CN105043229A - Device and method for measuring arc contact contacting travel of high-voltage SF6 circuit breaker - Google Patents
Device and method for measuring arc contact contacting travel of high-voltage SF6 circuit breaker Download PDFInfo
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- CN105043229A CN105043229A CN201510229111.4A CN201510229111A CN105043229A CN 105043229 A CN105043229 A CN 105043229A CN 201510229111 A CN201510229111 A CN 201510229111A CN 105043229 A CN105043229 A CN 105043229A
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- angular displacement
- main shaft
- arcing contact
- displacement
- rectilinear path
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Abstract
The invention provides a device and a method for measuring the arc contact contacting travel of a high-voltage SF6 circuit breaker. The device comprises an angular displacement measurement module, an angular displacement and linear displacement conversion module, and a data acquisition and processing module. The angular displacement measurement module is used for measuring the angular displacement of the main shaft of a circuit breaker. The angular displacement and linear displacement conversion module is used for acquiring the corresponding relationship between the angular displacement of the main shaft of the circuit breaker and the linear displacement of an arc contact of the circuit breaker. The data acquisition and processing module is used for calculating the linear travel of the arc contact. The method is realized based on the above device and solves the problem in the prior art that conventional linear sensors cannot be applied to high-voltage switchgears can be solved. The linear displacement of the arc contact is ingeniously and indirectly acquired based on the corresponding relationship between the angular displacement and the linear displacement by means of a small and lightweight angular displacement sensor. In this way, high-precision measurement tasks can be realized by means of the simple device. The measurement on the contacting travel alone of the arc contact of the high-voltage SF6 circuit breaker is realized.
Description
Technical field
This product design relates to the on-line monitoring of power product appliance field switchgear, particularly a kind of measurement mechanism and method measuring high-voltage sf6 circuit breaker arcing contact contacting travel.
Background technology
The method mainly dropout current cumulative method of existing calculating circuit breaker electrical endurance, it calculates electric life according to the quality loss of contact, is the cumulative method of the electric life curve based on primary cut-out.But the contact electrical wear degree under different short-circuit current is different, and its wear extent and short-circuit current size not linear.Only judge that contact burning amount is inadequate with accumulative dropout current; Therefore, judge that contact burning amount will consider the different wear extenies of cut-offfing different short-circuit current at every turn and producing, thus bring very large difficulty to the detection of the electric life of high-voltage sf6 circuit breaker/GIS.Therefore, need to reform existing electric life detected status, can not only depend on dropout current size, and by the electric life monitoring and assess isolating switch overlapping time during reflection high-voltage sf6 circuit breaker/GIS switch motion, thus be expected to obtain electric life monitoring result comparatively accurately, make up the defect that there is no the effective electric life monitoring technology of high-voltage sf6 circuit breaker/GIS and method at present both at home and abroad, for the upgrading of high-voltage sf6 circuit breaker/GIS "smart" products provides Theory and technology to instruct.
For high-voltage sf6 circuit breaker/GIS, during its switch motion, the duration of contact of sound arcing contact is the important indicator weighing primary cut-out electric life.But not easily measuring the duration of contact of sound arcing contact in actual applications, and there is between the duration of contact of sound arcing contact and the independent contacting travel of arcing contact corresponding relation, therefore can carry out calculation contact time by measuring the independent contacting travel of arcing contact.
In actual measurement, in order to ensure the accuracy that the independent contacting travel of arcing contact is measured, must carry out high-precision measurement to killer switch actuating length curve, its precision should 0.5mm rank (or higher).But: high-precision measurement often means complicated measurement mechanism.
Summary of the invention
Based on this, the invention discloses the measurement mechanism of the lonely contact stroke of a kind of high-voltage sf6 circuit breaker;
Described device comprises angle displacement measurement module, angular displacement and straight-line displacement conversion module and data acquisition and procession module;
Described angle displacement measurement module comprises angular displacement sensor, and described angular displacement for obtaining the angular displacement of breaker main shaft, and is sent to data acquisition and procession module by described angular displacement sensor;
Described angular displacement and straight-line displacement conversion module are used for the angular displacement of the breaker main shaft stored and arcing contact rectilinear path fits to corresponding relation curve and sends to data acquisition and procession module;
Described data acquisition and procession module, for calculating arcing contact contacting travel according to the angular displacement of described breaker main shaft and described corresponding relation.
Accompanying drawing explanation
Fig. 1 is isolating switch cut-away view in an embodiment;
Fig. 2 is the design structure diagram of these works in an embodiment;
Fig. 3 is the angular displacement of separating brake process and straight-line displacement stroke statistics in an embodiment;
Fig. 4 is making process angular displacement and straight-line displacement stroke statistics in an embodiment;
Fig. 5 is separating brake process arcing contact stroke fitting result and actual result comparison diagram in an embodiment;
Fig. 6 is arcing contact stroke curve fit error curve in an embodiment;
Fig. 7 is making process arcing contact stroke fitting result and actual result comparison diagram in an embodiment;
Fig. 8 is making process arcing contact stroke curve fit error curve figure in an embodiment.
Embodiment
Below in conjunction with accompanying drawing 1-8 and embodiment, the present invention is further illustrated:
In one embodiment, the invention discloses the measurement mechanism of the lonely contact stroke of a kind of high-voltage sf6 circuit breaker;
Described device comprises angle displacement measurement module, angular displacement and straight-line displacement conversion module and data acquisition and procession module;
Described angle displacement measurement module comprises angular displacement sensor, and described angular displacement for obtaining the angular displacement of breaker main shaft, and is sent to data acquisition and procession module by described angular displacement sensor;
Described angular displacement and straight-line displacement conversion module are used for the angular displacement of the breaker main shaft stored and arcing contact rectilinear path fits to corresponding relation curve and sends to data acquisition and procession module;
Described data acquisition and procession module, for calculating arcing contact contacting travel according to the angular displacement of described breaker main shaft and described corresponding relation.
Further, described data acquisition and procession module comprises the data acquisition processing circuit based on ARM chip.
The conversion module of angular displacement disclosed in the present embodiment and straight-line displacement is measured and Fitting Analysis by experiment, obtain the corresponding relation between breaker main shaft angular displacement and arcing contact rectilinear path, thus according to the angular displacement Drawing of Curve arcing contact stroke curve of isolating switch, and the rectilinear path calculating arcing contact according to the angular displacement recorded can be realized.ARM digital sampling and processing adopts the data acquisition processing circuit based on ARM chip, according to the angular displacement of angular displacement sensor input with carry out data processing based on the data processor of the corresponding relation between breaker main shaft angular displacement and arcing contact rectilinear path, thus obtain the rectilinear path of arcing contact.The present embodiment is difficult to rectilinear transducer the problem applying to high-tension switch gear, the angular displacement sensor adopting small volume and less weight is proposed, according to the corresponding relation of angular displacement and straight-line displacement, ingeniously indirectly obtain arcing contact rectilinear path, achieve the task of realizing high-acruracy survey with simple mechanism, achieve the measurement to the independent contacting travel of high-voltage sf6 circuit breaker arcing contact.
In one embodiment, described angular displacement sensor is WDD35D4 type resistance-type angular displacement sensor.
The present embodiment considers the convenience that described angular displacement sensor is installed, and the necessity of electromagnetic screen and the requirement of measuring accuracy, have selected WDD35D4 type resistance-type angular displacement sensor.The WDD35D4 type resistance-type angular displacement sensor that the present embodiment adopts, screw thread on it is just consistent with the general coupling shaft bore of breaker main shaft, avoid machining, its output interface has good design of Electromagnetic Shielding, by jamproof twisted-pair feeder and ARM model calling, the interference free performance that guarantee system is good, its precision also can meet measurement requirement.
In one embodiment, the angular displacement of the breaker main shaft of described storage and arcing contact rectilinear path are specially to utilize and are arranged on the angular displacement sensor on main shaft and the linear displacement transducer bottom insulated tension pole measures spindle angular displacement and arcing contact straight-line displacement stroke respectively when circuit-breaker switching on-off.
The present embodiment introduces measurement spindle angular displacement and how arcing contact straight-line displacement stroke obtains, and angular displacement in this device and straight line modular converter actual be a conception of species or disposal route, instead of specifically in kind, do not use linear displacement transducer in this device.
In one embodiment, the angular displacement of breaker main shaft that obtains of described measurement and arcing contact rectilinear path comprise spindle angular displacement and arcing contact straight-line displacement stroke when measuring 25-45 divide-shut brake respectively.
In the present embodiment, isolating switch divides, the data statistics result of closing operation 30 times is as shown in accompanying drawing 3 (separating brake) and accompanying drawing 4 (combined floodgate).Separating brake process straight-line displacement magnitude of voltage maximum deviation 3.3% (0.06V), angular displacement magnitude of voltage maximum deviation 3.2% (0.08V).Making process straight-line displacement magnitude of voltage maximum deviation 1.1% (0.02V), angular displacement magnitude of voltage maximum deviation 0.3% (0.008V).Can obtain thus, when repetitive measurement, the dispersiveness of isolating switch straight-line displacement and angular displacement curve is less.
In one embodiment, utilize the cftool instrument in Matlab software that spindle angular displacement during 25-45 divide-shut brake and arcing contact straight-line displacement stroke are fitted to the corresponding relation curve of the angular displacement of separating brake process and making process breaker main shaft and the rectilinear path of arcing contact respectively.
In order to verify that the present embodiment fits to the accuracy of corresponding relation curve, in extraction under normal circumstances, AMAMS realistic model is utilized to emulate breaker main shaft angular displacement and arcing contact stroke;
Attachedly Figure 5 shows that the result after the angular displacement of separating brake process interrupt road device main shaft and the rectilinear path matching of arcing contact and actual emulation results contrast figure, error of fitting as shown in Figure 6.As can be seen from the figure, the result after matching and actual result are well coincide.
The fitting result actual emulation results contrast figure of breaker closing process spindle angular displacement and arcing contact stroke curve as shown in Figure 7; The fit error curve of breaker closing process arcing contact straight-line displacement stroke curve as shown in Figure 8.Equally, as can be seen from the figure, the result after matching and actual result are well coincide.
In one embodiment, the angular displacement of described separating brake process interrupt road device main shaft and the rectilinear path of arcing contact corresponding relation curve equation as follows:
y＝A
4x
4+A
3x
3+A
2x
2+A
1x
1+A
0
Wherein, x represents spindle angular displacement, and y represents arcing contact rectilinear path, and A0 ~ A4 is respectively corresponding multinomial coefficient.
In described making process, the corresponding relation curve equation of the angular displacement of breaker main shaft and the rectilinear path of arcing contact is as follows:
y＝B
5x
5+B
4x
4+B
3x
3+B
2x
2+B
1x
1+B
0
Wherein, x represents spindle angular displacement, and y represents arcing contact rectilinear path, and B0 ~ B5 is respectively corresponding multinomial coefficient.
The measurement mechanism of the independent contacting travel of high-voltage sf6 circuit breaker arcing contact of the present invention has the following advantages:
(1) practicality: this device can adapt to the requirement of different substation, different Main Wiring, different secondary loop design, not by the impact of external environment.
(2) simplicity: this device solves the problem that rectilinear transducer is difficult to be applied to high-tension switch gear, achieves complicated measurement task by easy-to-install angular displacement sensor.
(3) real-time: this device can be measured spindle angular displacement in real time and calculate corresponding arcing contact rectilinear path fast by data processing module.
(4) dirigibility: the ARM data processing module of this device can be connected with different control centers, thus makes the application of this device more flexible.
(5) economy: this device has good technical economical index, has powerful market potential.
In one embodiment, disclose the measuring method of the lonely contact stroke of a kind of high-voltage sf6 circuit breaker, said method comprising the steps of:
S100, angle displacement measurement module is utilized to measure the angular displacement of breaker main shaft;
S200, the angular displacement of the breaker main shaft of storage and arcing contact rectilinear path are fitted to corresponding relation curve;
S300, calculate the independent contacting travel of arcing contact based on the angular displacement of described breaker main shaft and the corresponding relation curve between the angular displacement of described breaker main shaft and arcing contact rectilinear path.
Method described in the present embodiment solves the problem that rectilinear transducer is difficult to be applied to high-tension switch gear, adopt the angular displacement sensor of small volume and less weight, according to the corresponding relation of angular displacement and straight-line displacement, ingeniously indirectly obtain arcing contact rectilinear path, achieve the task of realizing high-acruracy survey with simple mechanism, achieve the measurement to high-voltage sf6 circuit breaker arcing contact contacting travel.
Above content is in conjunction with concrete preferred implementation further description made for the present invention; can not assert that the specific embodiment of the present invention is only limitted to this; for general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; some simple deduction or replace can also be made, all should be considered as belonging to the present invention by submitted to claims determination protection domain.
Claims (8)
1. a measurement mechanism for the lonely contact stroke of high-voltage sf6 circuit breaker, is characterized in that:
Described device comprises angle displacement measurement module, angular displacement and straight-line displacement conversion module and data acquisition and procession module;
Described angle displacement measurement module comprises angular displacement sensor, and described angular displacement for obtaining the angular displacement of breaker main shaft, and is sent to data acquisition and procession module by described angular displacement sensor;
Described angular displacement and straight-line displacement conversion module are used for the angular displacement of the breaker main shaft stored and arcing contact rectilinear path fits to corresponding relation curve and sends to data acquisition and procession module;
Described data acquisition and procession module, for calculating arcing contact contacting travel according to the angular displacement of described breaker main shaft and described corresponding relation.
2. device according to claim 1, is characterized in that: preferred, resistance-type angular displacement sensor selected by described angular displacement sensor.
3. device according to claim 1, is characterized in that: the angular displacement of the breaker main shaft of described storage utilizes the angular displacement sensor be arranged on main shaft to record; The arcing contact rectilinear path of described storage utilizes the linear displacement transducer be arranged on bottom insulated tension pole to record.
4. device according to claim 3, is characterized in that: the angular displacement of the breaker main shaft that described measurement obtains and arcing contact rectilinear path comprise spindle angular displacement and arcing contact straight-line displacement stroke when measuring 25-45 divide-shut brake respectively.
5. device according to claim 4, is characterized in that: utilize the cftool instrument in Matlab software that spindle angular displacement during 25-45 divide-shut brake and arcing contact straight-line displacement stroke are fitted to the corresponding relation curve of the angular displacement of separating brake process and making process breaker main shaft and the rectilinear path of arcing contact respectively.
6. device according to claim 5, is characterized in that: the corresponding relation curve equation of the angular displacement of described separating brake process interrupt road device main shaft and the rectilinear path of arcing contact is as follows:
y＝A
4X
4+A
3x
3+A
2x
2+A
1x
1+A
0
Wherein, x represents spindle angular displacement, and y represents arcing contact rectilinear path, and A0 ~ A4 is respectively corresponding multinomial coefficient.
7. device according to claim 6, is characterized in that: in described making process, the corresponding relation curve equation of the angular displacement of breaker main shaft and the rectilinear path of arcing contact is as follows:
y＝B
5x
5+b
4x
4+B
3x
3+B
2x
2+B
1x
1+B
0
Wherein, x represents spindle angular displacement, and y represents arcing contact rectilinear path, and B0 ~ B5 is respectively corresponding multinomial coefficient.
8. utilize a measuring method for the lonely contact stroke of the high-voltage sf6 circuit breaker of the arbitrary device of claim 1 to 7, it is characterized in that, said method comprising the steps of:
S100, angle displacement measurement module is utilized to measure the angular displacement of breaker main shaft;
S200, the angular displacement of the breaker main shaft of storage and arcing contact rectilinear path are fitted to corresponding relation curve;
S300, calculate arcing contact contacting travel based on the angular displacement of described breaker main shaft and the corresponding relation curve between the angular displacement of described breaker main shaft and arcing contact rectilinear path.
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| CN201510229111.4A CN105043229A (en) | 2015-05-07 | 2015-05-07 | Device and method for measuring arc contact contacting travel of high-voltage SF6 circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510229111.4A CN105043229A (en) | 2015-05-07 | 2015-05-07 | Device and method for measuring arc contact contacting travel of high-voltage SF6 circuit breaker |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106895809A (en) * | 2017-04-28 | 2017-06-27 | 厦门大学 | A kind of Medium Voltage Switchgear contact travel measuring method |
| CN112504196A (en) * | 2021-02-07 | 2021-03-16 | 南京菲迈斯智能科技有限公司 | Hierarchical electric power thing networking contact displacement acquisition sensor |
| CN113155421A (en) * | 2021-03-17 | 2021-07-23 | 山东泰开电器机构有限公司 | Method, system, terminal and storage medium for detecting mechanical characteristics of high-voltage circuit breaker |
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| CN203881902U (en) * | 2013-11-26 | 2014-10-15 | 国家电网公司 | On-line monitoring system for current of switching-on and switching-off coil and travel of moving contact of high-voltage circuit breaker |
| CN104166773A (en) * | 2014-08-26 | 2014-11-26 | 新疆特变电工自控设备有限公司 | Method for measuring relation between stroke of circuit breaker contact and rotation angle of main shaft |
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2015
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| DE19936970A1 (en) * | 1999-08-05 | 2001-03-15 | Kostal Leopold Gmbh & Co Kg | Sensor device for detecting a physical quantity to be measured and method for testing its function detects a value for this quantity through a comparator by comparing electrical voltage and reference signals as digital or analog. |
| EP1586853A1 (en) * | 2004-04-16 | 2005-10-19 | General Electric Company | A capacitive sensor and method for non-contacting gap and dielectric medium measurement |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106895809A (en) * | 2017-04-28 | 2017-06-27 | 厦门大学 | A kind of Medium Voltage Switchgear contact travel measuring method |
| CN106895809B (en) * | 2017-04-28 | 2019-02-01 | 厦门大学 | A kind of Medium Voltage Switchgear contact travel measurement method |
| CN112504196A (en) * | 2021-02-07 | 2021-03-16 | 南京菲迈斯智能科技有限公司 | Hierarchical electric power thing networking contact displacement acquisition sensor |
| CN112504196B (en) * | 2021-02-07 | 2021-09-03 | 广西电网有限责任公司电力科学研究院 | Hierarchical electric power thing networking contact displacement acquisition sensor |
| CN113155421A (en) * | 2021-03-17 | 2021-07-23 | 山东泰开电器机构有限公司 | Method, system, terminal and storage medium for detecting mechanical characteristics of high-voltage circuit breaker |
| CN113155421B (en) * | 2021-03-17 | 2022-07-15 | 山东泰开电器机构有限公司 | Method, system, terminal and storage medium for detecting mechanical characteristics of high-voltage circuit breaker |
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