CN102749564B - Detection simulation method for local discharge of switch cabinet - Google Patents
Detection simulation method for local discharge of switch cabinet Download PDFInfo
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- CN102749564B CN102749564B CN201210258835.8A CN201210258835A CN102749564B CN 102749564 B CN102749564 B CN 102749564B CN 201210258835 A CN201210258835 A CN 201210258835A CN 102749564 B CN102749564 B CN 102749564B
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Abstract
The invention provides a detection simulation method for local discharge of a switch cabinet. The method comprises the following steps: establishing a local discharge model according to typical data actually measured in detection and location of the local discharge of the switch cabinet; arranging a set of three-dimensional (3D) switch cabinet with local discharge points in a virtual switch cabinet field, wherein the local discharge points of the 3D switch cabinet correspond to the local discharge points of the local discharge model; setting test points on the 3D switch cabinet in response to a command input by a user; detecting the electromagnetic radiation intensities of the test points with the local discharge model; and regulating and monitoring the operating condition of the switch cabinet according to the electromagnetic radiation intensities. According to the technology disclosed by the invention, the local discharge model of the switch cabinet is simulated and used for detecting and simulating the preset test points, the simulation process is implemented by a computer without any physical equipment, and the method has the advantages of low simulation cost, low interference, high safety, high efficiency and very high popularization value.
Description
Technical field
The present invention relates to Simulating technique in Electric Power System, particularly relate to a kind of partial discharge of switchgear detection simulation method and system.
Background technology
Switch cubicle is the key equipment of electric system, large-scale customer substation reliable power supply.Statistics shows, the switch cubicle accident causing because of shelf depreciation defect has accounted for quite large ratio.Therefore, the monitoring of carrying out partial discharge of switchgear in electric system, large-scale user (as high ferro, subway, airport etc.) transformer station is extremely important, because switch cubicle equipment etc. is after the operation through certain hour, as reasons such as device aging, damages, its more operating parameters can change, and have potential faults, by the shelf depreciation of switch cubicle is carried out to detection simulation, can obtain the monitoring of its operating condition, can carry out failure prediction to switch cubicle, avoid the generation of accident.
At present, conventional partial discharge of switchgear detection simulation technology, it is generally the simulated environment of setting up based on physical equipment, although these technology can reach simulated effect true to nature, but need great cost owing to being equipped with various physical equipments, and in physical equipment emulation, need problem charged, that test under high voltage condition, disturb large, poor stability, efficiency low, make it be difficult to become ubiquity emulation technology and promote and come in the application of current power system, cannot meet the electrical network business demand of current development.
Summary of the invention
Based on this, be necessary high for the partial discharge of switchgear detection simulation technical costs based on physics, disturb large, poor stability, inefficient problem, a kind of partial discharge of switchgear detection simulation method is provided.
A partial discharge of switchgear detection simulation method, comprises the steps:
According to the typical data of the Partial Discharge Detection location actual measurement of switch cubicle, set up shelf depreciation model;
One group of three-dimensional switch cubicle that comprises shelf depreciation point is set in a virtual switch cubicle place, and wherein, the shelf depreciation point of described three-dimensional switch cubicle is corresponding with the shelf depreciation point of described shelf depreciation model;
Response user's input instruction arranges test point on described three-dimensional switch cubicle, and utilizes described shelf depreciation model to detect the electromagnetic radiation intensity of described test point;
According to described electromagnetic radiation intensity, adjusting the operating condition of described switch cubicle monitors.
Above-mentioned partial discharge of switchgear detection simulation method, virtual reality technology is detected and combined with partial discharge of switchgear, virtual switch cabinet shelf depreciation model, and utilize this partial discharge of switchgear model to carry out detection simulation to setting test point, simulation process completes by computing machine, without being equipped with physical equipment, the cost of emulation is low, it is little to disturb, security good, efficiency is high, has high promotional value.
Accompanying drawing explanation
Fig. 1 is the partial discharge of switchgear detection simulation method flow diagram of an embodiment.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of partial discharge of switchgear detection simulation method of the present invention is described in detail.
Fig. 1 shows the partial discharge of switchgear detection simulation method flow diagram of an embodiment, mainly comprises the steps:
Step 1: set up shelf depreciation model according to the typical data of the Partial Discharge Detection location actual measurement of switch cubicle;
In one embodiment, be directed to electromagnetic radiation and aerial propagation characteristic thereof that partial discharge of switchgear produces, the shelf depreciation model of virtual switch cabinet, mainly comprises the steps:
1) read in the typical data that partial discharge of switchgear detection and location detect, and set up electromagnetic radiation model according to described typical data; Wherein, described electromagnetic radiation model comprises the electromagnetic radiation of shelf depreciation point and the corresponding relation of distance;
As shown in table 1, table 1 is the measured data obtaining in 10kV partial discharge of switchgear detection and location experiment, the electromagnetic radiation intensity having produced while having described typical partial discharge of switchgear and propagation characteristic thereof, these data are carried out to Computer Simulation, obtain the electromagnetic radiation model as 10kV partial discharge of switchgear model.
Table 1:
| Distance (cm) | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | 60 |
| Field intensity (V/m) | 2.63 | 2.1 | 1.69 | 1.44 | 1.22 | 1.09 | 0.97 | 0.88 | 6×10 -8 |
2) calculate the fitting formula that in the space centered by described shelf depreciation point, electromagnetic radiation intensity distributes;
Preferably, in emulation, set up after electromagnetic radiation model, utilize differential technique to process measured data, simulate in the space centered by shelf depreciation point, the fitting formula between electromagnetic radiation intensity distribution and distance, specific as follows:
First, the typical data of definition measured data;
For example, the typical data of the measured data of 10kV partial discharge of switchgear detection and location in definition list 1, is expressed as measured data " distance; field strength " node, and is kept in a linear array, and first value of array is for [15,2.63], last is [60,6 * 10
-8].
Then, the node in linear array is carried out to linear interpolation calculating;
For example, according to the measured data in table 1, can obtain 9 nodes, according to the interpolation quantity of setting, the distance between every two nodes is carried out interpolation calculation, and then can obtain more " distances " and put corresponding " electromagnetic radiation intensity ".
Preferably, consider in the electromagnetic radiation intensity distribution of shelf depreciation point, electromagnetic radiation intensity changes little characteristic when shelf depreciation point is far or, mainly to the electromagnetic radiation intensity of local point of discharge with carrying out interpolation calculation in the larger distance range of change of distance.
Particularly, for obtained linear array by table 1, carry out interpolation calculation, comprise following process:
If D
ibe less than or equal to 15cm, think this infinite approach point of discharge, its radiation intensity V
iget the radiation intensity of first, get V
i=2.63;
If D
ibe more than or equal to 60cm, think that this point is far away apart from point of discharge, its radiation intensity V
iget the radiation intensity of last point, get V
i=6 * 10
-8;
If D
ibetween 15cm ~ 60cm, adopt linear interpolation method to calculate its electromagnetic radiation intensity, establish D
ibe greater than D
jformula is less than D
j+1, radiation intensity V
icomputing formula as follows:
In formula, D
jand D
j+12 points adjacent in linear array, V
jand V
j+1these 2 corresponding electromagnetic radiation intensities.
It should be noted that D
irefer to that check point is from the space length of shelf depreciation point, its computation process can be calculated by space coordinates.
Set a trap the volume coordinate position of portion's point of discharge for (X
0, Y
0, Z
0), in space, the coordinate of certain check point is (X
i, Y
i, Z
i), the space length D of this check point and shelf depreciation point
ifor:
Finally, according to linear interpolation, calculate, simulate in the space centered by shelf depreciation point, the fitting of distribution formula between electromagnetic radiation intensity distribution and distance;
Particularly, after interpolation calculation, can obtain the array of a plurality of " distance " point and " electromagnetic radiation intensity ", nodes all in array is carried out to matching, can obtain the matched curve with " electromagnetic radiation intensity " about " distance ", according to this matched curve, can calculate in the space centered by shelf depreciation point the fitting formula between electromagnetic radiation intensity distribution and distance.
3) according to described fitting formula, set up electromagnetic radiation intensity test procedure; This electromagnetic radiation intensity test procedure, can be used for carrying out emulation testing.
Step 2: one group of three-dimensional switch cubicle that comprises shelf depreciation point is set in a virtual switch cubicle place, and wherein, the shelf depreciation point of described three-dimensional switch cubicle is corresponding with the shelf depreciation point of described shelf depreciation model;
In one embodiment, three-dimensional switch cubicle being set comprises the steps:
First, adopt virtual reality technology, set up a virtual switch cubicle place; Particularly, adopt 3DMAX business software, according to the fabricating yard of actual switch cabinet, set up a virtual switch cubicle place.
Then, on described switch cubicle place, adopt virtual reality technology that one group of three-dimensional switch cubicle is set; Adopt 3DMAX business software to set up three-dimensional switch cubicle according to the proportionate relationship of the length of actual switch cubicle.
The 3rd, shelf depreciation point is set on described three-dimensional switch cubicle; Particularly, on three-dimensional switch cubicle, select a point as shelf depreciation point, form the corresponding relation between this shelf depreciation point and the shelf depreciation point of shelf depreciation model, confirm its coordinate.
Step 3: response user's input instruction arranges test point on described three-dimensional switch cubicle;
Particularly, to user, by input instructions such as mouses, on three-dimensional switch, a point is set to test point, and determines its coordinate.
Step 4: describedly utilize described shelf depreciation model to detect the electromagnetic radiation intensity of described test point;
Particularly, computation process comprises the steps:
First, calculate the distance between described test point and the shelf depreciation point of described three-dimensional switch cubicle; By the coordinate of above-mentioned definite test point, and the coordinate of shelf depreciation point, the distance between test point and the shelf depreciation point of three-dimensional switch cubicle can be calculated;
For example, according to formula (2), the test point in the 10kV virtual switch cabinet of can calculating detector surveying is from the distance D of the shelf depreciation point setting
i.
Then, by the described electromagnetic radiation intensity that calculates described test point apart from the fitting formula in electromagnetic radiation intensity test procedure described in substitution;
Particularly, after calculating distance, by the distance value input electromagnetic radiation intensity test procedure obtaining, utilize fitting formula to carry out electromagnetic radiation intensity calculating;
For example,, by D
ibe updated to the fitting of distribution formula between electromagnetic radiation intensity distribution and distance, can calculate this distance and obtain corresponding electromagnetic radiation intensity V
i; Further, described electromagnetic radiation intensity can also be presented in the region of a setting.
Step 5: the operating condition of adjusting described switch cubicle according to described electromagnetic radiation intensity is monitored;
For example, calculated value under the electromagnetic radiation intensity obtaining according to emulation and equipment normal operation contrasts, the operational factor error of compute switch cabinet, adjusts the running parameter of described switch cubicle according to this parameter error, and it is operated in normal condition.
By emulation, can also obtain its parameter changing condition, for example, can emulation its operate in the working condition under some defect condition, thereby can carry out the failure prediction under special defect, the adjustment of carrying out running parameter for switch cubicle provides important references, avoid accident to occur, and these are difficult to realize at real physical equipment.
In sum, partial discharge of switchgear detection simulation method of the present invention can be truly, realistically emulation partial discharge of switchgear testing process, based on computer software, realize, avoided needing in physical equipment emulation problem charged, that test under high voltage condition, disturb little, security good, efficiency is high, for the partial discharges fault prediction of switch cubicle, provides important method support; In addition, can also be applied in the normalized operation of electric system, partial discharge of switchgear detection simulation experimental safe training education aspect particularly, can bring better beneficial effect, for example, adopt this method to contribute to especially to realize telecommunication network training, thereby realize, disperse training, concentrated examination.It is an effective ingredient of power system operation emulation.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (2)
1. a partial discharge of switchgear detection simulation method, is characterized in that, comprises the following steps:
According to the typical data of the Partial Discharge Detection location actual measurement of switch cubicle, set up shelf depreciation model; Specifically comprise: read in the typical data that partial discharge of switchgear detection and location detect, and set up electromagnetic radiation model according to described typical data; Wherein, described electromagnetic radiation model comprises the electromagnetic radiation of shelf depreciation point and the corresponding relation of distance, and described distance is with respect to the distance of shelf depreciation point in electromagnetic radiation direction; The fitting formula that in the space of calculating centered by described shelf depreciation point, electromagnetic radiation intensity distributes; According to described fitting formula, set up electromagnetic radiation intensity test procedure;
One group of three-dimensional switch cubicle that comprises shelf depreciation point is set in a virtual switch cubicle place, and wherein, the shelf depreciation point of described three-dimensional switch cubicle is corresponding with the shelf depreciation point of described shelf depreciation model;
Response user's input instruction arranges test point on described three-dimensional switch cubicle;
Utilize described shelf depreciation model to detect the electromagnetic radiation intensity of described test point; Specifically comprise: calculate the distance between described test point and the shelf depreciation point of described three-dimensional switch cubicle; By the described electromagnetic radiation intensity that calculates described test point apart from the fitting formula in electromagnetic radiation intensity test procedure described in substitution;
According to described electromagnetic radiation intensity, adjusting the operating condition of described switch cubicle monitors.
2. partial discharge of switchgear detection simulation method according to claim 1, is characterized in that, describedly one group of three-dimensional switch cubicle step that comprises shelf depreciation point is set in a virtual switch cubicle place specifically comprises:
Adopt virtual reality technology, set up a virtual switch cubicle place;
On described switch cubicle place, adopt virtual reality technology that one group of three-dimensional switch cubicle is set;
Shelf depreciation point is set on described three-dimensional switch cubicle.
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| CN103353847A (en) * | 2012-12-24 | 2013-10-16 | 国家电网公司 | Simulation device for electrical equipment discharge detection based on virtual realization and realization method thereof |
| CN103323750B (en) * | 2013-05-30 | 2016-06-01 | 国家电网公司 | For the different sound inspection method of high pressure seal switching cabinet or sealing bus bar and inspection units |
| CN103969562A (en) * | 2014-05-29 | 2014-08-06 | 广州供电局有限公司 | Simulated partial discharge detection device for switch cabinet |
| CN107607813A (en) * | 2017-09-11 | 2018-01-19 | 厦门理工学院 | A kind of switch cubicle model combination property is shown and control system and its construction method |
| CN108414900A (en) * | 2018-03-08 | 2018-08-17 | 云南电网有限责任公司电力科学研究院 | A kind of method and system of detection partial discharge of transformer |
| CN108802577A (en) * | 2018-04-19 | 2018-11-13 | 沈阳工程学院 | A kind of switch cabinet partial discharge measurement and positioning method |
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Effective date of registration: 20200916 Address after: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee after: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd. Address before: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee before: GUANGZHOU POWER SUPPLY Co.,Ltd. |
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