电子有限公司 | Chip calibration method and circuit, and chip |
| CN108267707A (en) * | 2017-12-13 | 2018-07-10 | 广东电网有限责任公司揭阳供电局 | Phase correction method, device and system for capacitive equipment leakage current transformer |
| CN108267707B (en) * | 2017-12-13 | 2023-08-01 | 广东电网有限责任公司揭阳供电局 | Phase correction method, device and system for leakage current transformer of capacitive equipment |
| CN110673080A (en) * | 2019-09-27 | 2020-01-10 | 乐清市昊达电器有限公司 | Visual intelligent controller |
| CN111025218A (en) * | 2019-12-30 | 2020-04-17 | 珠海市科荟电器有限公司 | System and method for on-line real-time self-calibration of clamp-on ammeter |
| CN111025218B (en) * | 2019-12-30 | 2022-07-08 | 珠海市科荟电器有限公司 | System and method for online real-time self-calibration of clamp-on ammeter |
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Application publication date: 20091014 |