CN106295207B - Insulator dirty degree appraisal procedure based on meteorological data statistics - Google Patents
Insulator dirty degree appraisal procedure based on meteorological data statistics Download PDFInfo
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Abstract
The present invention relates to a kind of insulator dirty degree appraisal procedures based on meteorological data statistics, it is characterised in that：It includes the following steps：Step S1, meteorological data counts；Step S2, contamination process divides；Step S3, the close variation of salt calculates；Step S4, gradation for surface pollution is assessed.The present invention provides a feasible, effective pollution degree appraisal procedure for the deficient and electric transmission line isolator in high pollution area of filthy on-Line Monitor Device, formulates the Flash Decontamination Measurements based on insulator dirty degree and implements have important Practical significance.
Description
Technical field
It prevents and reduces natural disasters technical field the present invention relates to power grid, and in particular to a kind of insulator based on meteorological data statistics is dirty
Dirty degree appraisal procedure.
Background technology
After overhead transmission line insulator solid under by natural conditions, liquids and gases conductive materials pollution contamination, big
Under the humidity meteorological condition such as mist, dew, drizzle, ice-melt, snow melt, insulation performance will significantly reduce, may be under working voltage
Pollution flashover accident occurs.With the development of industry, the aggravation polluted, pollution flashover accident frequently occur.According to incompletely statistics, the winter in 2001
Rain, snow, the greasy weather gas in season North, Northeast China area cause 238 66~500kV transmission lines of electricity, 34 substations successively to occur altogether
Pollution flashover accident；Winter in 2006 Shandong, Hebei and Beijing-Tianjin some areas foggy weather cause 500kV circuits that 7 sudden strains of a muscle occur in succession
Network accident；5 pollution flashover accidents have occurred in the eastern DC power transmission line of ± 660kV silver that in October, 2010 puts into operation altogether, cause huge
Economic loss.
In terms of pollution flashover prevention, power department, which has been formulated, a series of such as to be increased creepage distances, applies dirt resistance coatings, using having
Machine composite insulator periodically cleans, replaces the Flash Decontamination Measurements such as bad or zero resistance insulator, achieves certain effect.On but
The prevention for stating Flash Decontamination Measurements substantially and be passive-type, effectively assesses insulator dirty degree due to lacking, leads to pollution flashover
Control effect is less desirable.China's current standard is mainly filthy characteristic quantity with equivalent salt density, and is passed through according to transmission line of electricity
The wet feature of dirt and operating experience in area carry out Transmission Line Design, operation and maintenance and pollution flashover accident analysis.Currently, obtaining insulation
The main method of sub- salt density value is that manual sampling measures, and not only needs to carry out offline measurement experiment under power failure, but also
Time-consuming for this method, costly, efficiency is low, is played the role of for the Strategies of Maintenance based on equipment state limited.
Invention content
The purpose of the present invention is to provide a kind of insulator dirty degree appraisal procedures based on meteorological data statistics.The present invention
From electric transmission line isolator dynamic contamination process, pass through gas related with insulator dynamic contamination in the statistical estimation period
As parameter, calculates separately the close incrementss of salt of the insulator after filthy accumulation and salt after rainfall cleaning process is close subtracts
On a small quantity, and the salt density value of initial time insulator is combined to complete to assess the determination of moment insulator contamination grade.
In order to solve the above technical problems, a kind of insulator dirty degree assessment based on meteorological data statistics disclosed by the invention
Method, it is characterised in that：It includes the following steps：
Step S1, meteorological data counts：As unit of day, statistics initial time to assessment to be assessed section of transmission line of electricity of moment
Meteorological data at shaft tower；
Step S2, contamination process divides：Rainfall information in the meteorological data obtained according to step S1, by insulator
Dynamic contamination process is divided into filthy accumulation and the process alternateed is cleaned in rainfall；
Step S3, the close variation of salt calculates：On the basis of classical filthy accumulation and rainfall washing moulding, meteorologic parameter is considered
Influence to insulator contamination cumulative speed and rainfall cleaning performance calculates the close change of salt after insulator experience dynamic contamination process
Change amount；
Step S4, gradation for surface pollution is assessed：Salt close variable quantity of the insulator within the entirely assessment period is sought, in conjunction with initial
The salt density value at moment determines the current gradation for surface pollution of insulator.
Beneficial effects of the present invention：
Pass through the variation for counting insulator surface equivalent salt density and corresponding meteorological data, analysis insulator dynamic product
Coupled relation between dirty and meteorological data, it is proposed that a kind of insulator dirty degree appraisal procedure based on meteorological data statistics.
This method need to only input meteorological data related with insulator dynamic contamination, in conjunction with the filthy accumulation counted by historical data
And calculating parameter is cleaned in rainfall, you can the assessment of insulator dirty degree is completed, it is deficient and locate for filthy on-Line Monitor Device
Electric transmission line isolator in high pollution area provides a feasible, effective pollution degree appraisal procedure, to being based on insulator dirt
The Flash Decontamination Measurements of dirty degree are formulated and implement have important Practical significance.
Description of the drawings
Fig. 1 is the flow chart of the present invention；
Fig. 2 is that the insulator dynamic contamination process of the embodiment of the present invention divides figure.
Specific implementation mode
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail：
Insulator dirty degree appraisal procedure proposed by the present invention based on meteorological data statistics, such as Fig. 1, it includes following step
Suddenly：
Step S1, meteorological data counts：As unit of day, statistics initial time to assessment to be assessed section of transmission line of electricity of moment
Meteorological data at shaft tower；
Step S2, contamination process divides：Rainfall information in the meteorological data obtained according to step S1, by insulator
Dynamic contamination process is divided into filthy accumulation and the process alternateed is cleaned in rainfall, as shown in Figure 2；
Step S3, the close variation of salt calculates：On the basis of classical filthy accumulation and rainfall washing moulding, meteorologic parameter is considered
Influence to insulator contamination cumulative speed and rainfall cleaning performance calculates the close change of salt after insulator experience dynamic contamination process
Change amount；
Step S4, gradation for surface pollution is assessed：Salt close variable quantity of the insulator within the entirely assessment period is sought, in conjunction with initial
The salt density value at moment determines the current gradation for surface pollution of insulator.
The meteorological data counted in the step S1 of above-mentioned technical proposal is initial time extremely assessment moment electric power line pole tower
Locate daily air quality index (AQI) and rainfall.
The size that daily rainfall in the assessment period is judged in the step S2 of above-mentioned technical proposal, if rainfall is zero,
Then it is divided into filthy accumulation；If rainfall is more than zero, be then divided into rainfall cleaning process, will continuous filthy accumulation or
Rainfall cleaning is classified as a process, and then the entire dynamic contamination process of insulator is divided into filthy accumulation and rainfall cleaning phase
Mutual alternate process.
The filthy Accumulation Model of classics used in the step S3 of above-mentioned technical proposal has ignored air pollution degree to filth
The dynamic effects of accumulation, calculation formula are：
In formula, SdFor equivalent salt density, unit mg/cm2；A is saturation equivalent salt density, the value of A and the structure model of insulator and
Running environment is related, unit mg/cm2；KlFor constant；T is the contamination time；τ is the constant for characterizing contamination rate；E is that nature is normal
Number.
After introducing the influence of air quality index (AQI), after being filthy accumulation for i-th dynamic contamination process
The close increment Δ S of saltiCalculation formula is：
In formula, SiFor the equivalent salt density of insulator surface after i-th of dynamic contamination process from initial time, unit mg/
cm2；λ is the average value of air quality index (AQI) during contamination；ΔtiFor the duration of contamination process, unit is day；A
To be saturated equivalent salt density；k1Increase correction factor for insulator salt density；k2For insulator salt density rate of rise correction factor；M is sky
Impact factor of the makings volume index (AQI) to the close rate of rise of insulator surface salt；E is natural constant.
The classical rainfall washing moulding used in the step S3 of above-mentioned technical proposal think the cleaning rate of contaminant deposition with
The filthy amount of accumulation is directly proportional, is represented by：
In formula, SdFor equivalent salt density, ω is accumulated rainfall, unit mm；kqThe close effect of insulator surface salt is cleaned for rainfall
Attenuation coefficient, unit mm-1；
Consider influence of the rain time to pollution severity of insulators cleaning performance, is drop for j-th of dynamic contamination process
The close decrement Δ S of salt after rain cleaning processjCalculation formula is represented by：
In formula, SjFor the equivalent salt density of insulator surface after j-th of dynamic contamination process from initial time, unit mg/
cm2；ΔtjFor the duration of cleaning process, unit is day；k3For the ratio of insulator surface part capable of washing；k4For rainfall
Impact factor of the time to pollution severity of insulators cleaning performance；E is natural constant.
The close variation delta S of salt of insulator after any one dynamic contamination process k is calculated in the step S4 of above-mentioned technical proposalk
Calculation formula is：
In formula, n values are 0 or 1, and n=0 indicates that filthy accumulation, n=1 indicate rainfall cleaning process；ΔtkFor the mistake
The duration of journey, unit are day；A is saturation equivalent salt density；λ is the average value of air quality index (AQI) during contamination；
M is impact factor of the air quality index (AQI) to the close rate of rise of insulator surface salt；k1Increase for insulator salt density and corrects
Coefficient；k2For insulator salt density rate of rise correction factor；k3For the ratio of insulator surface part capable of washing；k4For rainfall when
Between to the impact factor of pollution severity of insulators cleaning performance；E is natural constant；ω is the accumulative rainfall in rainfall cleaning process
Amount, unit mm.
The close S of salt of assessment moment insulator is calculated in the step S4 of above-mentioned technical proposalpHave
In formula, S0For the equivalent salt density of initial time insulator surface to be assessed, unit mg/cm2；N is the assessment period
The filthy accumulation for including inside and rainfall cleaning process sum.After the calculating for completing insulator surface equivalent salt density, according to state's household electrical appliances
What net company formulated《Q/GDW 152-2006 electric system filth classifications and external insulation selection criteria》, assess the filth of insulator
Grade.
The content that this specification is not described in detail belongs to the prior art well known to professional and technical personnel in the field.
Claims (6)
1. a kind of insulator dirty degree appraisal procedure based on meteorological data statistics, it is characterised in that：It includes the following steps：
Step S1, meteorological data counts：As unit of day, statistics initial time to assessment to be assessed section of electric power line pole tower of moment
The meteorological data at place；
Step S2, contamination process divides：Rainfall information in the meteorological data obtained according to step S1, by the dynamic of insulator
Contamination process is divided into filthy accumulation and the process alternateed is cleaned in rainfall；
Step S3, the close variation of salt calculates：On the basis of classical filthy accumulation and rainfall washing moulding, consider meteorologic parameter to exhausted
The influence of edge filth cumulative speed and rainfall cleaning performance calculates the close variation of salt after insulator experience dynamic contamination process
Amount；
Step S4, gradation for surface pollution is assessed：Salt close variable quantity of the insulator within the entirely assessment period is sought, in conjunction with initial time
Salt density value, determine the current gradation for surface pollution of insulator；
The close variation delta S of salt of insulator after any one dynamic contamination process k is calculated in the step S3kCalculation formula is：
In formula, n values are 0 or 1, and n=0 indicates that filthy accumulation, n=1 indicate rainfall cleaning process；ΔtkFor the process
Duration, unit are day；A is saturation equivalent salt density；λ is the average value of air quality index in filthy accumulation；M is sky
Impact factor of the makings volume index to the close rate of rise of insulator surface salt；k1Increase correction factor for insulator salt density；k2It is exhausted
The close rate of rise correction factor of edge alite；k3For the ratio of insulator surface part capable of washing；k4Be rain time to insulate sublist
The impact factor of face filth cleaning performance；E is natural constant；ω is the accumulated rainfall in rainfall cleaning process, unit mm；kq
The attenuation coefficient of the close effect of insulator surface salt, unit mm are cleaned for rainfall-1。
2. the insulator dirty degree appraisal procedure according to claim 1 based on meteorological data statistics, it is characterised in that：Step
The meteorological data counted in rapid S1 be air quality index daily at initial time to assessment moment electric power line pole tower and
Rainfall.
3. the insulator dirty degree appraisal procedure according to claim 1 based on meteorological data statistics, it is characterised in that：Step
Judge that the size of rainfall is then divided into filthy accumulation if rainfall is zero daily in the assessment period in rapid S2；Such as drop
Rainfall is more than zero, then is divided into rainfall cleaning process, continuous filthy accumulation or rainfall cleaning is classified as a process, in turn
The entire dynamic contamination process of insulator is divided into filthy accumulation and the process alternateed is cleaned in rainfall.
4. the insulator dirty degree appraisal procedure according to claim 1 based on meteorological data statistics, it is characterised in that：Step
The filthy Accumulation Model of classics used in rapid S3 has ignored air pollution degree to the dynamic effects of filth accumulation, calculation formula
For：
In formula, SdFor equivalent salt density, unit mg/cm2；A is saturation equivalent salt density, the value of A and the structure model of insulator and operation
Environment is related, unit mg/cm2；KlFor constant；T is the contamination time；τ is the constant for characterizing contamination rate, and e is natural constant；
It is the close growth of salt after filthy accumulation for i-th of dynamic contamination process after introducing the influence of air quality index
Measure Δ SiCalculation formula is：
In formula, SiFor the equivalent salt density of insulator surface after i-th of dynamic contamination process from initial time, unit mg/cm2；λ
For the average value of air quality index during contamination；ΔtiFor the duration of contamination process, unit is day；A is saturation etc.
It is close to be worth salt；k1Increase correction factor for insulator salt density；k2For insulator salt density rate of rise correction factor；M refers to for air quality
Several impact factors to the close rate of rise of insulator surface salt；E is natural constant.
5. the insulator dirty degree appraisal procedure according to claim 1 based on meteorological data statistics, it is characterised in that：Step
The classical rainfall washing moulding used in rapid S3 thinks that the cleaning rate of contaminant deposition is directly proportional to filthy amount, is represented by：
In formula, SdFor equivalent salt density, ω is accumulated rainfall, unit mm；kqDeclining for the close effect of insulator surface salt is cleaned for rainfall
Subtract coefficient, unit mm-1；
Consider influence of the rain time to pollution severity of insulators cleaning performance, is that rainfall is clear for j-th of dynamic contamination process
Wash the close decrement Δ S of salt after journeyjCalculation formula is represented by：
In formula, SjFor the equivalent salt density of insulator surface after j-th of dynamic contamination process from initial time, unit mg/cm2；Δ
tjFor the duration of cleaning process, unit is day；k3For the ratio of insulator surface part capable of washing；k4For rain time pair
The impact factor of pollution severity of insulators cleaning performance；E is natural constant；kqThe close effect of insulator surface salt is cleaned for rainfall
Attenuation coefficient, unit mm-1。
6. the insulator dirty degree appraisal procedure according to claim 1 based on meteorological data statistics, it is characterised in that：Step
The close S of salt of assessment moment insulator is calculated in rapid S4pHave
In formula, S0For the equivalent salt density of initial time insulator surface to be assessed, unit mg/cm2；N is packet in the assessment period
The filthy accumulation contained and rainfall cleaning process sum；ΔSkFor the close variable quantity of salt of insulator after any one dynamic contamination process k.
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| CN107274091B (en) * | 2017-06-12 | 2020-09-22 | 武汉大学 | Assessment and early warning method and system for external insulation anti-pollution flashover performance of power transmission and transformation equipment |
| CN107704655A (en) * | 2017-09-05 | 2018-02-16 | 国网浙江省电力公司电力科学研究院 | A kind of direct current transportation wire filth appraisal procedure and system |
| CN108022011B (en) * | 2017-11-30 | 2020-06-12 | 国家电网公司 | Dynamic prediction method for insulator pollution accumulation in natural environment |
| CN108957253B (en) * | 2018-05-29 | 2020-08-21 | 长春工程学院 | Early warning method for insulator pollution flashover caused by irregular high dust |
| CN113159365B (en) * | 2020-12-31 | 2023-04-18 | 广东电网有限责任公司电力科学研究院 | Power transmission and transformation equipment pollution monitoring and early warning method and device |
| CN113780828B (en) * | 2021-09-14 | 2024-03-19 | 深圳市恺恩科技有限公司 | Power transmission line insulator pollution detection method, system and storage medium |
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