CN109581130A - A kind of voltage curve similarity calculating method for considering voltage regulating measures and influencing - Google Patents
A kind of voltage curve similarity calculating method for considering voltage regulating measures and influencing Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The present invention provides a kind of voltage curve similarity calculating method that consideration voltage regulating measures influence, the following steps are included: the acquisition of A, distribution transforming related data, the distribution transforming related data includes: the corresponding relationship of 10kV route and distribution transforming, distribution transforming title, distribution transforming address code, distribution transforming three-phase voltage；B, the step A distribution transforming exit potential data obtained are pre-processed；C, it according to the pretreated distribution transforming exit potential data of step B, identifies voltage jump point, voltage curve is segmented；D, according to the voltage curve segmentation result of step C, the similarity of sectional curve is calculated；E, the sectional curve similarity result calculated according to step D, the similarity of the area comprehensive descision Liang Getai voltage curve.Voltage curve similarity when mentioned method can be computed correctly voltage regulating measures through the invention.
Description
Technical field
The present invention relates to distribution transformer running technology field, specifically a kind of voltage for considering voltage regulating measures and influencing
Curve similarity calculation method.
Background technique
When distribution is run, in order to reduce active power loss, balanced load, improve reliability, the network structure to distribution is needed
It is adjusted, the relevant information after network structure regulation in power information acquisition system may not timely update, and usually all be
It goes to verify and update related data, time-consuming, effort by artificial mode.
Applicant propose a kind of verification of distribution topological structure and maintaining method (publication number:
CN107508297A), automatic Verification and the maintenance of distribution topological structure are realized by analysis distribution transforming exit potential curve similarity,
Wherein similarity calculating method is related coefficient.But practical operating experiences show that some areas are mounted with that voltage adjusts equipment,
When coming into operation, it will lead to distribution transforming exit potential and occur skyrocketing or drop suddenly, directly calculate the voltage curve phase in the area Liang Getai at this time
It will lead to calculated result inaccuracy like degree.
Chinese patent (the denomination of invention are as follows: based on the low of voltage curve similarity analysis of Publication No. CN108564485A
Present a theatrical performance as the last item on a programme area's user's phase recognition methods) propose a kind of low-voltage platform area user based on intelligent electric meter voltage curve similarity analysis
Phase recognition methods judge the similarity degree of voltage curve by calculating DTW distance.In Publication No. CN104092481A
State's patent (denomination of invention are as follows: one kind passes through voltage characteristic differentiation Tai Qu and phase method for distinguishing), by by the voltage of node undetermined
The voltage curve of curve and concentrator record carries out similarity-rough set, to determine whether the node belongs to this TV station area, wherein similar
Degree calculation method is correlation coefficient process.Above-mentioned patent is not directed to the voltage curve similarity calculation of voltage regulating measures influence
Method.
Summary of the invention
The present invention provides a kind of voltage curve similarity calculating method that consideration voltage regulating measures influence, and passes through this method
The similarity of the area Liang Getai voltage curve when can be computed correctly voltage regulating measures.
The technical solution adopted by the present invention are as follows:
A kind of voltage curve similarity calculating method for considering voltage regulating measures and influencing, comprising the following steps:
A, the acquisition of distribution transforming related data, the distribution transforming related data includes: the corresponding relationship of 10kV route and distribution transforming is matched
Become title, distribution transforming address code, distribution transforming three-phase voltage；
B, the step A distribution transforming exit potential data obtained are pre-processed；
C, it according to the pretreated distribution transforming exit potential data of step B, identifies voltage jump point, voltage curve is divided
Section；
D, according to the voltage curve segmentation result of step C, the similarity of sectional curve is calculated；
E, the sectional curve similarity result calculated according to step D, the similarity of the area comprehensive descision Liang Getai voltage curve.
Further, distribution transforming exit potential data prediction described in step B, specifically:
The three-phase voltage value of production management system scoring table Qu Yitian, records a point at regular intervals, and whole day is N number of altogether
The data of point, A phase voltage value are Ua1, Ua2……UaN, B phase voltage value is Ub1, Ub2……UbN, C phase voltage value is Uc1,
Uc2……UcN, distribution transforming exit potential U when not considering the influence of three-phase load unbalance is calculated using following formulai:
Wherein Uai、Ubi、UciThe voltage of respectively i-th point A, B, C three-phase, i=1 ... N, UiNot consider three-phase load not
I-th distribution transforming exit potential when the influence of balance, can be in the hope of U by iterative methodi。
Further, the point of voltage jump described in step C recognition methods are as follows:
1) voltage difference that two curves correspond to the moment is calculated；The distribution transforming exit potential in platform area 1 is UT1i, the distribution transforming in platform area 2
Exit potential is UT2i, wherein 96 i=1 ....The area Liang Getai corresponds to the voltage difference U at moment1i；
U1i=UT1i-UT2i, i=1 ... 96
2) variable quantity of the voltage difference is then calculated；The area Liang Getai voltage difference U1iVariation delta U1i；
ΔU1i=U1(i+1)-U1i, i=1 ... 95
3) Normal distribution test is carried out to variable quantity by Kolmogorov-Smirnov and shows do not have if Normal Distribution
Catastrophe point；If disobeying normal distribution, show there is catastrophe point；
4) abnormal point is judged by cabinet figure, identifies the position of voltage jump point.
Further, the similarity of sectional curve is calculated described in step D, specifically:
Assuming that catastrophe point position is respectively k there are two catastrophe points1, k2, due to totally 96 points of voltage curve, according to two
Voltage curve can be divided into three section [0, k by the position of catastrophe point1),[k1,k2),[k2, 96], it calculates separately to obtain this three sections of electricity
Buckle the similarity S of line1, S2, S3。
Further, the similarity of the area step E comprehensive descision Liang Getai voltage curve, specifically: what comparison step D was calculated
Sectional curve similarity S1, S2, S3, it is maximized the voltage curve similarity as the area Liang Getai.
The present invention is based on distribution transforming exit potential history datas, to the platform area exit potential curve for having voltage regulating measures
Catastrophe point identification is carried out, voltage curve is segmented according to voltage jump point position, calculates sectional curve similarity, it can be true
The correctness of voltage curve similarity calculation when possessing voltage regulating measures.
Detailed description of the invention
Fig. 1 is the flow diagram for the voltage curve similarity calculating method that the present invention considers that voltage regulating measures influence；
Fig. 2 is the typical area Liang Getai exit potential curve graph according to the present invention (after being pre-processed by step B)；
Fig. 3 is the Q-Q figure of voltage jump point detection according to the present invention；
Fig. 4 is the cabinet figure of voltage jump point detection according to the present invention.
Specific embodiment
Below in conjunction with the attached drawing in the present invention, the technical solution in the present invention is clearly and completely described.
Fig. 1 is the flow diagram for the voltage curve similarity calculating method that the present invention considers that voltage regulating measures influence,
It is described consider voltage regulating measures influence voltage curve similarity calculating method the following steps are included:
A, the acquisition of distribution transforming related data, the distribution transforming related data includes: the corresponding relationship of 10kV route and distribution transforming is matched
Become title, distribution transforming address code, distribution transforming three-phase voltage；
B, the step A distribution transforming exit potential data obtained are pre-processed
The three-phase voltage value of production management system scoring table Qu Yitian, records a point at regular intervals, and whole day is N number of altogether
The data of point, A phase voltage value are Ua1, Ua2……UaN, B phase voltage value is Ub1, Ub2……UbN, C phase voltage value is Uc1,
Uc2……UcN, distribution transforming exit potential U when not considering the influence of three-phase load unbalance is calculated using following formulai:
Wherein Uai、Ubi、UciThe voltage of respectively i-th point A, B, C three-phase, i=1 ... N, UiNot consider three-phase load not
I-th distribution transforming exit potential when the influence of balance, can be in the hope of U by iterative methodi。
C, it according to the pretreated distribution transforming exit potential data of step B, identifies voltage jump point, voltage curve is divided
Section；
1) voltage difference that two curves correspond to the moment is calculated；The distribution transforming exit potential in platform area 1 is UT1i, the distribution transforming in platform area 2
Exit potential is UT2i, wherein 96 i=1 ....The area Liang Getai corresponds to the voltage difference U at moment1i；
U1i=UT1i-UT2i, i=1 ... 96
2) variable quantity of the voltage difference is then calculated；The area Liang Getai voltage difference U1iVariation delta U1i；
ΔU1i=U1(i+1)-U1i, i=1 ... 95
3) Normal distribution test is carried out to variable quantity by Kolmogorov-Smirnov and shows do not have if Normal Distribution
Catastrophe point；If disobeying normal distribution, show there is catastrophe point；
4) abnormal point is judged by cabinet figure, identifies the position of voltage jump point.
D, according to the voltage curve segmentation result of step C, the similarity of sectional curve is calculated
Assuming that catastrophe point position is respectively k there are two catastrophe points1, k2, due to totally 96 points of voltage curve, according to two
Voltage curve can be divided into three section [0, k by the position of catastrophe point1),[k1,k2),[k2, 96], it calculates separately to obtain this three sections of electricity
Buckle the similarity S of line1, S2, S3。
E, the sectional curve similarity result calculated according to step D, the similarity of the area comprehensive descision Liang Getai voltage curve.
The sectional curve similarity S that comparison step D is calculated1, S2, S3, it is maximized the voltage curve similarity as the area Liang Getai.
Technical solutions and effects of the present invention is described in detail with a specific embodiment below:
In step A, the area Liang Getai (the public friend immigrant Village platform that the public friendly pavilion line of 10kV is supplied is obtained from related system
Area, lower platform where rites are performed area) distribution transforming exit potential data are as shown in the table lower platform where rites are performed area distribution transforming exit potential value:
Table 1 2018 year June, 1 Xia platform where rites are performed area's distribution transforming exit potential value
In step B, distribution transforming exit potential data are pre-processed, when calculating does not consider the influence of three-phase load unbalance
Distribution transforming exit potential is as shown in Figure 2.
In step C, 1) calculate the voltage difference that two curves correspond to the moment；The distribution transforming exit potential in platform area 1 is UT1i, platform
The distribution transforming exit potential in area 2 is UT2i, wherein 96 i=1 ....The area Liang Getai corresponds to the voltage difference U at moment1i；
U1i=UT1i-UT2i, i=1 ... 96
2) variable quantity of the voltage difference is then calculated；The area Liang Getai voltage difference U1iVariation delta U1i；
ΔU1i=U1(i+1)-U1i, i=1 ... 95
3) Normal distribution test is carried out to variable quantity by Kolmogorov-Smirnov, the variable quantity of voltage difference is carried out just
State property is examined, as a result as shown in the table, it can be seen that p value is 0 < 0.05, shows that the variable quantity of voltage difference is disobeyed and just divides very much
Cloth shows that the exit potential in the area You Yigetai in the area Liang Getai has mutation value.The result of Q-Q figure as shown in Figure 3 is also shown not
Normal Distribution.
2 test of normality result of table
4) abnormal point is judged by cabinet figure, identifies the position of voltage jump point.It is sent out by cabinet figure shown in Fig. 4
Existing, there are two catastrophe points, respectively the 19th and 78 data point (the 20th and 79 point of corresponding initial data), according to catastrophe point
Position, voltage curve is divided into three sections, wherein 1-19 is first segment, and 20-78 is second segment, and 79-96 is third section.
In step D, two catastrophe point positions are respectively k1=20, k2=79, therefore according to the position of two catastrophe points, it can
With by voltage curve be divided into three sections [0,20), [and 20,79), [79,96] calculate separately to obtain the similarity of this three sections of voltage curves
S1, S2, S3, wherein representing the size of similarity by calculating related coefficient.
3 related coefficient of table is segmented calculated result
| Calculated result | Related coefficient |
| It is whole | 0.077 |
| First segment | 0.76 |
| Second segment | 0.90 |
| Third section | 0.93 |
In step E, according to the calculated result of step D, it is segmented in similarity, the similarity of third section is up to 0.93, because
The similarity of this two curves is 0.93.
If the method for not using the present invention to be mentioned calculates the similarity of the area Liang Getai voltage outlet curve, directly it is calculated
The area Liang Getai voltage outlet curve similarity be 0.077, calculated result inaccuracy calculates knot using the method that is mentioned of the present invention
Fruit is accurate.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Belong to those skilled in the art in the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of, all answers
It is included within the scope of the present invention.
Claims (5)
1. a kind of voltage curve similarity calculating method for considering voltage regulating measures and influencing, it is characterised in that including following step
It is rapid:
A, the acquisition of distribution transforming related data, the distribution transforming related data includes: the corresponding relationship of 10kV route and distribution transforming, distribution transforming name
Title, distribution transforming address code, distribution transforming three-phase voltage；
B, the step A distribution transforming exit potential data obtained are pre-processed；
C, it according to the pretreated distribution transforming exit potential data of step B, identifies voltage jump point, voltage curve is segmented；
D, according to the voltage curve segmentation result of step C, the similarity of sectional curve is calculated；
E, the sectional curve similarity result calculated according to step D, the similarity of the area comprehensive descision Liang Getai voltage curve.
2. considering the voltage curve similarity calculating method that voltage regulating measures influence as described in claim 1, feature exists
In: distribution transforming exit potential data prediction described in step B, specifically:
The three-phase voltage value of production management system scoring table Qu Yitian, records a point at regular intervals, and whole day is total to N number of point
Data, A phase voltage value are Ua1, Ua2……UaN, B phase voltage value is Ub1, Ub2……UbN, C phase voltage value is Uc1, Uc2……UcN,
Distribution transforming exit potential U when not considering the influence of three-phase load unbalance is calculated using following formulai:
Wherein Uai、Ubi、UciThe voltage of respectively i-th point A, B, C three-phase, i=1 ... N, UiNot consider three-phase load unbalance
I-th distribution transforming exit potential when influence, can be in the hope of U by iterative methodi。
3. considering the voltage curve similarity calculating method that voltage regulating measures influence as described in claim 1, feature exists
In: the point recognition methods of voltage jump described in step C are as follows:
1) voltage difference that two curves correspond to the moment is calculated；The distribution transforming exit potential in platform area 1 is UT1i, the distribution transforming outlet in platform area 2
Voltage is UT2i, wherein 96 i=1 ....The area Liang Getai corresponds to the voltage difference U at moment1i；
U1i=UT1i-UT2i, i=1 ... 96
2) variable quantity of the voltage difference is then calculated；The area Liang Getai voltage difference U1iVariation delta U1i；
ΔU1i=U1(i+1)-U1i, i=1 ... 95
3) Normal distribution test is carried out to variable quantity by Kolmogorov-Smirnov to show not to be mutated if Normal Distribution
Point；If disobeying normal distribution, show there is catastrophe point；
4) abnormal point is judged by cabinet figure, identifies the position of voltage jump point.
4. considering the voltage curve similarity calculating method that voltage regulating measures influence as described in claim 1, feature exists
In: the similarity of sectional curve is calculated described in step D, specifically:
Assuming that catastrophe point position is respectively k there are two catastrophe points1, k2, due to totally 96 points of voltage curve, it is mutated according to two
Voltage curve, can be divided into three section [0, k by the position of point1),[k1,k2),[k2, 96], it calculates separately to obtain this three sections of voltage songs
The similarity S of line1, S2, S3。
5. considering the voltage curve similarity calculating method that voltage regulating measures influence as described in claim 1, feature exists
In: the similarity of the area step E comprehensive descision Liang Getai voltage curve, specifically: the sectional curve similarity that comparison step D is calculated
S1, S2, S3, it is maximized the voltage curve similarity as the area Liang Getai.
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Cited By (5)
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| CN111596232A (en) * | 2020-06-15 | 2020-08-28 | 四川中电启明星信息技术有限公司 | Voltage sequence change point detection-based user variable relationship verification method |
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| CN112564110A (en) * | 2021-02-24 | 2021-03-26 | 国网江西省电力有限公司电力科学研究院 | Transformer area low-voltage treatment method and system |
| CN114123190A (en) * | 2021-11-30 | 2022-03-01 | 广东电网有限责任公司 | Method and device for determining target region to which ammeter belongs, electronic equipment and storage medium |
| CN114152909A (en) * | 2021-11-29 | 2022-03-08 | 国网江苏省电力有限公司营销服务中心 | Medium-high voltage misalignment analysis system based on big data |
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| CN114123190A (en) * | 2021-11-30 | 2022-03-01 | 广东电网有限责任公司 | Method and device for determining target region to which ammeter belongs, electronic equipment and storage medium |
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