CN118150915A - High-voltage wire surface electric field strength analysis method and system - Google Patents
High-voltage wire surface electric field strength analysis method and system Download PDFInfo
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Abstract
The invention relates to the technical field of magnetic variable measurement, in particular to a method and a system for analyzing the surface electric field intensity of a high-voltage wire, comprising the following steps: acquiring electric field intensity data acquired at all detection nodes for a plurality of times and environmental factor data, and acquiring characteristic values of the electric field intensity data in the data acquired at all detection nodes each time; acquiring the dominant degree of each environmental factor on the intensity of the acquired electric field according to different environmental factors acquired at the detection node at the same time and the same environmental factors acquired at the detection node at different times; according to the dominant degree of each environmental factor on the collected electric field intensity, the influence degree of each environmental factor on the collected electric field intensity is obtained; and selecting a detection node for collecting electric field intensity data. According to the invention, the detection node is selected by acquiring the influence degree of each environmental factor on the collected electric field intensity, so that the collected electric field intensity is more accurate, and the analysis of the electric field intensity of the high-voltage wire is facilitated.
Description
Technical Field
The invention relates to the technical field of magnetic variable measurement, in particular to a method and a system for analyzing the surface electric field intensity of a high-voltage wire.
Background
The electric field of the high-voltage wire may form a potential safety risk for personnel, animals and electronic equipment, so that the electric field of the high-voltage wire is required to analyze the electric field intensity of the surface of the high-voltage wire in order to avoid interference of the electric field of the high-voltage wire on nearby electronic equipment and protect the life safety of personnel nearby the high-voltage wire; however, since the high-voltage wire is far away from the ground, and the requirement of measuring the electric field intensity of the high-voltage wire on the measuring environment is high, and meanwhile, the environment factors which can influence the electric field intensity of the high-voltage wire are various, the accuracy of simply collecting the electric field intensity of the high-voltage wire is low.
Disclosure of Invention
The invention provides a method and a system for analyzing the surface electric field intensity of a high-voltage wire, which are used for solving the existing problems: the accuracy of simply collecting the electric field intensity of the high-voltage wire is low.
The invention discloses a method and a system for analyzing the surface electric field intensity of a high-voltage wire, which adopts the following technical scheme:
One embodiment of the invention provides a method for analyzing the electric field intensity of the surface of a high-voltage wire, which comprises the following steps:
Acquiring electric field intensity data acquired at all detection nodes for a plurality of times and environmental factor data;
Acquiring characteristic values of the electric field intensity data in the data acquired by all the detection nodes according to the change characteristics of the electric field intensity data acquired by all the detection nodes each time;
Acquiring a first dominant degree of each environmental factor on the acquired electric field intensity in data acquired at the detection node each time according to different environmental factors acquired at the detection node at the same time and the same environmental factors acquired at the detection node at different times; acquiring a second dominant degree of each environmental factor on the acquired electric field intensity according to the first dominant degree acquired each time;
According to the characteristic values of the environmental factor data and the electric field intensity data, combining the second dominant degree of each environmental factor on the collected electric field intensity to obtain the influence degree of each environmental factor on the collected electric field intensity; and selecting a detection node for collecting electric field intensity data according to the influence degree of each environmental factor on the collected electric field intensity.
Preferably, the method for obtaining the characteristic value of the electric field intensity data in the data collected by all the detection nodes according to the change characteristics of the electric field intensity data collected by all the detection nodes each time includes the following specific steps:
For the first Secondary to/>/>, Of the data collected by the individual detection nodesSeed electric field intensity data are recorded as/>Will be at the firstPersonal/>And/>Personal/>The spacing in time is denoted as (th) >Personal/>To get all/>Is denoted as/>Obtain the spacing set of (1) >Secondary to/>A set of intervals of all kinds of electric field intensity data in the data collected by the detection nodes;
According to the first Secondary to/>Interval set of all electric field intensity data in data acquired by each detection node, and/>All kinds of electric field intensity data in the acquired data are in the/>Frequency of occurrence, th/>, in sub-acquired dataAmplitude values of all electric field intensity data in the acquired data are obtained to obtain the/>Characteristic values of electric field intensity data in the data acquired in times.
Preferably, the acquiring a firstThe characteristic value of the electric field intensity data in the data acquired for a time comprises the following specific methods:
In the method, in the process of the invention, Represents the/>Secondary to/>Characteristic value of electric field intensity data in data acquired by each detection node,/>Represents the/>Secondary to/>The average value of the amplitude values of all electric field intensity data in the data acquired by the detection nodes; /(I)Represents the/>Secondary to/>The variety and the number of the electric field intensity data in the data acquired by the detection nodes; /(I)Representation/>A mean value of all elements in the interval set; /(I)Representation/>Standard deviation of all elements in the interval set of (2); /(I)Represents the/>Secondary to/>The/>, in the data collected by each detection nodeSeed electric field intensity data, at/>Secondary to/>The frequency of occurrence in the data collected by the individual detection nodes; /(I)A logarithmic function based on a natural constant is represented.
Preferably, the method for obtaining the first dominant degree of each environmental factor on the collected electric field intensity in the data collected at the detection node each time according to different environmental factors collected at the detection node at the same time and the same environmental factors collected at the detection node at different times includes the following specific steps:
For the first Secondary to/>/>, Of the data collected by the individual detection nodesSeed environmental factor, obtain the/>Secondary to/>/>, Of the data collected by the individual detection nodesThe sequence of species environmental factors is denoted as/>; Acquire every time at the/>Each environmental factor sequence in the data collected by each detection node; according to every time at the/>/>, Of the data collected by the individual detection nodesSpecies environmental factor sequence/>Difference between them, obtain the/>Secondary to/>/>, Of the data collected by the individual detection nodesA first dominance of environmental factors to the strength of the acquired electric field.
Preferably, the acquiring a firstSecondary to/>/>, Of the data collected by the individual detection nodesThe specific calculation formula of the first dominant degree of the environmental factors on the collected electric field intensity is as follows:
In the method, in the process of the invention, Represents the/>Secondary to/>/>, Of the data collected by the individual detection nodesA first dominance of the seed environmental factor to the collected electric field strength; /(I)Representation except for the firstHistorical reference data amounts outside of the times; /(I)Representation/>The average value of all elements in the list; /(I)Representation/>The average value of all elements in the list; /(I)Representation/>Standard deviations of all elements in (3); /(I)Representation/>Standard deviations of all elements in (3); /(I)Representation/>And/>Pearson correlation coefficient therebetween; /(I)A category number representing an environmental factor; /(I)Representing an absolute value operation.
Preferably, the obtaining the second dominant degree of each environmental factor to the collected electric field intensity according to the first dominant degree obtained by each collection includes the following specific methods:
Will be the first Second/>, in data collected by all detection nodesThe average value of the first dominant degree of the seed environmental factors on the collected electric field intensity is recorded as the/>Second/>, in the acquired dataThe dominant degree of the environmental factors on the collected electric field intensity; the/>, of the data to be collected each timeThe average value of the dominant degree of the seed environmental factors on the collected electric field intensity is recorded as the first/>A second dominance of environmental factors to the strength of the acquired electric field.
Preferably, the acquiring the influence degree of each environmental factor on the collected electric field intensity according to the characteristic values of the environmental factor data and the electric field intensity data and in combination with the second dominant degree of each environmental factor on the collected electric field intensity comprises the following specific steps:
Will be the first Secondary to/>/>, Of the data collected by the individual detection nodesThe product of the mean value and the standard deviation of the seed environmental factors is recorded as the/>Secondary to/>/>, Of the data collected by the individual detection nodesCharacteristic values of the environmental factors; acquiring characteristic values of all environmental factors in data acquired by all detection nodes each time;
For the first Detection node and/>The environment factors are taken as the ordinate and the characteristic values of the electric field intensity data are taken as the abscissa, a characteristic value rectangular coordinate system is constructed, and the method is that every timeCharacteristic value and/>, of electric field intensity data of each detection nodeObtaining the characteristic value of the environmental factor as each data point in the rectangular coordinate system of the characteristic valueElectric field strength of individual detection nodes-th/>A seed environmental characteristic value scatter plot;
Acquisition of the first Electric field strength of individual detection nodes-th/>Principal component axis in the seed environmental feature value scatter plot is/>And (4)/>Electric field strength of individual detection nodes-th/>The one-dimensional sequence of seed environmental characteristic values is recorded as/>; Acquiring/>, with the horizontal rightward direction being 0 DEG and the vertical upward direction being 90 DEGThe angle of (2) is denoted as/>; According to/>Correction of dominant degree of collected electric field intensity by environmental factors/>Obtain the/>Electric field strength of individual detection nodes-th/>The angle of the principal component axis after correction of the seed environmental characteristic value scatter diagram is recorded as/>；
Acquisition ofCenter of (E)/>The center of (2) is at an angle/>As the straight line of/>Electric field strength of individual detection nodes-th/>The principal component axis after the correction of the seed environment characteristic value scatter diagram is recorded as/>And will/>Electric field strength of individual detection nodes-th/>All data points in the seed environment characteristic value scatter diagram are projected to/>Obtained after correction/>Electric field strength of individual detection nodes-th/>The one-dimensional sequence of seed environmental characteristic values is recorded as/>; Acquisition/>All element variances in (1) are noted as/>；
The electric field intensity of each detection node after correction is-firstThe mean value of all element variances in the one-dimensional sequence of seed environmental characteristic values is recorded as/>Said/>For/>The degree of influence of environmental factors on the strength of the collected electric field.
Preferably, the acquiring a firstElectric field strength of individual detection nodes-th/>The method for correcting the angle of the main component axis of the environment characteristic value scatter diagram comprises the following specific steps:
Will be the first Inverse proportion normalization result and/>, of dominant degree of seed environmental factors on collected electric field intensityAs the product of (1) >Electric field strength of individual detection nodes-th/>And correcting the angle of the principal component axis of the environment characteristic value scatter diagram.
Preferably, the method for selecting the detection node for collecting the electric field intensity data according to the influence degree of each environmental factor on the collected electric field intensity includes the following specific steps:
Acquisition is based on the first The specific calculation formula of the discomfort degree of the environmental factors on the electric field intensity of the collected high-voltage wire is as follows:
In the method, in the process of the invention, Represents the/>The discomfort degree parameter of the electric field intensity of the high-voltage wire is acquired by the environmental factors; /(I)Represents the/>The degree of discomfort of the environmental factors on the electric field intensity of the collected high-voltage wires; /(I)Represents the/>The degree of influence of environmental factors on the strength of the collected electric field; /(I)Represents the/>, when the electric field intensity of the high-voltage wire is collectedMaximum value of seed environmental factor; represents the/>, when the electric field intensity of the high-voltage wire is collected A minimum value of the seed environmental factor; /(I)Representing the/>, at the current timeEnvironmental factor data; /(I)Representing a linear normalization function;
Acquiring the discomfort degree of each environmental factor on the electric field intensity of the acquired high-voltage wire; presetting a discomfort degree threshold ; The degree of discomfort to the collection of the electric field strength of the high voltage wire when any one of the environmental factors collected at the detection node is greater than/>And when the detection node is replaced immediately, the electric field intensity of the high-voltage wire is collected.
Another embodiment of the present invention provides a system for analyzing the electric field intensity of a surface of a high-voltage wire, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any one of the above-mentioned methods for analyzing the electric field intensity of a surface of a high-voltage wire when executing the computer program.
The technical scheme of the invention has the beneficial effects that: the characteristic values of the electric field intensity data in the data collected by all the detection nodes are obtained; according to different environmental factors collected at the detection node at the same time and the same environmental factors collected at the detection node at different times, acquiring the dominant degree of each environmental factor on the collected electric field intensity, and acquiring the dominant degree of each environmental factor on the collected electric field intensity through the difference between the different environmental factors collected at the detection node at the same time and the correlation between the same environmental factors collected at the detection node at different times, so as to prepare data for the subsequent acquisition of the influence degree of each environmental factor on the collected electric field intensity; according to the dominant degree of each environmental factor on the collected electric field intensity, the influence degree of each environmental factor on the collected electric field intensity is obtained, the detection node for collecting the electric field intensity data is selected, and the detection node for collecting the electric field intensity data is more accurately evaluated by the influence degree of the collected electric field intensity, so that the collected electric field intensity data is more accurate, and the collected electric field intensity data of the high-voltage wire is more accurate.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flow chart of the steps of a method for analyzing the electric field intensity on the surface of a high-voltage wire according to the present invention.
Fig. 2 is a flow chart of selecting a detection node that collects electric field strength data.
Detailed Description
In order to further describe the technical means and effects adopted by the present invention to achieve the preset purpose, the following detailed description refers to specific embodiments, structures, features and effects of a method and a system for analyzing the electric field intensity of a high-voltage wire surface according to the present invention, which are described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" means that the embodiments are not necessarily the same. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
The invention provides a method and a system for analyzing the electric field intensity of the surface of a high-voltage wire, which are specifically described below with reference to the accompanying drawings.
Referring to fig. 1, a flowchart illustrating a method for analyzing the electric field intensity of a surface of a high-voltage wire according to an embodiment of the invention is shown, the method includes the following steps:
Step S001: electric field intensity data acquired at all detection nodes and environmental factor data are acquired several times.
It should be noted that, the electric field of the high-voltage wire may form a potential safety risk for personnel, animals and equipment, in order to avoid the electric field of the high-voltage wire from interfering with nearby electronic devices and protecting the life safety of personnel nearby the high-voltage wire, the electric field intensity of the surface of the high-voltage wire needs to be analyzed, in order to analyze the influence of the electric field of the high-voltage wire on nearby electronic devices and personnel, the electric field intensity of the high-voltage wire needs to be collected near the ground directly under the high-voltage wire, but because the high-voltage wire is far away from the ground and the electric field intensity is extremely easy to be interfered by external environment, a proper position needs to be selected to collect the electric field intensity of the high-voltage wire, so that the collected electric field intensity of the high-voltage wire is more accurate, thereby helping to analyze the electric field intensity of the high-voltage wire. Therefore, the electric field intensity of the high-voltage wire under different environmental factors needs to be acquired, and the influence degree of each environmental factor on the acquired electric field intensity is acquired.
Specifically, randomly selected from high-voltage wiresThe system comprises a plurality of detection nodes, wherein an electric field sensor and an environment monitoring sensor are arranged right below each detection node, and the environment monitoring sensor comprises but is not limited to a temperature sensor, a humidity sensor and a wind speed sensor; continuously collecting each detection node/>Acquiring electric field intensity data and environmental factor data at each time in seconds to obtain acquisition data of each node, wherein the environmental factor data is acquired by an environmental monitoring sensor, and the environmental factor data is acquired by a sensor, a sensor and a sensorFor the preset number of detection nodes,/>For a preset acquisition period,/>And/>The specific value of (2) can be set by combining with the actual situation, the embodiment does not have hard requirement, in the embodiment, the specific value is expressed as/>、/>Description is made; will be nearest to the current moment/>Collecting data of all secondary nodes as historical reference data,/>For the preset historical reference data quantity,/>The specific value of (2) can be set by combining with the actual situation, the embodiment does not have hard requirement, in the embodiment, the specific value is expressed as/>Description will be made.
Thus, historical reference data is obtained.
Step S002: and acquiring characteristic values of the electric field intensity data in the data acquired by all the detection nodes according to the change characteristics of the electric field intensity data acquired by all the detection nodes each time.
It should be noted that, because the requirement of measuring the electric field intensity of the high-voltage wire on the measuring environment is very high, and the environmental factors capable of affecting the collection of the electric field intensity of the high-voltage wire are various, and each environmental factor can jointly affect the collection of the electric field intensity of the high-voltage wire to different degrees, if the detection node is selected at will, the accuracy of the collected electric field intensity of the high-voltage wire is low, therefore, the embodiment is used as a method for analyzing the electric field intensity of the surface of the high-voltage wire, specifically, by calculating the extent of the influence of each environmental factor on the collection of the electric field intensity of the high-voltage wire, the electric field intensity of the high-voltage wire is collected by selecting a proper position, and the accuracy of the collected electric field intensity of the high-voltage wire is improved, thereby helping to analyze the electric field intensity of the high-voltage wire.
Specifically, for the firstSecondary to/>Data collected by each detection node will be the/>Secondary to/>The same electric field intensity data in the data collected by the detection nodes are recorded as the same electric field intensity data, and a plurality of electric field intensity data are obtained;
For the first Secondary to/>/>, Of the data collected by the individual detection nodesSeed electric field intensity data are recorded as/>Will be at the firstPersonal/>And/>Personal/>The spacing in time is denoted as (th) >Personal/>To get all/>Is denoted as/>Obtain the spacing set of (1) >Secondary to/>A set of intervals of all kinds of electric field intensity data in the data collected by the detection nodes;
According to the first Secondary to/>Interval set of all electric field intensity data in data acquired by each detection node, and/>All kinds of electric field intensity data in the acquired data are in the/>Frequency of occurrence, th/>, in sub-acquired dataAmplitude values of all electric field intensity data in the acquired data are obtained to obtain the/>The characteristic value of the electric field intensity data in the data acquired for the second time is as follows:
In the method, in the process of the invention, Represents the/>Secondary to/>Characteristic value of electric field intensity data in data acquired by each detection node,/>Represents the/>Secondary to/>The average value of the amplitude values of all electric field intensity data in the data acquired by the detection nodes; /(I)Represents the/>Secondary to/>The variety and the number of the electric field intensity data in the data acquired by the detection nodes; /(I)Representation/>A mean value of all elements in the interval set; /(I)Representation/>Standard deviation of all elements in the interval set of (2); /(I)Represents the/>Secondary to/>The/>, in the data collected by each detection nodeSeed electric field intensity data, at/>Secondary to/>The frequency of occurrence in the data collected by the individual detection nodes; /(I)A logarithmic function based on a natural constant is represented.
It should be noted that the number of the substrates,Expressed as (I /)Secondary to/>Information entropy of electric field intensity data in data acquired by the detection nodes; and/>The smaller the value of (2) indicates thatSecondary to/>The more chaotic the electric field intensity data in the data collected by each detection node are in different types, and/>And/>Respectively represent the/>Secondary to/>The electric field intensity data in the data collected by the detection nodes are disordered in the same kind, soExpressed as (I /)Secondary to/>The degree of confusion of the whole electric field intensity data in the data collected by the detection nodes; and/>Represents the/>Secondary to/>The average value of the amplitude values of all electric field intensity data in the data acquired by each detection node is multiplied by the/>The overall chaotic degree of the electric field intensity data in the acquired data is obtainedCharacteristic values of electric field intensity data in the sub-collected data, and/>Secondary to/>Characteristic values of electric field intensity data in data acquired by the detection nodes can represent the/>Secondary to/>And the whole electric field intensity data in the data collected by the detection nodes. After obtaining the/>Secondary to/>After characteristic values of electric field intensity data in data acquired by each detection node, the detection node is arranged at the first/>, respectivelyCharacteristic values of electric field intensity data in data collected by the detection nodes.
So far, the characteristic value of the electric field intensity data in the data collected by all the detection nodes is obtained.
Step S003: acquiring a first dominant degree of each environmental factor on the acquired electric field intensity in data acquired at the detection node each time according to different environmental factors acquired at the detection node at the same time and the same environmental factors acquired at the detection node at different times; and acquiring a second dominant degree of each environmental factor on the acquired electric field intensity according to the first dominant degree acquired each time.
It should be noted that, in this embodiment, the degree of influence of each environmental factor on the electric field strength of the collected high-voltage wire is calculated, the electric field strength of the collected high-voltage wire is collected at a proper position, so as to improve the accuracy of the electric field strength of the collected high-voltage wire, and thus help to analyze the electric field strength of the high-voltage wire.
Specifically, for the firstSecondary to/>/>, Of the data collected by the individual detection nodesSeed environmental factor, obtain the/>Secondary to/>/>, Of the data collected by the individual detection nodesThe sequence of species environmental factors is denoted as/>; Acquire every time at the/>Each environmental factor sequence in the data collected by each detection node; according to every time at the/>/>, Of the data collected by the individual detection nodesSpecies environmental factor sequence/>Difference between them, obtain the/>Secondary to/>/>, Of the data collected by the individual detection nodesThe first dominance degree of the environmental factors to the collected electric field intensity is specifically calculated by the following formula:
In the method, in the process of the invention, Represents the/>Secondary to/>/>, Of the data collected by the individual detection nodesA first dominance of the seed environmental factor to the collected electric field strength; /(I)Representation except for the firstHistorical reference data amounts outside of the times; /(I)Representation/>The average value of all elements in the list; /(I)Representation/>The average value of all elements in the list; /(I)Representation/>Standard deviations of all elements in (3); /(I)Representation/>Standard deviations of all elements in (3); /(I)Representation/>And/>Pearson correlation coefficient therebetween; /(I)A category number representing an environmental factor; /(I)Representing an absolute value operation.
Further, the first step isSecond/>, in data collected by all detection nodesThe average value of the first dominant degree of the seed environmental factors on the collected electric field intensity is recorded as the/>Second/>, in the acquired dataThe dominant degree of the environmental factors on the collected electric field intensity; the/>, of the data to be collected each timeThe average value of the dominant degree of the seed environmental factors on the collected electric field intensity is recorded as the first/>A second dominance of environmental factors to the strength of the acquired electric field.
It should be noted that the number of the substrates,Expressed as/>And/>The correlation coefficient between the two,The smaller the value of (2) is, the description/>And/>The weaker the correlation between them, and/>And/>The weaker the correlation between them, the more the correlation is expressed by the/>Environmental factors dominate the influence on the strength of the collected electric field; /(I)Representation ofAnd/>Overall difference,/>Representation/>And/>The difference in the degree of dispersion is that,Representation/>And/>Differences between/>And/>The larger the difference between them, the more the description is made by the/>Environmental factors dominate the impact on the strength of the acquired electric field.
So far, the dominant degree of each environmental factor on the collected electric field intensity is obtained.
Step S004: according to the characteristic values of the environmental factor data and the electric field intensity data, combining the second dominant degree of each environmental factor on the collected electric field intensity to obtain the influence degree of each environmental factor on the collected electric field intensity; and selecting a detection node for collecting electric field intensity data according to the influence degree of each environmental factor on the collected electric field intensity.
It should be noted that, because of various environmental factors that can affect the electric field intensity of the collected high-voltage wire, when the relationship between the environmental factors and the electric field intensity is analyzed by using the idea of the PCA algorithm, a certain degree of characteristic loss is caused, and the data influence of different dimensional information on the electric field intensity during the current detection is different, so that some non-important condition factors are misjudged finally, and the accuracy of the electric field intensity detection is reduced; after the dominant degree of each environmental factor on the collected electric field intensity is obtained in step S003, the characteristic of the environmental factor with large dominant degree on the collected electric field intensity can be maintained as much as possible according to each environmental factor, so as to obtain the influence degree of each environmental factor on the collected electric field intensity.
Specifically, will beSecondary to/>/>, Of the data collected by the individual detection nodesThe product of the mean value and the standard deviation of the seed environmental factors is recorded as the/>Secondary to/>/>, Of the data collected by the individual detection nodesCharacteristic values of the environmental factors; acquiring characteristic values of all environmental factors in data acquired by all detection nodes each time;
For the first Detection node and/>The environment factors are taken as the ordinate and the characteristic values of the electric field intensity data are taken as the abscissa, a characteristic value rectangular coordinate system is constructed, and the method is that every timeCharacteristic value and/>, of electric field intensity data of each detection nodeObtaining the characteristic value of the environmental factor as each data point in the rectangular coordinate system of the characteristic valueElectric field strength of individual detection nodes-th/>A seed environmental characteristic value scatter plot;
pair of first using PCA algorithm Electric field strength of individual detection nodes-th/>Performing dimension reduction on the seed environment characteristic value scatter diagram to obtain the/>Electric field strength of individual detection nodes-th/>Principal component axis in the seed environmental feature value scatter plot is/>And (4)/>Electric field strength of individual detection nodes-th/>The one-dimensional sequence of seed environmental characteristic values is recorded as/>Since the PCA algorithm is a well-known prior art, the description is omitted in this embodiment, and the vertical upward direction is 90 ° with the horizontal rightward direction being 0 °, to obtain/>The angle of (2) is denoted as/>; According to/>Correction of dominant degree of collected electric field intensity by environmental factors/>Obtain the/>Electric field strength of individual detection nodes-th/>The angle of the main component axis after the correction of the environment characteristic value scatter diagram has the specific calculation formula as follows:
In the method, in the process of the invention, Represents the/>Electric field strength of individual detection nodes-th/>The angle of the main component axis after the correction of the seed environmental characteristic value scatter diagram; /(I)Represents the/>The dominant degree of the environmental factors on the collected electric field intensity; /(I)Representation/>Is a function of the angle of (2); Representing an exponential function based on natural constants, the present embodiment employs/> Model to present inverse proportion and normalized relationship,/>For model input, the implementer can set inverse proportion and normalization function according to actual situation.
It should be noted that, whenThe greater the dominance of the seed environmental factors to the collected electric field strength, the description will be given of the/>, of the collected electric field strengthThe more important the species environment factor, the more need to preserve the/>The characteristic of the environmental factor, that is, the more the principal component axis should be brought close to the coordinate axis composed of the characteristic values of the environmental factor, the/>Electric field strength of individual detection nodes-th/>Obtaining the/>, after correcting the angle of the main component axis by using the environment characteristic value scatter diagramElectric field strength of individual detection nodes-th/>And a corrected principal component axis in the environment characteristic value scatter diagram.
In particular, obtainCenter of (E)/>The center of (2) is at an angle/>As the straight line of/>Electric field strength of individual detection nodes-th/>The principal component axis after the correction of the seed environment characteristic value scatter diagram is recorded as/>And will/>Electric field strength of individual detection nodes-th/>All data points in the seed environment characteristic value scatter diagram are projected to/>Obtained after correction/>Electric field strength of individual detection nodes-th/>The one-dimensional sequence of seed environmental characteristic values is recorded as/>。
Further, the PCA algorithm is utilized to obtainAll element variances in (1) are noted as/>；
Acquiring the electric field intensity of each detection node after correction-firstThe mean value of all element variances in the one-dimensional sequence of seed environmental characteristic values is recorded as/>Said/>For/>The degree of influence of environmental factors on the strength of the collected electric field.
It should be noted that the number of the substrates,With a large value of (1) >, thenThe collected electric field strength will also change with the change of the environmental factors, namely the first/>The influence degree of the environmental factors on the collected electric field intensity is large, so that whether the electric field intensity of the high-voltage wire is collected at the detection node can be judged by analyzing each environmental factor at the detection node and the influence degree of each environmental factor on the collected electric field intensity when the electric field intensity of the high-voltage wire is collected.
Specifically, for the firstEnvironmental factors are collected by using an environmental monitoring sensor, and the/>, at the current moment, of the environment is collectedThe seed environmental factor data is recorded as/>The/>, when acquiring the electric field intensity of a high-voltage wire, based on the method for measuring the power frequency electric field and the magnetic field of a high-voltage alternating-current overhead power transmission line, a transformer substationThe maximum and minimum of the seed environmental factors are respectively denoted as/>And/>According to/>、/>、/>And/>Acquisition is based on the/>The specific calculation formula of the discomfort degree of the environmental factors on the electric field intensity of the collected high-voltage wire is as follows:
In the method, in the process of the invention, Represents the/>The discomfort degree parameter of the electric field intensity of the high-voltage wire is acquired by the environmental factors; /(I)Represents the/>The degree of discomfort of the environmental factors on the electric field intensity of the collected high-voltage wires; /(I)Represents the/>The degree of influence of environmental factors on the strength of the collected electric field; /(I)Represents the/>, when the electric field intensity of the high-voltage wire is collectedMaximum value of seed environmental factor; represents the/>, when the electric field intensity of the high-voltage wire is collected A minimum value of the seed environmental factor; /(I)Representing the/>, at the current timeEnvironmental factor data; /(I)And the linear normalization function is represented, and the normalization object is the discomfort degree parameter of all environmental factors on the electric field intensity of the high-voltage wire.
Acquiring the discomfort degree of each environmental factor on the electric field intensity of the acquired high-voltage wire; presetting a discomfort degree threshold；/>The specific value of (2) can be set by combining with the actual situation, the embodiment does not have hard requirement, in the embodiment, the method usesDescription is made; the degree of discomfort to the collection of the electric field strength of the high voltage wire when any one of the environmental factors collected at the detection node is greater than/>When the detection node is replaced immediately, the electric field intensity of the high-voltage wire is collected; the degree of discomfort to the collection of the electric field strength of the high voltage wire when any one of the environmental factors collected at the detection node is less than or equal to/>And the electric field intensity of the high-voltage wire collected at the moment is high in accuracy.
When the following is performedBelow 0, we say the/>The environmental factors do not meet the standard required for collecting the electric field intensity of the high-voltage wire, namely the discomfort degree of collecting the electric field intensity of the high-voltage wire is set as 1, and the detection node should be replaced immediately; when/>When 0 or more, the description of the first/>The environmental factors do not meet the standard required by the electric field intensity of the high-voltage wire, but due to the fact that the environmental factors influencing the electric field intensity of the high-voltage wire are numerous, namely the discomfort degree parameters of all other environmental factors on the electric field intensity of the high-voltage wire are needed to be combined, so that the discomfort degree of the environmental factors on the electric field intensity of the high-voltage wire is measured more accurately.
Fig. 2 is a flow chart of selecting a detection node for collecting electric field intensity data according to the present embodiment.
Another embodiment of the present invention provides a high-voltage wire surface electric field intensity analysis system, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements a high-voltage wire surface electric field intensity analysis method in steps S001 to S004 when executing the computer program.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the invention, but any modifications, equivalent substitutions, improvements, etc. within the principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. The method for analyzing the electric field intensity of the surface of the high-voltage wire is characterized by comprising the following steps of:
Acquiring electric field intensity data acquired at all detection nodes for a plurality of times and environmental factor data;
Acquiring characteristic values of the electric field intensity data in the data acquired by all the detection nodes according to the change characteristics of the electric field intensity data acquired by all the detection nodes each time;
Acquiring a first dominant degree of each environmental factor on the acquired electric field intensity in data acquired at the detection node each time according to different environmental factors acquired at the detection node at the same time and the same environmental factors acquired at the detection node at different times; acquiring a second dominant degree of each environmental factor on the acquired electric field intensity according to the first dominant degree acquired each time;
According to the characteristic values of the environmental factor data and the electric field intensity data, combining the second dominant degree of each environmental factor on the collected electric field intensity to obtain the influence degree of each environmental factor on the collected electric field intensity; and selecting a detection node for collecting electric field intensity data according to the influence degree of each environmental factor on the collected electric field intensity.
2. The method for analyzing the electric field intensity of the surface of the high-voltage wire according to claim 1, wherein the method for obtaining the characteristic value of the electric field intensity data in the data collected by all the detection nodes according to the change characteristics of the electric field intensity data collected by all the detection nodes each time comprises the following specific steps:
For the first Secondary to/>/>, Of the data collected by the individual detection nodesSeed electric field intensity data are recorded as/>Will/>Personal (S)And/>Personal/>The spacing in time is denoted as (th) >Personal/>To get all/>Is denoted as/>Obtain the spacing set of (1) >Secondary to/>A set of intervals of all kinds of electric field intensity data in the data collected by the detection nodes;
According to the first Secondary to/>Interval set of all electric field intensity data in data acquired by each detection node, and/>All kinds of electric field intensity data in the acquired data are in the/>Frequency of occurrence, th/>, in sub-acquired dataAmplitude values of all electric field intensity data in the acquired data are obtained to obtain the/>Characteristic values of electric field intensity data in the data acquired in times.
3. The method for analyzing the electric field intensity of the surface of the high-voltage wire according to claim 2, wherein the first step is obtainedThe characteristic value of the electric field intensity data in the data acquired for a time comprises the following specific methods:
In the method, in the process of the invention, Represents the/>Secondary to/>Characteristic value of electric field intensity data in data acquired by each detection node,/>Represents the/>Secondary to/>The average value of the amplitude values of all electric field intensity data in the data acquired by the detection nodes; /(I)Represents the/>Secondary to/>The variety and the number of the electric field intensity data in the data acquired by the detection nodes; /(I)Representation/>A mean value of all elements in the interval set; /(I)Representation/>Standard deviation of all elements in the interval set of (2); /(I)Represents the/>Secondary to/>The/>, in the data collected by each detection nodeSeed electric field intensity data, at/>Secondary to/>The frequency of occurrence in the data collected by the individual detection nodes; a logarithmic function based on a natural constant is represented.
4. The method for analyzing the electric field intensity of the surface of the high voltage wire according to claim 1, wherein the step of obtaining the first dominance degree of each environmental factor on the collected electric field intensity in the data collected at the detection node each time according to the different environmental factors collected at the detection node at the same time and the same environmental factor collected at the detection node at the same time comprises the following specific steps:
For the first Secondary to/>/>, Of the data collected by the individual detection nodesSeed environmental factor, obtain the/>Secondary to/>/>, Of the data collected by the individual detection nodesThe sequence of species environmental factors is denoted as/>; Acquire every time at the/>Each environmental factor sequence in the data collected by each detection node; according to every time at the/>/>, Of the data collected by the individual detection nodesSpecies environmental factor sequence/>Difference between them, obtain the/>Secondary to/>/>, Of the data collected by the individual detection nodesA first dominance of environmental factors to the strength of the acquired electric field.
5. The method of claim 4, wherein the step of obtaining the first electric field intensity is performed bySecondary to/>/>, Of the data collected by the individual detection nodesThe specific calculation formula of the first dominant degree of the environmental factors on the collected electric field intensity is as follows:
In the method, in the process of the invention, Represents the/>Secondary to/>/>, Of the data collected by the individual detection nodesA first dominance of the seed environmental factor to the collected electric field strength; /(I)Representation except for the firstHistorical reference data amounts outside of the times; /(I)Representation/>The average value of all elements in the list; /(I)Representation/>The average value of all elements in the list; /(I)Representation/>Standard deviations of all elements in (3); /(I)Representation ofStandard deviations of all elements in (3); /(I)Representation/>And/>Pearson correlation coefficient therebetween; /(I)A category number representing an environmental factor; /(I)Representing an absolute value operation.
6. The method for analyzing the electric field intensity of the surface of the high-voltage wire according to claim 1, wherein the step of obtaining the second dominance of each environmental factor to the collected electric field intensity according to the first dominance obtained by each collection comprises the following specific steps:
Will be the first Second/>, in data collected by all detection nodesThe average value of the first dominant degree of the seed environmental factors on the collected electric field intensity is recorded as the/>Second/>, in the acquired dataThe dominant degree of the environmental factors on the collected electric field intensity; the/>, of the data to be collected each timeThe average value of the dominant degree of the seed environmental factors on the collected electric field intensity is recorded as the first/>A second dominance of environmental factors to the strength of the acquired electric field.
7. The method for analyzing the electric field intensity of the surface of the high-voltage wire according to claim 1, wherein the method for obtaining the influence degree of each environmental factor on the collected electric field intensity according to the environmental factor data and the characteristic value of the electric field intensity data and combining the second dominant degree of each environmental factor on the collected electric field intensity comprises the following specific steps:
Will be the first Secondary to/>/>, Of the data collected by the individual detection nodesThe product of the mean value and the standard deviation of the seed environmental factors is recorded as the/>Secondary to/>/>, Of the data collected by the individual detection nodesCharacteristic values of the environmental factors; acquiring characteristic values of all environmental factors in data acquired by all detection nodes each time;
For the first Detection node and/>The environment factors are taken as the ordinate and the characteristic values of the electric field intensity data are taken as the abscissa, a characteristic value rectangular coordinate system is constructed, and the method is that every timeCharacteristic value and/>, of electric field intensity data of each detection nodeObtaining the/>, taking the characteristic value of the environmental factor as each data point in the rectangular coordinate system of the characteristic valueElectric field strength of individual detection nodes-th/>A seed environmental characteristic value scatter plot;
Acquisition of the first Electric field strength of individual detection nodes-th/>Principal component axis in the seed environmental feature value scatter plot is/>And (b)Electric field strength of individual detection nodes-th/>The one-dimensional sequence of seed environmental characteristic values is recorded as/>; Acquiring/>, with the horizontal rightward direction being 0 DEG and the vertical upward direction being 90 DEGThe angle of (2) is denoted as/>; According to/>Correction of dominant degree of collected electric field intensity by environmental factors/>Obtain the/>Electric field strength of individual detection nodes-th/>The angle of the principal component axis after correction of the seed environmental characteristic value scatter diagram is recorded as/>；
Acquisition ofCenter of (E)/>The center of (2) is at an angle/>As the straight line of/>Electric field strength of individual detection nodes-th/>The principal component axis after the correction of the seed environment characteristic value scatter diagram is recorded as/>And will/>Electric field intensity of each detection node-firstAll data points in the seed environment characteristic value scatter diagram are projected to/>Obtained after correction/>Electric field strength of individual detection nodes-th/>The one-dimensional sequence of seed environmental characteristic values is recorded as/>; Acquisition/>All element variances in (1) are noted as/>；
The electric field intensity of each detection node after correction is-firstThe mean value of all element variances in the one-dimensional sequence of seed environmental characteristic values is recorded as/>Said/>For/>The degree of influence of environmental factors on the strength of the collected electric field.
8. The method for analyzing the electric field intensity of a surface of a high voltage wire as claimed in claim 7, wherein said obtaining a first stepElectric field strength of individual detection nodes-th/>The method for correcting the angle of the main component axis of the environment characteristic value scatter diagram comprises the following specific steps:
Will be the first Inverse proportion normalization result and/>, of dominant degree of seed environmental factors on collected electric field intensityIs the product of (1)Electric field strength of individual detection nodes-th/>And correcting the angle of the principal component axis of the environment characteristic value scatter diagram.
9. The method for analyzing the electric field intensity of the surface of the high-voltage wire according to claim 1, wherein the selecting the detection node for collecting the electric field intensity data according to the influence degree of each environmental factor on the collected electric field intensity comprises the following specific steps:
Acquisition is based on the first The specific calculation formula of the discomfort degree of the environmental factors on the electric field intensity of the collected high-voltage wire is as follows:
In the method, in the process of the invention, Represents the/>The discomfort degree parameter of the electric field intensity of the high-voltage wire is acquired by the environmental factors; /(I)Represents the/>The degree of discomfort of the environmental factors on the electric field intensity of the collected high-voltage wires; /(I)Represents the/>The degree of influence of environmental factors on the strength of the collected electric field; /(I)Represents the/>, when the electric field intensity of the high-voltage wire is collectedMaximum value of seed environmental factor; /(I)Represents the/>, when the electric field intensity of the high-voltage wire is collectedA minimum value of the seed environmental factor; /(I)Representing the/>, at the current timeEnvironmental factor data; /(I)Representing a linear normalization function;
Acquiring the discomfort degree of each environmental factor on the electric field intensity of the acquired high-voltage wire; presetting a discomfort degree threshold ; The degree of discomfort to the collection of the electric field strength of the high voltage wire when any one of the environmental factors collected at the detection node is greater than/>And when the detection node is replaced immediately, the electric field intensity of the high-voltage wire is collected.
10. A high voltage wire surface electric field strength analysis system comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the computer program when executed by the processor implements the steps of a high voltage wire surface electric field strength analysis method according to any of claims 1-9.
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