CN103245761A - Method for grading polluted areas through pollution rates - Google Patents
Method for grading polluted areas through pollution rates Download PDFInfo
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- CN103245761A CN103245761A CN2013101572484A CN201310157248A CN103245761A CN 103245761 A CN103245761 A CN 103245761A CN 2013101572484 A CN2013101572484 A CN 2013101572484A CN 201310157248 A CN201310157248 A CN 201310157248A CN 103245761 A CN103245761 A CN 103245761A
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Abstract
The invention discloses a method for grading polluted areas through pollution rates. The method comprises the following steps of: (1) mounting an external insulation equipment pollution amount measurement device; (2) setting the pollution amount measurement device; (3) recording a surface pollution amount of external insulation equipment at a starting point moment in a pollution period and a surface pollution amount of the external insulation equipment at an end point moment in the pollution period, and recording a time interval of the starting point moment and the end point moment of the pollution period, wherein a detected item is a salt density, an ash density or a density of one matter; (4) calculating the pollution rates of the external insulation equipment within the pollution period; (5) counting the pollution rates and solving a mean pollution rate; (6) solving mean area pollution rates of all regions; (7) calculating a distribution range of the mean pollution rates of the regions; and (8) calculating a grading parameter K of the polluted areas in each region, and grading the polluted areas according to the range of the K. The method for grading the polluted areas through the pollution rates has the advantages of capacity of dynamically grading the polluted areas and predicating the pollution amount in future, short measurement period, simplicity and convenience in calculation and the like.
Description
Technical field
The present invention relates to the dirty district of a kind of power transmission and transformation external insulation equipment grade classification technology, particularly a kind of method of dividing dirty district grade with contamination speed.
Background technology
Pollution flashover accident has that influence area is big, power off time is long, place tripping operation often makes and closes on characteristics such as power transmission and transforming equipment is involved action, the economic loss that causes is big, is a threat greatly of power external insulation equipment normal operation, electric power netting safe running.Studies show that both at home and abroad the contamination order of severity configuration appropriate insulation level according to external insulation can prevent effectively that pollution flashover accident from taking place.Therefore, the reasonable division of the dirty district of external insulation grade is particularly important to the anti-pollution flashover work of electrical network, can be newly-built line design external insulation level, existing circuit and carries out that planned accent is climbed, operation department implements the anti-pollution flashover measure of specific aim etc. scientific basis is provided.
At present, China is main divides dirty district grade according to " high-tension overhead line and send out, dirty level and the external insulation choice criteria distinguished of electric substation's environment ".This standard from, weather condition and equivalent salt deposit density, is divided into different gradation for surface pollution with overhead transmission line with electric substation, generating plant according to filthy character, dirty spacing.After research and propose with the annual equivalent salt density of the close replacement of saturated salt, do not have pollution flashover in the hope of guaranteeing circuit not clean for a long time.
Yet the positive high speed development of current China economy, it is multiple to extend the extreme weather that the automobile exhaust pollution that brings and global climate cause unusually everywhere based on energy structure, the extensive migration of contaminated industry, the highway of coal, all make power external insulation equipment contamination amount significantly dynamic change occur, pollution range constantly changes, and dirty district grade also presents dynamic variation characteristic.Therefore tradition is divided the dirty method of distinguishing grade and is rested on static the description contamination order of severity stage, required time length is adjusted in each measurement, the manpower and materials cost is big, often lag behind the dynamic change of regional contamination characteristic, cause being difficult to accurately characterize the current external insulation contamination degree in each department, and can not realize the prediction of the following contamination amount of external insulation equipment.
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art with not enough, a kind of method of dividing dirty district grade with contamination speed is provided, this method is dynamically described the contamination order of severity of different regions insulator arrangement, and the contamination amount of interior different time of prediction external insulation equipment contamination phase.
Purpose of the present invention is achieved through the following technical solutions:
A kind of method with the dirty district of contamination speed division grade can comprise the steps:
(1) chooses a plurality of representative check points in each area, at the power transmission and transformation external insulation equipment of check point external insulation equipment contamination measuring device is installed;
(2) set the contamination measuring device and measure external insulation equipment surface contamination amount with the rainfall next time zero hour (being starting point and the terminal point of contamination phase of contamination phase) finish time in each rainfall;
(3) record each starting point moment contamination phase external insulation equipment surface contamination amount m1 and the terminal point moment external insulation equipment surface contamination amount m2 that the contamination measuring device records, and the time interval t of twice measurement, the physical quantity m1 that the contamination measuring device detects and m2 can be that salt is close, the density of close or certain material of ash;
(4) calculate each check point external insulation equipment at the contamination speed S of a contamination in the phase:
S＝﹙m2－m1﹚÷t；
(5) add up the contamination speed of external insulation equipment all contamination phases in the certain hour section of each check point, all contamination speed S in this time period ask for arithmetical mean or ask for weighted mean according to the length of corresponding contamination phase to each check point, obtain the average contamination speed Sp of each check point external insulation equipment in this time period;
(6) add up the average contamination speed of each area all check points in the above time period, average contamination speed Sp to all check points of somewhere asks for arithmetical mean or asks for weighted mean according to the significance level of this check point in the regional power grid safe operation, tries to achieve the zone leveling contamination speed Sd of this area;
(7) the average contamination rate distribution in zoning scope R:R=Sdmax-Sdmin, wherein Sdmax is the maximal value of zone leveling contamination speed in all statistics areas, Sdmin is minimum value;
(8) calculate the dirty division parameter K of distinguishing grade in each department: K=﹙ Sd-Sdmin ﹚ ÷ R, divide dirty district grade (as shown in table 1, as to be dirt district grade classification table) according to the scope of K value:
| K value scope | Dirty district grade |
| 0.8≤K≤1 | The I level, contamination speed is fast especially |
| 0.6≤K＜0.8 | The II level, contamination speed is very fast |
| 0.4≤K＜0.6 | The III level, contamination speed is general |
| 0.2≤K＜0.4 | The IV level, contamination speed is slower |
| 0≤K＜0.2 | The V level, contamination speed is slow |
Table 1
A complete and effective contamination phase refers to finish the extremely process of rainfall next time since a rainfall.
Calculating average contamination speed can be benchmark with different time length such as the previous year, the preceding first quarter or the previous moons, obtain average contamination speed of annual contamination speed, season, monthly average contamination speed etc., at any time call the historical data of record, can adjust the dirt district grade of each department in real time.
Because it is little that somewhere filthy feature and weather condition etc. in one not long period influence the factors vary of external insulation equipment contamination amount, therefore continues to detect the zone leveling contamination speed Sd that obtains and can dynamically characterize this area's external insulation equipment contamination order of severity in a short time.
In conjunction with the measured current contamination amount PN of certain check point contamination measuring device, utilize the average contamination speed Sp of this check point or the zone leveling contamination speed Sd of this area, can predict the contamination amount PF behind this check point certain hour section T in the contamination phase:
PF=PN+Sp * T or PF=PN+Sd * T.
Principle of work of the present invention: the present invention divides dirty district grade with power external insulation contamination speed, choose a plurality of representative check points in each area, power external insulation equipment at check point is installed the contamination measurement mechanism, being set in a rainfall finishes back and rainfall next time and begins preceding two time points (being the Origin And Destination of contamination phase) and measure, the contamination amount m1 of twice measurement gained and the time interval (the being contamination phase length) t of m2 and twice measurement calculate the contamination speed S of a contamination phase before and after the record; Collect the average contamination speed Sp that calculates each check point external insulation equipment in the certain hour section; The zone leveling contamination speed Sd of statistical computation each department in the above-mentioned time period again; The dirt district grade classification parameter K of statistical computation each department is divided dirty district grade on this basis.The invention solves the existing dirty district rank method of dividing and staticly to describe each regional power equipment contamination order of severity, measuring period is long, and lag behind environmental pollution, meteorological condition and change, and each dirty district grade of adjusting need spend the problem that a large amount of manpower and materials redeterminate, and algorithm is simple, be easy to grasp, can realize accurately predicting that external insulation equipment in the contamination amount of following time, provides the anti-pollution flashover decision-making foundation that meets the contamination present situation for electric power O﹠M department.
The present invention has following advantage and effect with respect to prior art:
1, the invention solves tradition divide dirty district rank method can only the static problem of describing the different regions power external insulation equipment contamination order of severity, make that the dirty district of power external insulation grade classification can be moved with pollution source, pollution range changes, weather is unstable changes and dynamically adjust;
2, the invention solves tradition divides dirty district rank method and needs for many years that measurement data is foundation, implementation cycle is long, lag behind the problem of the variation of pollution source and pollution range, climate change, the implementation cycle of dividing dirty district grade is shortened greatly, and the implementation cycle flexibly changing;
3, the present invention can predict perspectively that the contamination amount of power external insulation equipment makes the power external insulation contamination amount according to real-time estimate at contamination point sometime in the phase, implements cleaning, transfers and suitably anti-pollution flashover measure such as climb and become possibility;
4, computing method of the present invention are simple, are easy to grasp, and are convenient to promote
Description of drawings
Fig. 1 is the present invention divides dirty district rank method with contamination speed process flow diagram.
Embodiment
The present invention is described in further detail below in conjunction with embodiment and accompanying drawing, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1, the present invention divides the dirty method of distinguishing grade with contamination speed, realizes by following step:
(1) chooses a plurality of representative check points in each area, at the power transmission and transformation external insulation equipment of check point external insulation equipment contamination measuring device is installed;
(2) set external insulation equipment contamination measuring device and measure external insulation equipment surface contamination amount with the rainfall next time zero hour (being starting point and the terminal point of contamination phase of contamination phase) finish time in each rainfall;
(3) record each starting point moment contamination phase external insulation equipment surface contamination amount m1 and the terminal point moment external insulation equipment surface contamination amount m2 that the contamination measuring device records, and the time interval t of twice measurement.The physical quantity m1 that the contamination measuring device detects and m2 can be that salt is close, the density of close or certain material of ash, if it is close to detect the salt on external insulation equipment surface, then divide dirty district grade according to the dirty speed of salt close packing, and measurable contamination is in the phase, the close amount of the salt on external insulation equipment surface, if detect other physical quantity in like manner, also can take all factors into consideration a plurality of physical quantitys as the foundation of dividing dirty district grade and predict contamination total contamination amount in the phase;
(4) calculate each check point external insulation equipment at the contamination speed S of a contamination in the phase:
S＝﹙m2－m1﹚÷t；
(5) add up the contamination speed of external insulation equipment all contamination phases in the certain hour section of each check point, all contamination speed S in this time period ask for arithmetical mean or ask for weighted mean according to the length of corresponding contamination phase to each check point, obtain the average contamination speed Sp of each check point external insulation equipment in this time period;
(6) add up the average contamination speed of each area all check points in the above time period, average contamination speed Sp to all check points of somewhere asks for arithmetical mean or asks for weighted mean according to the significance level of this check point in the regional power grid safe operation, tries to achieve the zone leveling contamination speed Sd of this area;
(7) the average contamination rate distribution in zoning scope R:R=Sdmax-Sdmin, wherein Sdmax is the maximal value of zone leveling contamination speed in all statistics areas, Sdmin is minimum value;
(8) calculate the dirty division parameter K of distinguishing grade in each department: K=﹙ Sd-Sdmin ﹚ ÷ R, divide dirty district grade (as shown in table 1, as to be dirt district grade classification table) according to the scope of K value:
| K value scope | Dirty district grade |
| 0.8≤K≤1 | The I level, contamination speed is fast especially |
| 0.6≤K＜0.8 | The II level, contamination speed is very fast |
| 0.4≤K＜0.6 | The III level, contamination speed is general |
| 0.2≤K＜0.4 | The IV level, contamination speed is slower |
| 0≤K＜0.2 | The V level, contamination speed is slow |
Table 1
A complete and effective contamination phase refers to finish the extremely process of rainfall next time since a rainfall.
Calculating average contamination speed can be benchmark with different time length such as the previous year, the preceding first quarter or the previous moons, obtain average contamination speed of annual contamination speed, season, monthly average contamination speed etc., at any time call the historical data of record, can adjust the dirt district grade of each department in real time.
Because it is little that somewhere filthy feature and weather condition etc. in one not long period influence the factors vary of external insulation equipment contamination amount, therefore continues to detect the zone leveling contamination speed Sd that obtains and can dynamically characterize this area's external insulation equipment contamination order of severity in a short time.
In conjunction with the measured current contamination amount PN of certain check point contamination measuring device, utilize the average contamination speed Sp of this check point or the zone leveling contamination speed Sd of this area, can predict the contamination amount PF behind this check point certain hour section T in the contamination phase:
PF=PN+Sp * T or PF=PN+Sd * T.
Above-described embodiment is preferred implementation of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under spiritual essence of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (7)
1. the method with the dirty district of contamination speed division grade is characterized in that, comprises the steps:
(1) chooses a plurality of representative check points in each area, at the power transmission and transformation external insulation equipment of check point external insulation equipment contamination measuring device is installed;
(2) set the contamination measuring device and respectively measure one time external insulation equipment surface contamination amount in each rainfall finish time the zero hour with rainfall next time;
(3) record contamination phase starting point external insulation equipment surface contamination amount m1 and the final external insulation equipment surface contamination amount m2 constantly of contamination constantly that described contamination measuring device records, the physical quantity that the contamination measuring device detects can be that salt is close, the density of close or certain material of ash, and records described contamination phase starting point constantly and the time interval t in the final moment of contamination;
(4) calculate each check point external insulation equipment at the contamination speed S of a contamination in the phase:
S＝﹙m2－m1﹚÷t，
Contamination speed S is the increment of the interim external insulation equipment of a contamination surface contamination amount and the merchant of contamination phase time span;
(5) add up the contamination speed of external insulation equipment all contamination phases in the certain hour section of each check point, all contamination speed S in the above time period ask for arithmetical mean or ask for weighted mean according to the length of corresponding contamination phase to each check point, obtain in the above time period the average contamination speed Sp of each check point external insulation equipment;
(6) add up the average contamination speed of each area all check points in the above time period, average contamination speed Sp to all check points of somewhere asks for arithmetical mean or asks for weighted mean according to the significance level of this check point in the regional power grid safe operation, tries to achieve the zone leveling contamination speed Sd of this area;
(7) the average contamination rate distribution in zoning scope R:R=Sdmax-Sdmin, wherein Sdmax is the maximal value of zone leveling contamination speed in all statistics areas, Sdmin is minimum value;
(8) calculate the dirty division parameter K of distinguishing grade in each department: K=﹙ Sd-Sdmin ﹚ ÷ R, divide dirty district grade according to the scope of K value.
2. the method with the dirty district of contamination speed division grade according to claim 1 is characterized in that: in the described step (2), to the process that rainfall next time begins, be a complete and effective contamination phase from last rainfall end.
3. according to claim 1 with the dirty method of distinguishing grade of contamination speed division, it is characterized in that: in the described step (5), the calculating of average contamination speed can be benchmark with different time length such as the previous year, the preceding first quarter or the previous moons, calculate average contamination speed of annual contamination speed, season, monthly average contamination speed etc., at any time call the historical data of record, adjust the dirt district grade of each department in real time.
4. according to claim 1 with the dirty method of distinguishing grade of contamination speed division, it is characterized in that: the zone leveling contamination speed Sd that adopts detection to obtain in the step (6) dynamically represents this area's external insulation equipment contamination order of severity in a short time.
5. according to claim 1 with the dirty method of distinguishing grade of contamination speed division, it is characterized in that: in conjunction with the measured current contamination amount PN of certain check point contamination measuring device, utilize the average contamination speed Sp of this check point or the zone leveling contamination speed Sd of this area, predict the contamination amount PF behind this check point certain hour section T in the contamination phase.
6. according to claim 5 with the dirty method of distinguishing grade of contamination speed division, it is characterized in that: the formula that calculates described contamination amount PF is as follows:
PF＝PN＋Sp×T，
Prediction contamination amount PF behind certain check point certain hour section T is that current contamination amount PN adds the average contamination speed Sp of this check point and the product of time T.
7. according to claim 5 with the dirty method of distinguishing grade of contamination speed division, it is characterized in that: the formula that calculates described contamination amount PF is as follows:
PF＝PN＋Sd×T，
Prediction contamination amount PF behind certain check point certain hour section T is that current contamination amount PN adds the zone leveling contamination speed Sd of this check point location and the product of time T.
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Cited By (3)
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| CN104268793A (en) * | 2014-09-18 | 2015-01-07 | 国家电网公司 | Power grid unclean area distribution diagram dynamic revising method based on atmospheric environment quality |
| CN109597961A (en) * | 2018-10-19 | 2019-04-09 | 国网浙江省电力有限公司电力科学研究院 | Differentiate that the different umbellate form insulator contaminations of accuracy compare optimization algorithm based on dirty area |
| CN110108536A (en) * | 2019-06-18 | 2019-08-09 | 中国计量大学 | A kind of standard board manufacturing method compared for settled date mirror area gray scale detection |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104268793A (en) * | 2014-09-18 | 2015-01-07 | 国家电网公司 | Power grid unclean area distribution diagram dynamic revising method based on atmospheric environment quality |
| CN109597961A (en) * | 2018-10-19 | 2019-04-09 | 国网浙江省电力有限公司电力科学研究院 | Differentiate that the different umbellate form insulator contaminations of accuracy compare optimization algorithm based on dirty area |
| CN109597961B (en) * | 2018-10-19 | 2022-11-29 | 国网浙江省电力有限公司电力科学研究院 | Optimization algorithm for different umbrella-shaped insulator dirt accumulation ratios based on dirt area distinguishing accuracy |
| CN110108536A (en) * | 2019-06-18 | 2019-08-09 | 中国计量大学 | A kind of standard board manufacturing method compared for settled date mirror area gray scale detection |
| CN110108536B (en) * | 2019-06-18 | 2021-10-01 | 中国计量大学 | Standard plate manufacturing method for heliostat area gray level detection and comparison |
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