CN105184664A - Three-dimensional state evaluation and maintenance strategy of electric transmission and transformation equipment - Google Patents

Abstract

The present invention discloses a three-dimensional state evaluation and maintenance strategy of electric transmission and transformation equipment. The strategy comprises: firstly, evaluating the state of the electric transmission and transformation equipment according to existing electric transmission and transformation equipment state evaluation rules; secondly, evaluating the environment of the electric transmission and transformation equipment according to the analytic hierarchy process; thirdly, evaluating the importance of the electric transmission and transformation equipment according to the analytic hierarchy process; and finally, building a three-dimensional evaluation model to obtain a final evaluation result of the state of the electric transmission and transformation equipment. The present invention provides an evaluation algorithm of the importance of the electric transmission and transformation equipment and the influence of the environment on the state of the electric transmission and transformation equipment, the state of the electric transmission and transformation equipment itself, the state of the operating environment and the states of the power network and the social environment may be fully considered, and the thorough evaluation of the equipment maintenance schedule is performed, therefore the rationality of the equipment maintenance schedule is achieved.

Description

Power transmission and transforming equipment three-dimensional state is evaluated and Strategies of Maintenance

Technical field

The present invention relates to equipment state evaluation and Strategies of Maintenance field, particularly a kind of power transmission and transforming equipment three-dimensional state is evaluated and Strategies of Maintenance.

Background technology

Problem is both ways deposited in current power transmission and transformation equipment state evaluation: one is the quantity of state only considering equipment itself, as indexs such as equipment oil leakage, gas leakage, test figure exceed standard.And along with the development of economy of large scale construction and the continuous change of ecologic environment, external environment is on the impact of power transmission and transforming equipment, and equipment self importance all plays an important role to the evaluation that equipment state is final, only consider that the change of equipment oneself state amount accurately can not reflect actual conditions when carrying out state evaluation to equipment.Two is that maintenance suggestion in existing equipment state assessment guidelines does not judge the emergency degree of overhaul of the equipments.Such as, when two equipment are all cited as severe conditions, which equipment should first carry out which equipment of maintenance should after carry out maintenance and do not provide instruction.In view of above-mentioned two problems, the present invention proposes " three-dimensional " equipment state evaluation method simultaneously considering environment three aspect factor residing for equipment state, equipment importance, equipment.

To the evaluation of equipment state, the power transmission and transformation equipment state assessment guidelines that State Grid Corporation of China issues can be relied on.And environment there is no evaluation method at present residing for equipment importance and equipment.Questionnaire exposed installation mainly comprises electric pressure, equipment reliability, maintenance cost etc. for importance, mainly contains acid rain, atmospheric pollution, thunder and lightning, icing etc. to the environmental factor that power transmission and transforming equipment threatens.For considering that self and external environment are on the impact of power transmission and transforming equipment as far as possible, must each factor of scientific evaluation to power transmission and transforming equipment effect, thus objective appraisal is carried out to equipment, make rational power transmission and transforming equipment Strategies of Maintenance, in time power transmission and transforming equipment is safeguarded.Because above-mentioned factor is mostly uncertain index, be difficult to precise quantification, the present invention, on the basis building multi-layer criteria appraisement system, makes every effort to set up multifactor to power transmission and transforming equipment impact assessment model, thus formulates the reference frame that rational power transmission and transforming equipment Strategies of Maintenance provides science.

Summary of the invention

Object of the present invention is just to provide the evaluation of a kind of power transmission and transforming equipment three-dimensional state and Strategies of Maintenance, by proposing based on power transmission and transformation equipment state on the basis of analytical hierarchy process, importance, the power transmission and transformation equipment state overhauling Policy model of environmental factor three dimensions, provide the judge algorithm that power transmission and transforming equipment importance and environment affect the state of power transmission and transforming equipment, take into full account the state of power transmission and transforming equipment self, the state of running environment, the state of electrical network and social environment, comprehensive assessment is carried out to power transmission and transforming equipment turnaround plan, realize the rationality of power transmission and transforming equipment turnaround plan.

The object of the invention is by such technical scheme realize, it includes

1) according to existing power transmission and transformation equipment state assessment guidelines, power transmission and transformation equipment state is evaluated;

2) on analytical hierarchy process basis, environment residing for power transmission and transforming equipment is evaluated;

3) according to analytical hierarchy process, power transmission and transforming equipment importance is evaluated;

4) set up three-dimensional model, obtain power transmission and transformation equipment state final appraisal results and Strategies of Maintenance.

Further, describedly on analytical hierarchy process basis to the detailed process that environment residing for power transmission and transforming equipment is evaluated be:

1-1) set up set of factors U={U ₁..., U _m, wherein U ₁..., U _mby the sub-factors composition of many levels, set of factors U, according to the characteristics determined being evaluated objective system, has different Factor system for different objective system features;

1-2) set up fuzzy evaluation collection V={V ₁..., V _m, ground floor fuzzy evaluation collection: set up the judge collection V of environmental factor to power transmission and transforming equipment influence degree according to required _j=(j=1,2,3,4,5) totally 5 grades, respectively corresponding without impact, generally, more seriously, seriously, very serious 5 kinds of situations;

Environmental factor adopts ten point system to mark to the influence degree of power transmission and transforming equipment, and environmental factor corresponding membership function μ (x) the relation expression corresponding to power transmission and transforming equipment influence degree score value x is:

1-2-1) inessential situation V ₁:

Wherein, μ ₁when () represents that environmental factor is 0≤x≤4 to the scoring of power transmission and transforming equipment influence degree x, environmental factor does not affect power transmission and transforming equipment;

1-2-2) generalized case V ₂:

Wherein, μ ₂when () represents that the influence degree scoring of environmental factor to power transmission and transforming equipment is 2 < x≤6 x, environmental factor belongs to General Influence situation to power transmission and transforming equipment;

1-2-3) comparatively serious conditions V ₃:

Wherein, μ ₃when () represents that environmental factor is 4 < x≤8 to the scoring of the influence degree of power transmission and transforming equipment x, environmental factor belongs to power transmission and transforming equipment and comparatively has a strong impact on situation;

1-2-4) serious conditions V ₄:

Wherein, μ ₄when () represents that the influence degree scoring of environmental factor to power transmission and transforming equipment is 6 < x≤8 x, environmental factor belongs to power transmission and transforming equipment the situation of having a strong impact on;

1-2-5) very serious conditions V ₅:

Wherein, μ ₅when () represents that environmental factor is 8 < x≤10 to the scoring of the influence degree of power transmission and transforming equipment x, environmental factor belongs to power transmission and transforming equipment and has a strong impact on situation very much;

1-3) determine fuzzy matrix R: determine the relational matrix R=(r of factor U to fuzzy evaluation collection V _ij) _{m × n}, wherein r _ijrepresent that one of them factor of evaluation bottom i-th sub-factor is to evaluation V _jmembership;

1-4) determine the weight A={A of each Hierarchy Evaluation factor ₁..., A _m, wherein A ₁..., A _mbe made up of the sub-factor weight of many levels;

1-5) successively carry out fuzzy overall evaluation, final appraisal results are drawn: according to fuzzy data principle by maximum membership grade principle, from the bottom, this layer of each factor weight and fuzzy evaluating matrix are carried out fuzzyly exchange B=A ο R, be the fuzzy evaluating matrix of most last layer again with B, same blurring mapping is carried out to last layer, obtain fuzzy overall evaluation end product, again according to maximum membership grade principle, this result is processed further, obtain final appraisal results, and the evaluation result of power transmission and transforming equipment importance quantized, quantization method is as follows:

By the maximal value b selected by fuzzy overall evaluation _jsubstitute into V _jcorresponding degree of membership formula μ _jx, in (), anti-solution calculates prominence score x corresponding to maximal value _j, make R=10x _j, in order to measure power transmission and transforming equipment importance.

Further, describedly set up three-dimensional model, the concrete mode obtaining power transmission and transformation equipment state final appraisal results is:

First according to the analysis to power transmission and transformation equipment state, equipment importance, environmental factor three factors, corresponding evaluation result is provided; Wherein, power transmission and transformation equipment state evaluation result R ∈ [0,100], score value higher expression power transmission and transformation equipment state is poorer; Power transmission and transforming equipment Assessment of Important result H ∈ [0,100], score value higher expression power transmission and transforming equipment is more important; Environmental factor is to power transmission and transforming equipment impact assessment result Q ∈ [0,100], and the influence degree of score value higher expression environmental factor to power transmission and transforming equipment is larger;

On the basis of the above, mark in the importance of formulation equipment state and Strategies of Maintenance in conjunction with power transmission and transformation equipment state, importance, environmental factor three aspects, use analytical hierarchy process to calculate the weights W of power transmission and transformation equipment state, importance, environmental factor three aspects _r, W _h, W _q, due to different in the importance of different time phase three aspect factors, then corresponding weight also will recalculate, and to this, set up as drag:

Set up three orthogonal coordinate axis, be respectively R axle, H axle, Q axle, wherein R axle represents power transmission and transforming equipment importance, and it is more important to be worth larger explanation; H axle represents power transmission and transformation equipment state, and it is poorer to be worth larger explanation power transmission and transformation equipment state; Q axle represents environmental factor, and it is larger to be worth the impact of larger explanation environmental factor on power transmission and transforming equipment; The span of R axle, H axle, Q axle forms a rectangular parallelepiped in coordinate axis, rectangular parallelepiped top P point, what represent is that power transmission and transforming equipment is most important, power transmission and transformation state is the poorest, the equipment state that environment has the greatest impact to power transmission and transforming equipment, the pressing degree that this kind of power transmission and transformation equipment state needs repairing is higher, and when formulation state evaluation and Strategies of Maintenance, priority is the highest;

For power transmission and transforming equipment free position A (rW _r, hW _h, qW _q), if its distance P point is nearer, represent that maintenance pressing degree is higher, otherwise, then represent that maintenance pressing degree is lower, wherein initial point o is the point that power transmission and transforming equipment maintenance pressing degree is minimum, the pressing degree that power transmission and transforming equipment needs repairing is represented, for formulation equipment state evaluation and Strategies of Maintenance provide partitioning standards with the space length between A, P:

$\left|AP\right|=\sqrt{{(100-r)}^2{W_R}^2+{(100-h)}^2{W_H}^2+{(100-q)}^2{W_Q}^2}$

| the value of AP| is less, then represent that the pressing degree that power transmission and transforming equipment needs repairing is higher, otherwise the pressing degree needed repairing is lower.

Owing to have employed technique scheme, the present invention has following advantage:

(1) considered power transmission and transformation equipment state, importance, residing environment three aspect factor, evaluation result is more objective.

(2) utilize analytical hierarchy process, calculate easy, result is clear and definite, and combination of qualitative and quantitative analysis, preferably resolves the quantitative Comprehensive Evaluation Problem that power transmission and transforming equipment is affected by environment.

(3) pressing degree of Strategies of Maintenance is quantized, to the formulation of turnaround plan, there is certain guidance meaning.

Other advantages of the present invention, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, or can be instructed from the practice of the present invention.Target of the present invention and other advantages can be realized by instructions below and claims and be obtained.

Accompanying drawing explanation

Accompanying drawing of the present invention is described as follows.

Fig. 1 is process flow diagram of the present invention.

Fig. 2 is by being built three-dimensional model schematic diagram.

Embodiment

Below in conjunction with drawings and Examples, the invention will be further described.

Power transmission and transforming equipment triple assessment and Strategies of Maintenance concrete steps as follows:

1) according to existing power transmission and transformation equipment state assessment guidelines, power transmission and transformation equipment state is evaluated;

2) on analytical hierarchy process basis, environment residing for power transmission and transforming equipment is evaluated;

3) according to analytical hierarchy process, power transmission and transforming equipment importance is evaluated;

4) set up three-dimensional model, obtain power transmission and transformation equipment state final appraisal results and corresponding Strategies of Maintenance.

Describedly on analytical hierarchy process basis to the detailed process that environment residing for power transmission and transforming equipment is evaluated be:

1-1) set up set of factors U={U ₁, R, U _m, wherein U ₁, R, U _mby the sub-factors composition of many levels, set of factors U, according to the characteristics determined being evaluated objective system, has different Factor system for different objective system features;

1-2) set up fuzzy evaluation collection V={V ₁, R, V _m, ground floor fuzzy evaluation collection: set up the judge collection V of environmental factor to power transmission and transforming equipment influence degree according to required _j=(j=1,2,3,4,5) totally 5 grades, respectively corresponding without impact, generally, more seriously, seriously, very serious 5 kinds of situations;

Environmental factor adopts ten point system to mark to the influence degree of power transmission and transforming equipment, and environmental factor corresponding membership function μ (x) the relation expression corresponding to power transmission and transforming equipment influence degree score value x is:

1-2-1) inessential situation V ₁:

Wherein, μ ₁when () represents that environmental factor is 0≤x≤4 to the scoring of power transmission and transforming equipment influence degree x, environmental factor does not affect power transmission and transforming equipment;

1-2-2) generalized case V ₂:

Wherein, μ ₂when () represents that the influence degree scoring of environmental factor to power transmission and transforming equipment is 2 < x≤6 x, environmental factor belongs to General Influence situation to power transmission and transforming equipment;

1-2-3) comparatively serious conditions V ₃:

Wherein, μ ₃when () represents that environmental factor is 4 < x≤8 to the scoring of the influence degree of power transmission and transforming equipment x, environmental factor belongs to power transmission and transforming equipment and comparatively has a strong impact on situation;

1-2-4) serious conditions V ₄:

Wherein, μ ₄when () represents that the influence degree scoring of environmental factor to power transmission and transforming equipment is 6 < x≤8 x, environmental factor belongs to power transmission and transforming equipment the situation of having a strong impact on;

1-2-5) very serious conditions V ₅:

Wherein, μ ₅when () represents that environmental factor is 8 < x≤10 to the scoring of the influence degree of power transmission and transforming equipment x, environmental factor belongs to power transmission and transforming equipment and has a strong impact on situation very much;

1-3) determine fuzzy matrix R: determine the relational matrix R=(r of factor U to fuzzy evaluation collection V _ij) _{m × n}, wherein r _ijrepresent that one of them factor of evaluation bottom i-th sub-factor is to evaluation V _jmembership;

1-4) determine the weight A={A of each Hierarchy Evaluation factor ₁, valency, A _m, wherein A ₁, valency, A _mbe made up of the sub-factor weight of many levels;

1-5) successively carry out fuzzy overall evaluation, final appraisal results are drawn: according to fuzzy data principle by maximum membership grade principle, from the bottom, this layer of each factor weight and fuzzy evaluating matrix are carried out fuzzyly exchange B=A ο R, be the fuzzy evaluating matrix of most last layer again with B, same blurring mapping is carried out to last layer, obtain fuzzy overall evaluation end product, again according to maximum membership grade principle, this result is processed further, obtain final appraisal results, and the evaluation result of power transmission and transforming equipment importance quantized, quantization method is as follows:

By the maximal value b selected by fuzzy overall evaluation _jsubstitute into V _jcorresponding degree of membership formula μ _jx, in (), anti-solution calculates prominence score x corresponding to maximal value _j, make R=10x _j, in order to measure power transmission and transforming equipment importance.

Describedly set up three-dimensional model, the concrete mode obtaining power transmission and transformation equipment state final appraisal results is:

First according to the analysis to power transmission and transformation equipment state, equipment importance, environmental factor three factors, corresponding evaluation result is provided; Wherein, power transmission and transformation equipment state evaluation result R ∈ [0,100], score value higher expression power transmission and transformation equipment state is poorer; Power transmission and transforming equipment Assessment of Important result H ∈ [0,100], score value higher expression power transmission and transforming equipment is more important; Environmental factor is to power transmission and transforming equipment impact assessment result Q ∈ [0,100], and the influence degree of score value higher expression environmental factor to power transmission and transforming equipment is larger;

On the basis of the above, mark in the importance of formulation equipment state and Strategies of Maintenance in conjunction with power transmission and transformation equipment state, importance, environmental factor three aspects, use analytical hierarchy process to calculate the weights W of power transmission and transformation equipment state, importance, environmental factor three aspects _r, W _h, W _q, due to different in the importance of different time phase three aspect factors, then corresponding weight also will recalculate, and to this, set up as drag:

Set up three orthogonal coordinate axis, be respectively R axle, H axle, Q axle, wherein R axle represents power transmission and transforming equipment importance, and it is more important to be worth larger explanation; H axle represents power transmission and transformation equipment state, and it is poorer to be worth larger explanation power transmission and transformation equipment state; Q axle represents environmental factor, and it is larger to be worth the impact of larger explanation environmental factor on power transmission and transforming equipment; The span of R axle, H axle, Q axle forms a rectangular parallelepiped in coordinate axis, rectangular parallelepiped top P point, what represent is that power transmission and transforming equipment is most important, power transmission and transformation state is the poorest, the equipment state that environment has the greatest impact to power transmission and transforming equipment, the pressing degree that this kind of power transmission and transformation equipment state needs repairing is higher, and when formulation state evaluation and Strategies of Maintenance, priority is the highest;

For power transmission and transforming equipment free position A (rW _r, hW _h, qW _q), if its distance P point is nearer, represent that maintenance pressing degree is higher, otherwise, then represent that maintenance pressing degree is lower, wherein initial point o is the point that power transmission and transforming equipment maintenance pressing degree is minimum, the pressing degree that power transmission and transforming equipment needs repairing is represented, for formulation equipment state evaluation and Strategies of Maintenance provide partitioning standards with the space length between A, P:

$\left|AP\right|=\sqrt{{(100-r)}^2{W_R}^2+{(100-h)}^2{W_H}^2+{(100-q)}^2{W_Q}^2}$

| the value of AP| is less, then represent that the pressing degree that power transmission and transforming equipment needs repairing is higher, otherwise the pressing degree needed repairing is lower.

The ancient line circuit of wind choosing a 110kV below in conjunction with instantiation is described:

1, equipment state is evaluated:

According to Q/GDW173-2008 " overhead transmission line state evaluation directive/guide ", the ancient line gold utensil distortion of 110kV wind, affect electric property and physical strength, the slippage of part damper, deduct points 40 points, R=40, circuit is in severe conditions.

2, environment residing for equipment is evaluated:

1) set of factors is set up: power transmission and transforming equipment mainly affects by acid rain acid mist, atmospheric pollution, thunder and lightning, icing and social environmental factor in operational management, and above-mentioned each factor also comprises its sub-factor, as shown in table 1.

The environmental index of table 1 power transmission and transforming equipment

2) foundation of fuzzy evaluation collection: due to more multifactor can not quantitative test, therefore the present invention adopts the method establishment environmental factor of qualitative analysis to the fuzzy appraisal set of power transmission and transforming equipment influence degree.Ten point system is adopted to carry out expert analysis mode, if corresponding membership function μ (x) that environmental factor is corresponding to power transmission and transforming equipment influence degree score value x for environmental factor to power transmission and transforming equipment influence degree.

Table 2 power transmission and transforming equipment environmental factor single factor test grade form

3) foundation of fuzzy relation matrix: the present invention takes each Quadratic of the mode of expert analysis mode to acid rain acid mist, filth, thunder and lightning, icing and social environment five first class index to mark, and obtains the fuzzy judgment matrix of five first class index respectively:

As: each factor scores of the ancient line of 110kV wind brings 5 membership functions μ (x) into, obtains acid rain acid mist, filth, thunder and lightning, icing and social environment five fuzzy judgment matrix:

R ₁＝(r _ij) _1×5＝(1，0,0,0,0)

R ₂＝(r _ij) _1×5＝(1，0,0,0,0)

$R_3={\left(r_{\mathrm{ij}}\right)}_{3\&times;5}=\left(\begin{array}{ccccc}0& 0& 0.5& 0.5& 0\\ 0& 0& 0.5& 0.5& 0\\ 0& 0& 0.5& 0.5& 0\end{array}\right)$

$R_4={\left(r_{ij}\right)}_{2\&times;5}=\left(\begin{array}{ccccc}1& 0& 0& 0& 0\\ 1& 0& 0& 0& 0\end{array}\right)$

$R_5={\left(r_{ij}\right)}_{3\&times;5}=\left(\begin{array}{ccccc}0& 0& 1& 0& 0\\ 0.5& 0.5& 0& 0& 0\\ 1& 0& 0& 0& 0\end{array}\right)$

4) determine the weight of each layer factor of evaluation: according to judge, determine that these five environmental factors of acid rain acid mist, filthy situation, lightening activity situation, icing situation, social environment are on the weight in equipment impact, the ground floor U namely in multi-layer Fuzzy comprehensive evaluation ₁, U ₂, U ₃, U ₄, U ₅weight A=(a of four factors ₁, a ₂, a ₃, a ₄, a ₅).Computation process is as follows:

(1) acid rain acid mist, filthy situation, lightening activity situation, icing situation, these five environmental factors of social environment are carried out importance marking and compared, the assignment that significance level evaluates scale adopts 1,3,5,7 proportion quotiety, namely use 1,3,5,7 and reciprocal proportion compared with the importance of two factors, both 1 expressions are of equal importance, 3 represent that the former is more important a little than the latter, 5 represent that the former is more obvious than the latter important, and 7 represent that the former is than the latter and important, thus form judgment matrix.

The important ratio of the filthy situation of table 3, lightening activity situation, icing situation, social environment comparatively

(2) Maximum characteristic root λ is calculated according to above-mentioned judgment matrix _maxcorresponding maximal eigenvector required characteristic root is normalized the weight of namely trying to achieve five factors:

A＝(a ₁,a ₂,a ₃,a ₄,a ₅)＝(0.1,0.1,0.48,0.05,0.28)

(3) according to appeal method, calculate each two layers of index weights: according to table 4, table 5, table 6, calculate the weight of 5 two layers of indexs respectively, A ₁=1; A ₂=1; A ₃=(0.1,0.26,0.64); A ₄=(0.17,0.83); A ₅=(0.64,0.26,0.1).

Table 4 is that the sub-factor of lightening activity situation compares

Influence factor	Thunderstorm Day	Lightning strike density	Average thunder and lightning flow valuve
				Thunderstorm Day	1	1/5	1/3
Lightning strike density	5	1	5
				Average thunder and lightning flow valuve	3	1/5	1

Table 5 is comparisons of the sub-factor of icing situation

Influence factor	Icing day	Ice covering thickness
			Icing day	1	1/5
Ice covering thickness	5	1

Table 6 is comparisons of the sub-factor of social environment

5) fuzzy overall evaluation:

First evaluate sub-factor to the second layer to pass judgment on:

Calculate the evaluation result of acid rain acid mist, filthy situation, lightening activity situation, icing situation, social environment respectively:

B ₁＝A ₁·R ₁＝[b ₁₁,b ₁₂,b ₁₃,b ₁₄,b ₁₅]

B ₂＝A ₂·R ₂＝[b ₂₁,b ₂₂,b ₂₃,b ₂₄,b ₂₅]

B ₃＝A ₃·R ₃＝[b ₃₁,b ₃₂,b ₃₃,b ₃₄,b ₃₅]

B ₄＝A ₄·R ₄＝[b ₄₁,b ₄₂,b ₄₃,b ₄₄,b ₄₅]

B ₅＝A ₅·R ₅＝[b ₅₁,b ₅₂,b ₅₃,b ₅₄,b ₅₅]

Second layer evaluation basis is evaluated ground floor:

$B=A\&CenterDot;R=(a_1,a_2,a_3,a_4,a_5)\left[\begin{array}{c}{B}_1\\ B_2\\ B_3\\ B_4\\ B_5\end{array}\right]=\&lsqb;b_1,b_2,b_3,b_4,b_5\&rsqb;$

B＝(0.3144,0.0364,0.4192,0.025,0)

According to maximum membership grade principle, choose b _j=max [b ₁, b ₂, b ₃, b ₄, b ₅] corresponding to grade V _jas the comprehensive evaluation result of environmental factor to this line facility influence degree.In matrix B, maximal value is b ₃=0.4192, correspond to V ₃, therefore the impact of each environmental factor on circuit is more serious.Survey through actual, the ancient line present position of 110kV wind is comparatively frequent by lightening activity, and load is heavier, and environment is larger on its impact.Anti-solution calculates corresponding prominence score x _j.

3, equipment importance is evaluated:

Combined to produce by various kinds of equipment expert and actually determine the following factor affecting equipment importance: main electrical scheme, spacer units, electric pressure, device type, equipment reliability, maintenance of equipment cost, loss of outage.The evaluation method of environment residing for reference device is carried out marking to it and is calculated, and obtains H=51.4.

Table 7 equipment importance factor evaluation

With equipment importance correlative factor	Individual scores
		Main electrical scheme	3
Spacer units	1
		Electric pressure	3
Device type	3
		The reliability of equipment	7
Maintenance of equipment cost	4
		Loss of outage	6

The each factor of table 8 is to equipment importance impact assessment

4, three-dimensional model evaluation is utilized:

Analytical hierarchy process is utilized to obtain the weight of environment three factors residing for equipment state, equipment importance, equipment: (W _r, W _h, W _q)=(0.64,0.1,0.26), bring weight and R, H, Q tri-values into below formula and obtain final conclusion:

$\left|AP\right|=\sqrt{{(100-r)}^2{W}_R^2+{(100-h)}^2{W}_H^2+{(100-q)}^2{W}_Q^2}=40.9$

What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of the technical program, it all should be encompassed in the middle of right of the present invention.

Claims (3)

1. power transmission and transforming equipment three-dimensional state is evaluated and a Strategies of Maintenance, and it is characterized in that, concrete mode is as follows:

1) according to existing power transmission and transformation equipment state assessment guidelines, power transmission and transformation equipment state is evaluated;

2) on analytical hierarchy process basis, environment residing for power transmission and transforming equipment is evaluated;

3) according to analytical hierarchy process, power transmission and transforming equipment importance is evaluated;

4) set up three-dimensional model, obtain power transmission and transformation equipment state final appraisal results and Strategies of Maintenance.

2. a kind of power transmission and transforming equipment three-dimensional state as claimed in claim 1 is evaluated and Strategies of Maintenance, it is characterized in that, describedly on analytical hierarchy process basis to the detailed process that environment residing for power transmission and transforming equipment is evaluated is:

1-1) set up set of factors U={U ₁..., U _m, wherein U ₁..., U _mby the sub-factors composition of many levels, set of factors U, according to the characteristics determined being evaluated objective system, has different Factor system for different objective system features;

1-2) set up fuzzy evaluation collection V={V ₁..., V _m, ground floor fuzzy evaluation collection: set up the judge collection V of environmental factor to power transmission and transforming equipment influence degree according to required _j=(j=1,2,3,4,5) totally 5 grades, respectively corresponding without impact, generally, more seriously, seriously, very serious 5 kinds of situations;

Environmental factor adopts ten point system to mark to the influence degree of power transmission and transforming equipment, and environmental factor corresponding membership function μ (x) the relation expression corresponding to power transmission and transforming equipment influence degree score value x is:

1-2-1) inessential situation V ₁:

Wherein, μ ₁when () represents that environmental factor is 0≤x≤4 to the scoring of power transmission and transforming equipment influence degree x, environmental factor does not affect power transmission and transforming equipment;

1-2-2) generalized case V ₂:

Wherein, μ ₂when () represents that the influence degree scoring of environmental factor to power transmission and transforming equipment is 2 < x≤6 x, environmental factor belongs to General Influence situation to power transmission and transforming equipment;

1-2-3) comparatively serious conditions V ₃:

Wherein, μ ₃when () represents that environmental factor is 4 < x≤8 to the scoring of the influence degree of power transmission and transforming equipment x, environmental factor belongs to power transmission and transforming equipment and comparatively has a strong impact on situation;

1-2-4) serious conditions V ₄:

Wherein, μ ₄when () represents that the influence degree scoring of environmental factor to power transmission and transforming equipment is 6 < x≤8 x, environmental factor belongs to power transmission and transforming equipment the situation of having a strong impact on;

1-2-5) very serious conditions V ₅:

Wherein, μ ₅when () represents that environmental factor is 8 < x≤10 to the scoring of the influence degree of power transmission and transforming equipment x, environmental factor belongs to power transmission and transforming equipment and has a strong impact on situation very much;

1-3) determine fuzzy matrix R: determine the relational matrix R=(r of factor U to fuzzy evaluation collection V _ij) _{m × n}, wherein r _ijrepresent that one of them factor of evaluation bottom i-th sub-factor is to evaluation V _jmembership;

1-4) determine the weight A={A of each Hierarchy Evaluation factor ₁..., A _m, wherein A ₁..., A _mbe made up of the sub-factor weight of many levels;

1-5) successively carry out fuzzy overall evaluation, draw final appraisal results by maximum membership grade principle: according to fuzzy data principle, from the bottom, this layer of each factor weight and fuzzy evaluating matrix are carried out fuzzy exchange be the fuzzy evaluating matrix of most last layer again with B, same blurring mapping is carried out to last layer, obtain fuzzy overall evaluation end product, again according to maximum membership grade principle, this result is processed further, obtain final appraisal results, and the evaluation result of power transmission and transforming equipment importance quantized, quantization method is as follows:

By the maximal value b selected by fuzzy overall evaluation _jsubstitute into V _jcorresponding degree of membership formula μ _jx, in (), anti-solution calculates prominence score x corresponding to maximal value _j, make R=10x _j, in order to measure power transmission and transforming equipment importance.

3. a kind of power transmission and transforming equipment three-dimensional state as claimed in claim 1 is evaluated and Strategies of Maintenance, it is characterized in that, describedly sets up three-dimensional model, and the concrete mode obtaining power transmission and transformation equipment state final appraisal results and Strategies of Maintenance is:

First according to the analysis to power transmission and transformation equipment state, equipment importance, environmental factor three factors, corresponding evaluation result is provided; Wherein, power transmission and transformation equipment state evaluation result R ∈ [0,100], score value higher expression power transmission and transformation equipment state is poorer; Power transmission and transforming equipment Assessment of Important result H ∈ [0,100], score value higher expression power transmission and transforming equipment is more important; Environmental factor is to power transmission and transforming equipment impact assessment result Q ∈ [0,100], and the influence degree of score value higher expression environmental factor to power transmission and transforming equipment is larger;

On the basis of the above, mark in the importance of formulation equipment state and Strategies of Maintenance in conjunction with power transmission and transformation equipment state, importance, environmental factor three aspects, use analytical hierarchy process to calculate the weights W of power transmission and transformation equipment state, importance, environmental factor three aspects _r, W _h, W _q, due to different in the importance of different time phase three aspect factors, then corresponding weight also will recalculate, and to this, set up as drag:

Set up three orthogonal coordinate axis, be respectively R axle, H axle, Q axle, wherein R axle represents power transmission and transforming equipment importance, and it is more important to be worth larger explanation; H axle represents power transmission and transformation equipment state, and it is poorer to be worth larger explanation power transmission and transformation equipment state; Q axle represents environmental factor, and it is larger to be worth the impact of larger explanation environmental factor on power transmission and transforming equipment; The span of R axle, H axle, Q axle forms a rectangular parallelepiped in coordinate axis, rectangular parallelepiped top P point, what represent is that power transmission and transforming equipment is most important, power transmission and transformation state is the poorest, the equipment state that environment has the greatest impact to power transmission and transforming equipment, the pressing degree that this kind of power transmission and transformation equipment state needs repairing is higher, and when formulation state evaluation and Strategies of Maintenance, priority is the highest;

For power transmission and transforming equipment free position A (rW _r, hW _h, qW _q), if its distance P point is nearer, represent that maintenance pressing degree is higher, otherwise, then represent that maintenance pressing degree is lower, wherein initial point o is the point that power transmission and transforming equipment maintenance pressing degree is minimum, the pressing degree that power transmission and transforming equipment needs repairing is represented, for formulation equipment state evaluation and Strategies of Maintenance provide partitioning standards with the space length between A, P:

$\left|AP\right|=\sqrt{{(100-r)}^2{W_R}^2+{(100-h)}^2{W_H}^2+{(100-q)}^2{W_Q}^2}$

| the value of AP| is less, then represent that the pressing degree that power transmission and transforming equipment needs repairing is higher, otherwise the pressing degree needed repairing is lower.