CN106096815A - A kind of power distribution network operational efficiency Impact analysis method - Google Patents
A kind of power distribution network operational efficiency Impact analysis method Download PDFInfo
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- CN106096815A CN106096815A CN201610377749.7A CN201610377749A CN106096815A CN 106096815 A CN106096815 A CN 106096815A CN 201610377749 A CN201610377749 A CN 201610377749A CN 106096815 A CN106096815 A CN 106096815A
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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Abstract
The present invention relates to a kind of power distribution network operational efficiency Impact analysis method, comprise the steps: step 1: valuator device operational efficiency disturbance degree, comprising: computing device operational efficiency disturbance degree indexStep 2: evaluate with layer same category of device operational efficiency disturbance degree, comprising: calculate with layer same category of device operational efficiency disturbance degree indexStep 3: evaluate distribution system operational efficiency disturbance degree, comprising: calculate distribution system operational efficiency disturbance degree indexStep 4: power distribution network operational efficiency disturbance degree is evaluated and weak link analysis.The present invention finds the key factor affecting power distribution network operational efficiency more accurately, and it is further proposed that the direction that is optimized power distribution network and measure, the present invention proposes a kind of power distribution network operational efficiency Impact analysis method.
Description
Technical field
The present invention relates to the analysis method in the fields such as power distribution network operation, monitoring and assessment, be specifically related to a kind of power distribution network fortune
Line efficiency Impact analysis method.
Background technology
Power distribution network operational efficiency, with each hour actual load duration curve for analyzing object, stresses planning as a whole to examine in equipment year
On the premise of considering security and the economy that power distribution network runs, analyze controller switching equipment in evaluation cycle, play its electrical power distribution energy
The degree of power.Power distribution network operational efficiency evaluation model includes equipment operating efficiency evaluation model, with layer equipment operating efficiency evaluation
Model and distribution system operational efficiency evaluation model.Wherein, power distribution network main equipment operational efficiency evaluation model meets base with equipment
Maximum when safety criterion (such as N-1) and other security constraints (as considered the condition such as running environment, repair and maintenance requirement) can
Conveying load is the upper limit, and using the lower limit of equipment optimized operation zone as lower limit, by passing judgment on equipment within a period of time
The departure degree of actual load duration curve and the upper limit, weigh the height of its operational efficiency；It with layer equipment operating efficiency is
The weighted sum of this layer of all individual equipment operational efficiency, weight is determined by equipment manufacturing cost；Distribution system operational efficiency is power distribution system
The weighted sum of all level equipment operating efficiencies in system, weight is determined by total equipment manufacturing cost of each layer equipment.
When evaluation analysis is carried out to certain regional distribution network operational efficiency, according to power distribution network operational efficiency evaluation model, obtaining
After operational efficiency evaluation result, need the weak link of further assay object, find and affect power distribution network operational efficiency
Key factor, thus the direction that is optimized power distribution network and measure are proposed.It is on the one hand, single from the point of view of operational efficiency index,
In evaluation procedure, people are intended to desired value can reach optimum, focuses more on those lifting disturbance degree to desired value and compares
Big item, and then therefrom can find weak link further.On the other hand, equipment, run effect with layer equipment and distribution system
Rate evaluation model is constituted by different subitems, and each subitem is constituted by operational efficiency and corresponding weight, therefore, and each subitem
Operational efficiency and weight all can affect overall operational efficiency, need to analyze the combined influence degree journey to global index value for each subitem
Degree, can obtain the weak link that currently need to preferentially solve.
Content of the invention
For solving above-mentioned deficiency of the prior art, it is an object of the invention to provide a kind of power distribution network operational efficiency disturbance degree
Analysis method, the method finds the key factor affecting power distribution network operational efficiency more accurately, and it is further proposed that to distribution
Direction that net is optimized and measure.
It is an object of the invention to use following technical proposals to realize:
The present invention provides a kind of power distribution network operational efficiency Impact analysis method, and it thes improvement is that, described method bag
Include following step:
Step 1: valuator device operational efficiency disturbance degree, comprising: computing device operational efficiency disturbance degree index
Step 2: evaluate with layer same category of device operational efficiency disturbance degree, comprising: calculate with layer same category of device operational efficiency shadow
Sonority norm
Step 3: evaluate distribution system operational efficiency disturbance degree, comprising: calculate distribution system operational efficiency disturbance degree index
Step 4: power distribution network operational efficiency disturbance degree is evaluated and weak link analysis.
Further, the computing device operational efficiency disturbance degree index of described step 1Comprise the steps:
1. machine utilization curve is rearranged according to order from big to small, obtain lasting load curve；
2. (as considered to run when computing device meets basic security criterion (such as N-1 safety criterion) and other security constraints
The conditions such as environment, repair and maintenance requirement) maximum can carry load PU, it is set to the upper limit, PUIt is referred to as the safe operation limit value of equipment,
Load value P corresponding during computing device underloadingD, it is set to lower limit, PDIt is referred to as optimized operation zone lower limit；PUAnd PDBy equipment
Lasting load curve is divided into three running sections, i.e. more than PUPart, between PUWith PDBetween part and be less than PDPortion
Point；
3. three running sections corresponding time interval [0, t respectively is calculatedEi], actual electricity SiElectricity can be carried with maximum
SEi, wherein i=1,2,3；
4. operational efficiency value r of three running sections is calculatedjWith corresponding weight ρj；rjOperate in jth section for equipment right
The operational efficiency answered；ρjOperate in the efficiency weight coefficient of jth section for equipment, i.e. the equipment jth section continued power time accounts for evaluation
The proportion in cycle；J=1,2,3；
5. equipment operating efficiency disturbance degree index is calculated
Further, the index definition reacting whole equipment operating efficiency combined influence degree is:
In formula,Equipment operating efficiency disturbance degree index；
r0The theoretical optimal index value of operational efficiency；
SjIn evaluation cycle, equipment operates in the actual power amount of jth section, S=S1+S2+S3Set in evaluation cycle
Standby actual power amount；
SEjIn evaluation cycle, equipment meets the maximum of safe operation limit value in jth section and can carry electricity, SE=SE1+
SE2+SE3The maximum meeting safe operation limit value for equipment in evaluation cycle can carry electricity；
S1.0In evaluation cycle the design maximum of equipment can carry electricity (consider equipment rated capacity, run ring
The conditions such as border, repair and maintenance requirement, take no account of N-1 safety criterion)；
P1.0The design maximum of equipment can transmission capacity, SE/S1.0=PU/P1.0The equipment of being meets safe operation limit value
Maximum load rate；
tE1" safe operation limit value " P of equipmentUIntersect the corresponding time with based model for load duration curve；
tE2Equipment " optimized operation zone lower limit " PDIntersect the corresponding time with based model for load duration curve；
T evaluation cycle.
Further, the calculating of described step 2 is with layer same category of device operational efficiency disturbance degree indexIncluding following step
Rapid:
1. each equipment operating efficiency disturbance degree index is calculated according to step 1, the operational efficiency impact of j-th i kind equipment
Degree index is designated as
2. calculate each asset of equipments and be worth the ratio accounting for this layer of equipment total assets value, j-th i kind equipment assets value
The weight accounting for this kind equipment total assets value is designated as θij；
3. same layer equipment operating efficiency disturbance degree index is calculated
Further, it is assumed that the theoretical optimal index value of individual equipment operational efficiency is r0, thenRepresent that this sets
The gap of received shipment line efficiency relative optimal value, θijRepresent the weight that same layer same category of device overall objective is affected by this equipment；Reflection
It with the index definition of layer same category of device operational efficiency combined influence degree is:
In formula:I-th kind equipment overall operation efficiency disturbance degree index；
MiThe total quantity of the i-th kind equipment；
EERijThe operational efficiency of j-th i kind equipment.
Further, the calculating distribution system operational efficiency disturbance degree index of described step 3Comprise the steps:
1. every kind equipment operational efficiency disturbance degree index is calculated according to step 2, the overall operation efficiency impact of the i-th kind equipment
Degree index is designated as
2. calculate every kind equipment total assets and be worth the ratio accounting for distribution system total assets value, the i-th kind equipment assets value
The weight accounting for system total assets value is designated as ωi；
3. distribution system operational efficiency disturbance degree index is calculated
Further, based on each level equipment operating efficiency disturbance degree index, with same layer same category of device assets value accounting
For weight, design system operational efficiency disturbance degree index computing formula is:
In formula:Running efficiency of system disturbance degree index；
N devices in system level number；
ωiI-th kind equipment assets value accounts for the weight that system total assets is worth；
The operational efficiency disturbance degree index of the i-th kind equipment.
?WithCalculating during, disturbance degree index is decomposed in the bigger individual event of weighted results, i.e. It is also bigger on the impact of overall operation efficiency index.
Further, described step 4 comprises the steps:
1. according to distribution system operational efficiency disturbance degree indexResult of calculation, to equipment level disturbance degree indexCarrying out sort descending, the corresponding equipment level of the maximum subitem of desired value is and affects distribution system operational efficiency
Maximum equipment level, the weak link promoting with positioning effects distribution system operational efficiency；
2. according to layer equipment operating efficiency disturbance degree indexResult of calculation, to individual equipment disturbance degree indexCarrying out sort descending, the corresponding equipment of the maximum subitem of desired value is and affects this level equipment operating efficiency
Maximum capital equipment, the weak link promoting with layer equipment operating efficiency with positioning effects.
3. according to equipment operating efficiency disturbance degree indexResult of calculation, to segmentation disturbance degree index (r0-rj)·ρj
Carrying out sort descending, the corresponding running section of the maximum subitem of desired value is the master maximum on the impact of this equipment operating efficiency
Want section, the weak link promoting with positioning effects equipment operating efficiency；
4. according to above analysis result, affect, present in distribution system, the weak link that operational efficiency promotes,
Planning construction and transformation, optimizing operating mode propose improve target and measure.
Compared with immediate prior art, the excellent effect that the technical scheme of present invention offer has is:
(1) the analysis method that the present invention proposes has the wider scope of application, can be applicable to power distribution network operational efficiency evaluation
In analysis.This method compensate for deficiency in terms of weak link analysis for the power distribution network operational efficiency evaluation model, has clearly
Mathematics meaning.
(2) present invention proposes system, with layer same category of device, equipment operating efficiency disturbance degree evaluation model can be clearly to being
System, with the maximum capital equipment level of the negative effect of layer same category of device, equipment operating efficiency, equipment and running section, thus
Positioning effects system, the weak link promoting with layer same category of device and equipment operating efficiency, be planning construction, the fortune of power distribution network
Line mode arrangement proposes effective instruction.
Brief description
Fig. 1 is the power distribution network operational efficiency disturbance degree calculation procedure flow chart that the present invention provides；
Fig. 2 is the power distribution network operational efficiency Impact analysis flow chart of steps that the present invention provides；
Fig. 3 is the lasting load curve figure of the equipment that the present invention provides.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in further detail.
The following description and drawings illustrate specific embodiments of the present invention fully, to enable those skilled in the art to
Put into practice them.Other embodiments can include structure, logic, electric, process and other change.Embodiment
Only represent possible change.Unless explicitly requested, otherwise single assembly and function are optional, and the order operating is permissible
Change.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.This
The scope of bright embodiment includes the gamut of claims, and all obtainable of claims is equal to
Thing.Herein, these embodiments of the present invention can be represented individually or generally with term " invention ", and this is only
For convenience, and if in fact disclose invention more than one, be not meant to automatically to limit this application in the range of appointing
What single invention or inventive concept.
The flow chart of the present invention as illustrated in fig. 1 and 2, specifically comprises the following steps that
(1) valuator device operational efficiency disturbance degree, comprising: computing device operational efficiency disturbance degree index
1. machine utilization curve is rearranged according to order from big to small, obtain lasting load curve；
2. (as considered to run when computing device meets basic security criterion (such as N-1 safety criterion) and other security constraints
The conditions such as environment, repair and maintenance requirement) maximum can carry load PU, it is set to the upper limit (now PUIt is referred to as " the safe operation of equipment
Limit value "), load value P corresponding during computing device underloadingD, it is set to lower limit (now PDIt is referred to as " under optimized operation zone of equipment
Limit ").PUAnd PDThe lasting load curve of equipment is divided into three sections, i.e. more than PUPart, between PUWith PDBetween part and low
In PDPart；
3. three running sections corresponding time interval [0, t respectively is calculatedEi] (i=1,2,3), actual electricity SiAnd maximum
Electricity S can be carriedEi(i=1,2,3)；
4. the operational efficiency value (r of three running sections is calculatedj) and corresponding weight (ρj)；
5. according to formulaThe equipment that calculates runs effect
Rate disturbance degree indexIncluding:
The lasting load curve of equipment is as it is shown on figure 3, with " safe operation limit value " P of equipmentUFor the upper limit, with equipment " warp
Ji traffic coverage lower limit " (or load value corresponding during underloading) PDFor lower limit, the lasting load curve of equipment is divided into three
Running section, i.e. more than PUPart, between PUWith PDBetween part and be less than PDPart.Equipment operating efficiency is by three
Subitem is constituted, and each subitem is the operational efficiency value (r in corresponding running sectionj) and corresponding weight (ρj) product.
The theoretical optimal index value assuming the operational efficiency of each running section of equipment is r0, then (r0-rj) mean that this
The gap of running section operational efficiency relative optimal value, ρjRepresent this running section operational efficiency to equipment overall operation efficiency
Influence degree, then the index reacting whole equipment operating efficiency combined influence degree may be defined as:
In formula,
Equipment operating efficiency disturbance degree index；
ρjEquipment operates in the efficiency weight coefficient of jth section, i.e. the equipment jth section continued power time accounts for evaluation cycle
Proportion；
r0The theoretical optimal index value of operational efficiency；
rjEquipment operates in the operational efficiency corresponding to jth section；
SjIn evaluation cycle, equipment operates in the actual power amount of jth section, S=S1+S2+S3Set in evaluation cycle
Standby actual power amount；
SEjIn evaluation cycle, equipment meets the maximum of safe operation limit value in jth section and can carry electricity, SE=SE1+
SE2+SE3The maximum meeting safe operation limit value for equipment in evaluation cycle can carry electricity；
S1.0In evaluation cycle the design maximum of equipment can carry electricity (consider equipment rated capacity, run ring
The conditions such as border, repair and maintenance requirement, take no account of N-1 safety criterion)；
P1.0The design maximum of equipment can transmission capacity, SE/S1.0=PU/P1.0The equipment of being meets safe operation limit value
Maximum load rate；
tE1" safe operation limit value " P of equipmentUIntersect the corresponding time with based model for load duration curve；
tE2Equipment " optimized operation zone lower limit " PDIntersect the corresponding time with based model for load duration curve；
T evaluation cycle.
(2) evaluate with layer same category of device operational efficiency disturbance degree, comprising: calculate with layer equipment operating efficiency disturbance degree index
1. each equipment operating efficiency disturbance degree index, the operational efficiency shadow of j-th i kind equipment are calculated according to step (1)
Sonority norm is designated as
2. calculate each asset of equipments and be worth the ratio accounting for this layer of equipment total assets value, j-th i kind equipment assets value
The weight accounting for this kind equipment total assets value is designated as θij；
3. according to formulaCalculate same layer equipment operating efficiency disturbance degree indexBag
Include:
With layer same category of device operational efficiency by the operational efficiency value (EER of individual equipmentij) and corresponding weight (θij) take advantage of
Long-pending.The theoretical optimal index value assuming individual equipment operational efficiency is r0, then (r0-EERij) mean that this equipment operating efficiency phase
Gap to optimal value, θijRepresent the weight that same layer same category of device overall objective is affected by this equipment.Therefore, reflection is similar with layer
The index of equipment operating efficiency combined influence degree may be defined as:
In formula:
I-th kind equipment overall operation efficiency disturbance degree index；
MiThe total quantity of the i-th kind equipment；
θijJ-th i kind equipment assets value accounts for the weight that this kind equipment total assets is worth；
EERijThe operational efficiency of j-th i kind equipment.
The operational efficiency disturbance degree index of j-th i kind equipment.
(3) distribution system operational efficiency disturbance degree is evaluated, comprising: calculate running efficiency of system disturbance degree index
1. every kind equipment operational efficiency disturbance degree index, the overall operation efficiency shadow of the i-th kind equipment are calculated according to step (2)
Sonority norm is designated as
2. calculating every kind equipment total assets and being worth the ratio accounting for system total assets value, the i-th kind equipment assets value accounts for and is
The weight that system total assets is worth is designated as ωi；
3. according to formulaCalculate running efficiency of system disturbance degree indexIncluding:
Based on each level equipment operating efficiency disturbance degree index, with same layer same category of device assets value accounting as weight, if
Meter systems operational efficiency disturbance degree index computing formula is:
In formula:
Running efficiency of system disturbance degree index；
N devices in system level number (generally 4, i.e. include high-tension line, main transformer, medium-voltage line and distribution transforming)；
ωiI-th kind equipment assets value accounts for the weight that system total assets is worth；
The operational efficiency disturbance degree index of the i-th kind equipment.
?WithCalculating during, the bigger individual event of weighted results decomposes disturbance degree index (i.e.), it is also bigger on the impact of overall operation efficiency index.
(4) power distribution network operational efficiency disturbance degree is evaluated and weak link analysis:
1. the result of calculation according to running efficiency of system disturbance degree index, to equipment level disturbance degree indexCarry out
Sort descending, the corresponding equipment level of the maximum subitem of desired value is the capital equipment maximum on running efficiency of system impact
Level, thus the weak link that positioning effects running efficiency of system promotes.
2. according to the result of calculation with layer equipment operating efficiency disturbance degree index, to individual equipment disturbance degree indexCarrying out sort descending, the corresponding equipment of the maximum subitem of desired value is and affects this level equipment operating efficiency
Maximum capital equipment, thus the weak link that positioning effects promotes with layer equipment operating efficiency.
3. the result of calculation according to equipment operating efficiency disturbance degree index, to segmentation disturbance degree index (r0-rj)·ρjCarry out
Sort descending, the corresponding running section of the maximum subitem of desired value is the main region maximum on the impact of this equipment operating efficiency
Section, thus the weak link that positioning effects equipment operating efficiency promotes.
4. the analysis result according to above step, affects, present in power distribution network, the weak ring that operational efficiency promotes
Joint, can have the proposition stressing to improve target and corresponding measure in planning construction and transformation, optimizing operating mode.
Embodiment
For example, certain regional distribution network is made up of high-tension line, main transformer, medium-voltage line, four levels of distribution transforming.It is computed, its
Running efficiency of system is 0.28, " operational efficiency ", " weight ", " disturbance degree index is decomposed in individual event ", " the weighting decomposition of four levels
Disturbance degree index " is as shown in table 1.
Table 1 running efficiency of system Impact analysis index
| Subitem | High-tension line | Main transformer | Medium-voltage line | Distribution transforming |
| Operational efficiency value | 0.25 | 0.41 | 0.26 | 0.13 |
| Weight | 0.19 | 0.27 | 0.43 | 0.11 |
| Disturbance degree index is decomposed in individual event | 0.75 | 0.59 | 0.74 | 0.87 |
| Disturbance degree index is decomposed in weighting | 0.14 | 0.16 | 0.32 | 0.10 |
According to the result of calculation of table 1, in four layers of equipment, the weighting decomposition disturbance degree index of medium-voltage line is the highest, is 0.32,
Being the equipment level maximum to this district system operational efficiency disturbance degree, next to that main transformer, high-tension line, distribution transforming is minimum.Although
Medium-voltage line operational efficiency is not the minimum in four kind equipments, but shared by it, weight is relatively big, carries running efficiency of system
The impact rising is maximum, therefore chooses medium-voltage line and be further analyzed.Being computed, medium-voltage line level operational efficiency is 0.26,
Article 10, " operational efficiency ", " weight ", " disturbance degree index is decomposed in individual event ", " disturbance degree index is decomposed in weighting " of medium-voltage line is such as table
Shown in 2.
Table 2 medium-voltage line level operational efficiency Impact analysis index
| Subitem | Circuit 1 | Circuit 2 | Circuit 3 | Circuit 4 | Circuit 5 | Circuit 6 | Circuit 7 | Circuit 8 | Circuit 9 | Circuit 10 |
| Operational efficiency | 0.12 | 0.35 | 0.26 | 0.29 | 0.09 | 0.48 | 0.17 | 0.23 | 0.31 | 0.14 |
| Weight | 0.06 | 0.12 | 0.15 | 0.06 | 0.07 | 0.09 | 0.15 | 0.09 | 0.15 | 0.06 |
| Disturbance degree index is decomposed in individual event | 0.88 | 0.65 | 0.74 | 0.71 | 0.91 | 0.52 | 0.83 | 0.77 | 0.69 | 0.86 |
| Disturbance degree index is decomposed in weighting | 0.05 | 0.08 | 0.11 | 0.04 | 0.06 | 0.05 | 0.12 | 0.07 | 0.10 | 0.05 |
According to the result of calculation of table 2, in 10 medium-voltage lines, the weighting decomposition disturbance degree index of circuit 7 is the highest, is
0.12, it is the equipment maximum to medium-voltage line level operational efficiency disturbance degree, next to that circuit the 3rd, circuit 9, circuit is the 1st, 10 minimum.
Although circuit 7 operational efficiency is not the minimum in 10 circuits, but shared by it, weight is relatively big, transports medium-voltage line level
The impact that line efficiency promotes is maximum, therefore access line 7 is further analyzed.Being computed, circuit 7 operational efficiency is 0.17, three
" operational efficiency ", " weight ", " disturbance degree index is decomposed in individual event ", " disturbance degree index is decomposed in weighting " of individual running section is such as table 3
Shown in.
Table 3 circuit 7 operational efficiency Impact analysis index
| Subitem | Section 1 | Section 2 | Section 3 |
| Operational efficiency | 0.71 | 0.31 | 0.11 |
| Weight | 0.06 | 0.12 | 0.82 |
| Disturbance degree index is decomposed in individual event | 0.29 | 0.69 | 0.89 |
| Disturbance degree index is decomposed in weighting | 0.02 | 0.08 | 0.73 |
According to the result of calculation of table 3, in three running sections, the weighting decomposition disturbance degree index of section 3 is the highest, is
0.11, it is the running section maximum to circuit 7 operational efficiency disturbance degree.
Above example is only in order to illustrate that technical scheme is not intended to limit, although with reference to above-described embodiment pair
The present invention has been described in detail, and the detailed description of the invention of the present invention still can be entered by those of ordinary skill in the field
Row modification or equivalent, these are changed or equivalent without departing from any of spirit and scope of the invention, all in application
Within the claims of the present invention awaiting the reply.
Claims (8)
1. a power distribution network operational efficiency Impact analysis method, it is characterised in that described method comprises the steps:
Step 1: valuator device operational efficiency disturbance degree, comprising: computing device operational efficiency disturbance degree index
Step 2: evaluate with layer same category of device operational efficiency disturbance degree, comprising: calculate with layer same category of device operational efficiency disturbance degree
Index
Step 3: evaluate distribution system operational efficiency disturbance degree, comprising: calculate distribution system operational efficiency disturbance degree index
Step 4: power distribution network operational efficiency disturbance degree is evaluated and weak link analysis.
2. power distribution network operational efficiency Impact analysis method as claimed in claim 1, it is characterised in that the meter of described step 1
Calculate equipment operating efficiency disturbance degree indexComprise the steps:
1. machine utilization curve is rearranged according to order from big to small, obtain lasting load curve；
2. maximum when computing device meets basic security criterion and other security constraints can carry load PU, it is set to the upper limit, PUClaim
For the safe operation limit value of equipment, load value P corresponding during computing device underloadingD, it is set to lower limit, PDIt is referred to as Economic moving region
Between lower limit；PUAnd PDThe lasting load curve of equipment is divided into three running sections, i.e. more than PUPart, between PUWith PDBetween
Part and be less than PDPart；
3. three running sections corresponding time interval [0, t respectively is calculatedEi], actual electricity SiElectricity S can be carried with maximumEi,
Wherein i=1,2,3；
4. operational efficiency value r of three running sections is calculatedjWith corresponding weight ρj；rjOperate in corresponding to jth section for equipment
Operational efficiency；ρjOperate in the efficiency weight coefficient of jth section for equipment, i.e. the equipment jth section continued power time accounts for evaluation cycle
Proportion；J=1,2,3；
5. equipment operating efficiency disturbance degree index is calculated。
3. power distribution network operational efficiency Impact analysis method as claimed in claim 2, it is characterised in that react whole equipment fortune
The index definition of line efficiency combined influence degree is:
In formula,Equipment operating efficiency disturbance degree index；
r0The theoretical optimal index value of operational efficiency；
SjIn evaluation cycle, equipment operates in the actual power amount of jth section, S=S1+S2+S3Reality for equipment in evaluation cycle
Border delivery；
SEjIn evaluation cycle, equipment meets the maximum of safe operation limit value in jth section and can carry electricity, SE=SE1+SE2+
SE3The maximum meeting safe operation limit value for equipment in evaluation cycle can carry electricity；
S1.0In evaluation cycle, the design maximum of equipment can carry electricity；
P1.0The design maximum of equipment can transmission capacity, SE/S1.0=PU/P1.0The equipment of being meets safe operation limit value
Heavy load rate；
tE1" safe operation limit value " P of equipmentUIntersect the corresponding time with based model for load duration curve；
tE2Equipment " optimized operation zone lower limit " PDIntersect the corresponding time with based model for load duration curve；
T evaluation cycle.
4. power distribution network operational efficiency Impact analysis method as claimed in claim 1, it is characterised in that the meter of described step 2
Calculate with layer same category of device operational efficiency disturbance degree indexComprise the steps:
1. calculating each equipment operating efficiency disturbance degree index according to step 1, the operational efficiency disturbance degree of j-th i kind equipment refers to
It is labeled as
2. calculating each asset of equipments and being worth the ratio accounting for this layer of equipment total assets value, j-th i kind equipment assets value accounts for this
The weight that kind equipment total assets is worth is designated as θij；
3. same layer equipment operating efficiency disturbance degree index is calculated
5. power distribution network operational efficiency Impact analysis method as claimed in claim 4, it is characterised in that assume that individual equipment is transported
The theoretical optimal index value of line efficiency is r0, then (r0-EERij) represent the gap of this equipment operating efficiency relative optimal value, θijTable
Show the weight that same layer same category of device overall objective is affected by this equipment；Reflection is with layer same category of device operational efficiency combined influence degree
Index definition be:
In formula:I-th kind equipment overall operation efficiency disturbance degree index；
MiThe total quantity of the i-th kind equipment；
EERijThe operational efficiency of j-th i kind equipment.
6. power distribution network operational efficiency Impact analysis method as claimed in claim 1, it is characterised in that the meter of described step 3
Calculate distribution system operational efficiency disturbance degree indexComprise the steps:
1. calculating every kind equipment operational efficiency disturbance degree index according to step 2, the overall operation efficiency disturbance degree of the i-th kind equipment refers to
It is labeled as
2. calculating every kind equipment total assets and being worth the ratio accounting for distribution system total assets value, the i-th kind equipment assets value accounts for and is
The weight that system total assets is worth is designated as ωi；
3. distribution system operational efficiency disturbance degree index is calculated
7. power distribution network operational efficiency Impact analysis method as claimed in claim 6, it is characterised in that based on each level equipment
Operational efficiency disturbance degree index, with same layer same category of device assets value accounting as weight, design system operational efficiency disturbance degree refers to
Mark computing formula is:
In formula:Running efficiency of system disturbance degree index；
N devices in system level number；
ωiI-th kind equipment assets value accounts for the weight that system total assets is worth；
The operational efficiency disturbance degree index of the i-th kind equipment.
?WithCalculating during, disturbance degree index, i.e. (r are decomposed in the bigger individual event of weighted results0-
rj)·ρj、It is also bigger on the impact of overall operation efficiency index.
8. power distribution network operational efficiency Impact analysis method as claimed in claim 1, it is characterised in that described step 4 includes
Following step:
1. according to distribution system operational efficiency disturbance degree indexResult of calculation, to equipment level disturbance degree index
Carrying out sort descending, the corresponding equipment level of the maximum subitem of desired value is on distribution system operational efficiency impact maximum
Equipment level, the weak link promoting with positioning effects distribution system operational efficiency；
2. according to layer equipment operating efficiency disturbance degree indexResult of calculation, to individual equipment disturbance degree indexCarrying out sort descending, the corresponding equipment of the maximum subitem of desired value is and affects this level equipment operating efficiency
Maximum capital equipment, the weak link promoting with layer equipment operating efficiency with positioning effects.
3. according to equipment operating efficiency disturbance degree indexResult of calculation, to segmentation disturbance degree index (r0-rj)·ρjCarry out
Sort descending, the corresponding running section of the maximum subitem of desired value is the main region maximum on the impact of this equipment operating efficiency
Section, the weak link promoting with positioning effects equipment operating efficiency；
4. according to above analysis result, affect, present in distribution system, the weak link that operational efficiency promotes, on rule
Draw and build and transformation, optimizing operating mode proposes improve target and measure.
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