CN102998650A - Device and method for calibrating optical current transformers - Google Patents
Device and method for calibrating optical current transformers Download PDFInfo
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- CN102998650A CN102998650A CN 201210349829 CN201210349829A CN102998650A CN 102998650 A CN102998650 A CN 102998650A CN 201210349829 CN201210349829 CN 201210349829 CN 201210349829 A CN201210349829 A CN 201210349829A CN 102998650 A CN102998650 A CN 102998650A
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Abstract
本发明的一种光电流互感器校验装置及校验方法，包括大电流测试、控制模块和显示模块，实现了在多种现场条件下对光光电流互感器进行校验，且现场校验的平均时间少于30分钟，本发明能为数字化变电站光电流互感器的现场检验提供完整的解决方案，还能为数字化变电站光电流互感器的异常情况和事故后分析提供依据，很好的预防了光电流互感器发生故障的可能，很大程度上确保了供电可靠性。适用于各种光电流互感器的校验领域。
A photoelectric current transformer calibration device and calibration method of the present invention, including a large current test, a control module and a display module, realize the calibration of the photoelectric current transformer under various field conditions, and the field calibration The average time is less than 30 minutes. The invention can provide a complete solution for the on-site inspection of the photoelectric current transformer in the digital substation, and can also provide a basis for the abnormal situation and post-accident analysis of the photoelectric current transformer in the digital substation, which is a good prevention The possibility of photocurrent transformer failure is eliminated, and the reliability of power supply is largely ensured. It is suitable for the calibration field of various photoelectric current transformers.
Description
Technical field
The present invention relates to a kind of calibration equipment and method of calibration, relate in particular to a kind of calibration equipment and method of calibration that is applied to optic current transformer.
Background technology
Nowadays, the Intelligent transformer station technology is got over ripe, and its ingredient becomes corresponding hot research object.Unconventional mutual inductor uses unconventional mutual inductor to become a kind of inevitable trend as power system measuring and relay protection signal source because its unique advantage is subject to research and the support of many mutual inductor producers and power consumer.
The mutual inductor general designation of new generation that will be different from traditional electromagnetic type voltage/current mutual inductor in the world is defined as unconventional mutual inductor.According to the difference of its ultimate principle, unconventional mutual inductor (NCIT) is according to its active passive type and active formula two large classes of also can being divided into whether.
The output signal of optic current transformer is different from traditional CT, and it no longer is that the ratings of traditional CT is the alternating current output of 5A or 1A, but uses light signal output.Therefore traditional tester can't be competent at the verifying work to light signal or the output of small voltage signal.
Optic current transformer appears in the intelligent grid as a kind of novel device, and this has brought a new problem for on-the-spot operating maintenance personnel.In operational process, run unit can come by the real-time current of monitoring mutual inductor the self-condition of judgment device, but in the situation that can't know heavy current impact when fault occurs and run without interruption for a long time, equipment can normally move and the precision of equipment whether qualified.
In the logout at home and abroad; the practical application of optic current transformer does not have full maturity, and when optic current transformer breaks down, will be so that secondary current generation distortion or fluctuation in the station; even can cause the misoperation of protective device, consequence is quite serious.With reference to the optic current transformer fault case of domestic 07 year a certain current conversion station, because the measuring circuit of optic current transformer in operational process detects the sharp wave waveform, caused the misoperation of protective device.Can see that from plant failure filtering the action of device is exactly because a sharp wave of measuring circuit causes.Current Domestic has proposed many methods in order to investigate the unusual of optic current transformer, but all can not effectively solve problems, and its main cause is as follows:
(1) device wiring limitation is large, and the part occasion can't be used;
(2) device is heavier, needs many people's operations;
(3) device can't carry out verification to optic current transformer;
(4) the complicated checking time of wiring is very long, and general checking time was greater than 2 hours.
In order to improve the operation maintenance ability to optic current transformer, the fault of prevention, investigation optic current transformer, and make it after operation a period of time, the verification personnel can carry out accuracy test to it and detect and judge its working condition.Therefore all be very important problem to the research of optic current transformer verifying attachment and method thereof all the time.
Summary of the invention
In order to address the above problem, the present invention is by developing a kind of quadratic behavior verifying attachment that is adapted to the digital transformer substation optic current transformer, can be in transformer station carry out the verification of optic current transformer under different operating environment and the place, and can save a large amount of human and material resources, time is finished verifying work, and a kind of optic current transformer calibration equipment of the present invention and method of calibration are as described below:
1. an optic current transformer calibration equipment comprises high-current test, control module and display module, it is characterized in that:
Described high-current test module is drawn together by 3 to 6 capacitors and is formed;
Described control module is comprised of inverter;
Described display module comprises by optical signal transceiver unit and LCDs signal processes and displays unit and forming.
The high-current module of 3 to 6 capacitor compositions discharges to reach the impact effect of the large electric current of output, and change into alternating current as measuring current by the direct current that inverter is emitted electric capacity, and display module is with module controls, light signal simulation and Data Comparison function, and can be directly under different communication abnormality states, the warning content of sending.
Test module can be installed in test point, and control module can be built up in light stream and become near the lead-out terminal case, realizes control to test module by communication, installs conveniently, and applicability is stronger.
According to a kind of optic current transformer calibration equipment of the present invention, it is characterized in that, adopt wireless communication mode between the described modules.
Purpose of design is herein, and wireless communication mode cooperates the Dual module transmission, so that module adaptive is strong, transmission is reliable, good economy performance.
A kind of optic current transformer method of calibration, based on above-mentioned a kind of optic current transformer calibration equipment, its step is as described below:
1. communication state detects;
2. parameter preset sends output order by wireless signal communication to test module;
3. after test module receives output order, confirm large current amplitude and time, optic current transformer is exported large electric current test;
4. optic current transformer obtains primary side and secondary light signal;
5. with the signal input control module that obtains in the step 4;
6. control module receives light signal and carries out data-switching, and these data and sampled value, output valve are compared;
7. show by display module, and the parameter that this value is back in the step 2 is preset.
Use a kind of optic current transformer calibration equipment of the present invention and method of calibration to obtain following beneficial effect:
1. a kind of optic current transformer calibration equipment of the present invention and method of calibration have realized under the various field condition light optic current transformer being carried out verification, and be less than 30 minutes the averaging time of field-checking.
2. a kind of optic current transformer calibration equipment of the present invention and method of calibration can provide total solution for the field test of digital transformer substation optic current transformer;
3. a kind of optic current transformer calibration equipment of the present invention and method of calibration, can also provide foundation for abnormal conditions and the accident post analysis of digital transformer substation optic current transformer, the possibility of well having prevented optic current transformer to break down has been guaranteed power supply reliability to a great extent.
Description of drawings
Fig. 1 is the concrete structure synoptic diagram of the device part of a kind of optic current transformer calibration equipment of the present invention and method of calibration;
Fig. 2 is the particular flow sheet of the method part of a kind of optic current transformer calibration equipment of the present invention and method of calibration.
Embodiment
Below in conjunction with drawings and Examples of the present invention a kind of optic current transformer calibration equipment and method of calibration are further described.
Embodiment
As depicted in figs. 1 and 2, a kind of optic current transformer calibration equipment comprises high-current test, control module and display module, it is characterized in that:
Described high-current test module is drawn together by 3 to 6 capacitors and is formed;
Described control module is comprised of inverter;
Described display module comprises by optical signal transceiver unit and LCDs signal processes and displays unit and forming.
The high-current module of 3 to 6 capacitor compositions discharges to reach the impact effect of the large electric current of output, and change into alternating current as measuring current by the direct current that inverter is emitted electric capacity, display module is with module controls, light signal simulation and Data Comparison function, and can be directly under different communication abnormality states, the warning content of sending.
Whether in the present embodiment, the High-current output electric current is 300A, and continuous output time is 0.5s, come current amplitude and the waveform of judgment means output to meet the requirements by oscillographic demonstration and control module Display panel.
Test module can be installed in test point, and control module can be built up in light stream and become near the lead-out terminal case, realizes control to test module by communication, installs conveniently, and applicability is stronger.
According to a kind of optic current transformer calibration equipment of the present invention, it is characterized in that, adopt wireless communication mode between the described modules.
Purpose of design is herein, and wireless communication mode cooperates the Dual module transmission, so that module adaptive is strong, transmission is reliable, good economy performance.
A kind of optic current transformer method of calibration, based on above-mentioned a kind of optic current transformer calibration equipment, its step is as described below:
1. communication state detects;
2. parameter preset sends output order by wireless signal communication to test module;
3. after test module receives output order, confirm large current amplitude and time, optic current transformer is exported large electric current test;
4. optic current transformer obtains primary side and secondary light signal;
5. with the signal input control module that obtains in the step 4;
6. control module receives light signal and carries out data-switching, and these data and sampled value, output valve are compared;
7. show by display module, and the parameter that this value is back in the step 2 is preset.
A kind of optic current transformer calibration equipment of the present invention and method of calibration, realized under the various field condition, the light optic current transformer being carried out verification, and be less than 30 minutes the averaging time of field-checking, the present invention can provide total solution for the field test of digital transformer substation optic current transformer, can also provide foundation for abnormal conditions and the accident post analysis of digital transformer substation optic current transformer, the possibility of well having prevented optic current transformer to break down has been guaranteed power supply reliability to a great extent.Be applicable to the verification field of various optic current transformers.
Claims (3)
1. an optic current transformer calibration equipment comprises high-current test, control module and display module, it is characterized in that:
Described high-current test module is drawn together by 3 to 6 capacitors and is formed;
Described control module is comprised of inverter;
Described display module comprises by optical signal transceiver unit and LCDs signal processes and displays unit and forming.
2. a kind of optic current transformer calibration equipment as claimed in claim 1 is characterized in that, adopts wireless communication mode between the described modules.
3. optic current transformer method of calibration, based on above-mentioned a kind of optic current transformer calibration equipment, its step is as described below:
1. communication state detects;
2. parameter preset sends output order by wireless signal communication to test module;
3. after test module receives output order, confirm large current amplitude and time, optic current transformer is exported large electric current test;
4. optic current transformer obtains primary side and secondary light signal;
5. with the signal input control module that obtains in the step 4;
6. control module receives light signal and carries out data-switching, and these data and sampled value, output valve are compared;
7. show by display module, and the parameter that this value is back in the step 2 is preset.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210349829 CN102998650A (en) | 2012-09-19 | 2012-09-19 | Device and method for calibrating optical current transformers |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210349829 CN102998650A (en) | 2012-09-19 | 2012-09-19 | Device and method for calibrating optical current transformers |
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| CN102998650A true CN102998650A (en) | 2013-03-27 |
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| CN 201210349829 Pending CN102998650A (en) | 2012-09-19 | 2012-09-19 | Device and method for calibrating optical current transformers |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104020435A (en) * | 2014-06-16 | 2014-09-03 | 国网上海市电力公司 | Withstand voltage and error calibrating device for metering low-voltage current transformer |
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2012
- 2012-09-19 CN CN 201210349829 patent/CN102998650A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104020435A (en) * | 2014-06-16 | 2014-09-03 | 国网上海市电力公司 | Withstand voltage and error calibrating device for metering low-voltage current transformer |
| CN104020435B (en) * | 2014-06-16 | 2017-04-05 | 国网上海市电力公司 | A kind of metering low-voltage current mutual inductor pressure and error verification device of insulation |
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Application publication date: 20130327 |