CN107944747A - A kind of low-voltage platform area evaluation method based on improvement principal component analysis - Google Patents
A kind of low-voltage platform area evaluation method based on improvement principal component analysis Download PDFInfo
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Abstract
The invention discloses a kind of based on the low-voltage platform area evaluation method for improving principal component analytical method, comprise the following steps：S1：Establish low-voltage platform area evaluation index model；S2：Obtain the corresponding data of each taiwan area index in the low-voltage platform area evaluation index set；S3：Establish and improve Principal Component Analysis Algorithm model, principal component number is determined according to the achievement data of collection and calculates the comprehensive score of each low-voltage platform area；S4：According to the comprehensive score of each low-voltage platform area, overall merit is carried out to all taiwan areas using clustering algorithm.The present invention can not only eliminate the correlation between index, and avoid the evaluation result caused by subjective really power and disturb, and realize objective, science evaluation；Meanwhile taiwan area comprehensive grading is analyzed using system clustering algorithm, numerous taiwan areas can be layered so that evaluation result is clearly clear, and is convenient for the conceptual design of investment transformation.
Description
Technical field
The present invention relates to a kind of based on the low-voltage platform area evaluation method for improving principal component analysis, belong to 400V low-voltage platform areas fortune
Row administrative evaluation field.
Background technology
With the continuous continuing fermentation promoted with energy internet of new round power system reform, new environment is to battalion
The development of the links such as pin, scheduling, distribution proposes the requirement of higher, and most basic unit -- taiwan area of powering, and physically connects
Power generation and electricity consumption are connect, is the last leg that electricity commodity delivers user.Therefore, taiwan area is evaluated good with management method
Bad, the development to power supply enterprise plays important influence with management.
The research of the appraisal procedure of power distribution network at present is assessed mainly around high, medium voltage distribution network, for low-voltage distribution
Net is that the appraisal procedure of taiwan area and case are still in infancy.Traditional power grid index Evaluation Method and the main base of appraisement system
In the subjective synthesis evaluation assessment such as analytic hierarchy process (AHP), expert graded, this kind of method can make full use of the actual work of tradesman
Make experience, and implement simple and practicable.Subjective integrated evaluating method is although simple and practicable, but often ignores data sheet
Dependency relation between the characteristic and evaluation index of body.It is large number of in view of the evaluation index of actual taiwan area, to all
Index is all evaluated not only time-consuming and laborious, but also with the presence of the related overlapping of part index number data, have impact on final scoring
It is accurate objective, therefore, reduce appraisement system index amount, eliminate index between correlation for build science objective appraisal
System is particularly important.
The content of the invention
Goal of the invention：A kind of low-voltage platform area evaluation method based on improvement principal component analysis is provided, index can be eliminated
Between correlation, the evaluation result caused by subjective really power can be avoided and disturbed, be a kind of to have objectivity and science concurrently
Evaluation model.
In order to solve the above technical problems, the technical solution adopted in the present invention is as follows：
A kind of low-voltage platform area evaluation method based on improvement principal component analysis, comprises the following steps：
S1：Establish low-voltage platform area evaluation index model；
S2：Obtain the corresponding data of each taiwan area index in the low-voltage platform area evaluation index set；
S3：Establish and improve Principal Component Analysis Algorithm model, principal component number is determined according to the achievement data of collection and is calculated
The comprehensive score of each low-voltage platform area；
S4：According to the comprehensive score of each low-voltage platform area, overall merit is carried out to all taiwan areas using clustering algorithm.
In order to improve evaluation accuracy, it is preferable that the step S1 is specifically included：Low-voltage platform area is analyzed by analytic hierarchy process (AHP)
Efficiency, obtains the first class index of the low-voltage platform area index set；The low-voltage platform area first class index is decomposed to obtain described low
The low-voltage platform area two-level index presented a theatrical performance as the last item on a programme under area's first class index, the low-voltage platform area first class index and low-voltage platform area two-level index are formed
Low-voltage platform area evaluation index model.
In order to ensure the comprehensive of evaluation, it is preferable that the low-voltage platform area first class index includes：Taiwan area characteristic index, load
Horizontal index, economic benefits indicator and power supply capacity index；The low-voltage platform area two-level index includes：Platform varying capacity, taiwan area half
Footpath, insulation rate, maximum load rate, Rate of average load, delivery, electricity sales amount, line loss per unit, tri-phase unbalance factor, power supply are reliable
Rate, rate of qualified voltage and average power factor.
It is above-mentioned to be based on four low-voltage platform area taiwan area characteristic, load level, economic benefit and power supply capacity aspects, pass through layer
Fractional analysis obtains 4 first class index and 12 two-level index of taiwan area, obtains comprehensive low-voltage platform area efficiency evaluation model.
In order to improve evaluation accuracy, it is preferable that in the step S3, data normalization is replaced using centralized logarithm,
Establish and improve Principal Component Analysis Algorithm model, principal component number is then determined according to the achievement data of collection, calculates each low pressure
The comprehensive score of taiwan area.
The centralized logarithm computational methods are：
Wherein, p is the low-voltage platform area two-level index number, and n is the low-voltage platform area number, xijFor the low-voltage platform area
In i-th of taiwan area j-th of index value, yijFor the xijNumerical value after centralized logarithm.
In order to improve evaluation accuracy, it is preferable that the specific steps for improving Principal Component Analysis Algorithm include：
S31：By the index value obtained in the S2 generation initial matrix X；
S32：Initial matrix X is handled using the method for the centralized logarithm, generates new matrix Y；
S33：Correlation matrix is established according to the matrix Y, and calculates characteristic value and feature vector；
S34：Calculate each characteristic value and obtain variance contribution ratio and contribution rate of accumulative total, when contribution rate of accumulative total is more than 85%, determine
The number of principal component；
S35：Calculate the score and comprehensive score of each principal component.
In order to improve evaluation accuracy, it is preferable that in the step S4, the low-voltage platform is handled using the method for Hierarchical Clustering
The comprehensive score in area, low-voltage platform area is gathered for 3 classes, and the higher one kind of comprehensive score, its low-voltage platform area efficiency is better, correspondingly,
Comprehensive score is lower, its efficiency is poorer.
The unmentioned technology of the present invention is with reference to the prior art.
The present invention can not only eliminate the correlation between index based on the low-voltage platform area evaluation method for improving principal component analysis
Property, and avoid the evaluation result caused by subjective really power and disturb, realize objective, science evaluation；Meanwhile gathered using system
Class algorithm analyzes taiwan area comprehensive grading, can be layered numerous taiwan areas so that evaluation result is clearly clear, just
In the conceptual design for carrying out investment transformation.
Brief description of the drawings
Fig. 1 is the flow chart of low-voltage platform area evaluation method provided in an embodiment of the present invention；
Fig. 2 is comprehensive evaluation index model in low-voltage platform area provided in an embodiment of the present invention；
Fig. 3 is improvement Principal Component Analysis Algorithm model provided in an embodiment of the present invention；
Fig. 4 is the system clustering tree of 51 taiwan areas provided in an embodiment of the present invention.
Embodiment
For a better understanding of the present invention, with reference to the embodiment content that the present invention is furture elucidated, but the present invention
Content is not limited solely to the following examples.
The embodiment of the present invention discloses a kind of low-voltage platform area evaluation method based on improvement principal component analysis, as shown in Figure 1, bag
Include following steps：S1：Establish low-voltage platform area evaluation index model；S2：Obtain each in the low-voltage platform area evaluation index set
The corresponding data of taiwan area index；S3：Establish and improve Principal Component Analysis Algorithm model, principal component is determined according to the achievement data of collection
Number and the comprehensive score for calculating each low-voltage platform area；S4：According to the comprehensive score of each low-voltage platform area, calculated using cluster
Method carries out overall merit to all taiwan areas.
As shown in Fig. 2, analyzing low-voltage platform area efficiency by analytic hierarchy process (AHP), the one of the low-voltage platform area index set is obtained
Level index, the low-voltage platform area first class index include：Taiwan area characteristic index, load level index, economic benefits indicator and power supply
Capacity index.
The low-voltage platform area first class index is decomposed to obtain the low-voltage platform area two level under the low-voltage platform area first class index and is referred to
Mark, in the first class index, taiwan area characteristic index covers platform varying capacity, taiwan area radius and insulation rate, load level index
Maximum load rate, Rate of average load are covered, economic benefits indicator covers delivery, electricity sales amount, line loss per unit, and power supply capacity refers to
Mark covers tri-phase unbalance factor, power supply reliability, rate of qualified voltage and average power factor.Above-mentioned low-voltage platform area level-one refers to
Mark and low-voltage platform area two-level index form low-voltage platform area comprehensive evaluation model.
As shown in table 1, it is used as example using 51 low-voltage platform area data.
Table 1 is the data of 51 low-voltage platform areas provided in an embodiment of the present invention, 12 two-level index
Data normalization is replaced using centralized logarithm, establishes and improves Principal Component Analysis Algorithm model, then basis is adopted
The achievement data of collection determines principal component number, calculates the comprehensive score of each low-voltage platform area.
As shown in figure 3, improving the specific steps of Principal Component Analysis Algorithm includes：S31：The index number that will be obtained in the S2
Value generation initial matrix X；S32：Initial matrix X is handled using the method for the centralized logarithm, generates new matrix Y；S33：
Correlation matrix is established according to the matrix Y, and calculates characteristic value and feature vector；S34：Calculate each characteristic value and obtain variance tribute
Rate and contribution rate of accumulative total are offered, when contribution rate of accumulative total is more than 85%, determines the number of principal component；S35：Calculate obtaining for each principal component
Point and comprehensive score.
Further, in step S32, centralized logarithm computational methods are：
Wherein, p is the low-voltage platform area two-level index number, and n is the low-voltage platform area number, xijFor the low-voltage platform area
In i-th of taiwan area j-th of index value, yijFor the xijNumerical value after centralized logarithm.
The comprehensive score of 51 low-voltage platform areas can be obtained according to above-mentioned improvement Principal Component Analysis Algorithm model, such as the institute of table 2
Show.
Table 2 is the comprehensive score of 51 low-voltage platform areas provided in an embodiment of the present invention
The comprehensive score of the low-voltage platform area is handled using the method for Hierarchical Clustering, low-voltage platform area is gathered for 3 classes, comprehensive
Divide higher one kind, its low-voltage platform area efficiency is better, and accordingly, comprehensive score is lower, its efficiency is poorer.
As shown in table 3 and fig. 4, cluster the result shows that, the 3rd class taiwan area belong to scoring it is highest, the 2nd class belongs to medium,
1st class belongs to worst.Therefore, which need to strengthen the reform strengthening to the 1st class taiwan area.
Table 3 for 51 low-voltage platform area comprehensive scores provided in an embodiment of the present invention gather be three classes result；
The present invention overcomes lacking for traditional evaluation method subjectivity based on the low-voltage platform area evaluation method for improving principal component analysis
Point, solves the problems, such as index relative influence evaluation result, and this method is simple and practicable, can provide clear division low-voltage platform region layer
It is secondary, easy to design the scheme of investment transformation.
Claims (7)
- It is 1. a kind of based on the low-voltage platform area evaluation method for improving principal component analysis, it is characterised in that：Comprise the following steps：S1：Establish low-voltage platform area evaluation index model；S2：Obtain the corresponding data of each taiwan area index in the low-voltage platform area evaluation index set；S3：Establish and improve Principal Component Analysis Algorithm model, principal component number is determined according to the achievement data of collection and is calculated each The comprehensive score of low-voltage platform area；S4：According to the comprehensive score of each low-voltage platform area, overall merit is carried out to all taiwan areas using clustering algorithm.
- 2. according to the method described in claim 1, it is characterized in that：The step S1 is specifically included：Pass through analytic hierarchy process (AHP) point Low-voltage platform area efficiency is analysed, obtains the first class index of the low-voltage platform area index set；The low-voltage platform area first class index is decomposed Obtain the low-voltage platform area two-level index under the low-voltage platform area first class index, the low-voltage platform area first class index and low-voltage platform area two Level index forms low-voltage platform area evaluation index model.
- 3. according to the method described in claim 2, it is characterized in that：The low-voltage platform area first class index includes：Taiwan area characteristic refers to Mark, load level index, economic benefits indicator and power supply capacity index；The low-voltage platform area two-level index includes：Platform varying capacity, Taiwan area radius, insulation rate, maximum load rate, Rate of average load, delivery, electricity sales amount, line loss per unit, tri-phase unbalance factor, confession Electric reliability, rate of qualified voltage and average power factor.
- 4. according to the method described in claim 1, it is characterized in that：In the step S3, number is replaced using centralized logarithm According to standardization, establish and improve Principal Component Analysis Algorithm model, principal component number is then determined according to the achievement data of collection, calculate The comprehensive score of each low-voltage platform area.
- 5. according to the method described in claim 4, it is characterized in that：The centralized logarithm computational methods are：<mrow> <msub> <mi>y</mi> <mrow> <mi>i</mi> <mi>j</mi> </mrow> </msub> <mo>=</mo> <mi>l</mi> <mi>n</mi> <mi> </mi> <msub> <mi>x</mi> <mrow> <mi>i</mi> <mi>j</mi> </mrow> </msub> <mo>-</mo> <mfrac> <mn>1</mn> <mi>p</mi> </mfrac> <munderover> <mo>&Sigma;</mo> <mrow> <mi>k</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>p</mi> </munderover> <mi>ln</mi> <mi> </mi> <msub> <mi>x</mi> <mrow> <mi>i</mi> <mi>k</mi> </mrow> </msub> <mo>=</mo> <mi>l</mi> <mi>n</mi> <mfrac> <msub> <mi>x</mi> <mrow> <mi>i</mi> <mi>j</mi> </mrow> </msub> <msup> <mrow> <mo>(</mo> <munderover> <mo>&Pi;</mo> <mrow> <mi>k</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>p</mi> </munderover> <msub> <mi>x</mi> <mrow> <mi>i</mi> <mi>k</mi> </mrow> </msub> <mo>)</mo> </mrow> <mrow> <mn>1</mn> <mo>/</mo> <mi>n</mi> </mrow> </msup> </mfrac> <mo>,</mo> <mi>i</mi> <mo>=</mo> <mn>1</mn> <mo>,</mo> <mn>2</mn> <mo>,</mo> <mo>...</mo> <mo>,</mo> <mi>n</mi> <mo>,</mo> <mi>j</mi> <mo>=</mo> <mn>1</mn> <mo>,</mo> <mn>2</mn> <mo>,</mo> <mo>...</mo> <mo>,</mo> <mi>p</mi> </mrow>Wherein, p is the low-voltage platform area two-level index number, and n is the low-voltage platform area number, xijFor in the low-voltage platform area J-th of index value of i taiwan area, yijFor the xijNumerical value after centralized logarithm.
- 6. according to the method described in claim 4, it is characterized in that：The specific steps bag for improving Principal Component Analysis Algorithm Include：S31：By the index value obtained in the S2 generation initial matrix X；S32：Initial matrix X is handled using the method for the centralized logarithm, generates new matrix Y；S33：Correlation matrix is established according to the matrix Y, and calculates characteristic value and feature vector；S34：Calculate each characteristic value and obtain variance contribution ratio and contribution rate of accumulative total, when contribution rate of accumulative total be more than 85% when, determine it is main into The number divided；S35：Calculate the score and comprehensive score of each principal component.
- 7. according to the method described in claim 1, it is characterized in that：In the step S4, handled using the method for Hierarchical Clustering The comprehensive score of the low-voltage platform area, low-voltage platform area is gathered and is got over for 3 classes, the higher one kind of comprehensive score, its low-voltage platform area efficiency Good, correspondingly, comprehensive score is lower, its efficiency is poorer.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109444791A (en) * | 2018-11-09 | 2019-03-08 | 华中科技大学 | A kind of capacitance type potential transformer error state appraisal procedure and system |
| CN109634940A (en) * | 2018-11-12 | 2019-04-16 | 国网天津市电力公司电力科学研究院 | A kind of typical low pressure platform area's electricity consumption model building method based on magnanimity low-voltage platform area electricity consumption data |
| CN109740872A (en) * | 2018-12-18 | 2019-05-10 | 国网山西省电力公司长治供电公司 | The diagnostic method and system of a kind of area's operating status |
| CN111221778A (en) * | 2020-04-14 | 2020-06-02 | 广东电网有限责任公司佛山供电局 | Matching method for low-voltage user and distribution room membership |
| CN111507579A (en) * | 2020-03-26 | 2020-08-07 | 国网四川省电力公司电力科学研究院 | Clustering-method-based full-class voltage transformer operation performance evaluation method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444791A (en) * | 2018-11-09 | 2019-03-08 | 华中科技大学 | A kind of capacitance type potential transformer error state appraisal procedure and system |
| CN109634940A (en) * | 2018-11-12 | 2019-04-16 | 国网天津市电力公司电力科学研究院 | A kind of typical low pressure platform area's electricity consumption model building method based on magnanimity low-voltage platform area electricity consumption data |
| CN109740872A (en) * | 2018-12-18 | 2019-05-10 | 国网山西省电力公司长治供电公司 | The diagnostic method and system of a kind of area's operating status |
| CN111507579A (en) * | 2020-03-26 | 2020-08-07 | 国网四川省电力公司电力科学研究院 | Clustering-method-based full-class voltage transformer operation performance evaluation method |
| CN111221778A (en) * | 2020-04-14 | 2020-06-02 | 广东电网有限责任公司佛山供电局 | Matching method for low-voltage user and distribution room membership |
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