CN103245761B - A kind of method dividing dirty district grade with contamination speed - Google Patents
A kind of method dividing dirty district grade with contamination speed Download PDFInfo
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- CN103245761B CN103245761B CN201310157248.4A CN201310157248A CN103245761B CN 103245761 B CN103245761 B CN 103245761B CN 201310157248 A CN201310157248 A CN 201310157248A CN 103245761 B CN103245761 B CN 103245761B
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Abstract
The invention discloses a kind of method dividing dirty district grade with contamination speed, comprise the steps: that (1) installs external insulation equipment contamination measuring device; (2) contamination measuring device is arranged; (3) external insulation equipment surface contamination amount and the external insulation equipment in final some moment of the contamination surface contamination amount in starting point moment contamination phase is recorded, detection limit is that salt is close, ash is close or the density of certain material, and records the time interval in described starting point moment contamination phase and final some moment of contamination; (4) the external insulation equipment contamination speed in the contamination phase is calculated; (5) add up contamination speed, ask for average contamination speed; (6) the zone leveling contamination speed of each department is asked; (7) the average contamination rate distribution in zoning scope; (8) calculate the division parameter K of dirty district, each department grade, divide dirty district grade according to the scope of K value.Have that dynamically to divide dirty district grade, prediction future time contamination amount and measuring period short and calculate the advantages such as easy.
Description
Technical field
The present invention relates to a kind of power transmission and transformation external insulation equipment dirty district grade classification technology, a kind of particularly method dividing dirty district grade with contamination speed.
Background technology
Pollution flashover accident has that influence area is large, power off time is long, place tripping operation often makes to close on power transmission and transforming equipment by involving the features such as action, the economic loss that causes are large, is power external insulation equipment normal operation, threatening greatly of electric power netting safe running.Domestic and international research shows, the contamination order of severity according to external insulation configures suitable dielectric level, can effectively prevent pollution flashover accident from occurring.Therefore, the classifying rationally of external insulation dirty district grade is particularly important to the work of electrical network antifouling work, can be newly-built line design external insulation level, existing circuit carries out that planned tune is climbed, operation department implements specific aim Flash Decontamination Measurements etc. provides scientific basis.
At present, China's Main Basis " high-tension overhead line and send out, the dirt of electric substation environment distinguishes level and external insulation choice criteria " divides dirty district grade.Overhead transmission line and electric substation, generating plant from, weather condition and equivalent salt deposit density, are divided into different gradation for surface pollution according to filthy character, dirty spacing by this standard.After research and propose and replace annual equivalent salt density with saturated salt density, to ensureing circuit not clean for a long time without pollution flashover.
But the positive high speed development of current China economy, energy structure based on coal, the Large-scale Migration of contaminated industry, highway extend the automobile exhaust pollution that brings everywhere and the abnormal extreme weather caused of global climate is multiple, power external insulation equipment contamination amount is all made to occur significantly dynamic change, pollution range constantly changes, and dirty district grade also presents dynamic variation characteristic.Therefore the method for tradition division dirty district grade rests on the static description contamination order of severity stage, each measurement adjustment required time is long, manpower and materials cost is large, often lag behind the dynamic change of regional contamination accumulation characteristics, cause being difficult to the current external insulation contamination degree in accurate characterization each department, and the prediction of the following contamination amount of external insulation equipment can not be realized.
Summary of the invention
The object of the invention is to overcome the shortcoming of prior art and deficiency, a kind of method dividing dirty district grade with contamination speed is provided, the method dynamically describes the contamination order of severity of different regions insulator arrangement, and predicts the contamination amount of different time in the external insulation equipment contamination phase.
Object of the present invention is achieved through the following technical solutions:
Divide a method for dirty district grade with contamination speed, can comprise the steps:
(1) choose multiple representative check point in each area, the power transmission and transformation external insulation equipment of check point is installed external insulation equipment contamination measuring device;
(2) set contamination measuring device one rainfall event finish time with on once rainfall start time (i.e. the starting point of contamination phase and the terminal of contamination phase) measures the surperficial contamination amount of external insulation equipment;
(3) each starting point contamination phase, external insulation equipment moment surface contamination amount m1 contamination amount m2 surperficial with terminal moment external insulation equipment that contamination measuring device records is recorded, and the time interval t of twice measurement, physical quantity m1 and the m2 that contamination measuring device detects can be, and salt is close, ash is close or the density of certain material;
(4) the contamination speed S of each check point external insulation equipment within a contamination phase is calculated:
S＝﹙m2－m1﹚÷t；
(5) the contamination speed of external insulation equipment all contamination phases in certain hour section of each check point is added up, the all contamination speed Ss of each check point within this time period are asked for arithmetical mean or ask for weighted mean according to the length of corresponding contamination phase, obtains the average contamination speed Sp of each check point external insulation equipment in this time period;
(6) the average contamination speed of each area all check points within the above time period is added up, arithmetical mean asked for the average contamination speed Sp of all check points in somewhere or asks for weighted mean according to the significance level of this check point in regional power grid safe operation, trying 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, and Sdmin is minimum value;
(8) calculate the division parameter K:K=﹙ Sd-Sdmin ﹚ ÷ R of dirty district, each department grade, divide dirty district grade (as shown in table 1, to be dirty district grade classification table) according to the scope of K value:
| K value scope | Dirty district grade |
| 0.8≤K≤1 | I grade, contamination speed is fast especially |
| 0.6≤K＜0.8 | II grade, contamination speed is very fast |
| 0.4≤K＜0.6 | III grade, contamination speed is general |
| 0.2≤K＜0.4 | IV grade, contamination speed is slower |
| 0≤K＜0.2 | V grade, contamination speed is slow |
Table 1
Complete and effective contamination phase refers to from a rainfall and terminates to the process rainfall next time.
Calculating average contamination speed can with different time length such as the previous year, the front first quarter or the previous moons for benchmark, obtain annual contamination speed, season average contamination speed, monthly average contamination speed etc., call the historical data of record at any time, the dirty district grade of each department can be adjusted in real time.
Factors vary affect external insulation equipment contamination amount due to somewhere filthy feature and weather condition etc. within the period of one not long is little, and the zone leveling contamination speed Sd therefore continuing detection acquisition can the dynamic characterization this area external insulation equipment contamination order of severity in a short time.
In conjunction with the current contamination amount PN measured by 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, the contamination amount PF after this check point certain hour section T in the contamination phase can be predicted:
PF=PN+Sp × T or PF=PN+Sd × T.
Principle of work of the present invention: the present invention is to divide dirty district grade with power external insulation contamination speed, multiple representative check point is chosen in each area, the power external insulation equipment of check point is installed contamination measurement mechanism, be set in a rainfall terminate after and rainfall next time start the first two time point (i.e. the Origin And Destination of contamination phase) and measure, measure contamination amount m1 and the m2 of gained and the time interval (the i.e. contamination phase length) t of twice measurement twice before and after record, calculate the contamination speed S of a contamination phase; Collect the average contamination speed Sp calculating each check point external insulation equipment in certain hour section; The zone leveling contamination speed Sd of statistical computation each department within the above-mentioned time period again; The dirty district grade classification parameter K of statistical computation each department, divides dirty district grade on this basis.The invention solves existing division dirty district rank method and staticly can only describe each region power equipment contamination order of severity, measuring period is long, and lag behind environmental pollution, meteorological condition change, and each problem adjusting dirty district grade and need to spend a large amount of manpower and materials to redeterminate, and algorithm simple, be easy to grasp, the contamination amount of Accurate Prediction external insulation equipment at future time can be realized, for electric power O&M department provides the antifouling work decision-making foundation comparatively meeting contamination present situation.
The present invention has following advantage and effect relative to prior art:
1, the invention solves tradition divide dirty district rank method can only the static problem describing the different regions power external insulation equipment contamination order of severity, make that power external insulation dirty district grade classification can be moved with pollution source, pollution range changes, the change of weather instability and dynamic conditioning;
2, the invention solves tradition division dirty district rank method needs measurement data to be for many years foundation, implementation cycle is long, lag behind the problem of pollution source and pollution range change, climate change, the implementation cycle dividing dirty district grade is shortened greatly, and implementation cycle flexibly changing;
3, the present invention can to predict within the contamination phase point sometime perspectively, and the contamination amount of power external insulation equipment, makes the power external insulation contamination amount according to real-time estimate, implements cleaning, adjusts and the suitably Flash Decontamination Measurements such as to climb and become possibility;
4, computing method of the present invention are simple, are easy to grasp, and are convenient to promote
Accompanying drawing explanation
Fig. 1 is that the present invention divides the process flow diagram of dirty district rank method with contamination speed.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1, the present invention divides the method for dirty district grade with contamination speed, is realized by following step:
(1) choose multiple representative check point in each area, the power transmission and transformation external insulation equipment of check point is installed external insulation equipment contamination measuring device;
(2) set external insulation equipment contamination measuring device one rainfall event finish time with on once rainfall start time (i.e. the starting point of contamination phase and the terminal of contamination phase) measures the surperficial contamination amount of external insulation equipment;
(3) each starting point contamination phase, external insulation equipment moment surface contamination amount m1 contamination amount m2 surperficial with terminal moment external insulation equipment that contamination measuring device records is recorded, and the time interval t of twice measurement.Physical quantity m1 and the m2 that contamination measuring device detects can be that salt is close, the density of close or certain material of ash, if the salt detecting external insulation equipment surface is close, then divide dirty district grade according to the dirty speed of salt close packing, and in the measurable contamination phase, the close amount of salt on external insulation equipment surface, if detect other physical quantity in like manner, also can consider multiple physical quantity as divide dirty district grade according to and predict contamination amount total in the contamination phase;
(4) the contamination speed S of each check point external insulation equipment within a contamination phase is calculated:
S＝﹙m2－m1﹚÷t；
(5) the contamination speed of external insulation equipment all contamination phases in certain hour section of each check point is added up, the all contamination speed Ss of each check point within this time period are asked for arithmetical mean or ask for weighted mean according to the length of corresponding contamination phase, obtains the average contamination speed Sp of each check point external insulation equipment in this time period;
(6) the average contamination speed of each area all check points within the above time period is added up, arithmetical mean asked for the average contamination speed Sp of all check points in somewhere or asks for weighted mean according to the significance level of this check point in regional power grid safe operation, trying 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, and Sdmin is minimum value;
(8) calculate the division parameter K:K=﹙ Sd-Sdmin ﹚ ÷ R of dirty district, each department grade, divide dirty district grade (as shown in table 1, to be dirty district grade classification table) according to the scope of K value:
| K value scope | Dirty district grade |
| 0.8≤K≤1 | I grade, contamination speed is fast especially |
| 0.6≤K＜0.8 | II grade, contamination speed is very fast |
| 0.4≤K＜0.6 | III grade, contamination speed is general |
| 0.2≤K＜0.4 | IV grade, contamination speed is slower |
| 0≤K＜0.2 | V grade, contamination speed is slow |
Table 1
Complete and effective contamination phase refers to from a rainfall and terminates to the process rainfall next time.
Calculating average contamination speed can with different time length such as the previous year, the front first quarter or the previous moons for benchmark, obtain annual contamination speed, season average contamination speed, monthly average contamination speed etc., call the historical data of record at any time, the dirty district grade of each department can be adjusted in real time.
Factors vary affect external insulation equipment contamination amount due to somewhere filthy feature and weather condition etc. within the period of one not long is little, and the zone leveling contamination speed Sd therefore continuing detection acquisition can the dynamic characterization this area external insulation equipment contamination order of severity in a short time.
In conjunction with the current contamination amount PN measured by 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, the contamination amount PF after this check point certain hour section T in the contamination phase can be predicted:
PF=PN+Sp × T or PF=PN+Sd × T.
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (7)
1. divide a method for dirty district grade with contamination speed, it is characterized in that, comprise the steps:
(1) choose multiple representative check point in each area, the power transmission and transformation external insulation equipment of check point is installed external insulation equipment contamination measuring device;
(2) set contamination measuring device one rainfall event finish time with on once rainfall start time respectively measures an external insulation equipment surface contamination amount;
(3) external insulation equipment surface contamination amount m1 and the external insulation equipment in final some moment of the contamination surface contamination amount m2 in starting point moment contamination phase that described contamination measuring device records is recorded, the physical quantity that contamination measuring device detects can be that salt is close, the density of close or certain material of ash, and records the time interval t in described starting point moment contamination phase and final some moment of contamination;
(4) the contamination speed S of each check point external insulation equipment within a contamination phase is calculated:
S＝﹙m2－m1﹚÷t，
Contamination speed S is the increment of a contamination interim external insulation equipment surface contamination amount and the business of contamination phase time span;
(5) the contamination speed of external insulation equipment all contamination phases in certain hour section of each check point is added up, the all contamination speed Ss of each check point within the above time period are asked for arithmetical mean or ask for weighted mean according to the length of corresponding contamination phase, obtain in the above time period, the average contamination speed Sp of each check point external insulation equipment;
(6) the average contamination speed of each area all check points within the above time period is added up, arithmetical mean asked for the average contamination speed Sp of all check points in somewhere or asks for weighted mean according to the significance level of this check point in regional power grid safe operation, trying 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, and Sdmin is minimum value;
(8) calculate the division parameter K:K=﹙ Sd-Sdmin ﹚ ÷ R of dirty district, each department grade, divide dirty district grade according to the scope of K value.
2. the method dividing dirty district grade with contamination speed according to claim 1, is characterized in that: in described step (2), terminates to the process rainfall next time from last rainfall, is complete and effective contamination phase.
3. the method dividing dirty district grade with contamination speed according to claim 1, it is characterized in that: in described step (5), the calculating of average contamination speed with the previous year, the front first quarter or the previous moon different time length for benchmark, calculate annual contamination speed, season average contamination speed, monthly average contamination speed, call the historical data of record at any time, in real time the dirty district grade of adjustment each department.
4. the method dividing dirty district grade with contamination speed according to claim 1, is characterized in that: adopt the zone leveling contamination speed Sd detecting acquisition dynamically to represent this area's external insulation equipment contamination order of severity in a short time in step (6).
5. the method dividing dirty district grade with contamination speed according to claim 1, it is characterized in that: in conjunction with the current contamination amount PN measured by 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 after this check point certain hour section T in the contamination phase.
6. the method dividing dirty district grade with contamination speed according to claim 5, is characterized in that: the formula calculating described contamination amount PF is as follows:
PF＝PN+Sp×T，
Prediction contamination amount PF after 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. the method dividing dirty district grade with contamination speed according to claim 5, is characterized in that: the formula calculating described contamination amount PF is as follows:
PF＝PN+Sd×T，
Prediction contamination amount PF after 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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| 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 |
| 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 |
| 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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