CN105931245A - Composite insulator surface electric field calculating method - Google Patents
Composite insulator surface electric field calculating method Download PDFInfo
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- CN105931245A CN105931245A CN201610288235.4A CN201610288235A CN105931245A CN 105931245 A CN105931245 A CN 105931245A CN 201610288235 A CN201610288235 A CN 201610288235A CN 105931245 A CN105931245 A CN 105931245A
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- insulator
- composite insulator
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- image
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0004—Industrial image inspection
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10004—Still image; Photographic image
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30108—Industrial image inspection
- G06T2207/30164—Workpiece; Machine component
Abstract
The invention discloses a composite insulator surface electric field calculating method. A droplet-covered insulator surface image is obtained through a photograph device, circuit equivalent is performed on one M*N area S and residual resistance R of a composite insulator silicone rubber umbrella skirt, binarization is performed on a hydrophobic image by use of an image processing technology, in an M*N-sized image, a unit with a pixel of 1 is an insulator drying unit, a unit with a pixel of 0 is an insulator humid unit, an admittance matrix with a size of (M*N)<2> is formed by applying unit resistance and capacitance parallel equivalence to each pixel unit, and electrical network analysis can be performed on the M*N area S by use of a node voltage method. The method for constructing a surface electric field model is relatively simple, accords with an actual droplet distribution condition, and has great guidance significance on anti-pollution flashover work of a composite insulator.
Description
Technical field
The present invention relates to a kind of surface of composite insulator electric Field Calculation method, belong to technical field of high voltage.
Background technology
Since twentieth century 90 years, process of industrialization is accelerated to cause China's atmospheric pollution day by day serious, northeastward,
The areas such as northwest, North China, Central China, East China, south China, it is glass, porcelain that bulk zone pollution flashover accident, main cause the most all occurred
The anti-pollution characteristic of insulant own is poor caused, even if taking correspondingly anti-pollution measure such as periodically cleaning, the design of antifouling full skirt, increasing
Big creep age distance etc. the most all can not effectively prevent the generation of insulator contamination accident.Different from traditional glass, porcelain insulator, compound
Insulator silicon rubber material has good hydrophobicity and hydrophobicity migrates characteristic, and in terms of anti-fouling flashover performance, advantage is the most aobvious
Writing, at present in power system, composite insulator becomes one of solution external insulation pollution flashover problem way best, maximally effective.
Along with prolongation and the impact of each side environmental factors of the time of operation, Hydrophobicity of Composite Insulator can change,
Thus causing correspondingly anti-fouling flashover performance to change therewith, its flashover fault increases the most accordingly, for finding composite insulator event in time
Hinder hidden danger, avoid burst accident, guarantee power grid security reliability service, it is necessary to can be special with resistance to pollution flashover to Hydrophobicity of Composite Insulator
Property dependency carry out computational analysis, for power supply department composite insulator operation maintenance and transformation provide instruct.
Summary of the invention
It is an object of the invention to, in order to solve the problem that Hydrophobicity of Composite Insulator exists, the present invention proposes a kind of compound
Insulator surface electric Field Calculation method.
The technical scheme is that, a kind of surface of composite insulator electric Field Calculation method, described method is set by photograph
Standby acquisition is covered with globule insulator surface image, a piece to composite insulator silicon rubber full skirtRegion S and residual resistance
R carries out circuit equivalent, and hydrophobicity image is carried out binaryzation by application image treatment technology,In sized images, pixel is
The unit of 1 is insulator drying unit, pixel be Unit 0 be that insulator moistens unit, then single to the application of each pixel cell
Position resistance is in parallel with electric capacity of equal value, and forming size isAdmittance matrix, use node-pair method just can be rightDistrict
Territory S carries out Electrical network analysis.
The step of a kind of surface of composite insulator electric Field Calculation method is:
(1) compound inslation subsample is sprayed water, utilize camera installation that the surface of composite insulator being covered with the globule is taken pictures；
(2) Hydrophobicity of Composite Insulator grade is determined；
(3) a piece to composite insulator silicon rubber full skirtRegion S and residual resistance R carries out circuit equivalent；
(4) hydrophobicity image is carried out binaryzation by application image treatment technology,In sized images, pixel is the unit of 1
For insulator drying unit, comprise silicone rubber, filth, pixel be Unit 0 be that insulator moistens unit, comprise silicone rubber, filth,
The globule；
(5) in parallel with electric capacity of equal value to each pixel cell application unit resistance, forming size isAdmittance matrix；
(6) employing node-pair method just can be rightRegion S carries out Electrical network analysis.
The invention has the beneficial effects as follows, the inventive method can calculate different hydrophobicity rank surface of composite insulator electric field and divide
Cloth situation, thus grasp the dependency between Hydrophobicity of Composite Insulator energy and resistance to Flashover Characteristics.The electromagnetism such as existing ANYSIS
Software is underaction in terms of building model, is only limited to relatively simple model, water actual for surface of composite insulator
The model construction of pearl distribution is extremely difficult, and this method makes full use of the advantage of image processing techniques, by actual composite insulator
The binary map of hydrophobicity image water mark distribution combines with electric network method, has successfully built composite insulator electrical network model.
The surface of composite insulator Electric Field Distribution situation of different hydrophobicity rank can be obtained.The inventive method obtains compound inslation sublist
Face analysis of electric field situation, is consistent with practical situation, and the work of composite insulator antifouling work is had important directive significance.
Accompanying drawing explanation
Fig. 1 is one surface of composite insulator electric Field Calculation method step block diagram of the present invention；
Fig. 2 composite insulator electrical network model figure；
Fig. 2 (1) is moistening composite insulator；
Fig. 2 (2) is moistening composite insulator equivalent model；
Fig. 3 is pixel equivalent unit；
Fig. 3 (1) is the pixel equivalent unit of moistening unit；
Fig. 3 (2) is the pixel equivalent unit of drying unit；
Wherein, 1 is pollution layer；2 is insulator surface；3 is water mark；
Fig. 4 is HC1-HC7 grade surface of composite insulator image；
Fig. 5 is bianry image after the segmentation of HC1-HC7 grade surface of composite insulator image；
Fig. 6 be hydrophobicity rank be surface of composite insulator Electric Field Distribution situation in the case of HC1-HC7 level.
Detailed description of the invention
As it is shown in figure 1, the detailed description of the invention of surface of composite insulator electric Field Calculation is as follows:
(1) compound inslation subsample is sprayed water, utilize camera installation that the surface of composite insulator being covered with the globule is taken pictures.
(2) determining Hydrophobicity of Composite Insulator grade, as shown in Figure 4, Hydrophobicity of Composite Insulator grade is divided into seven grades, from
HC1 to HC7.
(3) a piece to composite insulator silicon rubber full skirtRegion S and residual resistance R carries out circuit equivalent, such as figure
Shown in 2, Fig. 2 (1) is moistening composite insulator, and Fig. 2 (2) is moistening composite insulator equivalent model.
(4) hydrophobicity image is carried out binaryzation by application image treatment technology,In sized images, pixel is 1
Unit is insulator drying unit, comprises silicone rubber, filth, pixel be Unit 0 be that insulator moistens unit, comprise silicone rubber,
Filthy, the globule, such as Fig. 3, shown in 5；Fig. 3 (1) is the pixel equivalent unit of moistening unit；Fig. 3 (2) is the pixel etc. of drying unit
Effect unit；Fig. 5 is bianry image after the segmentation of HC1-HC7 grade surface of composite insulator image.
(5) in parallel with electric capacity of equal value to each pixel cell application unit resistance, forming size isAdmittance square
Battle array.
(6) employing node-pair method just can be rightRegion S carries out analysis of electric field, is illustrated in figure 6 hydrophobicity rank
For surface of composite insulator Electric Field Distribution situation in the case of HC1-HC7 level.
Claims (2)
1. a surface of composite insulator electric Field Calculation method, it is characterised in that described method is obtained by camera installation and is covered with
Globule insulator surface image, a piece to composite insulator silicon rubber full skirtRegion S and residual resistance R carries out circuit
Equivalence, hydrophobicity image is carried out binaryzation by application image treatment technology,In sized images, pixel is that the unit of 1 is
Insulator drying unit, pixel be Unit 0 be that insulator moistens unit, then to each pixel cell application unit resistance with electricity
Holding in parallel of equal value, forming size isAdmittance matrix, use node-pair method just can be rightRegion S carries out electricity
Analysis of network.
A kind of surface of composite insulator electric Field Calculation method, it is characterised in that the step of described method
Rapid as follows:
(1) compound inslation subsample is sprayed water, utilize camera installation that the surface of composite insulator being covered with the globule is taken pictures；
(2) Hydrophobicity of Composite Insulator grade is determined；
(3) a piece to composite insulator silicon rubber full skirtRegion S and residual resistance R carries out circuit equivalent；
(4) hydrophobicity image is carried out binaryzation by application image treatment technology,In sized images, pixel is the unit of 1
For insulator drying unit, comprise silicone rubber, filth, pixel be Unit 0 be that insulator moistens unit, comprise silicone rubber, filth,
The globule；
(5) in parallel with electric capacity of equal value to each pixel cell application unit resistance, forming size isAdmittance matrix；
(6) employing node-pair method just can be rightRegion S carries out Electrical network analysis.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610288235.4A CN105931245A (en) | 2016-05-05 | 2016-05-05 | Composite insulator surface electric field calculating method |
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| CN201610288235.4A CN105931245A (en) | 2016-05-05 | 2016-05-05 | Composite insulator surface electric field calculating method |
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| CN201610288235.4A Pending CN105931245A (en) | 2016-05-05 | 2016-05-05 | Composite insulator surface electric field calculating method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110954793A (en) * | 2019-12-10 | 2020-04-03 | 西安交通大学 | Composite insulator umbrella skirt aging detection method and detection device based on spectral imaging |
| CN112884720A (en) * | 2021-02-01 | 2021-06-01 | 广东电网有限责任公司广州供电局 | Distribution line pollution flashover insulator detection method and system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102694358A (en) * | 2012-06-07 | 2012-09-26 | 甘肃省电力公司电力科学研究院 | Method for improving potential distribution of insulators in transmission line in filthy and wet environment |
| US20150206024A1 (en) * | 2014-01-22 | 2015-07-23 | Canon Kabushiki Kaisha | Image processing apparatus, image processing method, and storage medium |
| CN105300844A (en) * | 2015-12-03 | 2016-02-03 | 国家电网公司 | Hydrophobicity grade judging method of silicone rubber insulator |
| CN105303006A (en) * | 2015-12-03 | 2016-02-03 | 国家电网公司 | Method for calculating electric field of composite insulator with contaminated thin layer |
-
2016
- 2016-05-05 CN CN201610288235.4A patent/CN105931245A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102694358A (en) * | 2012-06-07 | 2012-09-26 | 甘肃省电力公司电力科学研究院 | Method for improving potential distribution of insulators in transmission line in filthy and wet environment |
| US20150206024A1 (en) * | 2014-01-22 | 2015-07-23 | Canon Kabushiki Kaisha | Image processing apparatus, image processing method, and storage medium |
| CN105300844A (en) * | 2015-12-03 | 2016-02-03 | 国家电网公司 | Hydrophobicity grade judging method of silicone rubber insulator |
| CN105303006A (en) * | 2015-12-03 | 2016-02-03 | 国家电网公司 | Method for calculating electric field of composite insulator with contaminated thin layer |
Non-Patent Citations (1)
| Title |
|---|
| 石岩: "基于泄漏电流特征量的绝缘子污闪预测模型及方法研究", 《中国博士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110954793A (en) * | 2019-12-10 | 2020-04-03 | 西安交通大学 | Composite insulator umbrella skirt aging detection method and detection device based on spectral imaging |
| CN110954793B (en) * | 2019-12-10 | 2021-06-01 | 西安交通大学 | Composite insulator umbrella skirt aging detection method and detection device based on spectral imaging |
| CN112884720A (en) * | 2021-02-01 | 2021-06-01 | 广东电网有限责任公司广州供电局 | Distribution line pollution flashover insulator detection method and system |
| CN112884720B (en) * | 2021-02-01 | 2023-08-11 | 广东电网有限责任公司广州供电局 | Distribution line pollution flashover insulator detection method and system |
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Application publication date: 20160907 |