CN105512803B - Processing method and processing device of power data - Google Patents

Processing method and processing device of power data Download PDF

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CN105512803B
CN105512803B CN201510847572.8A CN201510847572A CN105512803B CN 105512803 B CN105512803 B CN 105512803B CN 201510847572 A CN201510847572 A CN 201510847572A CN 105512803 B CN105512803 B CN 105512803B
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current value
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preset
power supply
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CN105512803A (en
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尹璐
张凯
李雪男
吴振升
舒彬
任雪桂
孙昕
张欣
马雪峰
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State Grid Corp of China SGCC
Beijing Jiaotong University
State Grid Beijing Electric Power Co Ltd
Economic and Technological Research Institute of State Grid Beijing Electric Power Co Ltd
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State Grid Corp of China SGCC
Beijing Jiaotong University
State Grid Beijing Electric Power Co Ltd
Economic and Technological Research Institute of State Grid Beijing Electric Power Co Ltd
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Abstract

The invention discloses a processing method and a processing device for power data. Wherein, the method comprises the following steps: the method comprises the steps of obtaining a first image according to a current value on a power supply line acquired by a current transformer, processing the first image according to an interpolation method to obtain a second image, further determining whether a current value characteristic corresponding to the second image accords with a preset current value characteristic, and sending alarm information if the current value characteristic corresponding to the second image does not accord with the preset current value characteristic, wherein the alarm information is used for indicating that the power supply line is abnormal. The method solves the technical problems that information loss and graphic distortion caused by a scatter diagram cannot be avoided in the related technology, and further subway load characteristics at any moment cannot be accurately judged.

Description

Processing method and processing device of power data
Technical Field
The invention relates to the field of electric power, in particular to a method and a device for processing electric power data.
Background
Subway loads are important urban distribution network loads, and a large amount of load data can be generated at every moment and are the basis of load analysis. However, the load data of one hand is not suitable for direct analysis, so a data processing method is needed. At present, subway load processing and analysis are based on a discretization load scatter diagram, and the method has the following defects: (1) the discrete points can bring about the problem of insufficient precision; (2) a huge number of load points also occupy excessive storage space; (3) different step sizes will have different accuracies, which will affect the versatility and standardization of the various analysis processing algorithms.
In summary, because the load data acquired by the subway is scatter data and has a certain step interval, the data are directly subjected to modeling, analysis and other work, and the actual load characteristics of the subway locomotive cannot be accurately represented. Therefore, information loss and graphic distortion caused by a scatter diagram cannot be avoided in the related technology, and further subway load characteristics at any time cannot be accurately judged.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
the embodiment of the invention provides a processing method and a processing device of power data, and at least solves the technical problems that information loss and graphic distortion caused by a scatter diagram cannot be avoided in the related technology, and further subway load characteristics at any time cannot be accurately judged.
According to an aspect of an embodiment of the present invention, there is provided a method for processing power data, including: the method comprises the steps of obtaining a first image according to a current value on a power supply line acquired by a current transformer, processing the first image according to an interpolation method to obtain a second image, further determining whether a current value characteristic corresponding to the second image accords with a preset current value characteristic, and sending alarm information if the current value characteristic corresponding to the second image does not accord with the preset current value characteristic, wherein the alarm information is used for indicating that the power supply line is abnormal.
Further, processing the first image according to an interpolation method to obtain a second image includes: and processing the first image according to a segmented cubic interpolation method to obtain a second image.
Further, processing the first image according to a piecewise cubic interpolation method to obtain a second image includes: processing the first image according to a first preset formula corresponding to the segmented cubic interpolation method to obtain a second image, wherein the first preset formula isαj(x) Is a first basis function of a first predetermined formula, betaj(x) Is the second basis function of the first predetermined formula, yjIs a first coefficient of a first predetermined formula, mja second coefficient of the first predetermined formula, and H2n+1(x) Is alphaj(x) And betaj(x) Linear combinations of (3).
Further, processing the first image according to a piecewise cubic interpolation method to obtain a second image further includes: processing the first image according to a second preset formula corresponding to the segmented cubic interpolation method to obtain a second image, wherein the second preset formula isx∈[a,b]，R3(x) Is a second predetermined formulaInterpolation remainder of hkIs the error step length of a second predetermined formula, f(4)(x) Is the fourth higher derivative of the interpolated function of the second predetermined formula, x is the interpolation point of the second predetermined formula, a is the first constant value of the second predetermined formula, and b is the second constant value of the second predetermined formula.
Further, obtaining a first image according to a current value on a power supply line collected by the current transformer includes: obtaining a scatter diagram of the current value according to the current value; processing the first image according to an interpolation method to obtain a second image comprises: and processing the scatter diagram of the current value according to an interpolation method to obtain a continuous curve chart of the current value.
further, determining whether the current value characteristic corresponding to the second image meets the preset current value characteristic comprises: acquiring a current maximum value and a current minimum value corresponding to the second image; judging whether the difference value of the maximum current value and the minimum current value is not greater than a preset threshold value or not; and if the difference value is not larger than the preset threshold value, determining that the current value characteristic corresponding to the second image accords with the preset current value characteristic.
Furthermore, the power supply line is an urban rail transit power supply line.
According to another aspect of the embodiments of the present invention, there is also provided a processing apparatus of power data, including: the obtaining unit 20 obtains a first image according to a current value on a power supply line acquired by a current transformer, wherein the current transformer is arranged on the power supply line, the first processing unit 22 processes the first image according to an interpolation method to obtain a second image, the judging unit 24 determines whether a current value characteristic corresponding to the second image meets a preset current value characteristic, and the early warning unit 26 sends warning information under the condition that the current value characteristic corresponding to the second image does not meet the preset current value characteristic, wherein the warning information is used for indicating that the power supply line is abnormal.
Further, the first processing unit includes: and the acquisition module is used for processing the first image according to the segmented cubic interpolation method to obtain a second image.
Further, the acquisition module includes: a first calculation module for performing cubic interpolation according to the segmentsProcessing the first image to obtain a second image: processing the first image according to a first preset formula corresponding to the segmented cubic interpolation method to obtain a second image, wherein the first preset formula isαj(x) Is a first basis function of a first predetermined formula, betaj(x) Is the second basis function of the first predetermined formula, yjIs a first coefficient of a first predetermined formula, mjA second coefficient of the first predetermined formula, and H2n+1(x) Is alphaj(x) And betaj(x) Linear combinations of (3).
Further, the acquisition module includes: a second calculation module to: processing the first image according to a second preset formula corresponding to the segmented cubic interpolation method to obtain a second image, wherein the second preset formula isx∈[a,b]，R3(x) Is an interpolation remainder of a second predetermined formula, hkis the error step length of a second predetermined formula, f(4)(x) Is the fourth higher derivative of the interpolated function of the second predetermined formula, x is the interpolation point of the second predetermined formula, a is the first constant value of the second predetermined formula, and b is the second constant value of the second predetermined formula.
Further, the acquisition unit includes: the first obtaining module is used for obtaining a scatter diagram of the current value according to the current value; the first processing unit includes: a second obtaining module, configured to process the first image according to an interpolation method to obtain a second image: and processing the scatter diagram of the current value according to an interpolation method to obtain a continuous curve chart of the current value.
Further, the judging unit includes: the sub-acquisition module is used for acquiring a current maximum value and a current minimum value corresponding to the second image; the sub-judgment module is used for judging whether the difference value between the maximum current value and the minimum current value is not greater than a preset threshold value or not; and the determining module is used for determining that the current value characteristic corresponding to the second image accords with the preset current value characteristic if the difference value is not larger than the preset threshold value.
furthermore, the power supply line is an urban rail transit power supply line.
In the embodiment of the invention, a first image is obtained according to a current value on a power supply line acquired by a current transformer, wherein the current transformer is arranged on the power supply line, the first image is processed according to an interpolation method to obtain a second image, whether a current value characteristic corresponding to the second image meets a preset current value characteristic is determined, and if the current value characteristic corresponding to the second image does not meet the preset current value characteristic, alarm information is sent, wherein the alarm information is used for indicating the abnormity of the power supply line.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a flow chart diagram illustrating an alternative method of processing power data in accordance with an embodiment of the present invention;
Fig. 2 is a schematic structural diagram of an alternative power data processing apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
In accordance with an embodiment of the present invention, there is provided a method embodiment of a method of processing power data, it being noted that the steps illustrated in the flowchart of the figure may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than here.
Fig. 1 is a processing method of power data according to an embodiment of the present invention, where the processing method of power data provided in this embodiment may be applied to an urban rail transit power supply line, and specifically, the processing method of power data is applied to a subway power supply line as an example, where the power data may be subway load data.
As shown in fig. 1, the method comprises the steps of:
And S102, obtaining a first image according to the current value on the power supply line acquired by the current transformer, wherein the current transformer is arranged on the power supply line.
In the above step S102, when the subway runs, a first image is obtained according to a current value on the power supply line collected by a current transformer, where the current transformer is arranged on the power supply line as a load measuring device. It should be noted that the acquired subway load data is current data acquired at intervals, and there is a certain step interval.
And step S104, processing the first image according to an interpolation method to obtain a second image.
In the above step S104, a difference value processing is performed on the first image obtained from the current value on the power supply line acquired in the step S102 to obtain a second image. It should be noted that, because the current value on the power supply line acquired in step S102 is current data acquired at intervals, and the data is directly subjected to modeling, analysis and other operations, and the actual load characteristics of the subway locomotive cannot be accurately represented, the interpolation processing is performed on the first image by the method in step S104, so that the defects of information loss, image distortion and the like caused by discrete data points in the first image can be avoided, the second image with high reliability is obtained, and the original load image is better restored.
And step S106, determining whether the current value characteristic corresponding to the second image meets the preset current value characteristic.
In the step S106, whether the current value characteristic meets a preset current value characteristic is determined by analyzing the current value characteristic in the second image with high reliability, so that convenience is provided for large-scale subway load data modeling and analysis.
And S108, if the current value characteristic corresponding to the second image does not accord with the preset current value characteristic, sending alarm information, wherein the alarm information is used for indicating that the power supply circuit is abnormal.
In the above step S108, it can be known from the analysis result of the step S106 that, if the current value characteristic corresponding to the second image does not conform to the preset current value characteristic, an alarm message is sent, where the alarm message is used to indicate that the power supply line is abnormal, and then notify the relevant staff to take corresponding processing measures in time.
The method for processing power data provided by this embodiment obtains a first image according to a current value on a power supply line acquired by a current transformer, where the current transformer is disposed on the power supply line, and further processes the first image according to an interpolation method to obtain a second image, and further determines whether a current value characteristic corresponding to the second image meets a preset current value characteristic, and if the current value characteristic corresponding to the second image does not meet the preset current value characteristic, sends an alarm message, where the alarm message is used to indicate that the power supply line is abnormal, so that a problem that information loss and graphic distortion caused by a scatter diagram cannot be avoided in a related technology, and further a subway load characteristic at any time cannot be accurately determined is solved.
Optionally, in this embodiment, processing the first image according to an interpolation method to obtain the second image includes: and processing the first image according to a segmented cubic interpolation method to obtain a second image.
specifically, in order to better coincide the interpolation function with the original function in the actual interpolation problem, in this embodiment, the processing the first image according to the interpolation method to obtain the second image includes: and processing the first image according to a segmented cubic interpolation method to obtain a second image, wherein the segmented cubic interpolation method requires that the function values of an interpolation function and the original function are equal on an interpolation node, and the corresponding derivative values are also equal, so that the aim of overlapping the interpolation function and the original function is fulfilled.
Optionally, in this embodiment, processing the first image according to a piecewise cubic interpolation method to obtain the second image includes: processing the first image according to a first preset formula corresponding to the segmented cubic interpolation method to obtain a second image, wherein the first preset formula isαj(x) Is a first basis function of a first predetermined formula, betaj(x) Is the second basis function of the first predetermined formula, yjIs a first coefficient of a first predetermined formula, mjA second coefficient of the first predetermined formula, and H2n+1(x) Is alphaj(x) And betaj(x) Linear combinations of (3).
Specifically, in this embodiment, the first preset formula may be determined by the following method:
when the interpolated function f (x) is eC(1)[a,b],a＝x0<x1<...<B, then a unique target interpolation function I is determinedn(x) The following conditions are satisfied:
In(x)∈C(1)[a,b]；
In(xk)＝f(xk),In'(xk)＝f'(xk)(k＝0,1,…,n)；
In(x) Within each cell [ xk,xk+1]Above is a cubic algebraic polynomial about x;
Scale In(x) Interpolation node set x based on f (x)kPiecewise cubic Hermite interpolation of (k 0,1, …, n) if [ a, b]＝[0,1]，xkK/n, k 0, n, then In(x) Is denoted by Hn(f,x)，
Note that Hn(f, x) is a variant of the first predetermined formula.
wherein:
It should be noted that, the above-mentioned segmented cubic interpolation method combines the function value and the derivative value of the curve, so that the interpolation precision is greatly improved.
Optionally, in this embodiment, processing the first image according to a piecewise cubic interpolation method to obtain the second image further includes: processing the first image according to a second preset formula corresponding to the segmented cubic interpolation method to obtain a second image, wherein the second preset formula isx∈[a,b]，R3(x) Is an interpolation remainder of a second predetermined formula, hkIs a secondError step length of preset formula, f(4)(x) Is the fourth higher derivative of the interpolated function of the second predetermined formula, x is the interpolation point of the second predetermined formula, a is the first constant value of the second predetermined formula, and b is the second constant value of the second predetermined formula.
Specifically, in the present embodiment, the interpolation remainder R of the second preset formula is3(x) I.e. the interpolation error of the piecewise cubic interpolation method, wherein the error of the piecewise cubic Hermite interpolation is subject to the step hk＝xk+1-xkThe maximum value h of (2) is controlled, so that the purpose can be achieved by only properly selecting h when the interpolation error is controlled within a certain epsilon precision, and the Runge phenomenon can be well avoided because the h is uniformly converged on an interpolation interval.
Optionally, in this embodiment, obtaining the first image according to the current value on the power supply line collected by the current transformer includes: obtaining a scatter diagram of the current value according to the current value; processing the first image according to an interpolation method to obtain a second image comprises: and processing the scatter diagram of the current value according to an interpolation method to obtain a continuous curve chart of the current value.
Specifically, in this embodiment, obtaining the first image according to the current value on the power supply line collected by the current transformer includes: and obtaining a scatter diagram of the current value according to the current value, further processing the first image according to an interpolation method to obtain a second image, namely finding a curve passing through all load points by using the interpolation method, and analyzing a polynomial expression of the curve, wherein a function curve of the polynomial expression is a subway current load curve diagram.
Through the description of the above embodiments, the interpolation method in the power data processing method of the present invention not only ensures the interpolation accuracy, but also better restores the original load curve, and it is necessary to construct an interpolation function, and not only the node values at a given interpolation node are the same, but also the derivative values at the nodes are the same, so that the degree of adhesion between the interpolation function and the interpolated function is better. When the scatter diagram is changed into a continuous curve, the precision problem can be effectively solved, and meanwhile, the problem of the load point is converted into the problem of an interpolation function, so that the storage space is saved. The method has the advantages of simple and easy calculation, high reliability, high precision and the like, and is suitable for large-scale subway load modeling and analyzing work.
Optionally, in this embodiment, determining whether the current value characteristic corresponding to the second image meets the preset current value characteristic includes: acquiring a current maximum value and a current minimum value corresponding to the second image; judging whether the difference value of the maximum current value and the minimum current value is not greater than a preset threshold value or not; and if the difference value is not larger than the preset threshold value, determining that the current value characteristic corresponding to the second image accords with the preset current value characteristic.
Therefore, aiming at the technical problems that information loss and pattern distortion caused by a scatter diagram cannot be avoided in the related technology and further subway load characteristics at any moment cannot be accurately judged, the invention provides a power data processing method, a first image is obtained according to a current value on a power supply line acquired by a current transformer, wherein the current transformer is arranged on the power supply line, the first image is processed according to an interpolation method to obtain a second image, whether a current value characteristic corresponding to the second image meets a preset current value characteristic or not is determined, if the current value characteristic corresponding to the second image does not meet the preset current value characteristic, alarm information is sent, wherein the alarm information is used for indicating that the power supply line is abnormal, so that the discretized subway load scatter forms a continuous subway load curve, the interpolation precision can be effectively ensured, and the problems of information loss, pattern distortion and the like caused by the scatter diagram can be avoided, the subway load value at any moment can be obtained by engineering personnel under a measurement scheme with any step length.
Example 2
According to the present embodiment, there is also provided a processing apparatus for power data, the processing apparatus is mainly used for executing the processing method for power data provided in the foregoing embodiments of the present invention, and the following provides a detailed description of the processing apparatus for power data provided in the present embodiment.
Fig. 2 is a schematic structural diagram of a power data processing apparatus according to a second embodiment of the present invention, and as shown in fig. 2, the apparatus includes:
The obtaining unit 20 is configured to obtain a first image according to a current value on the power supply line collected by a current transformer, where the current transformer is disposed on the power supply line.
In this embodiment, when a subway runs, a first image is obtained according to a current value on a power supply line acquired by a current transformer, wherein the current transformer is arranged on the power supply line as a load measuring device. It should be noted that the acquired subway load data is circuit data acquired at intervals, and there is a certain step interval.
the first processing unit 22 is configured to process the first image according to an interpolation method to obtain a second image.
in this embodiment, a difference value processing is performed on a first image obtained by the current value on the power supply line acquired by the acquisition unit 20 to obtain a second image. It should be noted that, because the current value on the power supply line acquired by the acquisition unit 20 is current data acquired at intervals, the data are directly subjected to modeling, analysis and other operations, and the actual load characteristics of the subway locomotive cannot be accurately represented, the first processing unit 22 performs interpolation processing on the first image, so that the defects of information loss, image distortion and the like caused by discrete data points in the first image can be avoided, a second image with high reliability is obtained, and the original load image is better restored.
And a judging unit 24, configured to determine whether the current value characteristic corresponding to the second image meets a preset current value characteristic.
In this embodiment, whether the current value characteristics conform to the preset current value characteristics is determined by analyzing the current value characteristics in the second image with higher reliability, which provides convenience for large-scale subway load data modeling and analysis.
And the early warning unit 26 is configured to send warning information if the current value characteristic corresponding to the second image does not conform to the preset current value characteristic, where the warning information is used to indicate that the power supply line is abnormal.
In this embodiment, it can be known from the analysis result of the determination unit 24 that if the current value characteristic corresponding to the second image does not conform to the preset current value characteristic, an alarm message is sent, where the alarm message is used to indicate that the power supply line is abnormal, and then notify the relevant staff to take corresponding processing measures in time.
As can be seen from the above, in the second embodiment of the present application, the obtaining unit 20 obtains a first image according to a current value on the power supply line acquired by a current transformer, where the current transformer is disposed on the power supply line, the first processing unit 22 processes the first image according to an interpolation method to obtain a second image, the determining unit 24 determines whether a current value characteristic corresponding to the second image meets a preset current value characteristic, and the early warning unit 26 sends warning information when the current value characteristic corresponding to the second image does not meet the preset current value characteristic, where the warning information is used to indicate that the power supply line is abnormal, so that a problem that information loss and graphic distortion caused by a scatter diagram cannot be avoided in a related technology, and further a subway load characteristic at any time cannot be accurately determined is solved.
Optionally, in this embodiment, the first processing unit includes: and the acquisition module is used for processing the first image according to the segmented cubic interpolation method to obtain a second image.
Specifically, in order to better coincide the interpolation function with the original function in the actual interpolation problem, in this embodiment, the processing the first image according to the interpolation method to obtain the second image includes: and processing the first image according to a segmented cubic interpolation method to obtain a second image, wherein the segmented cubic interpolation method requires that the function values of an interpolation function and the original function are equal on an interpolation node, and the corresponding derivative values are also equal, so that the aim of overlapping the interpolation function and the original function is fulfilled.
Optionally, in this embodiment, the obtaining module includes: a first calculating module, configured to process the first image according to a first preset formula corresponding to the piecewise cubic interpolation method to obtain a second image, where the first preset formula isαj(x) Is a first basis function of a first predetermined formula, betaj(x) Is the second basis function of the first predetermined formula, yjIs a first coefficient of a first predetermined formula, mjA second coefficient of the first predetermined formula, and H2n+1(x) Is alphaj(x) And betaj(x) Linear combinations of (3).
Specifically, in this embodiment, the first preset formula may be determined by the following method:
When the interpolated function f (x) is ∈ C(1)[a,b],a＝x0<x1<...<B, then a unique target interpolation function I is determinedn(x) The following conditions are satisfied:
In(x)∈C(1)[a,b]；
In(xk)＝f(xk),In'(xk)＝f'(xk)(k＝0,1,…,n)；
In(x) Within each cell [ xk,xk+1]Above is a cubic algebraic polynomial about x;
Scale In(x) Interpolation node set x based on f (x)kPiecewise cubic Hermite interpolation of (k 0,1, …, n), if [ a, b]＝[0,1]，xkK/n, k 0, n, then In(x) Is denoted by Hn(f,x)，
Note that Hn(f, x) is a variant of the first predetermined formula.
Wherein:
It should be noted that, the above-mentioned segmented cubic interpolation method combines the function value and the derivative value of the curve, so that the interpolation precision is greatly improved.
Optionally, in this embodiment, the obtaining module includes: a second calculating module, configured to process the first image according to a second preset formula corresponding to the piecewise cubic interpolation method to obtain a second image, where the second preset formula isR3(x) Is an interpolation remainder of a second predetermined formula, hkIs the error step length of a second predetermined formula, f(4)(x) Is the fourth higher derivative of the interpolated function of the second predetermined formula, x is the interpolation point of the second predetermined formula, a is the first constant value of the second predetermined formula, and b is the second constant value of the second predetermined formula.
Specifically, in the present embodiment, the interpolation remainder R of the second preset formula is3(x) I.e. the interpolation error of the piecewise cubic interpolation method, wherein the error of the piecewise cubic Hermite interpolation is subject to the step hk＝xk+1-xkThe maximum value h of (2) is controlled, so that the purpose can be achieved by only properly selecting h when the interpolation error is controlled within a certain epsilon precision, and the Runge phenomenon can be well avoided because the h is uniformly converged on an interpolation interval.
Optionally, in this embodiment, the obtaining unit includes: a first obtaining module to: obtaining a scatter diagram of the current value according to the current value; the first processing unit includes: a second obtaining module, configured to process the first image according to an interpolation method to obtain a second image: and processing the scatter diagram of the current value according to an interpolation method to obtain a continuous curve chart of the current value.
Specifically, in this embodiment, obtaining the first image according to the current value on the power supply line collected by the current transformer includes: and obtaining a scatter diagram of the current value according to the current value, further processing the first image according to an interpolation method to obtain a second image, namely finding a curve passing through all load points by using the interpolation method, and analyzing a polynomial expression of the curve, wherein a function curve of the polynomial expression is a subway current load curve diagram.
Through the description of the above embodiments, the interpolation method in the power data processing method of the present invention not only ensures the interpolation accuracy, but also better restores the original load curve, and it is necessary to construct an interpolation function, and not only the node values at a given interpolation node are the same, but also the derivative values at the nodes are the same, so that the degree of adhesion between the interpolation function and the interpolated function is better. When the scatter diagram is changed into a continuous curve, the precision problem can be effectively solved, and meanwhile, the problem of the load point is converted into the problem of an interpolation function, so that the storage space is saved. The method has the advantages of simple and easy calculation, high reliability, high precision and the like, and is suitable for large-scale subway load modeling and analyzing work.
optionally, in this embodiment, the determining unit includes: the sub-acquisition module is used for acquiring a current maximum value and a current minimum value corresponding to the second image; the sub-judgment module is used for judging whether the difference value between the maximum current value and the minimum current value is not greater than a preset threshold value or not; and the determining module is used for determining that the current value characteristic corresponding to the second image accords with the preset current value characteristic if the difference value is not larger than the preset threshold value.
Therefore, aiming at the technical problems that information loss and pattern distortion caused by a scatter diagram cannot be avoided in the related technology and further subway load characteristics at any moment cannot be accurately judged, the invention provides an electric power data processing device, a first image is obtained according to a current value on a power supply line acquired by a current transformer, wherein the current transformer is arranged on the power supply line, the first image is processed according to an interpolation method to obtain a second image, whether a current value characteristic corresponding to the second image meets a preset current value characteristic or not is determined, and if the current value characteristic corresponding to the second image does not meet the preset current value characteristic, alarm information is sent, wherein the alarm information is used for indicating that the power supply line is abnormal, so that the discretized subway load scatter diagram forms a continuous subway load curve, interpolation precision can be effectively ensured, and the problems of information loss, pattern distortion and the like caused by the scatter diagram can be avoided, the subway load value at any moment can be obtained by engineering personnel under a measurement scheme with any step length.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. a method for processing power data, comprising:
Obtaining a first image according to a current value on a power supply line acquired by a current transformer, wherein the current transformer is arranged on the power supply line;
Processing the first image according to an interpolation method to obtain a second image;
determining whether the current value characteristic corresponding to the second image meets a preset current value characteristic or not;
If the current value characteristic corresponding to the second image does not accord with the preset current value characteristic, sending alarm information, wherein the alarm information is used for indicating that the power supply circuit is abnormal;
Wherein the processing the first image according to an interpolation method to obtain a second image comprises: processing the first image according to a segmented cubic interpolation method to obtain a second image;
the processing the first image according to a piecewise cubic interpolation method to obtain the second image comprises:
Processing the first image according to a first preset formula corresponding to the piecewise cubic interpolation method to obtain the second image, wherein the first preset formula isA is saidj(x) Is a first basis function of the first predetermined formula, the betaj(x) Is a second basis function of the first predetermined formula, yjIs a first coefficient of the first predetermined formula, mjA second coefficient being the first predetermined formula, and the H2n+1(x) Is the alphaj(x) And said betaj(x) Linear combinations of (3).
2. The method of claim 1, wherein the processing the first image according to piecewise cubic interpolation to obtain the second image further comprises:
processing the first image according to a second preset formula corresponding to the piecewise cubic interpolation method to obtain the second image, wherein the second preset formula isThe R is3(x) Is the interpolation remainder of the second predetermined formula, hkIs the error step length of the second preset formula, f(4)(x) Is the fourth higher derivative of the interpolated function of the second predetermined formula, x is the interpolation point of the second predetermined formula, a is the first constant value of the second predetermined formula, and b is the second constant value of the second predetermined formula.
3. the method of claim 1, wherein obtaining the first image according to the current value on the power supply line collected by the current transformer comprises: obtaining a scatter diagram of the current value according to the current value;
The processing the first image according to an interpolation method to obtain a second image comprises: and processing the scatter diagram of the current value according to the interpolation method to obtain a continuous curve chart of the current value.
4. the method of claim 1, wherein determining whether the current value characteristic corresponding to the second image meets a preset current value characteristic comprises:
acquiring a current maximum value and a current minimum value corresponding to the second image;
Judging whether the difference value between the maximum current value and the minimum current value is not greater than a preset threshold value or not;
And if the difference value is not larger than the preset threshold value, determining that the current value characteristic corresponding to the second image meets the preset current value characteristic.
5. The method according to any one of claims 1 to 4, wherein the power supply line is an urban rail transit power supply line.
6. an apparatus for processing power data, comprising:
The device comprises an acquisition unit, a processing unit and a display unit, wherein the acquisition unit is used for acquiring a first image according to a current value on a power supply circuit acquired by a current transformer, and the current transformer is arranged on the power supply circuit;
The first processing unit is used for processing the first image according to an interpolation method to obtain a second image;
The judging unit is used for determining whether the current value characteristic corresponding to the second image meets a preset current value characteristic or not;
The early warning unit is used for sending warning information if the current value characteristic corresponding to the second image does not accord with the preset current value characteristic, wherein the warning information is used for indicating that the power supply circuit is abnormal;
Wherein the first processing unit comprises: the acquisition module is used for processing the first image according to a segmented cubic interpolation method to obtain the second image;
The acquisition module includes: a first calculating module, configured to process the first image according to a first preset formula corresponding to the piecewise cubic interpolation methodObtaining the second image, wherein the first preset formula isa is saidj(x) Is a first basis function of the first predetermined formula, the betaj(x) Is a second basis function of the first predetermined formula, yjIs a first coefficient of the first predetermined formula, mjA second coefficient being the first predetermined formula, and the H2n+1(x) Is the alphaj(x) And said betaj(x) Linear combinations of (3).
7. The apparatus of claim 6, wherein the obtaining module further comprises: a second calculating module, configured to process the first image according to a second preset formula corresponding to the piecewise cubic interpolation method to obtain the second image, where the second preset formula isx∈[a,b]said R is3(x) Is the interpolation remainder of the second predetermined formula, hkIs the error step length of the second preset formula, f(4)(x) Is the fourth higher derivative of the interpolated function of the second predetermined formula, x is the interpolation point of the second predetermined formula, a is the first constant value of the second predetermined formula, and b is the second constant value of the second predetermined formula.
8. The apparatus of claim 6, wherein the obtaining unit comprises: the first obtaining module is used for obtaining a scatter diagram of the current value according to the current value;
The first processing unit includes: and the second obtaining module is used for processing the scatter diagram of the current value according to the interpolation method to obtain a continuous curve chart of the current value.
9. the apparatus according to claim 6, wherein the judging unit includes:
the sub-acquisition module is used for acquiring a current maximum value and a current minimum value corresponding to the second image;
The sub-judgment module is used for judging whether the difference value between the maximum current value and the minimum current value is not greater than a preset threshold value or not;
And the determining module is used for determining that the current value characteristic corresponding to the second image accords with the preset current value characteristic if the difference value is not greater than the preset threshold value.
10. The apparatus of any one of claims 6 to 9, wherein the power supply line is an urban rail transit power supply line.
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