CN104330677A - Device and method for testing electronic type current transformer - Google Patents
Device and method for testing electronic type current transformer Download PDFInfo
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- CN104330677A CN104330677A CN201410658751.2A CN201410658751A CN104330677A CN 104330677 A CN104330677 A CN 104330677A CN 201410658751 A CN201410658751 A CN 201410658751A CN 104330677 A CN104330677 A CN 104330677A
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Abstract
The invention relates to a device and a method for testing an electronic type current transformer. The device comprises a standard current transformer, a to-be-tested electronic type current transformer, a digital type transformer calibrator, a strong current generator, a merging unit, a digital relay protection tester, a testing host, an impulse voltage generator, an impulse voltage divider, a power frequency withstand voltage machine, a peak value meter, a variable-frequency power source, a partial discharge instrument and a power frequency withstand voltage sub-container. According to the invention, independent testing process before installation of the to-be-tested electronic type current transformer and communication joint debugging testing process after connection of the transformer are monitored respectively by utilizing the device, then independent test for the current transformer after the joint debugging is carried out, and whether the electronic type current transformer passes through each testing process is judged through testing phenomena and testing results. The performance of the electronic type current transformer is detected by simulating various complex environments emerged in a network running scene, so that guarantee is provided for reliable detection for the electronic type transformer, and the quality of electronic transformer products is controlled from the source.
Description
Technical field
The present invention relates to and a kind ofly comprise electronic current mutual inductor test unit and the test method that electronic current mutual inductor is installed in power transformer the united test that carries out with power transformer communicating, belong to current transformer experimental technique field.
Background technology
Along with State Grid Corporation of China builds the proposition of strong intelligent grid, the various equipment be applied in electric system develop to intelligent direction, and electronic current mutual inductor is because its volume is little, lightweight, excellent insulating property, anti-electromagnetic interference capability strong, be convenient to realize the series of advantages such as intelligent, be widely used in electric system.Intelligent substation is the important component part of intelligent grid, and the application of electronic current mutual inductor is one of intelligentized important symbol of intelligent substation primary equipment.The fast development of intelligent substation, has promoted the progress of the practical of electronic current mutual inductor and commercialization.
Compared with conventional current mutual inductor, electronic current mutual inductor complex structure, be made up of the optics of precision or electricity device, the principle of induction of the two and sensing arrangement are completely different, therefore when electronic current mutual inductor is installed on power transformer, current existing traditional content of the test and test method inapplicable.Current national standard, industry standard are also not yet made stipulations to this.According to GB/T20840.8-2007 standard regulation, only clearly to electronic current mutual inductor with transformer with the use of front and back, electronic current mutual inductor should keep normal output state, but does not propose concrete test unit and test method; The electronic current mutual inductor Performance Detection scheme that State Grid Corporation of China formulates also only is carried out for independently electronic current mutual inductor, and the test method not being installed on the communication uniting and adjustment after transformer with regard to electronic current mutual inductor makes regulation.But see according to the on-the-spot hanging net operation result of current electronic current mutual inductor, the series of problems such as frequent appearance false is alert, signal interrupts suddenly, when one of reason carries out Performance Assessment to electronic current mutual inductor exactly, electronic current mutual inductor is not installed on the practical operation situation after power transformer included.
For guaranteeing electric system reliability service, accelerate to advance the unified strong intelligent grid construction of China, design a kind of electronic current mutual inductor and power transformer bulk testing method, the performance after comprehensive effective detected electrons formula current transformer is installed on transformer becomes the problem needing solution badly.
Summary of the invention
For the problems referred to above, the invention provides a kind of Integrated test facility and the method that comprise communication united test, under making the various extreme complex environment of on-the-spot appearance in simulation hanging net operation, carry out electronic current mutual inductor Performance Detection, using its test findings as the content of examination whether meeting GB/T20840.8-2007 and require, provide effective reference for whether electronic current mutual inductor meets hanging net operation condition.
Electronic current mutual inductor test unit of the present invention, comprises
Standard current transformer, for exporting high-precision current signal, as standard value to digital mutual inductor tester;
Electronic current mutual inductor to be measured, is connected with instrument successively by testing requirements, carries out every test;
Digital mutual inductor tester, for the output signal comparison of standard current transformer and electronic current mutual inductor to be measured being analyzed, draws the angular difference of electronic current mutual inductor to be measured, ratio information;
Strong current generator, for being connected with standard current transformer and electronic current mutual inductor to be measured, exports corresponding electric current to it successively by testing requirements;
Merge cells, for being connected with the FT3 delivery outlet of electronic current mutual inductor to be measured, exporting IEC61850-9-2 standard SV signal and pulse per second (PPS) synchronizing signal and accessing to digital mutual inductor tester;
Digital relay protection tester, exports for receiving merge cells IEC61850-9-2 normal data, and in monitoring communication united test process, whether merge cells exists packet loss, communication disruption, quality change phenomenon;
Test Host, for receiving digital mutual inductor tester data, carrying out Data Management Analysis, drawing test findings; And induced over voltage withstand test device when power frequency withstand test device, impulse voltage withstand test device and in short-term/long.
Wherein, described power frequency withstand test device comprises industrial frequency withstand voltage machine and peak value meter, for respectively to the electronic current mutual inductor to be measured during independent experiment with communicate united test time transformer carry out power frequency withstand test.Described impulse voltage withstand test device comprises impulse voltage generator and impulse voltage divider, for carrying out lightning impulse test to transformer during communication united test.Described in short-term/long time induced over voltage withstand test device comprise variable-frequency power sources, PD meter, peak value meter and industrial frequency withstand voltage capacitance divider, for communicate in united test process, induced over voltage withstand test is in short-term carried out to transformer and long time induced over voltage withstand test.
Apply the method that above-mentioned test unit carries out electronic current mutual inductor test, comprise the following steps:
S0 independent experiment: carry out independent experiment to electronic current mutual inductor to be measured, comprises low-voltage device power frequency withstand test and basic accuracy test, judges whether to pass through independent experiment by experimental phenomena and test findings;
S1 communicates united test: be installed on by electronic current mutual inductor to be measured on power transformer bushing lifting seat, carry out communication united test, comprise power frequency withstand test, in short-term induced over voltage withstand test, long time induced over voltage withstand test and lightning impulse test, monitor merge cells output state by digital relay protection tester, thus judge whether by communication united test;
S2 independent experiment: pulled down from power transformer by electronic current mutual inductor to be measured, carries out basic accuracy test to electronic current mutual inductor to be measured again, and whether the diversity judgement according to this test findings and S0 test figure passes through this independent experiment.
The step of described low-voltage device power frequency withstand test is as follows:
(1) electronic current mutual inductor power supply to be measured is inputted positive and negative end and utilize wire I short circuit, power ground end utilizes wire II to pick out, state that power switch button is in " leading to ";
(2) industrial frequency withstand voltage machine one end is connected with wire I, and the other end is connected on wire II;
(3) wiring is complete, checks errorless, passes to the voltage that the duration is the AC 2.0kV of 1min, carries out power frequency withstand test, observes whether have flashover and/or punch-through.
The concrete steps of the basic accuracy test in S0 and S2 step are as follows:
(1) seal in strong current generator electric current output lead loop by the primary connection port of standard current transformer, secondary output terminal is connected to digital mutual inductor tester simulating signal port;
(2) be enclosed within strong current generator electric current output lead by electronic current mutual inductor sensing head to be measured, the FT3 delivery outlet of electronic current mutual inductor to be measured is connected to FT3 signal receiving end corresponding to merge cells;
(3) merge cells IEC61850-9-2 standard SV outputs signal and pulse per second (PPS) synchronizing signal access digital mutual inductor tester;
(4) wiring is complete, strong current generator current output value is regulated by strong current generator control desk, be adjusted to 5% of rated current, 20%, 100%, 120% respectively, each current value corresponding utilizes digital mutual inductor tester gather 100 groups of angular differences and compare difference data.
The test criterion of S0 independent experiment is: test complete, flashover and punch-through is all there is not in low-voltage device power frequency withstand test process, after off-test, equipment can normally work, ensuing basic accuracy test result meets 0.2 grade of regulation in GB20840.8-2007, then this takes turns independent experiment and passes through, otherwise test is not passed through.
The step of S1 communication united test is as follows:
(1) electronic current mutual inductor to be measured is installed on power transformer bushing lifting seat;
(2) the FT3 delivery outlet of electronic current mutual inductor to be measured is accessed to FT3 signal receiving end corresponding to merge cells, merge cells IEC61850-9-2 standard SV output signal and pulse per second (PPS) synchronizing signal respectively correspondence access on digital relay protection tester optical interface; (3) wiring is complete, by power transformer according to GB1094.3-2003 standard regulation, carry out power frequency withstand test, in short-term induced over voltage withstand test successively, long time induced over voltage withstand test and lightning impulse test;
(4) in process of the test, utilize digital relay protection tester to monitor merge cells signal output state; comprise packet loss phenomenon, communication disruption phenomenon, quality change phenomenon; if there is not above-mentioned arbitrary phenomenon, then the united test that communicates passes through, otherwise is considered as not passing through.
The test criterion of S2 independent experiment is: basic accuracy test result still meets 0.2 grade of regulation in GB20840.8-2007, and is no more than the half of its basic accuracy error limit value with S0 accuracy test data difference, then this takes turns independent experiment and passes through.
On the basis of the electronic current mutual inductor independent experiment that the present invention specifies in GB20840.8-2007 standard, supplement the communication united test of electronic current mutual inductor and power transformer, the extreme complex environment that real simulation electronic current mutual inductor runs in substation field operational process, can investigate the many-sided measurement performance of mutual-inductor tester comprehensively, for the reliable calibrating of electronic mutual inductor provides safeguard, control the quality of electronic mutual inductor product from source.And adopt digital relay protection tester as signal monitoring equipment in communication united test process, easy to operate.
Accompanying drawing explanation
Fig. 1 is bulk test process flow diagram of the present invention;
Fig. 2 is low-voltage device power frequency withstand test device wiring diagram of the present invention;
Fig. 3 is the present invention's basic accuracy test device wiring diagram;
Fig. 4 is that the present invention communicates united test device wiring diagram;
In figure, 1, electronic current mutual inductor to be measured, 2, bushing lifting seat.
Embodiment
Below in conjunction with accompanying drawing, specific embodiment of the invention process is described:
As shown in Figure 1, electronic current mutual inductor bulk test process of the present invention is divided into following three steps:
S0, carry out independent experiment for electronic current mutual inductor to be measured, specifically comprise S01 low-voltage device power frequency withstand test, S02 basic accuracy test two pilot project;
S1, electronic current mutual inductor 1 to be measured is installed on power transformer bushing lifting seat 2, carry out the communication united test of the two, specifically comprise S11 power frequency withstand test, S12 induced over voltage withstand test in short-term, S13 long time induced over voltage withstand test, S14 lightning impulse test;
S2, electronic current mutual inductor to be measured to be removed from power transformer, carry out the independent experiment of electronic current mutual inductor to be measured, comprise the basic accuracy test of S21.
As shown in Figure 2 and Figure 3, the test unit that S0 independent experiment is used comprises:
Standard current transformer: this standard current transformer need through assay approval, and before the deadline, measurement range is (5 ~ 5000A)/5A, and accuracy of measurement is 0.02 grade, for exporting high-precision current signal to digital mutual inductor tester, as standard value;
Electronic current mutual inductor to be measured: be installed on the electronic current mutual inductor to be measured in power transformer, be connected with each instrument successively, accept detection, wherein export data to merge cells with FT3 form;
Digital mutual inductor tester: collection of simulant signal, IEC61850-9-2 format digital signals collecting can be accepted, class of accuracy is 0.05 grade, the electronic current mutual inductor of 0.2 (S) and above grade can be verified, for standard current transformer, current transformer to be measured are exported digital compare of analysis, draw the information such as current transformer angular difference to be measured, ratio;
Strong current generator: realize 50 ~ 5000A alternating current continuously adjustabe and export, provide current source to be for experiment;
Merge cells: the communication protocol of employing is IEC61850-9-2, and output port is light mouth, the method for synchronization is that light signal pulse per second (PPS) is synchronous, for receiving electronic current mutual inductor FT3 delivery outlet to be measured output signal;
Test Host: for receiving digital mutual inductor tester data, carrying out Data Management Analysis, drawing test findings;
Industrial frequency withstand voltage machine, peak value meter: for carrying out power frequency withstand test to electronic current mutual inductor to be measured.
S0 independent experiment can be divided into S01 low-voltage device power frequency withstand test, the test of S02 basic accuracy test two:
S01 low-voltage device power frequency withstand test operation steps:
(1) the positive and negative end of electronic current mutual inductor power input port to be measured is utilized wire I short circuit, power ground end utilizes wire II to pick out, state that power switch button is in " leading to ";
(2) be connected on wire I by industrial frequency withstand voltage machine one end, the other end is connected on wire II;
(3) wiring is complete, checks errorless, passes to the AC 2.0kV voltage that the duration is 1min, carries out power frequency withstand test;
The basic accuracy test operation steps of S02:
(1) seal in strong current generator electric current output lead loop by the primary connection port of standard current transformer, secondary output terminal is connected on digital mutual inductor tester simulating signal port;
(2) be enclosed within strong current generator electric current output lead by electronic current mutual inductor sensing head to be measured, the FT3 delivery outlet of electronic current mutual inductor to be measured is connected to FT3 signal receiving end corresponding to merge cells;
(3) merge cells IEC61850-9-2 SV output signal and pulse per second (PPS) synchronizing signal are connected on digital mutual inductor tester;
(4) wiring is complete, strong current generator current output value is regulated by strong current generator control desk, be adjusted to 5% of rated current, 20%, 100%, 120% respectively, each current value corresponding utilizes digital mutual inductor tester to gather 100 groups of data, i.e. 100 groups of ratios and angular difference.
S0 independent experiment test criterion: test complete, flashover and punch-through all do not occur in S01 process of the test, and (flashover is observable experimental phenomena in process of the test, puncture is sounded by the pleasant to the ear equipment of process of the test to judge), after off-test, equipment can normally work, S02 test findings meets 0.2 grade of regulation in GB20840.8-2007, then S0 independent experiment passes through, otherwise test is not passed through.
As shown in Figure 4; S1 electronic current mutual inductor communicates with power transformer the test unit of united test; comprise: electronic current mutual inductor to be measured, industrial frequency withstand voltage machine, peak value meter, merge cells, impulse voltage generator, impulse voltage divider and digital relay protection tester, variable-frequency power sources, PD meter, industrial frequency withstand voltage capacitance divider, wherein in industrial frequency withstand voltage machine, peak value meter, merge cells and S0, device shares.
Digital relay protection tester, exports for accepting merge cells IEC61850-9-2 normal data, and in monitoring communication united test process, whether merge cells exists the phenomenons such as packet loss, communication disruption, quality change;
Industrial frequency withstand voltage machine and peak value meter, for carrying out power frequency withstand test to transformer in communication united test process;
Variable-frequency power sources, PD meter, peak value meter and industrial frequency withstand voltage capacitance divider, for communicate in united test process, transformer to be carried out in short-term and long time induced over voltage withstand test;
Impulse voltage generator and impulse voltage divider, for applying lightning impulse voltage to transformer in communication united test process, carry out lightning impulse test.The connection of above test unit is techniques well known, does not repeat them here.
S1 communicate united test comprise S11 power frequency withstand test, S12 induced over voltage withstand test in short-term, S13 long time the pilot project such as induced over voltage withstand test, S14 lightning impulse test.
Test operation step is as follows:
(1) electronic current mutual inductor 1 to be measured is installed on power transformer bushing lifting seat 2;
(2) the FT3 delivery outlet of electronic current mutual inductor to be measured is connected to FT3 signal receiving end corresponding to merge cells, merge cells IEC61850-9-2 standard SV output signal and pulse per second (PPS) synchronizing signal respectively correspondence are connected on digital relay protection tester optical interface;
(3) wiring is complete, and by power transformer according to GB1094.3-2003 standard regulation, carry out the pilot projects such as S11 ~ S14 test successively, the specific operation process of these tests specifies in GB1094.3-2003 standard, do not repeat them here;
(4) in process of the test, utilize digital relay protection tester to monitor merge cells signal output state, judge whether to there is packet loss phenomenon, communication disruption phenomenon, quality change phenomenon.
S1 communication united test test criterion: carry out in communication united test process; need continue uninterruptedly to utilize digital relay protection tester to monitor merge cells data and export situation; if there is not the phenomenon such as packet loss, communication disruption, quality change; the united test that then communicates passes through, otherwise is considered as not passing through.
S2 electronic current mutual inductor independent experiment to be measured
After communication united test S1 is complete, current transformer to be measured is removed from power transformer, again carry out independent experiment according to the basic accuracy test method of S01, if test findings still can meet 0.2 grade of regulation in GB20840.8-2007, and be no more than the half of its basic accuracy error limit value with basic accuracy test data difference in S0, then test and pass through smoothly, otherwise then do not pass through.
Attached: GB20840.8-2007 standard 0.2 grade regulation
Claims (10)
1. an electronic current mutual inductor test unit, is characterized in that: comprise
Standard current transformer, for exporting high-precision current signal, as standard value to digital mutual inductor tester;
Electronic current mutual inductor to be measured, is connected with instrument successively by testing requirements, carries out every test;
Digital mutual inductor tester, for the output signal comparison of standard current transformer and electronic current mutual inductor to be measured being analyzed, draws the angular difference of electronic current mutual inductor to be measured, ratio information;
Strong current generator, for being connected with standard current transformer and electronic current mutual inductor to be measured, exports corresponding electric current to it successively by testing requirements;
Merge cells, for being connected with the FT3 delivery outlet of electronic current mutual inductor to be measured, exporting IEC61850-9-2 standard SV signal and pulse per second (PPS) synchronizing signal and accessing to digital mutual inductor tester;
Digital relay protection tester, exports for receiving merge cells IEC61850-9-2 normal data, and in monitoring communication united test process, whether merge cells exists packet loss, communication disruption, quality change phenomenon;
Test Host, for receiving digital mutual inductor tester data, carrying out Data Management Analysis, drawing test findings; And induced over voltage withstand test device when power frequency withstand test device, impulse voltage withstand test device and in short-term/long.
2. electronic current mutual inductor test unit according to claim 1, it is characterized in that: described power frequency withstand test device comprises industrial frequency withstand voltage machine and peak value meter, for respectively to the electronic current mutual inductor to be measured during independent experiment with communicate united test time transformer carry out power frequency withstand test.
3. electronic current mutual inductor test unit according to claim 1, is characterized in that: described impulse voltage withstand test device comprises impulse voltage generator and impulse voltage divider, for carrying out lightning impulse test to transformer during communication united test.
4. electronic current mutual inductor test unit according to claim 1, it is characterized in that: described in short-term/long time induced over voltage withstand test device comprise variable-frequency power sources, PD meter, peak value meter and industrial frequency withstand voltage capacitance divider, for communicate in united test process, induced over voltage withstand test is in short-term carried out to transformer and long time induced over voltage withstand test.
5. application rights requires that described in 1, device carries out the method for electronic current mutual inductor test, is characterized in that comprising the following steps:
S0 independent experiment: carry out independent experiment to electronic current mutual inductor to be measured, comprises low-voltage device power frequency withstand test and basic accuracy test, judges whether to pass through independent experiment by experimental phenomena and test findings;
S1 communicates united test: be installed on by electronic current mutual inductor to be measured on power transformer bushing lifting seat, carry out communication united test, comprise power frequency withstand test, in short-term induced over voltage withstand test, long time induced over voltage withstand test and lightning impulse test, monitor merge cells output state by digital relay protection tester, thus judge whether by communication united test;
S2 independent experiment: pulled down from power transformer by electronic current mutual inductor to be measured, carries out basic accuracy test to electronic current mutual inductor to be measured again, and whether the diversity judgement according to this test findings and S0 test figure passes through this independent experiment.
6. the test method of electronic current mutual inductor according to claim 5, is characterized in that: the step of described low-voltage device power frequency withstand test is as follows:
Electronic current mutual inductor power supply to be measured is inputted positive and negative end and utilizes wire I short circuit, power ground end utilizes wire II to pick out, state that power switch button is in " leading to ";
Industrial frequency withstand voltage machine one end is connected with wire I, and the other end is connected on wire II;
Wiring is complete, checks errorless, passes to the voltage that the duration is the AC 2.0kV of 1min, carries out power frequency withstand test, observes whether have flashover and/or punch-through.
7. the test method of electronic current mutual inductor according to claim 5, is characterized in that: the concrete steps of the basic accuracy test in S0 and S2 step are as follows:
Sealed in by the primary connection port of standard current transformer in strong current generator electric current output lead loop, secondary output terminal is connected to digital mutual inductor tester simulating signal port;
Be enclosed within by electronic current mutual inductor sensing head to be measured on strong current generator electric current output lead, the FT3 delivery outlet of electronic current mutual inductor to be measured is connected to FT3 signal receiving end corresponding to merge cells;
Merge cells IEC61850-9-2 standard SV outputs signal and pulse per second (PPS) synchronizing signal access digital mutual inductor tester;
Wiring is complete, regulates strong current generator current output value, be adjusted to 5% of rated current, 20%, 100%, 120% respectively by strong current generator control desk, and each current value corresponding utilizes digital mutual inductor tester gather 100 groups of angular differences and compare difference data.
8. the test method of electronic current mutual inductor according to claim 7, it is characterized in that: the test criterion of S0 independent experiment is: test complete, flashover and punch-through is all there is not in low-voltage device power frequency withstand test process, after off-test, equipment can normally work, ensuing basic accuracy test result meets 0.2 grade of regulation in GB20840.8-2007, then this takes turns independent experiment and passes through, otherwise test is not passed through.
9. the test method of electronic current mutual inductor according to claim 5, is characterized in that: the step of S1 communication united test is as follows:
(1) electronic current mutual inductor to be measured is installed on power transformer bushing lifting seat;
(2) the FT3 delivery outlet of electronic current mutual inductor to be measured is accessed to FT3 signal receiving end corresponding to merge cells, merge cells IEC61850-9-2 standard SV output signal and pulse per second (PPS) synchronizing signal respectively correspondence access on digital relay protection tester optical interface;
(3) wiring is complete, by power transformer according to GB1094.3-2003 standard regulation, carry out power frequency withstand test, in short-term induced over voltage withstand test successively, long time induced over voltage withstand test and lightning impulse test;
(4) in process of the test, utilize digital relay protection tester to monitor merge cells signal output state; comprise packet loss phenomenon, communication disruption phenomenon, quality change phenomenon; if there is not above-mentioned arbitrary phenomenon, then the united test that communicates passes through, otherwise is considered as not passing through.
10. the test method of electronic current mutual inductor according to claim 7, it is characterized in that: the test criterion of S2 independent experiment is: basic accuracy test result still meets 0.2 grade of regulation in GB20840.8-2007, and being no more than the half of its basic accuracy error limit value with S0 accuracy test data difference, then this takes turns independent experiment and passes through.
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| CN109946571A (en) * | 2019-01-30 | 2019-06-28 | 上海二十冶建设有限公司 | The method for carrying out voltage transformer induced over voltage withstand test using relay-protection tester |
| CN113325354A (en) * | 2021-04-23 | 2021-08-31 | 中国电力科学研究院有限公司 | System and method for testing errors of electronic mutual inductor for distribution network |
| CN113325354B (en) * | 2021-04-23 | 2023-12-26 | 中国电力科学研究院有限公司 | System and method for testing errors of electronic transformer for distribution network |
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