CN104166773A - Method for measuring relation between stroke of circuit breaker contact and rotation angle of main shaft - Google Patents
Method for measuring relation between stroke of circuit breaker contact and rotation angle of main shaft Download PDFInfo
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- CN104166773A CN104166773A CN201410425025.6A CN201410425025A CN104166773A CN 104166773 A CN104166773 A CN 104166773A CN 201410425025 A CN201410425025 A CN 201410425025A CN 104166773 A CN104166773 A CN 104166773A
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- rotation angle
- relation
- main shaft
- contact
- circuit breaker
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- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The invention discloses a method for measuring the relation between the stroke of a circuit breaker contact and the rotation angle of a main shaft. The method comprises the steps that a circuit breaker installation drawing is converted into a computer-assisted design drawing, the mechanical relation between the circuit breaker contact and the main shaft is calculated, the relation graph between the contact and the rotation angle of the main shaft is drawn through the computer-aided design function and used for measuring the corresponding relation between the displacement of the contact and the rotation angle of the main shaft, the relation graph, drawn through the computer-aided design function, between the contact and the rotation angle of the main shaft is used for calculating and fitting multinomial coefficients. The relation between the stroke of the circuit breaker contact and the rotation angle of the main shaft can be obtained, so that work efficiency is improved greatly, and accuracy and stability of the relation between the stroke of the circuit breaker contact and the rotation angle of the main shaft are improved.
Description
Technical field
The present invention relates to a kind of method of measuring contact of breaker stroke and Spindle rotation angle degree relation, provide convenience for detecting contact of breaker stroke.
Background technology
Vacuum circuit breaker due to good insulation preformance, volume is little, the life-span is high, the advantage such as easy to maintenance, is deeply subject to the welcome of power consumer.Therefore its functional reliability is of great significance the safe operation tool of electric system.
Vacuum circuit breaker relies on the correct operation of mechanical part to complete its function, so each parts are very important.DianKeYuan all shows the statistical study of high-voltage switch gear accident, 80% of vacuum circuit breaker fault is investigation and the statistics of the vacuum circuit breaker that national drug in some provinces power supply department put into operation in 1 year according to Jiangsu Province's electric power experiment al research institute of mechanical reason, the known reason that causes vacuum circuit breaker mechanical fault has operating mechanism and drive disk assembly fault, as divide-shut brake coil burnout, wire loop loose contact, web member fracture, bite, wearing and tearing, displacement and distortion, pivot pin comes off, and threads off malfunctioning etc.
The content of vacuum circuit breaker on-line monitoring has had a lot of introductions both at home and abroad at present.Wherein, the method one of known measurement contact of breaker stroke and Spindle rotation angle degree relation is computing method, be to find the trigonometric function of contact of breaker stroke and Spindle rotation angle degree to carry out approximate simulation, but error is large in the method practicality, substantially can not correctly reflect the ruuning situation of contact of breaker;
Method two is to be combined with Spindle rotation angle degree with linear displacement transducer, obtain contact of breaker stroke and Spindle rotation angle degree relation through a large amount of actual measurements, the method precision is high, can meet the error requirements of measurement, its defect is in installation, all will carry out a large amount of tests by every isolating switch, increases labour intensity and work on the spot time.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method of measuring contact of breaker stroke and Spindle rotation angle degree relation, utilize Computer Simulation to obtain the analytical expression between spindle angular displacement and moving contact straight-line displacement, and in actual applications error range in acceptable 3%; The method is easy to realize, and for vacuum breaker mechanical features on-line monitoring provides an effective solution, conveniently obtains contact of breaker stroke and Spindle rotation angle degree relation.
For achieving the above object, technical scheme of the present invention is as follows:
A method of measuring contact of breaker stroke and Spindle rotation angle degree relation, comprising:
Step 1, breaker mechanism installation diagram is converted into computer-aided design (CAD) figure;
In step 2, computer-aided design (CAD) figure in step 1, draw out the graph of a relation of circuit breaker operation mechanism and main shaft;
Step 3, circuit breaker operation mechanism based in step 2 and the graph of a relation of main shaft, further simulate the corresponding data of n group Spindle rotation angle degree ɑ and contact travel Y;
The relation of step 4, wherein Spindle rotation angle degree and contact travel can be regarded n rank polynomial expression as:
Y (α)=c
nα
n+ c
n-1α
n-1+ ... + c
1α+c, by the n group Spindle rotation angle degree ɑ of emulation in step 3 and the corresponding data substitution said n rank polynomial expression of contact travel Y, draws polynomial coefficient c
n, c
n-1c
1, c;
Step 5, by the polynomial coefficient substitution n rank polynomial expression in step 4, draw the relational expression of spindle angular displacement and moving contact straight-line displacement.
In a preferred embodiment of the invention, described computer-aided design (CAD) figure is CAD figure.
By technique scheme, the invention has the beneficial effects as follows:
The present invention utilizes Computer Simulation to obtain the analytical expression between spindle angular displacement and moving contact straight-line displacement, and in actual applications error range in acceptable 3%;
The method is easy to realize, and for vacuum breaker mechanical features on-line monitoring provides an effective solution, conveniently obtains contact of breaker stroke and Spindle rotation angle degree relation;
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of vacuum circuit breaker of the present invention.
Fig. 2 is the schematic diagram that breaker mechanism installation diagram of the present invention is converted into computer-aided design (CAD) figure.
Fig. 3 is the graph of a relation of circuit breaker operation mechanism of the present invention and main shaft.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
A method of measuring contact of breaker stroke and Spindle rotation angle degree relation, comprising:
Step 1, breaker mechanism installation diagram is converted into computer-aided design (CAD) figure;
In step 2, computer-aided design (CAD) figure in step 1, draw out the graph of a relation of circuit breaker operation mechanism and main shaft;
Step 3, circuit breaker operation mechanism based in step 2 and the graph of a relation of main shaft, further simulate the corresponding data of n group Spindle rotation angle degree ɑ and contact travel Y;
The relation of step 4, wherein Spindle rotation angle degree and contact travel can be regarded n rank polynomial expression as:
Y (α)=c
nα
n+ c
n-1α
n-1+ ... + c
1α+c, by the n group Spindle rotation angle degree ɑ of emulation in step 3 and the corresponding data substitution said n rank polynomial expression of contact travel Y, draws polynomial coefficient c
n, c
n-1c
1, c;
Step 5, by the polynomial coefficient substitution n rank polynomial expression in step 4, draw the relational expression of spindle angular displacement and moving contact straight-line displacement.
Describe in detail as follows to aforesaid operations step:
With reference to Fig. 1; for the structural representation of vacuum circuit breaker; when switch operating mechanism is normal; protective relaying device can normally divide combination switch; when the relevant abnormalities such as the performance of the recovery of medium after arc-chutes performance, arc time and arc appear in the operating mechanism of switch, on/off switch spring and fault; can not be found in time, this brings hidden danger to expansion and the safe operation of fault.
With reference to Fig. 2, it is the graph of a relation of circuit breaker operation mechanism and main shaft.Wherein vacuum circuit breaker comprises a main shaft 100, the connecting rod 200 being connected with main shaft 100, with the insulation column 300 that connecting rod 200 is coupling, with the connecting lever assembly that insulation column 300 is coupling, described connecting lever assembly comprises interconnective the first connecting lever 400 and the second connecting lever 500.
With reference to Fig. 3, it is the graph of a relation of circuit breaker operation mechanism and main shaft.Wherein the length of connecting rod 200 is L3, and insulation column 300 is L4, and the first connecting lever 40 is L2, and the second connecting lever 500 is L1.
Straight-line displacement Y is not only relevant with ɑ as we know from the figure, also relevant with the size of connecting rod, insulation column, connecting lever; With γ angle, β angle is relevant, and for the γ angle of intermediate link, the corresponding relation at β angle wouldn't process.We will obtain Y, will find the closest relation of Y and ɑ.
Wherein the relation of Spindle rotation angle degree and contact travel can be regarded n rank polynomial expression: Y (α)=c as
nα
n+ c
n-1α
n-1+ ... + c
1α+c further simulates the corresponding data of n group Spindle rotation angle degree ɑ and contact travel Y in computer-aided design (CAD) figure,
By above-mentioned data substitution Y (α)=c
nα
n+ c
n-1α
n-1+ ... + c
1α+c, obtains polynomial coefficient c
n, c
n-1c
1, c; The expression that these coefficients are approximate the mechanical data of isolating switch.
Further polynomial coefficient inverse iteration is entered in the polynomial expression of n rank, thereby draw the relational expression of spindle angular displacement and moving contact straight-line displacement.Coefficient is stored in the software of monitoring system for calculating.
Embodiments of the invention select ZN28-12 vacuum circuit breaker to be further described, and determine the spindle angular displacement of vacuum circuit breaker and the relation of moving contact straight-line displacement of this model: ɑ=3 °, Y=1.6mm according to said method; ɑ=12 °, Y=5.9mm; ɑ=21 °, Y=9.8mm.Thereby draw: Y=-0.00247 α
2+ 0.5148 α+0.07808.
Computer Simulation is obtained contact travel 11mm time, 24.16 ° of ɑ angle rotations.Bring above-mentioned relation formula into and draw Y=11.07mm.Relative error is: 0.6%, and this error is in 3%.This result can be used in on-line monitoring system.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and instructions, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (2)
1. a method of measuring contact of breaker stroke and Spindle rotation angle degree relation, is characterized in that, comprising:
Step 1, breaker mechanism installation diagram is converted into computer-aided design (CAD) figure;
In step 2, computer-aided design (CAD) figure in step 1, draw out the graph of a relation of circuit breaker operation mechanism and main shaft;
Step 3, circuit breaker operation mechanism based in step 2 and the graph of a relation of main shaft, further simulate the corresponding data of n group Spindle rotation angle degree ɑ and contact travel Y;
The relation of step 4, wherein Spindle rotation angle degree and contact travel can be regarded n rank polynomial expression as:
, by the n group Spindle rotation angle degree ɑ of emulation in step 3 and the corresponding data substitution said n rank polynomial expression of contact travel Y, draw polynomial coefficient
;
Step 5, by the polynomial coefficient substitution n rank polynomial expression in step 4, draw the relational expression of spindle angular displacement and moving contact straight-line displacement.
2. a kind of method of measuring contact of breaker stroke and Spindle rotation angle degree relation according to claim 1, is characterized in that, described computer-aided design (CAD) figure is CAD figure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410425025.6A CN104166773A (en) | 2014-08-26 | 2014-08-26 | Method for measuring relation between stroke of circuit breaker contact and rotation angle of main shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410425025.6A CN104166773A (en) | 2014-08-26 | 2014-08-26 | Method for measuring relation between stroke of circuit breaker contact and rotation angle of main shaft |
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| Publication Number | Publication Date |
|---|---|
| CN104166773A true CN104166773A (en) | 2014-11-26 |
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ID=51910585
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410425025.6A Pending CN104166773A (en) | 2014-08-26 | 2014-08-26 | Method for measuring relation between stroke of circuit breaker contact and rotation angle of main shaft |
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|---|---|
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043229A (en) * | 2015-05-07 | 2015-11-11 | 西安交通大学 | Device and method for measuring arc contact contacting travel of high-voltage SF6 circuit breaker |
| CN107064786A (en) * | 2016-12-29 | 2017-08-18 | 西安工程大学 | A kind of 10kV breakers spring monitoring method |
| CN107421731A (en) * | 2017-09-04 | 2017-12-01 | 厦门斯玛特思智能电气股份有限公司 | Breaker mechanic property sensor based on six-axle acceleration and gyroscope |
| CN111722103A (en) * | 2020-06-08 | 2020-09-29 | 国网辽宁省电力有限公司电力科学研究院 | Method for calculating speed and stroke of 252kV GIS isolating switch |
| 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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| CN2879397Y (en) * | 2006-03-04 | 2007-03-14 | 吉林龙鼎电气股份有限公司 | Vacuum breaker with contact abrasion thickness detecting device |
| US20090071809A1 (en) * | 2007-09-17 | 2009-03-19 | Areva T&D Sa | Combined circuit breaker and disconnector for an alternator with actuation by an assembly of a main shaft and secondaries shafts |
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2014
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Patent Citations (2)
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| CN2879397Y (en) * | 2006-03-04 | 2007-03-14 | 吉林龙鼎电气股份有限公司 | Vacuum breaker with contact abrasion thickness detecting device |
| US20090071809A1 (en) * | 2007-09-17 | 2009-03-19 | Areva T&D Sa | Combined circuit breaker and disconnector for an alternator with actuation by an assembly of a main shaft and secondaries shafts |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043229A (en) * | 2015-05-07 | 2015-11-11 | 西安交通大学 | Device and method for measuring arc contact contacting travel of high-voltage SF6 circuit breaker |
| CN107064786A (en) * | 2016-12-29 | 2017-08-18 | 西安工程大学 | A kind of 10kV breakers spring monitoring method |
| CN107421731A (en) * | 2017-09-04 | 2017-12-01 | 厦门斯玛特思智能电气股份有限公司 | Breaker mechanic property sensor based on six-axle acceleration and gyroscope |
| CN111722103A (en) * | 2020-06-08 | 2020-09-29 | 国网辽宁省电力有限公司电力科学研究院 | Method for calculating speed and stroke of 252kV GIS isolating switch |
| 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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Application publication date: 20141126 |
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