CN107292497A - The flashover of power transmission circuit caused by windage yaw methods of risk assessment combined based on step analysis entropy weight - Google Patents
The flashover of power transmission circuit caused by windage yaw methods of risk assessment combined based on step analysis entropy weight Download PDFInfo
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Abstract
The invention discloses a kind of flashover of power transmission circuit caused by windage yaw methods of risk assessment combined based on step analysis entropy weight, including：S1, set up windage yaw discharge Risk Assessment Index System；S2, to evaluation index carry out subjective evaluation；S3, calculating evaluation index synthetic weights weight values；S4, assessment flashover of power transmission circuit caused by windage yaw risk.The present invention introduces the influence of meteorologic factor in flashover of power transmission circuit caused by windage yaw risk assessment, and binding hierarchy analytic approach and entropy assessment have carried out subjective and objective overall merit to the weighted value of evaluation index, and obtained assessment result is relatively accurate, comprehensive.
Description
Technical field
Prevented and reduced natural disasters field the invention belongs to power network, more particularly to a kind of power transmission line based on step analysis-entropy weight combination
Road windage yaw discharge methods of risk assessment.
Background technology
Overhead transmission line is influenceed by extraneous kinds of risks source so that insulator chain or wire jumper are tilted to shaft tower direction,
The air gap between wire and shaft tower is reduced, so as to produce windage yaw discharge risk.According to statistics, it is annual between 2013~2016 years
The total tripping times of circuit are respectively 1311,917,469,335 times, wherein, the number of times of line tripping is caused by windage yaw is discharged
143rd, 53,46,28 times, proportion is respectively 11.12%, 5.78%, 9.81%, 8.36%.As can be seen here, each Nian Youfeng
The tripping fault that inclined flashover triggers occupies certain proportion, there is larger hidden danger to power grid security.
Power network windage yaw discharge risk is reduced, the windage yaw discharge risk that overhead transmission line need to occur carries out effective comment
Estimate.At present, the main cause for causing flashover of power transmission circuit caused by windage yaw summed up has：(1) effect of the meteorologic parameter such as high wind；(2)
The selection of parameter and the consume of itself component etc. in pole and tower design code；(3) under harsh weather, the influence of external orographic condition
Deng.But the existing research for flashover of power transmission circuit caused by windage yaw methods of risk assessment, only consider shadow of the wind speed to wire wind load
Ring, effect of the meteorologic factors such as temperature, humidity to line load is have ignored mostly, obtained assessment, which is combined, lacks reliability；This
Outside, when carrying out risk assessment individually with analytic hierarchy process (AHP) or entropy assessment, the actual significance level and meaning of index can not be accurate
True expresses.
The content of the invention
The present invention sets up windage yaw discharge risk assessment index from the risk source of analyzing influence flashover of power transmission circuit caused by windage yaw
System, completes the assessment of flashover of power transmission circuit caused by windage yaw risk, and give specific wind using the method for step analysis-entropy weight combination
Dangerous grade.
The technical solution adopted for the present invention to solve the technical problems is：
The present invention provides a kind of flashover of power transmission circuit caused by windage yaw methods of risk assessment based on step analysis-entropy weight combination, bag
Include following steps：
S1, set up windage yaw discharge Risk Assessment Index System；
S2, to evaluation index carry out subjective evaluation；
S3, calculating evaluation index synthetic weights weight values；
S4, assessment flashover of power transmission circuit caused by windage yaw risk.
Further, in step S1 of the invention windage yaw discharge risk assessment index include meteorologic parameter (wind speed, wind direction,
Rainfall, humidity and temperature), shaft tower parameter (tower, insulator type and cross-arm type) and orographic condition (Plain, basin,
Plateau, mountain region and hills).
Further, subjective weight of the expert to evaluation index is determined using analytic hierarchy process (AHP) in step S2 of the invention,
And the objective weight of expert opinion itself is determined using entropy assessment.
Further, assessment windage yaw discharge risk integrative weight P calculation formula is in step S3 of the invention：
P=W × Q
In formula, W is subjective weight matrix of the expert to evaluation index, W=[W1,W2,…,Wm]；Q is expert opinion itself
Objective weight matrix, Q=[q1,q2,…,qm]T, T is vector or the transposition symbol of matrix.
Further, flashover of power transmission circuit caused by windage yaw risk r is represented by step S4 of the invention：
R=P × F
In formula, F is the probability matrix that evaluation index occurs.
The present invention is by from meteorologic parameter, three aspects of shaft tower parameter and orographic condition, analyzing influence transmission line of electricity
The risk source of windage yaw discharge, and set up the windage yaw discharge Risk Assessment Index System analyzed based on multi-risk System source.On this basis,
Windage yaw discharge risk assessment comprehensive weight is determined using the method for step analysis-entropy weight combination, power transmission circuit caused by windage is finally completed
The division of flashover risk class, the windproof transformation available for the anti-storm design and differentiation for instructing electric power line pole tower.
Brief description of the drawings
Fig. 1 is the flow of flashover of power transmission circuit caused by windage yaw methods of risk assessment of the present invention based on step analysis-entropy weight combination
Figure；
Fig. 2 is the flashover of power transmission circuit caused by windage yaw Risk Assessment Index System that the present invention is set up.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
As shown in figure 1, in one particular embodiment of the present invention, being completed using the method for step analysis-entropy weight combination
The calculating of evaluation index comprehensive weight, finally realizes the assessment of flashover of power transmission circuit caused by windage yaw risk, specifically includes following steps：
S1, respectively in terms of meteorologic parameter, shaft tower parameter and terrain parameter three, set up transmission of electricity as shown in Figure 2
Circuit windage yaw discharge Risk Assessment Index System；
Expert's number that S2, hypothesis participate in evaluating is m, and the evaluation index quantity of selection is n, is determined using analytic hierarchy process (AHP)
Expert is designated as W=[W to the subjective weight matrix of evaluation index1,W2,…,Wm], and expert opinion itself is determined using entropy assessment
Objective weight matrix, be designated as Q=[q1,q2,…,qm]T, T is vector or the transposition symbol of matrix.
W in subjective weight matrix Wj(1≤j≤m) be jth position expert to the subjective weight of n evaluation index of selection to
Measure, calculation process is：
1) judgment matrix C of the jth position expert to n evaluation index is determined by 1~9 scaling law；
2) judgment matrix C characteristic vector is calculatedAnd characteristic value
3) coincident indicator CI is calculated
In formula, λmaxFor judgment matrix C eigenvalue of maximum.
4) Consistency Ratio CR is calculated
In formula, RI is the corresponding average homogeneity index of n rank matrixes.
If 5) CR<0.1, then show that judgment matrix C, by consistency check, turns to step 6)；Otherwise step 1 is turned to),
Reconfigure judgment matrix C；
6) to characteristic vectorIt is normalized and can obtain Wj, it is designated as Wj=[w1j, w2j..., wnj]T。
Wherein, wijSubjective weight of the jth position expert to i-th of risk indicator is represented, is met：
In formula, 0<wji<1, i=1,2 ..., n；J=1,2 ..., m.
Q in objective weight matrix QjIt is jth position expert's weight of itself when doing metrics evaluation, calculation process is：
1) expert opinion level matrix E is calculated；
E=[E1,E2,…,Em]
Wherein, EjBe jth position expert to the evaluation horizontal vector of n evaluation index, be designated as
Ej=[e1j,e2j,…,enj]T
In formula, eijRepresent that jth position expert judges the level of result to i-th of evaluation index, has
Wherein
2) according to expert opinion level, following expert opinion entropy model is set up：
3) entropy of jth position expert is calculated；
4) jth position expert weight q of itself when doing metrics evaluation is calculatedj。
S3, for n index of the flashover of power transmission circuit caused by windage yaw risk assessment chosen, the comprehensive weight finally calculated can
It is designated as P=[p1,p2,…,pn]T, its calculation formula is：
P=W × Q
In formula, piTo calculate the synthetic weights of i-th obtained of Risk Evaluation Factors using step analysis-entropy weight combined method
Weight, has：
In formula, 0<pi<1, and meet
S4, using electric power line pole tower as object, calculate assess the period in each evaluation index occur probability fi,
Remember F=[f1, f2,…,fn]T, then the windage yaw discharge risk of the shaft tower be：
R=P × F
The assessment of windage yaw discharge risk is completed by base shaft tower, you can complete commenting for whole piece flashover of power transmission circuit caused by windage yaw risk
Estimate.
Claims (6)
1. a kind of flashover of power transmission circuit caused by windage yaw methods of risk assessment based on step analysis-entropy weight combination, it is characterised in that including
Following steps：
S1, set up windage yaw discharge Risk Assessment Index System；
S2, to evaluation index carry out subjective evaluation；
S3, calculating evaluation index synthetic weights weight values；
S4, assessment flashover of power transmission circuit caused by windage yaw risk.
2. the flashover of power transmission circuit caused by windage yaw methods of risk assessment according to claim 1 based on step analysis-entropy weight combination,
Characterized in that, the windage yaw discharge risk assessment index in step S1 includes meteorologic parameter, shaft tower parameter and orographic condition.
3. the flashover of power transmission circuit caused by windage yaw methods of risk assessment according to claim 2 based on step analysis-entropy weight combination,
Characterized in that, the meteorologic parameter include wind speed, wind direction, rainfall, humidity and temperature, the shaft tower parameter include tower,
Insulator type and cross-arm type, the orographic condition include Plain, basin, plateau, mountain region and hills.
4. the flashover of power transmission circuit caused by windage yaw methods of risk assessment according to claim 1 based on step analysis-entropy weight combination,
Characterized in that, subjective weight of the expert to evaluation index is determined using analytic hierarchy process (AHP) in step S2, and it is true using entropy assessment
Determine the objective weight of expert opinion itself.
5. the flashover of power transmission circuit caused by windage yaw methods of risk assessment according to claim 1 based on step analysis-entropy weight combination,
Characterized in that, the calculation formula that windage yaw discharge risk integrative weight P is assessed in step S3 is：
P=W × Q
In formula, W is subjective weight matrix of the expert to evaluation index；Q is the objective weight matrix of expert opinion itself.
6. the flashover of power transmission circuit caused by windage yaw methods of risk assessment according to claim 5 based on step analysis-entropy weight combination,
Characterized in that, flashover of power transmission circuit caused by windage yaw risk r is expressed as in step S4：
R=P × F
In formula, F is the probability matrix that evaluation index occurs.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108008252A (en) * | 2017-11-29 | 2018-05-08 | 广东电网有限责任公司电力科学研究院 | A kind of transmission line malfunction type diagnostic method and apparatus |
| CN109242306A (en) * | 2018-09-04 | 2019-01-18 | 深圳市城市公共安全技术研究院有限公司 | Safety production risk assessment method and system based on multilevel gray correlation analysis |
| CN110544034A (en) * | 2019-08-29 | 2019-12-06 | 贵州电网有限责任公司输电运行检修分公司 | power transmission line cross-over risk assessment method |
| CN110659814A (en) * | 2019-09-12 | 2020-01-07 | 国网山东省电力公司寿光市供电公司 | Power grid operation risk evaluation method and system based on entropy weight method |
| CN112257028A (en) * | 2020-10-16 | 2021-01-22 | 广东电网有限责任公司 | Windage yaw flashover fault probability calculation method and device of power transmission line |
| CN112365123A (en) * | 2020-10-14 | 2021-02-12 | 北京信息科技大学 | Risk analysis method and device in low-water footprint product authentication process |
| CN113077145A (en) * | 2021-03-31 | 2021-07-06 | 国网新疆电力有限公司电力科学研究院 | Multi-dimensional meteorological environment chatter shedding risk assessment method for high-speed rail-crossing power transmission line |
| CN113092960A (en) * | 2021-03-31 | 2021-07-09 | 广东电网有限责任公司清远供电局 | Insulator icing flashover monitoring method, device, equipment and storage medium |
| CN114118665A (en) * | 2021-08-05 | 2022-03-01 | 华信咨询设计研究院有限公司 | Design institute-oriented EPC risk evaluation method based on entropy weight FAHP |
| CN116362631A (en) * | 2023-06-02 | 2023-06-30 | 国网安徽省电力有限公司经济技术研究院 | DC power distribution network operation safety evaluation system based on big data |
| CN117114428A (en) * | 2023-10-25 | 2023-11-24 | 国网山西省电力公司电力科学研究院 | Meteorological disaster analysis and early warning method for power equipment |
| WO2024093468A1 (en) * | 2022-11-04 | 2024-05-10 | 国网山东省电力公司电力科学研究院 | Risk evaluation method and system for windage yaw flashover, device, and readable storage medium |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108008252A (en) * | 2017-11-29 | 2018-05-08 | 广东电网有限责任公司电力科学研究院 | A kind of transmission line malfunction type diagnostic method and apparatus |
| CN108008252B (en) * | 2017-11-29 | 2020-04-17 | 广东电网有限责任公司电力科学研究院 | Power transmission line fault type diagnosis method and device |
| CN109242306A (en) * | 2018-09-04 | 2019-01-18 | 深圳市城市公共安全技术研究院有限公司 | Safety production risk assessment method and system based on multilevel gray correlation analysis |
| CN110544034A (en) * | 2019-08-29 | 2019-12-06 | 贵州电网有限责任公司输电运行检修分公司 | power transmission line cross-over risk assessment method |
| CN110659814A (en) * | 2019-09-12 | 2020-01-07 | 国网山东省电力公司寿光市供电公司 | Power grid operation risk evaluation method and system based on entropy weight method |
| CN112365123A (en) * | 2020-10-14 | 2021-02-12 | 北京信息科技大学 | Risk analysis method and device in low-water footprint product authentication process |
| CN112257028A (en) * | 2020-10-16 | 2021-01-22 | 广东电网有限责任公司 | Windage yaw flashover fault probability calculation method and device of power transmission line |
| CN112257028B (en) * | 2020-10-16 | 2022-11-29 | 广东电网有限责任公司 | Windage yaw flashover fault probability calculation method and device of power transmission line |
| CN113092960A (en) * | 2021-03-31 | 2021-07-09 | 广东电网有限责任公司清远供电局 | Insulator icing flashover monitoring method, device, equipment and storage medium |
| CN113077145B (en) * | 2021-03-31 | 2022-06-24 | 国网新疆电力有限公司电力科学研究院 | Multi-dimensional meteorological environment chatter shedding risk assessment method for high-speed rail-crossing power transmission line |
| CN113077145A (en) * | 2021-03-31 | 2021-07-06 | 国网新疆电力有限公司电力科学研究院 | Multi-dimensional meteorological environment chatter shedding risk assessment method for high-speed rail-crossing power transmission line |
| CN114118665A (en) * | 2021-08-05 | 2022-03-01 | 华信咨询设计研究院有限公司 | Design institute-oriented EPC risk evaluation method based on entropy weight FAHP |
| WO2024093468A1 (en) * | 2022-11-04 | 2024-05-10 | 国网山东省电力公司电力科学研究院 | Risk evaluation method and system for windage yaw flashover, device, and readable storage medium |
| CN116362631A (en) * | 2023-06-02 | 2023-06-30 | 国网安徽省电力有限公司经济技术研究院 | DC power distribution network operation safety evaluation system based on big data |
| CN116362631B (en) * | 2023-06-02 | 2023-08-11 | 国网安徽省电力有限公司经济技术研究院 | DC power distribution network operation safety evaluation system based on big data |
| CN117114428A (en) * | 2023-10-25 | 2023-11-24 | 国网山西省电力公司电力科学研究院 | Meteorological disaster analysis and early warning method for power equipment |
| CN117114428B (en) * | 2023-10-25 | 2024-01-30 | 国网山西省电力公司电力科学研究院 | Meteorological disaster analysis and early warning method for power equipment |
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