CN107543821A - A kind of insulator algal grown degree assessment method - Google Patents
A kind of insulator algal grown degree assessment method Download PDFInfo
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- CN107543821A CN107543821A CN201710800322.8A CN201710800322A CN107543821A CN 107543821 A CN107543821 A CN 107543821A CN 201710800322 A CN201710800322 A CN 201710800322A CN 107543821 A CN107543821 A CN 107543821A
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Abstract
The invention discloses a kind of insulator algal grown degree assessment method, methods described includes：Step 1：Obtain insulator surface algae density ρ and algae and climb electric direction covering creepage distance of insulation ratio D in insulator；Step 2：The algae density and distance proportion obtained based on step 1, algal grown degree is assessed, obtains assessment result, solves existing algal grown degree assessment method missing problem, realize and insulator algal grown degree is rationally assessed, ensure the technique effect of power equipment safety.
Description
Technical field
The present invention relates to field of power, in particular it relates to a kind of insulator algal grown degree assessment method.
Background technology
Power system external insulation is power system important component, and its level directly affects power grid security reliability service.
China's weather environment is complicated and changeable, and some power transmission and transforming equipments are inevitably run in high humidity environment, are floated in air
The algae spores such as algae, liver moss, are deposited on insulator arrangement surface, once insulator surface environment is adapted to grow, spore will be raw
Long, aggregation, so as to form algae pollution layer in apparatus insulated equipment surface.Southern region of China, particularly Sichuan Basin power transformation are set
There is the phenomenon of the parasitic plants such as large-area alga growth in standby composite outer insulation or the multiple external insulation surface for spraying RTV, not only
There is large-area alga parasitism in exchange equipment complex external insulation, and extra-high voltage direct-current transformer external insulation is similarly subjected to algae
Threat.Different from common contamination, with the growth of algae, its area coverage on compound inslation surface increases, and sets insulation
The uncovered part in standby surface forms high field intensity region, produces corona discharge, the generation of electric discharge and the increase meeting of leakage current
Accelerate compound inslation aging, destroy compound inslation surface hydrophobicity；Meanwhile the growth alteration of algae compound inslation rough surface
Degree so that dunghill is easier to deposit on compound inslation surface and is not easy to be cleaned naturally, greatly accelerates compound inslation sublist
Area dirt speed.At present, not yet carry out impact evaluation research of the algal grown to power system external insulation both at home and abroad, and there is no algae
The appraisal procedure of class extent of growth.
The content of the invention
The invention provides a kind of insulator algal grown degree assessment method, solves existing algal grown scale evaluation
Method lacks problem, realizes and insulator algal grown degree is rationally assessed, and ensures the technique effect of power equipment safety.
In order to solve the above technical problems, this application provides a kind of insulator algal grown degree assessment method, the side
Method includes：
Step 1：Obtain insulator surface algae density ρ and algae and climb electric direction covering creepage distance of insulation ratio in insulator
Example D；
Step 2：The algae density and distance proportion obtained based on step 1, is assessed algal grown degree, is commented
Estimate result.
Wherein, the principle of the application is：Insulator surface algae density ρ and algae are obtained by equipment, such as microscope first
Class climbs electric direction covering creepage distance of insulation ratio D in insulator, and insulator surface algae density ρ and algae climb in insulator
Electric direction covering creepage distance of insulation ratio D is the data that can most reflect algae generation degree, passes through the knot of above-mentioned two data
Close, algal grown degree can be reflected, by the algal grown degree result evaluated, algal grown degree can be carried out
Accurate evaluation, and then judge whether algal grown has had influence on the safety of power equipment, if need to enter algal grown
Row respective handling, so as to ensure the safety and stability of power equipment.
Further, some position of insulator growth algae is chosen using microscope, and calculates the position algae
Stand density.
Further, the number of cells N of insulator surface algal grown is tested in the same visual angle of microscope, the visual angle
Area is S, then the stand density of algae is
Further, the creep age distance of insulator monolithic full skirt upper surface is L, the maximum creep age distance of algal grown covering
For d, then algae climbs electric direction covering creepage distance of insulation ratio in insulator and is
Wherein, the in succession cloudy intermittent drizzles in the rainy season big by the extraneous factors such as weather such as air humidity when the performance of insulating materials reduces
Season, wet environment etc. cause charged metal position to produce the phenomenon climbed as water wave sample electric arc along crust with insulating materials.Two
Insulator surface between pole has slight electric discharge phenomena, causes (general) warp in dendroid or leaf in surface of insulator
Network shape spark tracking, general this spark tracking are not connection the two poles of the earth, and electric discharge is generally not continuous, simply in specified conditions
Lower generation, such as wet weather, insulator surface have filthy, dust, and the time, which has been grown, can cause insulation damages.Two conductive components
Between, or a conductive component and equipment and easily contact between surface along the most short space length edges of insulating materials surface measurement
The distance of insulating surface electric discharge is that leakage distance is also referred to as creep age distance, abbreviation creep distance.Along insulation material between two current-carrying parts
The beeline for expecting surface is creep age distance, and direction is exactly to climb electric direction.
Further, algal grown scale evaluation is divided into 1 grade, 2 grades, 3 grades.
Further, when ρ is less than Second Threshold F less than first threshold E or D, algal grown scale evaluation is 1 grade.
Further, when ρ is more than first threshold E, and D is more than Second Threshold F and is less than the 3rd threshold value H；Or ρ is more than the
One threshold value E and when being less than the 4th threshold value G, algal grown scale evaluation is 2 grades.
Further, when ρ is more than the 4th threshold value G, and D is more than the 3rd threshold value H, algal grown scale evaluation is 3 grades.
Further, methods described also includes step 3：Based on different algal grown scale evaluation classification results, generation
Corresponding algae processing strategy.Artificial bonding apparatus is needed to be handled at once if 3 grades of situation, if 2 grades of situation
The medicament that growth can then be suppressed by spraying is handled, long-term to see if 1 grade of situation can then not have to be handled
Examine.
One or more technical schemes that the application provides, have at least the following technical effects or advantages：
The present invention is proposed based on covering creep age distance and algae for existing algal grown degree assessment method missing problem
The algal grown degree assessment method of density, algal grown is realized to composite outer insulation impact evaluation, analysis algal grown is to becoming
The organic external insulation failure law of electric equipment, carries out the classification of algal grown degree, and the algal grown of different extent of growth is carried
Go out specific aim measure, the final reliability of operation for improving composite outer insulation under high humidity environment.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, forms one of the application
Point, do not form the restriction to the embodiment of the present invention；
Fig. 1 is the insulator schematic diagram with algae；
Fig. 2 insulator surface algae density instrumentation plans；
Fig. 3 is covering creep age distance measurement；
Fig. 4 is to utilize insulator surface algae density and covering creep age distance joint assessment method classification schematic diagram.
Embodiment
The invention provides a kind of insulator algal grown degree assessment method, solves existing algal grown scale evaluation
Method lacks problem, realizes and insulator algal grown degree is rationally assessed, and ensures the technique effect of power equipment safety.
It is below in conjunction with the accompanying drawings and specific real in order to be more clearly understood that the above objects, features and advantages of the present invention
Mode is applied the present invention is further described in detail.It should be noted that in the case where not conflicting mutually, the application's
Feature in embodiment and embodiment can be mutually combined.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still, the present invention may be used also
To be implemented using other different from the other modes in the range of being described herein, therefore, protection scope of the present invention is not by under
The limitation of specific embodiment disclosed in face.
According to the investigation to transformer station support insulator growth algae, algae is typically grown on the outward flange of insulator, and
Different regions stand density is inconsistent, and typical algal grown schematic diagram is as shown in Figure 1.Composite outer insulation is broken according to algae
Bad mechanism, the width that algae climbs electric direction along insulator is wider, and the density of algae is bigger, and the degree that external insulation declines is more serious.
Based on this, the present invention proposes the algal grown degree assessment method based on covering creep age distance and algal grown density.
Fig. 2 is the method for insulator surface test algae density.Some of insulator growth algae is chosen using microscope
Position, the number of cells N of insulator surface algal grown is tested using same visual angle, if the area at the visual angle is S, then algae
Stand density is
Fig. 3, which is algae, climbs the measuring method of electric direction covering creepage distance of insulation ratio, insulator monolithic umbrella in insulator
The creep age distance of skirt upper surface is L, and the maximum creep age distance of algal grown covering is d, then algae climbs electric direction in insulator and covered
Lid creepage distance of insulation ratio is
Fig. 4 is joint covering creep age distance and the algal grown degree assessment method schematic diagram of algal grown density, will be covered
Lid creep age distance is short or stand density is dredged, and to be evaluated as algal grown degree slight (being illustrated as 1 grade of region), by covering climb electricity away from
Algal grown degree is evaluated as from general or stand density in general typically (being illustrated as 2 grades of regions), it is wide by creep age distance is covered
And stand density it is close to be evaluated as algal grown serious (being illustrated as 3 grades of regions).
Technical scheme in above-mentioned the embodiment of the present application, at least has the following technical effect that or advantage：
The present invention is proposed based on covering creep age distance and algae for existing algal grown degree assessment method missing problem
The algal grown degree assessment method of density, algal grown is realized to composite outer insulation impact evaluation, analysis algal grown is to becoming
The organic external insulation failure law of electric equipment, carries out the classification of algal grown degree, and the algal grown of different extent of growth is carried
Go out specific aim measure, the final reliability of operation for improving composite outer insulation under high humidity environment.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make other change and modification to these embodiments.So appended claims be intended to be construed to include it is excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (9)
1. a kind of insulator algal grown degree assessment method, it is characterised in that methods described includes：
Step 1：Obtain insulator surface algae density ρ and algae and climb electric direction covering creepage distance of insulation ratio D in insulator；
Step 2：The algae density and distance proportion obtained based on step 1, is assessed algal grown degree, is obtained and is assessed knot
Fruit.
2. insulator algal grown degree assessment method according to claim 1, it is characterised in that chosen using microscope
Insulator grows some position of algae, and calculates the stand density of the position algae.
3. insulator algal grown degree assessment method according to claim 2, it is characterised in that regard microscope is same
The number of cells N of insulator surface algal grown is tested in angle, the area at the visual angle is S, then the stand density of algae is
4. insulator algal grown degree assessment method according to claim 1, it is characterised in that insulator monolithic full skirt
The creep age distance of upper surface is L, and the maximum creep age distance of algal grown covering is d, then algae climbs electric direction covering in insulator
Creepage distance of insulation ratio is
5. insulator algal grown degree assessment method according to claim 1, it is characterised in that algal grown degree is commented
Estimate and be divided into 1 grade, 2 grades, 3 grades.
6. insulator algal grown degree assessment method according to claim 5, it is characterised in that when ρ is less than the first threshold
When value E or D are less than Second Threshold F, algal grown scale evaluation is 1 grade.
7. insulator algal grown degree assessment method according to claim 5, it is characterised in that when ρ is more than the first threshold
Value E, and D is more than Second Threshold F and when being less than the 3rd threshold value H；Or ρ is more than first threshold E and when being less than the 4th threshold value G, algae
Extent of growth is evaluated as 2 grades.
8. insulator algal grown degree assessment method according to claim 5, it is characterised in that when ρ is more than the 4th threshold
Value G, and when D is more than the 3rd threshold value H, algal grown scale evaluation is 3 grades.
9. insulator algal grown degree assessment method according to claim 5, it is characterised in that methods described also includes
Step 3：Based on different algal grown scale evaluation classification results, corresponding algae processing strategy is generated.
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| CN110826615A (en) * | 2019-10-31 | 2020-02-21 | 南方电网科学研究院有限责任公司 | Method, device, equipment, medium and data acquisition system for classifying pollutants |
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