CN108535617A - A kind of partial discharge positioning method and positioning system of switchgear - Google Patents
A kind of partial discharge positioning method and positioning system of switchgear Download PDFInfo
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- CN108535617A CN108535617A CN201810746321.4A CN201810746321A CN108535617A CN 108535617 A CN108535617 A CN 108535617A CN 201810746321 A CN201810746321 A CN 201810746321A CN 108535617 A CN108535617 A CN 108535617A
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- discharge
- discharge capacity
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- electric discharge
- positioning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1209—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using acoustic measurements
Abstract
The present invention provides a kind of partial discharge positioning method of switchgear and positioning systems.The partial discharge positioning method of the switchgear includes the following steps：Multiple sonacs of discharge capacity for monitoring point of discharge are arranged in same positioning plane, and the point of discharge is located in the positioning plane；The discharge capacity received according to each sonac calculates the arcing distance of point of discharge described in the corresponding sensor distance；Using each sonac as the center of circle, the arcing distance being calculated is radius, obtains the setting circle of each ultrasonic sensor；The spark location is obtained according to the intersecting area of the setting circle of multiple ultrasonic sensors.The beneficial effects of the invention are as follows：Plane positioning principle of the partial discharge positioning method of the switchgear based on multiple sonacs, can position that is convenient and efficient and being accurately located point of discharge.The present invention also provides a kind of shelf depreciation positioning systems of switchgear.
Description
Technical field
The invention belongs to Partial Discharge Detecting Technology fields, more particularly to a kind of shelf depreciation positioning side of switchgear
Method.
Background technology
During traditional switchgear troubleshooting, detection experiment is both for such as breaker, cable outlet, insulation mostly
Whether intact equal primary equipments or the problem of can intuitively find, must carry out power-off experiment again in this process.Because
As breaker ac voltage withstanding, whether the insulation experiment of resistance and directly observation outside have the experimental projects such as breakage, it is necessary to first
First power off.And the shortcoming of these methods is it is also obvious that be exactly the vacuum bubbles that these test most detection switch cabinet first, absolutely
Whether edge intensity is intact, and whether mutual inductor is sensitive etc., is secondly exactly the abrasion for inside switch cabinet, breakage etc. may only
External obvious part is checked, and many of inside switch cabinet is difficult to the corner observed and is often difficult to detect, and these
Corner is exactly likely that there are the accumulation of dust, burr, the loosening of the devices such as dirt and screw, if things go on like this, these parts
Similar short circuit occurs, the probability of the failures such as switch trip can be higher and higher, and more serious situation is discharged under failure, in turn
Cause the explosion of switchgear.Therefore, traditional monitoring method can no longer meet the power grid demand increasingly modernized, and use is more first
Into fault detection method be the best method solved the problems, such as.
The power-off maintenance for going out at present traditional, substantially has the discharge detection method of six kinds of mainstreams, they are ultrasonic wave respectively
Detection method (UT), chemical measure, flash spotting, pulse current method (ERA), radio frequency detection method, ultra high frequency PD detection
(UHF).In recent years, as the raising of acoustoelectric element sensitivity is plus the development of electronic signal amplifying technique, as non-contact inspection
The representative of survey, the advantage that ultrasonic Detection Method is possessed are more and more obvious, and have high sensitivity along with ultrasound examination
The advantages of, so relative to other detection methods, the development prospect of ultrasound examination is best.
Often it is difficult normal use, even not shadow if repaired not in time and troubleshooting after switchgear breaks down
The glitch that uses is rung, can also be accumulated into very important security risk over time, so needing the after failure generation
One time found location of fault, and solved failure as early as possible, to ensure the normal work of switchgear.Therefore it needs to switch
The shelf depreciation of cabinet is positioned, and in above-mentioned six kinds of detection methods, only ultrasound examination and ultra-high-frequency detection is by environment
Etc. ectocines it is relatively small, and for ultra-high-frequency detection method, have no idea to quantify well always partial discharge quantity be it most
Big disadvantage, so selecting ultrasonic Detection Method to carry out inside switch cabinet shelf depreciation Position Research.
Invention content
It is an object of the invention in view of the drawbacks of the prior art or problem, provide a kind of shelf depreciation positioning of switchgear
Method.
Technical scheme is as follows：A kind of partial discharge positioning method of switchgear includes the following steps：One, it will use
It is arranged in same positioning plane in multiple sonacs of the discharge capacity of monitoring point of discharge, and the point of discharge is positioned at described
It positions in plane；Two, the corresponding sensor distance is calculated according to the discharge capacity that each sonac receives
The arcing distance of the point of discharge；Three, using each sonac as the center of circle, the arcing distance being calculated is radius,
Obtain the setting circle of each ultrasonic sensor；Four, according to the intersection of the setting circle of multiple ultrasonic sensors
Domain obtains the spark location.
Preferably, in step 1, two-dimensional coordinate system is built in the positioning plane, and obtains each ultrasound and passes
The coordinate value of sensor.
Preferably, specifically comprise the following steps in step 2：The discharge capacity received according to the sonac
Numerical value judges the electric discharge type of point of discharge；Based on the electric discharge type that judgement obtains, select corresponding discharge capacity-arcing distance public
Formula carries out the calculating of arcing distance.
Preferably, the electric discharge type includes tip-point discharge, ball end-ball end electric discharge and tip-ball end electric discharge；Institute
Stating the discharge capacity in tip-point discharge type-arcing distance formula is：Wherein, x is arcing distance, y
For discharge capacity；Discharge capacity-arcing distance formula in the ball end-ball end electric discharge type is：Wherein, x is
Arcing distance, y are discharge capacity；Discharge capacity-arcing distance formula in the tip-ball end electric discharge type is：Wherein, x is arcing distance, and y is discharge capacity.
A kind of partial discharge of switchgear positioning system based on multiple sonacs includes：Multiple sonacs are used
In the discharge capacity of monitoring point of discharge；And control unit, it is used to receive the discharge capacity of multiple sonac detections；Its
In, multiple sonacs are arranged in same positioning plane, and the point of discharge is located in the positioning plane, institute
Control unit is stated to be calculated described in the corresponding sensor distance according to the discharge capacity that each sonac receives
The arcing distance of point of discharge, and described control unit is using each sonac as the center of circle, the arcing distance being calculated
For radius, the setting circle of each ultrasonic sensor is obtained, and finally according to the positioning of multiple ultrasonic sensors
Round intersecting area obtains the spark location.
Preferably, described control unit is during distance is put in calculating, and building two dimension in the positioning plane sits
Mark system, and obtain the coordinate value of each sonac.
Preferably, the numerical value for the discharge capacity that described control unit is received according to the sonac judges point of discharge
Electric discharge type, and the electric discharge type obtained based on judgement, select corresponding discharge capacity-arcing distance formula to carry out arcing distance
Calculating.
Preferably, the electric discharge type includes tip-point discharge, ball end-ball end electric discharge and tip-ball end electric discharge；Institute
Stating the discharge capacity in tip-point discharge type-arcing distance formula is：Wherein, x is arcing distance, y
For discharge capacity；Discharge capacity-arcing distance formula in the ball end-ball end electric discharge type is：Wherein, x is
Arcing distance, y are discharge capacity；Discharge capacity-arcing distance formula in the tip-ball end electric discharge type is：Wherein, x is arcing distance, and y is discharge capacity.
Technical solution provided by the invention has the advantages that：
The plane positioning principle of partial discharge positioning method and system based on multiple sonacs of the switchgear, can
With convenient and efficient and be accurately located the position of point of discharge；
Moreover, building plane positioning model by the way that multiple sonacs are carried out coordinatograph, not only calculating process is simple,
And there is higher precision；
The discharge capacity-that tip-point discharge, ball end-ball end electric discharge and tip-ball end electric discharge are obtained by many experiments is put
Electrical distance formula can be effectively reduced experimental error, to further improve positional accuracy.
Description of the drawings
Fig. 1 is the knot of the partial discharge of switchgear positioning system provided in an embodiment of the present invention based on multiple sonacs
Structure schematic diagram；
Fig. 2 be switchgear provided in an embodiment of the present invention partial discharge positioning method in using three sonacs
Position schematic diagram.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The description of specific distinct unless the context otherwise, the present invention in element and component, the shape that quantity both can be single
Formula exists, and form that can also be multiple exists, and the present invention is defined not to this.Although step in the present invention with label into
It has gone arrangement, but is not used to limit the precedence of step, unless expressly stated the order of step or holding for certain step
Based on row needs other steps, otherwise the relative rank of step is adjustable.It is appreciated that used herein
Term "and/or" one of is related to and covers associated Listed Items or one or more of any and all possible groups
It closes.
As shown in Figure 1, a kind of partial discharge of switchgear positioning system based on multiple sonacs 10, including it is multiple super
Sonic transducer 10 and control unit 20.Wherein, multiple sonacs 10 are used to monitor the discharge capacity of point of discharge 30, described
Control unit 20 is used to receive the discharge capacity that multiple sonacs 10 detect, and calculates each sonac 10
Arcing distance apart from the point of discharge 30.
For the sonac 10, multiple sonacs 10 are arranged in same positioning plane, and institute
Point of discharge 30 is stated to be located in the positioning plane.
For described control unit 20, described control unit 20 can be microcontroller or computer, and the present invention compares not
It limits.Described control unit 20 builds two-dimensional coordinate system during calculating arcing distance in the positioning plane, and
Obtain the coordinate value of each sonac 10.
Moreover, described control unit 20 is the center of circle with each sonac 10, the arcing distance being calculated is
Radius obtains the setting circle of each ultrasonic sensor, and finally according to the setting circle of multiple ultrasonic sensors
Intersecting area obtain 30 position of the point of discharge.
In fact, the numerical value that described control unit 20 also needs to the discharge capacity received according to the sonac 10 is sentenced
The electric discharge type of disconnected point of discharge 30, and the electric discharge type obtained based on judgement, select corresponding discharge capacity-arcing distance formula
Carry out the calculating of arcing distance.
In the present embodiment, the electric discharge type includes that tip-point discharge, ball end-ball end electric discharge and tip-ball end are put
Electricity.Such as：
Discharge capacity-arcing distance formula in the tip-point discharge type is：Wherein, x is
Arcing distance, y are discharge capacity；
Discharge capacity-arcing distance formula in the ball end-ball end electric discharge type is：Wherein, x is
Arcing distance, y are discharge capacity；
Discharge capacity-arcing distance formula in the tip-ball end electric discharge type is：Wherein, x is
Arcing distance, y are discharge capacity.
It should be noted that above-mentioned discharge capacity-arcing distance formula is to theoretical distance and intensity of acoustic wave formula：Further improvement, wherein r1, the distance between sensor and point of discharge, r are put for first2It is second
Put the distance between sensor and point of discharge.
It needs data acquisition through a large number of experiments and calculates, build the above-mentioned discharge capacity-for each electric discharge type and put
Electrical distance formula.
A kind of partial discharge of switchgear localization method based on multiple sonacs 10 includes the following steps：
One, multiple sonacs 10 of the discharge capacity for monitoring point of discharge 30 are arranged in same positioning plane,
And the point of discharge 30 is located in the positioning plane；
Two, the corresponding sensor distance institute is calculated according to the discharge capacity that each sonac 10 receives
State the arcing distance of point of discharge 30；
Three, it is the center of circle with each sonac 10, the arcing distance being calculated is radius, is obtained each described
The setting circle of ultrasonic sensor；
Four, 30 position of the point of discharge is obtained according to the intersecting area of the setting circle of multiple ultrasonic sensors.
Specifically, in step 1, two-dimensional coordinate system is built in the positioning plane, and obtains each ultrasound and passes
The coordinate value of sensor 10.
Moreover, specifically comprising the following steps in step 2：
The numerical value of the discharge capacity received according to the sonac 10 judges the electric discharge type of point of discharge 30；
Based on the electric discharge type that judgement obtains, corresponding discharge capacity-arcing distance formula is selected to carry out arcing distance
It calculates.
It should be noted that in the present embodiment, the electric discharge type includes tip-point discharge, ball end-ball end electric discharge
With tip-ball end electric discharge.Corresponding discharge capacity-arcing distance the formula of above-mentioned three kinds of electric discharge types is as follows：
Discharge capacity-arcing distance formula in the tip-point discharge type is：Wherein, x is
Arcing distance, y are discharge capacity；
Discharge capacity-arcing distance formula in the ball end-ball end electric discharge type is：Wherein, x is
Arcing distance, y are discharge capacity；
Discharge capacity-arcing distance formula in the tip-ball end electric discharge type is：Wherein, x is
Arcing distance, y are discharge capacity.
For example, next being illustrated to said program for using three sonacs.
As shown in Fig. 2, setting the coordinate of sensors A as (0,0), is arranged according to sensor plane, can obtain sensor B's
The coordinate (10,20) of coordinate (20,0) sensor C, assumes at this point that point of discharge in (x1, y1).At this point, connection point of discharge and sensing
Device A obtains a line segment, and using this line segment as radius, the coordinate of sensors A is that round obtain is made in the center of circle：
x2+y2=r1 2,
Wherein, r1For the radius of the circle, while the distance of namely required point of discharge range sensor A.
On the basis of sensors A, sensor B is observed, point of discharge and sensor B is connected at this time, obtains a line segment, with
This line segment is radius, and the coordinate of sensor B obtains for the center of circle：
(x-20)2+y2=r2 2,
At this point, the formula of simultaneous sensors A and sensor B, can obtain X1Numerical value and y1A range intervals, first
Preserve x1Numerical value.
On the basis of sensors A and sensor B, sensor C is observed, point of discharge and sensor C is connected at this time, obtains one
Line segment, using this line segment as radius, the coordinate of sensor C obtains for the center of circle：
(x-10)2+(y-20)2=r3 2,
It needs to judge there are two types of situation at this time：
If x1≤ 10, then
If x1>10, then
After obtaining three equation of a circles, carries out simultaneous two-by-two respectively, obtain：
40x=400+r1 2-r2 2,
The simultaneous equations of sensors A and sensor B：
20x-100+40y-400=r1 2-r3 2,
The simultaneous equations of sensors A and sensor C：
20x-40y+100=r2 2-r3 2,
Because of r1, r2, r3Numerical value can be obtained via data that sensor measures.
So bringing data into respectively can be obtained by three related x, the coordinates regional of y finds out three public domains, just
It is the region of discharge of wanted point of discharge, to finally realize positioning function.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (8)
1. a kind of partial discharge positioning method of switchgear, it is characterised in that：Include the following steps：
One, multiple sonacs of the discharge capacity for monitoring point of discharge are arranged in same positioning plane, and described put
Electricity point is located in the positioning plane；
Two, the discharge capacity received according to each sonac calculates to discharge described in the corresponding sensor distance
The arcing distance of point；
Three, using each sonac as the center of circle, the arcing distance being calculated is radius, obtains each ultrasonic wave
The setting circle of sensor；
Four, the spark location is obtained according to the intersecting area of the setting circle of multiple ultrasonic sensors.
2. a kind of partial discharge positioning method of switchgear according to claim 1, which is characterized in that in step 1,
Two-dimensional coordinate system is built in the positioning plane, and obtains the coordinate value of each sonac.
3. a kind of partial discharge positioning method of switchgear according to claim 1, which is characterized in that have in step 2
Body includes the following steps：
The numerical value of the discharge capacity received according to the sonac judges the electric discharge type of point of discharge；
Based on the electric discharge type that judgement obtains, corresponding discharge capacity-arcing distance formula is selected to carry out the calculating of arcing distance.
4. a kind of partial discharge positioning method of switchgear according to claim 3, which is characterized in that the electric discharge type
Including tip-point discharge, ball end-ball end electric discharge and tip-ball end electric discharge；
Discharge capacity-arcing distance formula in the tip-point discharge type is：Wherein, x be electric discharge away from
From y is discharge capacity；
Discharge capacity-arcing distance formula in the ball end-ball end electric discharge type is：Wherein, x be electric discharge away from
From y is discharge capacity；
Discharge capacity-arcing distance formula in the tip-ball end electric discharge type is：Wherein, x is electric discharge
Distance, y are discharge capacity.
5. a kind of partial discharge of switchgear positioning system based on multiple sonacs, which is characterized in that including：
Multiple sonacs, the discharge capacity for monitoring point of discharge；And
Control unit is used to receive the discharge capacity of multiple sonac detections；
Wherein, multiple sonacs are arranged in same positioning plane, and the point of discharge is located at the positioning and puts down
In face, discharge capacity that described control unit is received according to each sonac calculate the corresponding sensor away from
Arcing distance from the point of discharge, and described control unit, using each sonac as the center of circle, what is be calculated puts
Electrical distance is radius, obtains the setting circle of each ultrasonic sensor, and finally according to multiple ultrasonic sensors
The intersecting area of setting circle obtain the spark location.
6. a kind of partial discharge of switchgear positioning system based on multiple sonacs according to claim 5, special
Sign is that described control unit builds two-dimensional coordinate system, and obtain during calculating arcing distance in the positioning plane
To the coordinate value of each sonac.
7. a kind of partial discharge of switchgear positioning system based on multiple sonacs according to claim 5, special
Sign is that the numerical value for the discharge capacity that described control unit is received according to the sonac judges the electric discharge class of point of discharge
Type, and the electric discharge type obtained based on judgement, select corresponding discharge capacity-arcing distance formula to carry out the meter of arcing distance
It calculates.
8. a kind of partial discharge of switchgear positioning system based on multiple sonacs according to claim 7, special
Sign is that the electric discharge type includes tip-point discharge, ball end-ball end electric discharge and tip-ball end electric discharge；
Discharge capacity-arcing distance formula in the tip-point discharge type is：Wherein, x be electric discharge away from
From y is discharge capacity；
Discharge capacity-arcing distance formula in the ball end-ball end electric discharge type is：Wherein, x be electric discharge away from
From y is discharge capacity；
Discharge capacity-arcing distance formula in the tip-ball end electric discharge type is：Wherein, x is electric discharge
Distance, y are discharge capacity.
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| CN109212394A (en) * | 2018-10-30 | 2019-01-15 | 国网河南省电力公司南阳供电公司 | A kind of high-tension switch cabinet partial discharge monitoring system |
| CN109507548A (en) * | 2018-11-08 | 2019-03-22 | 国网浙江省电力有限公司金华供电公司 | 10kV route on-pole switch charges partial discharge test method |
| CN110703051A (en) * | 2019-10-15 | 2020-01-17 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Precise positioning method for fault point of GIL (Gate in L) voltage withstand test based on acoustic wave detection method |
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| CN110703051A (en) * | 2019-10-15 | 2020-01-17 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Precise positioning method for fault point of GIL (Gate in L) voltage withstand test based on acoustic wave detection method |
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| CN108535617B (en) | 2020-04-17 |
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Effective date of registration: 20230810 Address after: 350100 No. 2 Nanling Branch Road, phase II, Minhou economic and Technological Development Zone, sugarcane street, Minhou County, Fuzhou City, Fujian Province Patentee after: Fujian Rongyuan Electrical Equipment Co.,Ltd. Address before: 350108 No. 200 Xiyuan Gong Road, Minhou County, Fuzhou City, Fujian Province Patentee before: MINJIANG University |