CN104062621A - Isolation voltage mutual inductor error checking method and checking system - Google Patents
Isolation voltage mutual inductor error checking method and checking system Download PDFInfo
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- CN104062621A CN104062621A CN201410259299.2A CN201410259299A CN104062621A CN 104062621 A CN104062621 A CN 104062621A CN 201410259299 A CN201410259299 A CN 201410259299A CN 104062621 A CN104062621 A CN 104062621A
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Abstract
The invention relates to the technical field of mutual inductor checking, in particular to an isolation voltage mutual inductor error checking method and a checking system in an electric energy meter checking device. The method includes the steps that one meter position of an isolation voltage mutual inductor to be checked serves as a fixed meter position, other meter positions serve as comparison meter positions, the same real load is applied to the comparison meter positions and the fixed meter position sequentially, meanwhile the comparison meter positions and the fixed meter position are connected with two sets of input ends of a mutual inductor checking device, and voltage of the fixed meter position is compared with voltage of the comparison meter positions to obtain proportional errors and phase errors between the comparison meter positions and the fixed meter position of the isolation voltage mutual inductor. According to the checking method and the checking system, error detection can be achieved without the need of a standard voltage mutual inductor, and accordingly influences of errors of the standard voltage mutual inductor on test results are fundamentally eliminated. The checking system is wide in work voltage range, good in error linearity and high in measurement precision, and meanwhile on-site or laboratory tests are very convenient to achieve by means of a portable structure.
Description
Technical field
The present invention relates to transducer check technical field, relate in particular to isolated voltage transformer error checking method and check system in a kind of electric energy meter calibrating apparatus.
Background technology
For the isolated voltage transformer using in electrical energy meter calibration system, its mistake extent directly has influence on the measuring accuracy of whole meter correcting system, so carry out the error testing of the isolated voltage transformer in this system, seems particularly important.
At present also do not have special testing apparatus to detect the error of isolated voltage transformer at home and abroad, still by common voltage transformer checking system, test, utilize the principle of standard mutual inductor comparison error of measurement to measure, this method of testing must be equipped with high-precision standard potential transformer, tester operating voltage is low because being subject to for this situation, the configuration of few, the whole measuring system of the power factor of voltage load box is loaded down with trivial details, structure too redundancy on-the-spot test is very restricted.
Summary of the invention
For the problems referred to above, the present invention provides a kind of isolated voltage transformer error checking method according to the isolated voltage transformer primary side feature identical with secondary side voltage, and has designed corresponding check system with reference to the method.
A kind of isolated voltage transformer error checking method, concrete steps are: using an epi-position of isolated voltage transformer to be verified as fixing epi-position, all the other epi-positions are epi-position as a comparison, relatively epi-position accesses identical actual loading with fixing epi-position successively, access two groups of input ends of mutual-inductor tester simultaneously, the voltage of fixing epi-position is compared with the voltage of epi-position relatively, draw isolated voltage transformer each relatively proportional error and phase error of epi-position and fixed table interdigit.
At isolated voltage transformer to be verified fixedly epi-position and epi-position shunt load respectively relatively, by regulating load size, regulate different operating voltage and the load of different capabilities.
Because isolated voltage transformer has fixedly epi-position and the identical feature of the corresponding winding voltage of comparison epi-position from structure, therefore consider directly by the fixedly epi-position of isolated voltage transformer, to examine and determine comparison epi-position, concrete calibrating completes by digital mutual inductor tester.Using an epi-position of isolated voltage transformer as fixing epi-position, other epi-positions are epi-position as a comparison, the tester input end access fixedly voltage signal of epi-position and a certain comparison epi-position compares, and exports this comparison epi-position and fixedly proportional error and the phase error of epi-position.Then fixed table invariant position, moves to another road of voltage load box successively other comparison epi-positions and measures, and obtains proportional error and phase error between each epi-position.During calibrating, need to measure the error under different voltage conditions and loading condition, this can be realized by access voltage load box.
The corresponding check system of said method comprises digital mutual inductor tester and voltage load box, voltage load box has two-way independence load output, after the fixedly epi-position of isolated voltage transformer to be verified and voltage load box Yi road output-parallel, connect electric energy meter calibrating apparatus voltage output end, connect digital mutual inductor tester standard value input end, what it relatively connect digital mutual inductor tester after another road output-parallel of epi-position and voltage load box treats measured value input end simultaneously.Digital mutual inductor tester voltage range is 44V-440V, and different voltage conditions can be provided, and the input end of digital mutual inductor tester accesses respectively epi-position to be compared, the proportional error of exportable two epi-positions and phase error.In this system, adopt voltage load box fictitious load, specifically adopt FY-T type, there is two-way independence load output function.For the load of every road, all provide the load of many power factors to select (COS Φ=1.0(is resistive), 0.25(perception), 0.5(perception), 0.8(capacitive)), to be suitable for the test needs of multiple occasion.
The method of the invention and system need not can complete error-detecting by standard potential transformer, thereby have fundamentally removed the impact on test result being brought by the error of standard potential transformer self.The operating voltage range wide (linear measurement voltage range is 44-440V) of this test macro, the error linearity is good, measuring accuracy is high, adopt portable construction simultaneously and make scene or laboratory test become very convenient, this cover system has made up the blank of domestic the sector.There are good market outlook simultaneously.
Accompanying drawing explanation
Fig. 1 is test principle figure of the present invention;
In figure, 1, digital mutual inductor tester, 2, load one, 3, isolated voltage transformer to be tested, 4, load two, 5, electric energy meter calibrating apparatus voltage output end.
Embodiment
A kind of isolated voltage transformer error checking system, as shown in the figure, comprise HES-1B type digital mutual inductor tester and FY-T type voltage load box, voltage load box has two-way independence load output, after load one output terminal of the fixedly epi-position of isolated voltage transformer to be verified and voltage load box is in parallel, connect electric energy meter calibrating apparatus voltage output end, connect digital mutual inductor tester standard value input end A end, X end, its treat measured value input end a end, x that relatively load two output terminals of epi-position and voltage load box connect digital mutual inductor tester after in parallel holds simultaneously.
Using an epi-position of isolated voltage transformer as fixing epi-position, other epi-positions are epi-position as a comparison, the tester input end access fixedly voltage signal of epi-position and a certain comparison epi-position compares, and exports this comparison epi-position and fixedly proportional error and the phase error of epi-position.Then fixed table invariant position, moves to another road of voltage load box successively other comparison epi-positions and measures, and obtains proportional error and phase error between each epi-position.
Claims (3)
1. an isolated voltage transformer error checking method, it is characterized in that: using an epi-position of isolated voltage transformer to be verified as fixing epi-position, all the other epi-positions are epi-position as a comparison, relatively epi-position accesses identical actual loading with fixing epi-position successively, access two groups of input ends of mutual-inductor tester simultaneously, the voltage of fixing epi-position is compared with the voltage of epi-position relatively, draw isolated voltage transformer each relatively proportional error and phase error of epi-position and fixed table interdigit.
2. isolated voltage transformer error checking method according to claim 1, it is characterized in that: at isolated voltage transformer to be verified fixedly epi-position and epi-position shunt load respectively relatively, by regulating load size, regulate different operating voltage and the load of different capabilities.
3. an isolated voltage transformer error checking system, it is characterized in that: comprise digital mutual inductor tester and voltage load box, voltage load box has two-way independence load output, after the fixedly epi-position of isolated voltage transformer to be verified and voltage load box Yi road output-parallel, connect electric energy meter calibrating apparatus voltage output end, connect digital mutual inductor tester standard value input end, what it relatively connect digital mutual inductor tester after another road output-parallel of epi-position and voltage load box treats measured value input end simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410259299.2A CN104062621A (en) | 2014-06-12 | 2014-06-12 | Isolation voltage mutual inductor error checking method and checking system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410259299.2A CN104062621A (en) | 2014-06-12 | 2014-06-12 | Isolation voltage mutual inductor error checking method and checking system |
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| CN104062621A true CN104062621A (en) | 2014-09-24 |
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| CN201410259299.2A Pending CN104062621A (en) | 2014-06-12 | 2014-06-12 | Isolation voltage mutual inductor error checking method and checking system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108267707A (en) * | 2017-12-13 | 2018-07-10 | 广东电网有限责任公司揭阳供电局 | A kind of method for correcting phase, the apparatus and system of capacitive apparatus leakage current mutual inductor |
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| US2481198A (en) * | 1947-01-29 | 1949-09-06 | Richard A Caldwell | Transformer calibrating apparatus |
| CN1172261A (en) * | 1997-08-27 | 1998-02-04 | 武汉国测电器公司 | Method and device for checking electric power mutual inductor |
| CN101592716A (en) * | 2009-06-30 | 2009-12-02 | 深圳市科陆电子科技股份有限公司 | Voltage transformer (VT) method of testing and system thereof |
| CN101726715A (en) * | 2009-11-13 | 2010-06-09 | 国网电力科学研究院武汉南瑞有限责任公司 | Online calibration method for error characteristics of voltage transformer for power system |
| CN103018704A (en) * | 2012-11-30 | 2013-04-03 | 广州市格宁电气有限公司 | Correction method for instrument voltage transformer |
| CN203101622U (en) * | 2013-01-25 | 2013-07-31 | 河北省电力公司电力科学研究院 | Testing system for 220 V output voltage multi-output voltage mutual inductor |
| CN203894402U (en) * | 2014-06-12 | 2014-10-22 | 山东省计量科学研究院 | Isolation voltage transformer error verification system |
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2014
- 2014-06-12 CN CN201410259299.2A patent/CN104062621A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2481198A (en) * | 1947-01-29 | 1949-09-06 | Richard A Caldwell | Transformer calibrating apparatus |
| CN1172261A (en) * | 1997-08-27 | 1998-02-04 | 武汉国测电器公司 | Method and device for checking electric power mutual inductor |
| CN101592716A (en) * | 2009-06-30 | 2009-12-02 | 深圳市科陆电子科技股份有限公司 | Voltage transformer (VT) method of testing and system thereof |
| CN101726715A (en) * | 2009-11-13 | 2010-06-09 | 国网电力科学研究院武汉南瑞有限责任公司 | Online calibration method for error characteristics of voltage transformer for power system |
| CN103018704A (en) * | 2012-11-30 | 2013-04-03 | 广州市格宁电气有限公司 | Correction method for instrument voltage transformer |
| CN203101622U (en) * | 2013-01-25 | 2013-07-31 | 河北省电力公司电力科学研究院 | Testing system for 220 V output voltage multi-output voltage mutual inductor |
| CN203894402U (en) * | 2014-06-12 | 2014-10-22 | 山东省计量科学研究院 | Isolation voltage transformer error verification system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108267707A (en) * | 2017-12-13 | 2018-07-10 | 广东电网有限责任公司揭阳供电局 | A kind of method for correcting phase, the apparatus and system of capacitive apparatus leakage current mutual inductor |
| 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 |
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Application publication date: 20140924 |
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