CN104036433A - Method for evaluating running management level of power distribution network - Google Patents

Abstract

The invention discloses a method for evaluating the running management level of a power distribution network. The method comprises the following steps of: A, analysing factors influencing power distribution network effect indexes and the like, and determining the index with the maximum influence on the power supply reliability of the power distribution network; B, determining a calculation formula for each index in the step A; C, evaluating each index weight of the index system in the step A through mathematical calculation by virtue of a triangular fuzzy analytic hierarchy method; D, obtaining each index weight by virtue of the resolution in the step C. According to the method, by scientifically and accurately evaluating the running management level of the power distribution network, establishment for the comprehensive index system of the power distribution network is enriched, and the safe and stable running of the power distribution network in China is promoted.

Description

A kind of power distribution network operation and management level evaluation method

Technical field

The present invention relates to field of power distribution, relate in particular to a kind of power distribution network operation and management level evaluation method.

Background technology

In recent years, research and the construction upsurge of intelligent grid in global range, have been started." building strong intelligent grid " strategic objective proposing around State Grid Corporation of China, China has carried out various places the construction of a large amount of intelligent grid pilot project, and wherein comparatively ripe pilot project comprises intelligent substation, power distribution automation and power information acquisition system etc.

As the important component part of electrical network, the intellectuality of power distribution network has become the new trend of following power network development, has very important effect for the overall goals that realizes intelligent grid construction.Therefore, realize the evaluation to intelligent distribution network, have very important meaning.And the current power distribution network operation and management level evaluation method that not yet has science.

Summary of the invention

The object of this invention is to provide a kind of power distribution network operation and management level evaluation method, can by power distribution network operation and management level the science of carrying out assess exactly, enrich the foundation of power distribution network synthesis index system, be conducive to China's power distribution network and move with security and stability.

The present invention adopts following technical proposals:

A kind of power distribution network operation and management level evaluation method, comprises the following steps:

A: the factor that affects power distribution network effect class index is analyzed, determined that the effect class index associated with operation and management level is power distribution network power supply reliability, and definite power distribution network operation and management level index that power distribution network power supply reliability is had the greatest impact;

Wherein, the index that operation and management level has the greatest impact to power distribution network power supply reliability is PMS system distribution data integrity, significant deficiency defect elimination rate, temporary interruption ratio, hot line job rate and power failure operation telegram in reply rate on time;

B: the computing formula of each index in determining step A respectively;

Wherein, PMS system distribution data integrity refers to the ratio of all distribution net equipment sums within the scope of distribution net equipment in Style Product Information Management System and region O&M, and the computing formula of PMS system distribution data integrity is

In above formula, on-pole switch kind equipment comprises isolating switch, on-load switch, disconnector and fuse, distribution overhead transmission line, cable line, pole type transformer, on-pole switch kind equipment, switchyard, case become, the quantity of ring main unit, and its weight is respectively 0.15,0.15,0.15,0.15,0.15,0.15,0.1;

Significant deficiency defect elimination rate refers to eliminate in time the successful ratio of significant deficiency item number, eliminates in time significant deficiency number and account for the ratio of same period significant deficiency sum, eliminates the ability of hidden trouble in order to reflection, and the computing formula of significant deficiency defect elimination rate is

Temporary interruption ratio refers to that the temporary interruption time accounts for total power off time ratio, because the timing statistics span of all indexs is 1 year, temporary interruption ratio is the ratio that in a year, the temporary interruption time accounts for total power off time in a year, be used for reflecting the rationality that turnaround plan is formulated, the computing formula of temporary interruption ratio is

Hot line job rate, refers to that hot line job in this year project accounts for the ratio of the project of all enforcements, in order to the scope that reflects that hot line job is carried out.Hot line job refers to be carried out operation or approaches the various operations that live part carries out on charged electric device, particularly any part of staff's health or employing instrument, device or instrument enter the All Jobs in the hot line job region of restriction, and its project comprises the following aspects: 1. charged exchange bar cutter, lightning arrester, segmentation and straight line cross-arm, fuse device; 2. charged vertical rod, tune bar; 3. charged tearing open taken pile crown and cable buttock line on fuse; 4. the opened and segmented load plug-in strip that installs additional of on-load; 5. living water washing;

The computing formula of hot line job rate is

Power failure operation is telegram in reply rate on time, refers to that the power failure operation number of times that can restore electricity in time at the appointed time accounts for the ratio of total power failure operation number of times, in order to reflect the efficiency of power failure operation.The power failure operation on time computing formula of telegram in reply rate is

C: utilize triangle Fuzzy AHP, ask for respectively each index weights of index system in steps A through mathematical computations, utilize triangle Fuzzy AHP to ask for the performing step of weight as follows:

C1: model level hierarchical structure;

Set up hierarchical structure according to the difference of decision factor importance, final target is defined as top, be each influence factor below top, is then the sub-factor layer of impact, is finally the lowermost layer by various forecast scheme configurations;

C2: structure triangle fuzzy judgment matrix;

To a certain factor of k-1 layer, at the whole n of k layer to associated _kwhen individual factor carries out comparing between two, adopt Triangular Fuzzy Number quantificational expression, i.e. fuzzy judgment matrix in element α _ij=(l _ij, m _ij, u _ij) be one with m _ijfor the closed interval of intermediate value, wherein, i, j are i factor of k layer and j factor, l _ij, U _ijfor being followed successively by a _ijthe lower limit of value and the upper limit.M _ijvalue adopt the integer in the 1-9 that in traditional AHP method, relatively judgement adopts, its meaning is:

Scale value	Scale meaning
		1	The former with the latter no less important
3	The former is more important a little than the latter
		5	The former is quite more important than the latter
7	The former is strong more important than the latter
		9	The former is extremely more important than the latter
2、4、6、8	Represent the intermediate value of above-mentioned adjacent judgement

；

C3: calculate comprehensive fog-level value;

According to formula: try to achieve the comprehensive Triangular Fuzzy Number judgment matrix of k layer, wherein, ${\mathrm{\α}}_{\mathrm{ij}}^t=(l_{\mathrm{ij}}^t,m_{\mathrm{ij}}^t,u_{\mathrm{ij}}^t),i,j=\mathrm{1,2},...,n_k,t=\mathrm{1,2},...,T,$ represent t expert to i factor of k layer and j factor comparison and the fuzzy number providing; be (t=1,2 ..., T) mean value;

Again according to formula: $S_i^k=\underset{j=1}{\overset{n}{\mathrm{\Σ}}}{M}_{\mathrm{ij}}^k\⊗{\left(\underset{i=1}{\overset{n_k}{\mathrm{\Σ}}}\underset{j=1}{\overset{n_k}{\mathrm{\Σ}}}{M}_{\mathrm{ij}}^k\right)}^{-1},i=\mathrm{1,2},...,n_k$ Try to achieve comprehensive fog-level value, it is the comprehensive fog-level value of i element of k layer;

C4: calculate level weight

First utilize formula calculate,

Draw $V(S_i^k\≥S_j^k),i,j=\mathrm{1,2},...,n_k,i\≠j;$ Wherein, V represents possibility degree;

$P_{\mathrm{ih}}^k\left(A_i^k\right)=\min V(S_i^k\≥S_j^k),i,j=\mathrm{1,2},...,n_k,i\≠j;$ Wherein, represent the weight of each factor to h factor on k-1 layer on k layer, represent i factor on k layer;

Then right be normalized, can obtain the weight to h factor on k-1 layer on k layer, that is:

$P_h={(P_{1h}^k,P_{2h}^k,...,P_{\mathrm{nh}}^k)}^T;$

C5: synthetic total weight

Obtaining after weight at all levels, known k-1 layer to the orderweight vector of general objective is:

the synthetic sequence W of all elements to general objective on k layer so ^kfor:

$W^k=\underset{j=1}{\overset{n_{k-1}}{\mathrm{\Σ}}}{P}_{\mathrm{ij}}^k{W}_j^{k-1},i=\mathrm{1,2},...n_k,$ Wherein W ^kfor total weight;

D: by solving of step C, obtain respectively each index weights, as shown in the table:

E: carry out the evaluation of power distribution network operation and management level, the concrete steps of power distribution network operation and management level evaluation are:

E1: consult industry standard, according to the mark value under power distribution network perfect condition, be converted into centesimal system numerical value, formulate standards of grading;

E2: by collecting the raw data of power distribution network to be evaluated, calculate respectively corresponding index value according to each index computing formula in step B;

E3: according to the index value calculating in step e 2, by consulting the standards of grading of formulating in step 1, the indices of power distribution network operation and management level is evaluated; And utilize in step D and solve each index weights drawing, in conjunction with the index value calculating in E2, can draw the weighted value of operation and management level, can evaluate power distribution network operation and management level.

The present invention is by analyzing the factor that affects power distribution network effect class index, choose the effect class index associated with operation and management level: power distribution network power supply reliability, analyze the relation between it and Regulation level, thereby set up the concrete property index system of evaluating power distribution network operation and management level; Then utilize triangle Fuzzy AHP, ask for respectively each index weights of These parameters system through mathematical computations, finally, by the indices numerical value calculating, by consulting the standards of grading of formulation, the indices of power distribution network operation and management level is evaluated; And in conjunction with each index weights, power distribution network operation and management level is evaluated.The present invention by power distribution network operation and management level the science of carrying out assess exactly, enrich the foundation of power distribution network synthesis index system, be conducive to China's power distribution network and move with security and stability.

Brief description of the drawings

Fig. 1 is schematic flow sheet of the present invention.

Embodiment

As described in Figure 1, power distribution network operation and management level evaluation method of the present invention, comprises the following steps:

A: the factor that affects power distribution network effect class index is analyzed, determined that the effect class index associated with operation and management level is power distribution network power supply reliability, and definite power distribution network operation and management level index that power distribution network power supply reliability is had the greatest impact:

The impact of power distribution network operation and management level on power distribution network power supply reliability:

If power distribution network operation and management level is high, the one, can reduce the potential faults of equipment, reduce the frequency that fault occurs; The 2nd, can repair in time occurred fault, reduce the time having a power failure; The 3rd, can reduce the frequency of power cut that hot line job brings, and restore electricity in time according to the rules when power failure operation the time.

Therefore, the index that operation and management level has the greatest impact to power distribution network power supply reliability is PMS system distribution data integrity, significant deficiency defect elimination rate, temporary interruption ratio, hot line job rate and power failure operation telegram in reply rate on time, as shown in table 1:

Table 1

B: the computing formula of each index in determining step A respectively, the timing statistics span of all indexs is 1 year;

Wherein, PMS system distribution data integrity refers to the ratio of all distribution net equipment sums within the scope of distribution net equipment in Style Product Information Management System and region O&M, and the computing formula of PMS system distribution data integrity is

In above formula, on-pole switch kind equipment comprises isolating switch, on-load switch, disconnector and fuse, distribution overhead transmission line, cable line, pole type transformer, on-pole switch kind equipment, switchyard, case become, the quantity of ring main unit, and its weight is respectively 0.15,0.15,0.15,0.15,0.15,0.15,0.1;

Significant deficiency defect elimination rate refers to eliminate in time the successful ratio of significant deficiency item number, eliminates in time significant deficiency number and account for the ratio of same period significant deficiency sum, eliminates the ability of hidden trouble in order to reflection, and the computing formula of significant deficiency defect elimination rate is

Temporary interruption ratio refers to that the temporary interruption time accounts for total power off time ratio, because the timing statistics span of all indexs is 1 year, temporary interruption ratio is the ratio that in a year, the temporary interruption time accounts for total power off time in a year, be used for reflecting the rationality that turnaround plan is formulated, the computing formula of temporary interruption ratio is

Hot line job rate, refers to that hot line job in this year project accounts for the ratio of the project of all enforcements, in order to the scope that reflects that hot line job is carried out.Hot line job refers to be carried out operation or approaches the various operations that live part carries out on charged electric device, particularly any part of staff's health or employing instrument, device or instrument enter the All Jobs in the hot line job region of restriction, and its project comprises the following aspects: 1. charged exchange bar cutter, lightning arrester, segmentation and straight line cross-arm, fuse device; 2. charged vertical rod, tune bar; 3. charged tearing open taken pile crown and cable buttock line on fuse; 4. the opened and segmented load plug-in strip that installs additional of on-load; 5. living water washing;

The computing formula of hot line job rate is

Power failure operation is telegram in reply rate on time, refers to that the power failure operation number of times that can restore electricity in time at the appointed time accounts for the ratio of total power failure operation number of times, in order to reflect the efficiency of power failure operation.The power failure operation on time computing formula of telegram in reply rate is

C: utilize triangle Fuzzy AHP, ask for respectively each index weights of index system in steps A through mathematical computations, triangle Fuzzy AHP belongs to the state of the art, do not repeat them here, the performing step of intermediate cam Fuzzy AHP of the present invention being asked for to weight is below set forth:

C1: model level hierarchical structure; Set up hierarchical structure according to the difference of decision factor importance, final target is defined as top, be each influence factor below top, is then the sub-factor layer of impact, is finally the lowermost layer by various forecast scheme configurations.

C2: structure triangle fuzzy judgment matrix;

To a certain factor of k-1 layer, at the whole n of k layer to associated _kwhen individual factor carries out comparing between two, adopt Triangular Fuzzy Number quantificational expression, i.e. fuzzy judgment matrix in element α _ij=(l _ij, m _ij, u _ij) be one with m _ijfor the closed interval of intermediate value, wherein, i, j are i factor of k layer and j factor, l _ij, U _ijfor being followed successively by a _ijthe lower limit of value and the upper limit.M _ijvalue adopt the integer in the 1-9 that in traditional AHP method, relatively judgement adopts, its meaning is as shown in table 2:

Scale value	Scale meaning
		1	The former with the latter no less important
3	The former is more important a little than the latter
		5	The former is quite more important than the latter
7	The former is strong more important than the latter
		9	The former is extremely more important than the latter
2、4、6、8	Represent the intermediate value of above-mentioned adjacent judgement

Table 2 is the scale of judgment matrix relatively

C3: calculate comprehensive fog-level value;

According to formula:

$M_{\mathrm{ij}}^k=\frac{1}{T}({\mathrm{\α}}_{\mathrm{ij}}^1\⊕{\mathrm{\α}}_{\mathrm{ij}}^2\⊕...\⊕{\mathrm{\α}}_{\mathrm{ij}}^T)$

Try to achieve the comprehensive Triangular Fuzzy Number judgment matrix of k layer, wherein, ${\mathrm{\α}}_{\mathrm{ij}}^t=(l_{\mathrm{ij}}^t,m_{\mathrm{ij}}^t,u_{\mathrm{ij}}^t),i,j=\mathrm{1,2},...,n_k,t=\mathrm{1,2},...,T,$ represent t expert to i factor of k layer and j factor comparison and the fuzzy number providing; be (t=1,2 ..., T) mean value.

Again according to formula:

$S_i^k=\underset{j=1}{\overset{n}{\mathrm{\Σ}}}{M}_{\mathrm{ij}}^k\⊗{\left(\underset{i=1}{\overset{n_k}{\mathrm{\Σ}}}\underset{j=1}{\overset{n_k}{\mathrm{\Σ}}}{M}_{\mathrm{ij}}^k\right)}^{-1},i=\mathrm{1,2},...,n_k$

Try to achieve comprehensive fog-level value, it is the comprehensive fog-level value of i element of k layer.

C4: calculate level weight

First utilize formula calculate,

Draw $V(S_i^k\≥S_j^k),i,j=\mathrm{1,2},...,n_k,i\≠j;$

Wherein, V represents possibility degree.

$P_{\mathrm{ih}}^k\left(A_i^k\right)=\min V(S_i^k\≥S_j^k),i,j=\mathrm{1,2},...,n_k,i\≠j;$

Wherein, represent the weight of each factor to h factor on k-1 layer on k layer, represent i factor on k layer.

Then right be normalized, can obtain the weight to h factor on k-1 layer on k layer, that is:

$P_h={(P_{1h}^k,P_{2h}^k,...,P_{\mathrm{nh}}^k)}^T;$

C5: synthetic total weight

Obtaining after weight at all levels, known k-1 layer to the orderweight vector of general objective is:

the synthetic sequence W of all elements to general objective on k layer so ^kfor:

$W^k=\underset{j=1}{\overset{n_{k-1}}{\mathrm{\Σ}}}{P}_{\mathrm{ij}}^k{W}_j^{k-1},i=\mathrm{1,2},...n_k---\left(10\right),$ Wherein W ^kfor total weight;

D: by solving of step C, obtain respectively each index weights, as shown in table 3;

Table 3

E: carry out the evaluation of power distribution network operation and management level; The concrete steps of power distribution network operation and management level evaluation are:

E1: consult industry standard, according to the mark value of index under power distribution network perfect condition, be converted into centesimal system numerical value, formulate standards of grading;

Standards of grading refer to by certain scale system, the standardization form that can directly compare that various raw data are converted to; Scoring scale can adopt centesimal system, ten point system and the five-grade marking system.In the present embodiment, adopt centesimal system, score is higher illustrates that performance is better.

Type and the ideal value of the main reference index of formulation of index standards of grading, pointer type is divided into direct index, negative index and intermediate value index, direct index refers to that this index value is more high better, negative index is that value is more low better, and intermediate value index is that value is at certain numerical value of centre or interval best.

In the process that power distribution network is evaluated, need to determine the zone of reasonableness of index value.Within certain parameter is positioned at this zone of reasonableness time, show substantially to meet the demands from the parameter of this angle electrical network or the system running state of its sign; Otherwise quite different.The zone of reasonableness of index is the ideal value of index.

By searching power distribution network relevant industries standard, make operation and management level appraisement system pointer type and ideal value (as shown in table 4), and the standards of grading of operation and management level appraisement system (as shown in table 5):

Operation and management level appraisement system pointer type and ideal value

Table 4

The standards of grading of operation and management level appraisement system

Table 5

E2: by collecting the raw data of power distribution network to be evaluated, calculate respectively corresponding index value according to each index computing formula in step B;

E3: according to the index value calculating in step e 2, by consulting the standards of grading of formulating in step 1, the indices of power distribution network operation and management level is evaluated; And utilize in step D and solve each index weights drawing, in conjunction with the index value calculating in E2, can draw the weighted value of operation and management level, can evaluate power distribution network operation and management level.

For example, utilize the method to carry out operation and management level evaluation to certain power distribution network, raw data and result of calculation are as shown in table 6.Calculating wherein PMS system distribution data integrity desired value is 89.45% (233552/261094), and consulting known its scoring of standards of grading is 69.80, and the PMS system data integrality of this power distribution network is better as seen, and score is higher.Be multiplied by weighted value separately by each index scoring simultaneously, and then sue for peace to such an extent that this power distribution network operation and management level scoring is 67.71 (69.80*0.20+100*0.25+32.61*0.15+23.09*0.20+96.18*0.20), this evaluates to such an extent that to belong to qualified water flat, illustrate that this power distribution network operation and management level is better, wherein the larger sub-index of impact is temporary interruption ratio and hot line job rate, need significantly promote.

Table 6 operation and management level is evaluated example

Claims (1)

1. a power distribution network operation and management level evaluation method, is characterized in that, comprises the following steps:

A: the factor that affects power distribution network effect class index is analyzed, determined that the effect class index associated with operation and management level is power distribution network power supply reliability, and definite power distribution network operation and management level index that power distribution network power supply reliability is had the greatest impact;

Wherein, the index that operation and management level has the greatest impact to power distribution network power supply reliability is PMS system distribution data integrity, significant deficiency defect elimination rate, temporary interruption ratio, hot line job rate and power failure operation telegram in reply rate on time;

B: the computing formula of each index in determining step A respectively;

Wherein, PMS system distribution data integrity refers to the ratio of all distribution net equipment sums within the scope of distribution net equipment in Style Product Information Management System and region O&M, and the computing formula of PMS system distribution data integrity is

In above formula, on-pole switch kind equipment comprises isolating switch, on-load switch, disconnector and fuse, distribution overhead transmission line, cable line, pole type transformer, on-pole switch kind equipment, switchyard, case become, the quantity of ring main unit, and its weight is respectively 0.15,0.15,0.15,0.15,0.15,0.15,0.1;

Significant deficiency defect elimination rate refers to eliminate in time the successful ratio of significant deficiency item number, eliminates in time significant deficiency number and account for the ratio of same period significant deficiency sum, eliminates the ability of hidden trouble in order to reflection, and the computing formula of significant deficiency defect elimination rate is

Temporary interruption ratio refers to that the temporary interruption time accounts for total power off time ratio, because the timing statistics span of all indexs is 1 year, temporary interruption ratio is the ratio that in a year, the temporary interruption time accounts for total power off time in a year, be used for reflecting the rationality that turnaround plan is formulated, the computing formula of temporary interruption ratio is

Hot line job rate, refers to that hot line job in this year project accounts for the ratio of the project of all enforcements, in order to the scope that reflects that hot line job is carried out.Hot line job refers to be carried out operation or approaches the various operations that live part carries out on charged electric device, particularly any part of staff's health or employing instrument, device or instrument enter the All Jobs in the hot line job region of restriction, and its project comprises the following aspects: 1. charged exchange bar cutter, lightning arrester, segmentation and straight line cross-arm, fuse device; 2. charged vertical rod, tune bar; 3. charged tearing open taken pile crown and cable buttock line on fuse; 4. the opened and segmented load plug-in strip that installs additional of on-load; 5. living water washing;

The computing formula of hot line job rate is

Power failure operation is telegram in reply rate on time, refers to that the power failure operation number of times that can restore electricity in time at the appointed time accounts for the ratio of total power failure operation number of times, in order to reflect the efficiency of power failure operation.The power failure operation on time computing formula of telegram in reply rate is

C: utilize triangle Fuzzy AHP, ask for respectively each index weights of index system in steps A through mathematical computations, utilize triangle Fuzzy AHP to ask for the performing step of weight as follows:

C1: model level hierarchical structure;

Set up hierarchical structure according to the difference of decision factor importance, final target is defined as top, be each influence factor below top, is then the sub-factor layer of impact, is finally the lowermost layer by various forecast scheme configurations;

C2: structure triangle fuzzy judgment matrix;

To a certain factor of k-1 layer, in the time that the whole nk of the k layer factor to associated carries out comparing between two, adopt Triangular Fuzzy Number quantificational expression, i.e. fuzzy judgment matrix in element α _ij=(l _ij, m _ij, u _ij) be one with m _ijfor the closed interval of intermediate value, wherein, i, j are i factor of k layer and j factor, l _ij, U _ijfor being followed successively by a _ijthe lower limit of value and the upper limit.M _ijvalue adopt the integer in the 1-9 that in traditional AHP method, relatively judgement adopts, its meaning is:

Scale value Scale meaning 1 The former with the latter no less important 3 The former is more important a little than the latter 5 The former is quite more important than the latter

7 The former is strong more important than the latter 9 The former is extremely more important than the latter 2、4、6、8 Represent the intermediate value of above-mentioned adjacent judgement

；

C3: calculate comprehensive fog-level value;

According to formula: try to achieve the comprehensive Triangular Fuzzy Number judgment matrix of k layer, wherein, ${\mathrm{\α}}_{\mathrm{ij}}^t=(l_{\mathrm{ij}}^t,m_{\mathrm{ij}}^t,u_{\mathrm{ij}}^t),i,j=\mathrm{1,2},...,n_k,t=\mathrm{1,2},...,T,$ represent t expert to i factor of k layer and j factor comparison and the fuzzy number providing; be (t=1,2 ..., T) mean value;

Again according to formula: $S_i^k=\underset{j=1}{\overset{n}{\mathrm{\Σ}}}{M}_{\mathrm{ij}}^k\⊗{\left(\underset{i=1}{\overset{n_k}{\mathrm{\Σ}}}\underset{j=1}{\overset{n_k}{\mathrm{\Σ}}}{M}_{\mathrm{ij}}^k\right)}^{-1},i=\mathrm{1,2},...,n_k$ Try to achieve comprehensive fog-level value, it is the comprehensive fog-level value of i element of k layer;

C4: calculate level weight

First utilize formula calculate,

Draw $V(S_i^k\≥S_j^k),i,j=\mathrm{1,2},...,n_k,i\≠j;$ Wherein, V represents possibility degree;

$P_{\mathrm{ih}}^k\left(A_i^k\right)=\min V(S_i^k\≥S_j^k),i,j=\mathrm{1,2},...,n_k,i\≠j;$ Wherein, represent the weight of each factor to h factor on k-1 layer on k layer, represent i factor on k layer;

Then right be normalized, can obtain the weight to h factor on k-1 layer on k layer, that is:

$P_h={(P_{1h}^k,P_{2h}^k,...,P_{\mathrm{nh}}^k)}^T;$

C5: synthetic total weight

Obtaining after weight at all levels, known k-1 layer to the orderweight vector of general objective is:

the synthetic sequence W of all elements to general objective on k layer so ^kfor:

$W^k=\underset{j=1}{\overset{n_{k-1}}{\mathrm{\Σ}}}{P}_{\mathrm{ij}}^k{W}_j^{k-1},i=\mathrm{1,2},...n_k,$ Wherein W ^kfor total weight;

D: by solving of step C, obtain respectively each index weights, as shown in the table:

E: carry out the evaluation of power distribution network operation and management level, the concrete steps of power distribution network operation and management level evaluation are:

E1: consult industry standard, according to the mark value under power distribution network perfect condition, be converted into centesimal system numerical value, formulate standards of grading;

E2: by collecting the raw data of power distribution network to be evaluated, calculate respectively corresponding index value according to each index computing formula in step B;

E3: according to the index value calculating in step e 2, by consulting the standards of grading of formulating in step 1, the indices of power distribution network operation and management level is evaluated; And utilize in step D and solve each index weights drawing, in conjunction with the index value calculating in E2, can draw the weighted value of operation and management level, can evaluate power distribution network operation and management level.