CN109886539A - Based on not knowing multiattribute intelligent distribution network self-healing property evaluation method and system - Google Patents
Based on not knowing multiattribute intelligent distribution network self-healing property evaluation method and system Download PDFInfo
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Abstract
The present invention provides be based on not knowing multiattribute intelligent distribution network self-healing property evaluation method and system, comprising: establishes power grid self-healing assessment indicator system, wherein index system includes first class index, two-level index and three-level index；The objective statistical data during operation of power networks are obtained to calculate the numerical value of three-level index according to index system, and objective statistical data are pre-processed；The weight of each three-level index is calculated according to pretreated objective statistical data；Overall merit is carried out to obtain evaluation result to the self-healing property of smart grid according to weight and numerical value.Evaluation method of the invention is comprehensively objective, and has focused on the Project Realization of power grid self-healing property on this basis, and methodological science is reasonable, meaningful to the exploratory development of power grid self-healing level.
Description
Technical field
The present invention relates to technical field of power systems, more particularly, to based on not knowing multiattribute intelligent distribution network self-healing
Property evaluation method and system.
Background technique
Self-healing is the important feature of smart grid, and intension includes self adjusting and optimizing and malfunction under normal condition
Under fault detection, isolation and self-recovery, exception or failure are reduced to power grid with manual intervention few as far as possible to the maximum extent
Influence.Great amount of investment is needed due to improving self-healing property, it is necessary to be evaluated self-healing property bring economic benefit.
Self-healing property evaluation is carried out to intelligent distribution network, the self-healing property of smart grid that both can be more different helps power grid
Investment decision；The self-healing property of power grid different zones can be evaluated simultaneously, show that the self-healing property in which region needs to reinforce.
It is objective to its and comprehensively comment in conclusion less to the evaluation of the self-healing property of intelligent distribution network both at home and abroad at present
Valence is just less, is unfavorable for China currently to the exploration and practice of the benign sound development of smart grid, therefore how to match to intelligence
The self-healing property of power grid is evaluated, and is a problem to be solved.
Summary of the invention
In view of this, the purpose of the present invention is to provide be based on not knowing multiattribute intelligent distribution network self-healing property evaluation side
Method and system, the evaluation method is comprehensively objective, and has focused on the Project Realization of power grid self-healing property on this basis, and methodological science closes
Reason, it is meaningful to the exploratory development of power grid self-healing level.
In a first aspect, the embodiment of the invention provides based on the self-healing property evaluation side for not knowing multiattribute intelligent distribution network
Method, comprising:
Establish power grid self-healing assessment indicator system, wherein the index system includes first class index, two-level index and three
Grade index；
The numerical value of the three-level index is calculated according to the objective statistical data during index system acquisition operation of power networks,
And the objective statistical data are pre-processed；
The weight of each three-level index is calculated according to the pretreated objective statistical data；
Overall merit is carried out to obtain evaluation result to the self-healing property of smart grid according to the weight and the numerical value.
With reference to first aspect, the embodiment of the invention provides the first possible embodiments of first aspect, wherein institute
Stating first class index is power grid self-healing, and the two-level index includes the index based on user, the index based on power grid and base
In the index of society.
The possible embodiment of with reference to first aspect the first, the embodiment of the invention provides second of first aspect
Possible embodiment, wherein the index based on user includes self-healing speed, self-healing rate and the sustainable time covering of self-healing
Rate, the index based on power grid include self-healing control operation complexity and self-healing Meteorological and effect ratio, described to be based on society
The index of meeting includes distributed generation resource access rate.
The possible embodiment of second with reference to first aspect, the embodiment of the invention provides the third of first aspect
Possible embodiment, wherein the self-healing speed is the self-healing speed based on different load classification, and the Overload Class includes
Stringent load, sensitive load and common load, the self-healing speed include first-order rate, second order rate, three step velocitys and level Four
Speed, each Overload Class have corresponded to four kinds of self-healing speed.
With reference to first aspect, the embodiment of the invention provides the 4th kind of possible embodiments of first aspect, wherein institute
It states that the objective statistical data pre-process and includes:
Initial matrix is formed according to the objective statistical data；
Standardization processing is carried out to the initial matrix and obtains normal matrix；
The normal matrix is normalized to obtain normalization matrix.
The 4th kind of possible embodiment with reference to first aspect, the embodiment of the invention provides the 5th kind of first aspect
Possible embodiment, wherein described to calculate each three-level index according to the pretreated objective statistical data
Weight includes:
Calculate comentropy according to the normalization matrix, and according to the comentropy calculate the weight of each three-level index to
Amount.
The 5th kind of possible embodiment with reference to first aspect, the embodiment of the invention provides the 6th kind of first aspect
Possible embodiment, wherein described that overall merit is carried out to the self-healing property of smart grid according to the weight and the numerical value
Include: to obtain evaluation result
Overall merit is carried out according to self-healing property of the multiple attributive decision making method theory to the smart grid.
Second aspect, the embodiment of the invention provides evaluate system based on the self-healing property for not knowing multiattribute intelligent distribution network
System, comprising:
Index system establishes unit, for establishing power grid self-healing assessment indicator system, wherein the index system includes
First class index, two-level index and three-level index；
First computing unit, for obtaining the objective statistical data during operation of power networks according to the index system to calculate
The numerical value of three-level index is stated, and the objective statistical data are pre-processed；
Second computing unit, for calculating the power of each three-level index according to the pretreated objective statistical data
Weight；
Multiattribute assessment unit, for according to the self-healing property of the weight and the numerical value to smart grid carry out overall merit with
Obtain evaluation result.
The present invention provides be based on not knowing multiattribute intelligent distribution network self-healing property evaluation method and system, comprising: builds
Vertical power grid self-healing assessment indicator system, wherein index system includes first class index, two-level index and three-level index；Root
The objective statistical data during operation of power networks are obtained to calculate the numerical value of three-level index according to index system, and to objective statistical number
According to being pre-processed；The weight of each three-level index is calculated according to pretreated objective statistical data；According to weight and numerical value
Overall merit is carried out to obtain evaluation result to the self-healing property of smart grid.The embodiment of the present invention considers oneself under being disturbed respectively
More the self-healing property under property and malfunction considers to take power grid into account to the investment of self-healing property and the society of self-healing property while self-healing property
The Project Realization of self-healing property is focused in meeting benefit, evaluation simultaneously comprehensively.SMART principle is followed to each index, and is provided
The specific preparation method of body, available objective Criterion Attribute.Using uncertain multiattribute assessment method, evaluation can be made to tie
Fruit is more accurate reliable.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention are in specification, claims
And specifically noted structure is achieved and obtained in attached drawing.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is based on not knowing multiattribute intelligent distribution network self-healing property evaluation method process to be provided in an embodiment of the present invention
Figure；
Fig. 2 is index system schematic diagram provided in an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
Currently, less to the self-healing property evaluation of intelligent distribution network both at home and abroad, objective to its and comprehensive evaluation is just less,
Be unfavorable for China currently to the exploration and practice of the benign sound development of smart grid, thus how the self-healing to intelligent distribution network
Property is evaluated, and is a problem to be solved.It is provided in an embodiment of the present invention to be based on not knowing multiattribute intelligence based on this
Power distribution network self-healing property evaluation method and system, evaluation method is comprehensively objective, and has focused on power grid self-healing property on this basis
Project Realization, methodological science is reasonable, meaningful to the exploratory development of power grid self-healing level.
First the technical background of intelligent distribution network self-healing property is further elaborated herein.
Power distribution automation based on communicating, by Intelligent power distribution terminal detect fault message, failure is positioned, every
From and eliminate.By the remote control to intelligent switch, isolated fault is generally required several seconds to tens seconds, and restoring electricity, it is several to generally require
Ten seconds to a few minutes.Technical support is provided for the self-healing of smart grid, also provides data for the evaluation index of self-healing property
Source, the foundation of the index system of the embodiment of the present invention is then based on above-mentioned reality.
Failure can be obtained by transforming plant protecting and fault wave recording device, and load power-off condition can pass through distribution terminal
It is obtained with intelligent electric meter.SCADA system can collect the warning information and power grid of such as voltage out-of-limit when power grid operates normally
The warning information such as action protection caused by failure, switch trip.Therefore, the objective data of the embodiment of the present invention, which obtains, has centainly
Availability.
All primary equipments of electric system in the process of running due to external force, insulation ag(e)ing, overvoltage, maloperation, set
Such as short circuit, broken string failure can occur for the reasons such as meter production defect.Due to being the self-healing evaluation under malfunction, if should
Area is never broken down, and is also just said without self-healing evaluation one, so before carrying out self-healing evaluation, it is necessary to each to smart grid
The fault condition of a part is evaluated.In a series of fault indices of smart grids, failure rate influences most self-healing evaluation
Greatly, most directly.The bigger place of failure rate requires the self-healing property of power grid higher, self-healing of the smaller place of failure rate to power grid
Property require it is lower.Specifically the scheme of the embodiment of the present invention will be illustrated below.
Embodiment one:
Referring to Fig.1, include: based on not knowing multiattribute intelligent distribution network self-healing property evaluation method
Step S101 establishes power grid self-healing assessment indicator system, wherein index system includes that first class index, second level refer to
Mark and three-level index；
Step S102 obtains the objective statistical data during operation of power networks according to index system to calculate the number of three-level index
Value, and objective statistical data are pre-processed；
Step S103 calculates the weight of each three-level index according to pretreated objective statistical data；
Step S104 carries out overall merit to the self-healing property of smart grid according to weight and numerical value to obtain evaluation result.
Specifically, referring to Fig. 2, first class index is power grid self-healing, two-level index include index based on user,
Index based on power grid and the index based on society.Index based on user includes that self-healing speed, self-healing rate and self-healing are sustainable
Time coverage rate, the index based on power grid include self-healing control operation complexity and self-healing Meteorological and effect ratio, are based on society
The index of meeting includes distributed generation resource access rate.Here, for society since self-healing property improves stability, distribution is improved
The online (micro-capacitance sensor) of power supply.Meanwhile the distributed generation resource that smart grid is received is more, requires to get over to the self-healing ability of the power grid
Height can also reflect the self-healing property quality of power grid to a certain extent.
It should be noted that self-healing speed is the self-healing speed based on different load classification, Overload Class includes stringent negative
Lotus, sensitive load and common load, self-healing speed include first-order rate, second order rate, three step velocitys and four step velocitys, are each born
Lotus classification has all corresponded to four kinds of self-healing speed.
Self-healing speed (language type): in view of influence degree of the fault time to different load is different, load is divided into general
Logical load, sensitive load and stringent load.Common load refers to loss and the lesser load of social influence caused by power failure, such as
General lighting, household electrical appliance etc.；Sensitive load refers to that the several cycles of power failure can be to the load that it is impacted, such as frequency conversion tune
Speed variator etc..Stringent load refers to especially high to power reguirements, occurs what a cycle power failure will cause it to seriously affect
Load, such as the computer system of bank and security center.
The self-healing speed that different load requires is different, also just different to the self-healing speed evaluation index of different load.It will
Self-healing speed index is divided into level Four: first-order rate (Millisecond, a cycle in self-healing), second order rate (all wave scales, a cycle with
On, within a few tens of milliseconds), three step velocitys (second grade, self-healing in several seconds), four step velocitys (minute grade, self-healing in 3 minutes).It can
To find out, restore in first-order rate, it is little to stringent loading effects；Restoring in second order rate, stringent load is affected,
Sensitive load is influenced little；Restore in three step velocitys, sensitive load is affected；Restore in four step velocitys, influences quick
Feel the normal operation of load.If without self-healing in four step velocitys, then it is assumed that not self-healing.It can be obtained by fault wave recording device
Self-healing spends the time.Table 1 is Overload Class and the corresponding self-healing speed evaluation table of comparisons.
1 Overload Class of table and the corresponding self-healing speed evaluation table of comparisons
The calculating of self-healing rate (profit evaluation model) needs to consider the important level of load, payload.The sustainable time coverage rate of self-healing
(profit evaluation model) is then when breaking down, and micro-capacitance sensor may be still grid-connected, it is also possible to off-grid operation.In off-grid operation, need
Consider the sustainable operation time of microgrid.Self-healing control operation complexity (cost type) is measured with on-off times, switch
Number is more, and self-healing operation is more complicated, can more shorten service life of equipment.Self-healing Meteorological and effect ratio (cost type) are then certainly
More the loss of reduction/self-healing equipment investment expense.Distributed generation resource access rate (profit evaluation model) is then the micro-capacitance sensor in period demand
Middle peak load/system peak load.
Specifically, the calculation formula of self-healing rate is as follows:
(1)
Wherein,、、The weight coefficient of each stage load is represented,、、Each stage load actually restored is represented,、、Each stage load is represented to existThe original loads demand at moment.Representing allows the self-healing time, is set as 3min.
Further, carrying out pretreatment to objective statistical data includes:
Initial matrix is formed according to objective statistical data；
Standardization processing is carried out to initial matrix and obtains normal matrix；
Normal matrix is normalized to obtain normalization matrix.
Further, step S103 includes:
Comentropy is calculated according to normalization matrix, and calculates the weight vectors of each three-level index according to comentropy.
It should be noted that the embodiment of the present invention is based on uncertain multiattribute assessment method, for weight and attribute value
It is the index of real number using based on the multiattribute assessment method for improving entropy assessment.
Although entropy assessment is objective and strong applicability, when all entropy are close to 1, even if small gap can all draw
Entropy weight is played into the variation of multiple, has deviated from the literal sense of entropy assessment, therefore the weight of the embodiment of the present inventionCalculating do and change as follows
Into.
(2)
Wherein,Indicate theThe entropy of a index,It is the average value of all entropy for not being 1.
(3)
(4)
Multiattribute assessment side based on LWM operator is used for the index (self-healing speed index) that weight and attribute value are language
Method.
IfWithRespectively scheme collection and property set.Estimator provides schemeIn attributeUnder language comment
Valuation, and obtain language assessment matrix, the weight vectors of attribute are。
Using LWM operator to evaluating matrixInCapable language assessment information is assembled, and decision scheme is obtainedIt is comprehensive
Close attribute evaluation value:。
The present invention provides be based on not knowing multiattribute intelligent distribution network self-healing property evaluation method, comprising: establishes intelligence
Power grid self-healing property assessment indicator system, wherein index system includes first class index, two-level index and three-level index；According to index
System obtains the objective statistical data during operation of power networks to calculate the numerical value of three-level index, and carries out to objective statistical data
Pretreatment；The weight of each three-level index is calculated according to pretreated objective statistical data；According to weight and numerical value to intelligence
The self-healing property of power grid carries out overall merit to obtain evaluation result.Evaluation method of the invention is comprehensively objective, and on this basis
The Project Realization of power grid self-healing property is focused on, methodological science is reasonable, has meaning to the exploratory development of power grid self-healing level
Justice.
Embodiment two:
Include: based on multiattribute intelligent distribution network self-healing property evaluation system is not known
Index system establishes unit, for establishing power grid self-healing assessment indicator system, wherein index system includes level-one
Index, two-level index and three-level index；
First computing unit is referred to for obtaining the objective statistical data during operation of power networks according to index system with calculating three-level
Target numerical value, and objective statistical data are pre-processed；
Second computing unit, for calculating the weight of each three-level index according to pretreated objective statistical data；
Multiattribute assessment unit, for carrying out overall merit to the self-healing property of smart grid according to weight and numerical value to be evaluated
As a result.
It is provided in an embodiment of the present invention to be based on not knowing multiattribute intelligent distribution network self-healing property evaluation system, with above-mentioned reality
Apply example offer based on not knowing multiattribute intelligent distribution network self-healing property evaluation method technical characteristic having the same, so
It can solve identical technical problem, reach identical technical effect.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description
It with the specific work process of device, can refer to corresponding processes in the foregoing method embodiment, details are not described herein.
In addition, term " first ", " second ", " third " are used for description purposes only, it is not understood to indicate or imply phase
To importance.
Finally, it should be noted that embodiment described above, only a specific embodiment of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, those skilled in the art should understand that: anyone skilled in the art
In the technical scope disclosed by the present invention, it can still modify to technical solution documented by previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover in protection of the invention
Within the scope of.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. one kind is based on not knowing multiattribute intelligent distribution network self-healing property evaluation method characterized by comprising
Establish power grid self-healing assessment indicator system, wherein the index system includes first class index, two-level index and three
Grade index；
The numerical value of the three-level index is calculated according to the objective statistical data during index system acquisition operation of power networks,
And the objective statistical data are pre-processed；
The weight of each three-level index is calculated according to the pretreated objective statistical data；
Overall merit is carried out to obtain evaluation result to the self-healing property of smart grid according to the weight and the numerical value.
2. according to claim 1 based on multiattribute intelligent distribution network self-healing property evaluation method is not known, feature exists
In the first class index is power grid self-healing, and the two-level index includes the index based on user, the finger based on power grid
It marks and based on social index.
3. according to claim 2 based on multiattribute intelligent distribution network self-healing property evaluation method is not known, feature exists
In, the index based on user include self-healing speed, self-healing rate and the sustainable time coverage rate of self-healing, it is described based on power grid
Index includes self-healing control operation complexity and self-healing Meteorological and effect ratio, and the index based on society includes distribution
Plant-grid connection rate.
4. according to claim 3 based on multiattribute intelligent distribution network self-healing property evaluation method is not known, feature exists
In the self-healing speed is the self-healing speed based on different load classification, and the Overload Class includes stringent load, sensitive load
With common load, the self-healing speed includes first-order rate, second order rate, three step velocitys and four step velocitys.
5. according to claim 1 based on multiattribute intelligent distribution network self-healing property evaluation method is not known, feature exists
In, it is described to the objective statistical data carry out pretreatment include:
Initial matrix is formed according to the objective statistical data；
Standardization processing is carried out to the initial matrix and obtains normal matrix；
The normal matrix is normalized to obtain normalization matrix.
6. according to claim 5 based on multiattribute intelligent distribution network self-healing property evaluation method is not known, feature exists
In the weight for calculating each three-level index according to the pretreated objective statistical data includes:
Calculate comentropy according to the normalization matrix, and according to the comentropy calculate the weight of each three-level index to
Amount.
7. according to claim 6 based on multiattribute intelligent distribution network self-healing property evaluation method is not known, feature exists
In described to carry out overall merit to the self-healing property of smart grid according to the weight and the numerical value to obtain evaluation result packet
It includes:
Overall merit is carried out according to self-healing property of the multiple attributive decision making method theory to the smart grid.
8. one kind is based on not knowing multiattribute intelligent distribution network self-healing property evaluation system characterized by comprising
Index system establishes unit, for establishing power grid self-healing assessment indicator system, wherein the index system includes
First class index, two-level index and three-level index；
First computing unit, for obtaining the objective statistical data during operation of power networks according to the index system to calculate
The numerical value of three-level index is stated, and the objective statistical data are pre-processed；
Second computing unit, for calculating the power of each three-level index according to the pretreated objective statistical data
Weight；
Multiattribute assessment unit, for according to the self-healing property of the weight and the numerical value to smart grid carry out overall merit with
Obtain evaluation result.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112016838A (en) * | 2020-08-31 | 2020-12-01 | 广东电网有限责任公司 | Method and system for calculating contribution rate of power distribution network energy efficiency index system and terminal equipment |
| CN113055237A (en) * | 2021-05-12 | 2021-06-29 | 广东电网有限责任公司 | Distribution network main station cooperative self-healing reliability determination method and device and storage medium |
| CN113131615A (en) * | 2021-04-20 | 2021-07-16 | 广东电网有限责任公司 | Self-healing technology evaluation method and system for distribution network master station |
-
2019
- 2019-01-11 CN CN201910026323.0A patent/CN109886539A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112016838A (en) * | 2020-08-31 | 2020-12-01 | 广东电网有限责任公司 | Method and system for calculating contribution rate of power distribution network energy efficiency index system and terminal equipment |
| CN113131615A (en) * | 2021-04-20 | 2021-07-16 | 广东电网有限责任公司 | Self-healing technology evaluation method and system for distribution network master station |
| CN113055237A (en) * | 2021-05-12 | 2021-06-29 | 广东电网有限责任公司 | Distribution network main station cooperative self-healing reliability determination method and device and storage medium |
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Application publication date: 20190614 |