CN117688279A - Metering device and metering method for complex electromagnetic environment - Google Patents
Metering device and metering method for complex electromagnetic environment Download PDFInfo
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Abstract
A metering device and a metering method aiming at a complex electromagnetic environment perform extraction according to the values of electric energy metering indexes of each power grid line in a metering period, a numerical treatment method of the electric energy metering indexes is constructed, interference numerical extraction is performed on the values of the electric energy metering indexes, the effect of magnetic field interference numerical values on the numerical information stability of the electric energy metering indexes is prevented, and the metering accuracy is improved. The Fourier transform method and the numerical value of the effective magnetic field interference index are used for executing separation treatment on the electric energy metering index of each power grid line, the numerical analysis high efficiency is improved, the Hilbert transform is synchronously used for executing interference removal and taking on each frequency component group of the electric energy metering index of the power grid line, the adaptive interference removal treatment on each frequency component group is achieved, and the negative effect of the magnetic field interference part in each frequency component group on the numerical stability of the electric energy metering index of the power grid line is prevented.
Description
Technical Field
The invention belongs to the technical field of metering, and particularly relates to a metering device and method for a complex electromagnetic environment.
Background
With the continuous emergence of distributed energy sources, 5G communication base stations, electric automobile charging stations and novel power distribution networks, electromagnetic environments become more and more complex, the complex electromagnetic environments have certain influence on the electric energy metering devices which are commonly used at present and are called an electric energy monitoring device in the patent application number of CN201820858908.X, specifically, the electric energy metering devices use MCU controllers which are connected with voltage transmitters, current transmitters and electric energy transmitters and wireless communication modules, the MCU controllers are connected with metering terminals in the wireless network through the wireless communication modules in a communication mode, and then the MCU controllers transmit electric energy metering values of power grid lines transmitted by the voltage transmitters, the current transmitters and the electric energy transmitters to the metering terminals through the wireless communication modules to display and backup treatment, so that the purpose of electric energy metering of the power grid lines is achieved.
The metering of the electric energy metering device relates to trade settlement among power grid companies, operators and users, and the metering accuracy directly relates to economic benefits of multiple parties. While now facing the increasing complexity of electromagnetic interference in the power grid, the metering of the power grid line to the metering terminals, if still in the manner described above, may be inaccurate and may compromise the economic benefits of certain users.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a metering device and a metering method aiming at a complex electromagnetic environment, which are used for executing extraction according to the values of the electric energy metering indexes of each power grid line in the metering period, constructing a value disposal method of the electric energy metering indexes, executing interference value extraction on the values of the electric energy metering indexes, preventing the effect of magnetic field interference values on the stability of the value information of the electric energy metering indexes and improving the metering accuracy. According to the method, the Fourier transform method and the numerical value of the effective magnetic field interference index are used for carrying out separation treatment on the electric energy metering index of each power grid line, the numerical analysis high efficiency is improved, the synchronous Hilbert transform is used for carrying out interference removal and taking on each frequency component group of the electric energy metering index of the power grid line, enhancement is carried out on a norm interference removal equation of a linear operator, the effect of carrying out adaptive interference removal treatment on each frequency component group is achieved, the negative effect of a magnetic field interference part in each frequency component group on the numerical stability of the electric energy metering index of the power grid line is prevented, enhancement is carried out on a norm interference removal model of each frequency component group by using a norm soft and strong critical quantity equation of a linear operator, and the defect that the soft and strong critical quantity equation is inaccurate in reconstruction signal and low in smoothness during Hilbert inverse transformation is overcome; in synchronization, the method and the device use the corresponding correlation among the enhancement values, perform operation on the authenticity of the interference value of the enhancement value of the electric energy metering index of each power grid line, extract and filter the magnetic field interference value, and further overcome the negative effects of the magnetic field interference value on the value cleanliness and stability of the electric energy metering index. The electric energy metering index numerical control system has the effects of being good in numerical control accuracy of the electric energy metering index and improving the numerical control accuracy of the electric energy metering index.
The invention adopts the following technical scheme.
A metering method for a complex electromagnetic environment, comprising:
s1: collecting the numerical value of the electric energy metering index of each power grid line, and constructing an electric energy metering index equation of each power grid line;
s2: analyzing the value of the electric energy metering index of each power grid line, detecting the value of the interference of the extracted magnetic field, and executing treatment to achieve the treatment of the value of the electric energy metering index.
Preferably, the electric energy metering index equation is a regression line equation obtained by applying a least square method to the values of the electric energy metering index of each power grid line, the value of the regression line equation corresponding to the X axis in the Cartesian system represents a value collection time point u, and the value of the Y axis in the Cartesian system is the value corresponding to the electric energy metering index of each power grid line at each number of value collection time points.
Preferably, the method of detecting the extracted magnetic field disturbance value and performing the treatment comprises:
setting an electric energy metering index equation corresponding to an electric energy metering index n of a power grid line as g (u, n), and performing treatment on the electric energy metering index equation according to the value of an effective magnetic field interference index to obtain an electric energy metering index message set of the power grid line, wherein the equation is as follows:
in the equation, F is the frequency of appearance of the value of the effective magnetic field interference index, H j (u) is the value of the effective magnetic field interference index of the j-th appearance collected at the corresponding u time point, eta is the adjusting code for controlling the state that the value of the effective magnetic field interference index is higher or lower than zero, phi 0 Is a defined quantity of the values of the effective magnetic field interference index,T n is the variance of the overall value of the electrical energy metering index n of the network line, +.>The system is an electric energy metering index message group of the electric energy metering index n of the electric network line, and the numerical value of the effective magnetic field interference index is the numerical value of the magnetic field interference index of the electric network line, which can damage the numerical value of the electric energy metering index of the electric network line.
Preferably, after obtaining the electric energy metering index information group of the power grid line, the method further comprises:
electric energy metering index message group of electric network line aiming at electric energy metering index n of electric network lineSeparating to obtain electric energy metering index information group of power grid line>And then obtaining each frequency component group of the electric energy metering index of the electric network line according to each frequency component of the electric energy metering index message of each electric network line in the electric energy metering index message group of the electric network line.
Preferably, the equation for each frequency component group that takes the power metering index of the grid line is:
in the equation, JNG l (u, n) is the first frequency component group of the electric energy metering index n of the power grid line, and is the first frequency component of the electric energy metering index message of the corresponding power grid line when the j-th display adjusting code of the electric energy metering index n of the power grid line is the numerical value of the effective magnetic field interference index of eta.
Preferably, after each frequency component group of the electric energy metering index of the power grid line is obtained, the method further comprises:
obtaining each remaining part group of the electric energy metering index of the power grid line according to each frequency component group of the electric energy metering index of the power grid line and an electric energy metering index equation, wherein the equation is as follows:
within the equation, s l (u, n) is the first remaining group of the power metering index n of the power network line, s l-1 (u, n) is the first-1 remaining part group of the electric energy metering index n of the power grid line, JNG l (u, n) is the first frequency component group of the electric energy metering index n of the power grid line, L is the number of the remaining partial groups, g (u, n) is the electric energy metering index equation of the electric energy metering index n of the power grid line, and u is the value collection time point.
Preferably, after each remaining portion group of the power metering index of the power grid line is obtained, the method further comprises:
Performing Hilbert transformation on each frequency component group to obtain norms of linear operators corresponding to each frequency component group; and obtaining a norm equation of the interference-removing linear operator of each frequency component group according to the norm of the linear operator of each frequency component group, the norm soft critical quantity of the linear operator and the strong critical quantity equation.
Preferably, the norm equation of the interference-free linear operator of the frequency component group is:
in equation, c n,l,k Is the norm of the kth linear operator of the kth frequency component group of the electrical energy metering index n of the power grid line, c' n,l,k Is the norm c of the linear operator n,l,k Norms of corresponding interference-removing linear operators, U l Is the norm critical quantity of the linear operator of the first frequency component group, and the norm average of the linear operator of the first frequency component group is calculatedThe multiple is taken as the norm critical quantity of the linear operator, FH () is the symbol equation, c n,l,k Above zero, the value is one, c n,l,k Below zero, its value is negative one, c n,l,k Zero is zero, which is zero; v is the change importance, v is the change coefficient;
after receiving the norm equation of the interference-removing linear operator of each frequency component group, performing interference-removing treatment on the norms of the linear operators in each frequency component group, filtering the norms of the interference-value linear operators, and obtaining the reconstruction group of each frequency component through Hilbert inverse transformation.
Preferably, after obtaining the reconstruction of each frequency component, the method further comprises:
and obtaining an electric energy metering index interference elimination equation of the power grid line corresponding to the electric energy metering index of each power grid line according to the reconstruction group of each frequency component and each residual partial group, and performing interference elimination treatment on the numerical value of the electric energy metering index of each power grid line.
Preferably, the electric energy metering index interference-free equation is:
in the equation, g '(u, n) is the electric energy metering index enhancement value of each electric network line corresponding to each value collection time point u obtained by dividing the electric energy metering index of the electric network line by the interference equation by the electric energy metering index of the electric network line n, and L is the number of frequency component groups, namely the number of remaining partial groups, JNG' l (u, n) is the reconstruction of the frequency components of the first frequency component group of the power metering index n of the power grid line, s l (u, n) is the first remaining group of the electrical energy metering index n of the power grid line.
Preferably, after obtaining the interference elimination equation of the electric energy metering index of the electric network line corresponding to the electric energy metering index of each electric network line, the method further comprises:
according to an interference equation of the electric energy metering index of the electric network line of the electric energy metering index of each electric network line, calculating an electric energy metering index enhancement value of each electric network line corresponding to each value collection time point u, obtaining an enhancement value of the electric energy metering index of each electric network line, and constructing an electric energy metering index enhancement value array of the electric network line, wherein the electric energy metering index enhancement value array of the electric network line is:
In the equation, L is an electric energy metering index enhancement numerical array of the power grid line, N is the total amount of electric energy metering indexes of the power grid line, o is the total amount of numerical collection time points, o=500, g ' (1, 1), g ' (1, 2), g ' (1, o) are enhancement numerical values corresponding to electric energy metering indexes of the power grid line at numerical collection time points 1,2, o respectively, g ' (2, 1), g ' (2, 2), g ' (2, o) are enhancement numerical values corresponding to electric energy metering indexes of the power grid line at numerical collection time points 1,2, o respectively, and g ' (N, 1), g ' (N, 2), g ' (N, o) are enhancement numerical values corresponding to metering evaluation parameters N at numerical collection time points 1,2, o respectively.
Preferably, after constructing the electric energy metering index enhancement numerical array of the power grid line, the method further comprises:
to ensure the numerical metering efficacy of the electric energy metering indexes, the actual degree of the interference value of the electric energy metering index enhancement value of each electric network line is obtained according to the distinguishing state between the electric energy metering index enhancement value of each electric network line and the electric energy metering index enhancement value of the adjacent electric network line, and the equation is as follows:
within the equation, A g’(N,o) Is to enhance the realism of the interference value of the value,is obtained by solving->Smaller values within, BZ () is the z-score normalization method and e is the euler number;
Receiving the authenticity of the interference value of each enhancement value, setting the authenticity critical quantity of the interference value, taking the enhancement value with the authenticity higher than the authenticity critical quantity of the interference value as the magnetic field interference value, removing the magnetic field interference value in the electric energy metering index of each power grid line, and obtaining the final value corresponding to the electric energy metering index of each power grid line;
the final value of the electric energy metering index of each power grid line is obtained, the treatment and analysis of the value of the electric energy metering index are achieved, and then the final value is displayed and backed up, so that the purpose of electric energy metering is achieved.
A metering device for a complex electromagnetic environment, comprising:
the construction module is used for receiving the numerical value of the electric energy metering index of each power grid line and constructing an electric energy metering index equation of each power grid line;
the treatment module is used for analyzing the value of the electric energy metering index of each power grid line, detecting the value of the extracted magnetic field interference and executing treatment to achieve the treatment of the value of the electric energy metering index.
Compared with the prior art, the method has the advantages that extraction is performed according to the numerical value of the electric energy metering index of each power grid line in the metering period, a numerical value treatment method of the electric energy metering index is constructed, interference numerical value extraction is performed on the numerical value of the electric energy metering index, the effect of magnetic field interference numerical value on the numerical value information stability of the electric energy metering index is prevented, and the metering accuracy is improved. According to the method, the Fourier transform method and the numerical value of the effective magnetic field interference index are used for carrying out separation treatment on the electric energy metering index of each power grid line, the numerical analysis high efficiency is improved, the synchronous Hilbert transform is used for carrying out interference removal and taking on each frequency component group of the electric energy metering index of the power grid line, enhancement is carried out on a norm interference removal equation of a linear operator, the effect of carrying out adaptive interference removal treatment on each frequency component group is achieved, the negative effect of a magnetic field interference part in each frequency component group on the numerical stability of the electric energy metering index of the power grid line is prevented, enhancement is carried out on a norm interference removal model of each frequency component group by using a norm soft and strong critical quantity equation of a linear operator, and the defect that the soft and strong critical quantity equation is inaccurate in reconstruction signal and low in smoothness during Hilbert inverse transformation is overcome; in synchronization, the method and the device use the corresponding correlation among the enhancement values, perform operation on the authenticity of the interference value of the enhancement value of the electric energy metering index of each power grid line, extract and filter the magnetic field interference value, and further overcome the negative effects of the magnetic field interference value on the value cleanliness and stability of the electric energy metering index. The electric energy metering index numerical control system has the effects of being good in numerical control accuracy of the electric energy metering index and improving the numerical control accuracy of the electric energy metering index.
Drawings
FIG. 1 is a partial flow chart of a metering method for a complex electromagnetic environment according to the present invention;
fig. 2 is a partial block diagram of a metering device for a complex electromagnetic environment according to the present invention.
Detailed Description
The metering of the electric energy metering device relates to trade settlement among power grid companies, operators and users, and the metering accuracy directly relates to economic benefits of multiple parties. While now facing the increasingly complex electromagnetic interference in the power network, the metering, if still in the manner described above, can result in inaccurate values of the power delivered to the metering terminals' power grid lines and can compromise the economic benefits of certain users. To achieve effective detection of complex electromagnetic environments, further improvements in metering algorithms and protective measures for electrical energy metering devices are an important issue.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely expressed with reference to the drawings in the embodiments of the present invention. The embodiments expressed in this application are merely examples of some, but not all, of the inventions. Based on the spirit of the present invention, one of ordinary skill in the art would obtain additional embodiments without inventive faculty, all falling within the scope of the invention.
As shown in fig. 1, a metering method for a complex electromagnetic environment according to the present invention is operated on a metering terminal, and includes:
s1: collecting the numerical value of the electric energy metering index of each power grid line, and constructing an electric energy metering index equation of each power grid line;
in a preferred but non-limiting embodiment of the present invention, the key of the present application is to perform treatment analysis on the values of the electric energy measurement indexes of each electric network line of the electric network lines, so as to improve the numerical accuracy of the electric energy measurement indexes, thereby giving stable numerical dependence to the numerical access of the electric energy measurement indexes; at first, the method and the device can collect the numerical values of the electric energy metering indexes of each power grid line in the working period of the power grid line through the voltage transmitter, the current transmitter and the electric energy transmitter, collect the numerical values of the electric energy metering indexes of each power grid line in the working period of the power grid line according to the time-point sequence, and are suitable for analyzing the numerical content of the electric energy metering indexes in the working period of the power grid line. The voltage transmitter, the current transmitter and the electric energy transmitter collect values periodically, so that a measurer can select a value collection period u of electric energy measurement indexes of the power grid lines, that is, each distance period u carries out one-time value collection on the electric energy measurement indexes of each power grid line, the application is set to u=1s, analysis of the values of the electric energy measurement indexes of the power grid lines is required, each electric energy measurement index equation is obtained according to the values of the electric energy measurement indexes of each power grid line, the electric energy measurement index equation is a regression line equation obtained by applying a least square method to the values of the electric energy measurement indexes of each power grid line, the value of an X axis in a Cartesian system corresponding to the regression line equation represents a value collection time point u, and the value of a Y axis in the Cartesian system is the value corresponding to the electric energy measurement indexes of each power grid line at each number of value collection time points.
Thus, the numerical value of the electric energy metering index of each power grid line can be collected according to the method, and each electric energy metering index equation is obtained and used for executing treatment analysis on the numerical value of the electric energy metering index during the working period of the power grid line. The voltage transmitter, the current transmitter, the power transmitter and the magnetic field meter are all identical in time point of collecting the values, that is, synchronous.
S2: analyzing the value of the electric energy metering index of each power grid line, detecting the value of the interference of the extracted magnetic field, and executing treatment to achieve the treatment of the value of the electric energy metering index.
Aiming at the obtained electric energy metering index equation of each electric network line, the method and the device for analyzing the electric energy metering index of each electric network line aim at achieving the treatment of the numerical value of the electric energy metering index.
In a preferred but non-limiting embodiment of the present invention, during the collection of the electric energy measurement index of the power grid line, the electric energy measurement index of the power grid line is interfered by the partial magnetic field interference which cannot be prevented by the power grid line site, and the synchronous transmitter also forms partial micro magnetic field interference during the operation of the circuit, so that the electric energy measurement index of the power grid line has a huge magnetic field interference value in the value, and the numerical accuracy and the measurement value of the electric energy measurement index of the power grid line are acted; therefore, to improve the value cleanliness and ensure the accuracy of measurement, the present application performs analysis on the value of the electric energy measurement index, detects the value of the extracted magnetic field interference and performs treatment, including:
In the method, the separation treatment is performed on the electric energy metering index equation by using the Fourier transformation, however, the Fourier transformation has the defect of modal heteromerization, the heteromerization state can occur in the separation period, namely, the same frequency component can have different frequencies, the numerical separation efficiency of the electric energy metering index of the electric network line is reduced, and the interference numerical treatment function of the numerical value of the electric energy metering index of the electric network line is negatively affected, so that the method performs the collaborative separation treatment on the numerical values of the magnetic field interference indexes of the electric network line, which are respectively added on the electric energy metering index equation of each electric network line, by using the electric energy metering index n of the electric network line, and performs the specific detection treatment on the numerical values of the electric energy metering index: setting an electric energy metering index equation corresponding to an electric energy metering index n of a power grid line as g (u, n), and performing treatment on the electric energy metering index equation according to the value of an effective magnetic field interference index to obtain an electric energy metering index message group of the power grid line, wherein the equation is as follows:
In the equation, F is the frequency of appearance of the value of the effective magnetic field interference index, H j (u) is the value of the effective magnetic field interference index of the j-th appearance collected at the corresponding u time point, eta is the adjusting code for controlling the state that the value of the effective magnetic field interference index is higher or lower than zero, phi 0 Is a defined amount of the effective magnetic field interference index, the metering person can be determined according to specific requirements, and the application is set asT n Is the variance of the overall value of the electrical energy metering index n of the grid line,the value of the effective magnetic field interference index is the value of the effective magnetic field interference index, and the value of the effective magnetic field interference index can be the value of the magnetic field interference index which can destroy the value of the electric energy metering index of the electric network lineA degree value;
and (3) circularly acquiring the electric energy metering index message group of the power grid line corresponding to the electric energy metering index of each power grid line.
In a preferred but non-limiting embodiment of the present invention, after obtaining the electric energy metering index information set of the power grid line, the method further includes:
electric energy metering index message group of electric network line aiming at electric energy metering index n of electric network lineSeparating to obtain electric energy metering index information group of power grid line>And then obtaining each frequency component group of the electric energy metering index of the electric network line according to each frequency component of the electric energy metering index message of each electric network line in the electric energy metering index message group of the electric network line.
In a preferred but non-limiting embodiment of the invention, the equation for each frequency component group that takes the power metering index of the grid line is:
in the equation, JNG l (u, n) is the first frequency component group of the electric energy metering index n of the power grid line, and is the first frequency component of the electric energy metering index message of the corresponding power grid line when the j-th display adjusting code of the electric energy metering index n of the power grid line is the numerical value of the effective magnetic field interference index of eta;
In the above manner, each frequency component group of the electric energy metering index n of each power grid line is obtained.
In a preferred but non-limiting embodiment of the present invention, after obtaining each frequency component group of the power metering index of the power grid line, the method further comprises:
obtaining each remaining part group of the electric energy metering index of the power grid line according to each frequency component group of the electric energy metering index of the power grid line and an electric energy metering index equation, wherein the equation is as follows:
within the equation, s l (u, n) is the first remaining group of the power metering index n of the power network line, s l-1 (u, n) is the first-1 remaining part group of the electric energy metering index n of the power grid line, JNG l (u, n) is the first frequency component group of the electric energy metering index n of the power grid line, L is the number of the remaining partial groups, g (u, n) is the electric energy metering index equation of the electric energy metering index n of the power grid line, and u is the value collection time point.
In a preferred but non-limiting embodiment of the present invention, after each remaining portion group of the power metering index of the power grid line is obtained, the method further comprises:
the method comprises the steps of performing interference elimination treatment on each frequency component group by using an interference filtering method to eliminate interference value parts in each frequency component group, and initially, performing Hilbert transformation on each frequency component group to obtain norms of linear operators corresponding to each frequency component group; and then, performing critical quantity setting on norms of the linear operators, wherein the critical quantity setting is suitable for filtering norms of the linear operators corresponding to the interference values, the critical quantity setting of the linear operators is generally carried out in a strong critical quantity and weak critical quantity setting mode, however, the strong critical quantity is too absolute and has jump values, so that the treated values form a problem of unsmooth, and the weak critical quantity also has partial errors before and after the treatment of the norms of the linear operators, which is unfavorable for reconstruction of each frequency component group during Hilbert inverse transformation, so that the norms of the linear operators corresponding to the interference value parts are not large, and the norms of the linear operators divided by the interference linear operators of each frequency component group are obtained according to the norms of the linear operators, the soft critical quantity and the strong critical quantity equation of the linear operators.
In a preferred but non-limiting embodiment of the invention, the norm equation of the interference-free linear operator of the frequency component groups is:
in equation, c n,l,k Is the norm of the kth linear operator of the kth frequency component group of the electrical energy metering index n of the power grid line, c' n,l,k Is the norm c of the linear operator n,l,k Norms of corresponding interference-removing linear operators, U l Is the norm critical quantity of the linear operator of the first frequency component group, and the quantifier can determine the norm mean of the linear operator of the first frequency component group according to specific requirementsThe multiple is taken as the norm critical quantity of the linear operator, FH () is the symbol equation, c n,l,k Above zero, the value is one, c n,l,k Below zero, its value is negative one, c n,l,k Zero is zero, which is zero; v is the change importance, v is the change coefficient, and the metering person can set according to specific requirements, and v=2 in the application; according to the norm equation of the interference-removing linear operator, when v=0, the lower the v=0, the higher the v is, the closer the v is to one, and then the closer the norm equation of the interference-removing linear operator is to the higher the strong critical quantity equation, the adaptive interference-removing treatment can be performed on the norms of the linear operators of each frequency component group in the above manner, the norms of the interference-value linear operators of each frequency component group can be filtered efficiently, and the smooth efficacy of the reconstruction value of each frequency component application in the Hilbert inverse transformation process is ensured;
And after receiving the norm equation of the interference-removing linear operator of each frequency component group, performing interference-removing treatment on the norms of the linear operators in each frequency component group, filtering the norms of the interference-value linear operators, and obtaining the reconstruction of each frequency component through Hilbert inverse transformation.
In a preferred but non-limiting embodiment of the present invention, after obtaining the reconstruction of each frequency component, the method further comprises:
and obtaining an electric energy metering index interference elimination equation of the power grid line corresponding to the electric energy metering index of each power grid line according to the reconstruction group of each frequency component and each residual partial group, and performing interference elimination treatment on the numerical value of the electric energy metering index of each power grid line.
In a preferred but non-limiting embodiment of the invention, the power metering index interference-free equation is:
in the equation, g '(u, n) is the electric energy metering index enhancement value of each electric network line corresponding to each value collection time point u obtained by dividing the electric energy metering index of the electric network line by the interference equation by the electric energy metering index of the electric network line n, and L is the number of frequency component groups, namely the number of remaining partial groups, JNG' l (u, n) is the reconstruction of the frequency components of the first frequency component group of the power metering index n of the power grid line, s l (u, n) is the first remaining set of electrical energy metering indicators n of the grid line;
and (3) circulating the above mode, and obtaining an interference elimination equation of the electric energy metering index of the power grid line of the electric energy metering index of each power grid line.
In a preferred but non-limiting embodiment of the present invention, after obtaining the interference-free equation of the electric energy measurement index of the electric power grid line corresponding to the electric energy measurement index of each electric power grid line, the method further includes:
according to an interference equation of the electric energy metering index of the electric network line of the electric energy metering index of each electric network line, calculating an electric energy metering index enhancement value of each electric network line corresponding to each value collection time point u, obtaining an enhancement value of the electric energy metering index of each electric network line, and constructing an electric energy metering index enhancement value array of the electric network line, wherein the electric energy metering index enhancement value array of the electric network line is:
in the equation, L is an electric energy metering index enhancement numerical array of the power grid line, N is the number of electric energy metering indexes of the power grid line, o is the total amount of numerical collection time points, and a metering person can set according to specific requirements.
In a preferred but non-limiting embodiment of the present invention, after constructing the electric energy metering index enhancement value array of the power grid line, the method further comprises:
to ensure the numerical metering efficacy of the electric energy metering indexes and improve the numerical accuracy of the electric energy metering indexes, the application executes corresponding analysis on the numerical value of each electric energy metering index after the initial interference elimination enhancement, and the interference numerical value has singleness and small correlation degree with adjacent numerical values around the array, so the application executes detection on the authenticity of the interference numerical value of the electric energy metering index enhancement numerical value of each electric network line, and obtains the authenticity of the interference numerical value of the electric energy metering index enhancement numerical value of each electric network line according to the distinguishing state between the electric energy metering index enhancement numerical value of each electric network line and the electric energy metering index enhancement numerical value of the array adjacent electric network line, and the equation is as follows:
within the equation, A g’(N,o) Interference number, which is an enhanced valueThe degree of realism of the value,is obtained by solving->Smaller values within, BZ () is the z-score normalization method and e is the euler number; the higher the reality of the interference value, the larger the singularity of the corresponding enhancement value, and the larger the difference between the enhancement values at the same periphery, the more the interference value will be.
The method comprises the steps of circularly collecting the authenticity of an interference value of each enhanced value, setting the authenticity critical quantity of the interference value, taking the enhanced value with the authenticity higher than the authenticity critical quantity of the interference value as a magnetic field interference value, removing the magnetic field interference value in the electric energy metering index of each power grid line, and obtaining the final value corresponding to the electric energy metering index of each power grid line; the magnetic field disturbance reality critical quantity measurer can be set according to specific requirements, and the magnetic field disturbance reality critical quantity measurer is set to be one half of the actual measurement standard.
And the method is circulated, the final value of the electric energy metering index of each power grid line is obtained, the treatment analysis of the value of the electric energy metering index is achieved, and then the final value is displayed and backed up, so that the purpose of electric energy metering is achieved.
Therefore, the processing analysis can be performed on the values of the electric energy metering indexes of each power grid line according to the mode, the final value of the electric energy metering indexes of each power grid line is collected, the numerical processing of the electric energy metering indexes for metering is achieved, the numerical cleanliness of the electric energy metering indexes is improved, stable information is given to metering, and the metering accuracy is improved.
In a word, the method for processing the electric energy metering index is characterized in that extraction is performed according to the numerical value of the electric energy metering index of each electric network line in the metering period, a numerical value treatment method of the electric energy metering index is constructed, interference numerical value extraction is performed on the numerical value of the electric energy metering index, the effect of magnetic field interference numerical value on the numerical value information stability of the electric energy metering index is prevented, and the metering accuracy is improved. According to the method, the Fourier transform method and the numerical value of the effective magnetic field interference index are used for carrying out separation treatment on the electric energy metering index of each power grid line, the numerical analysis high efficiency is improved, the synchronous Hilbert transform is used for carrying out interference removal and taking on each frequency component group of the electric energy metering index of the power grid line, enhancement is carried out on a norm interference removal equation of a linear operator, the effect of carrying out adaptive interference removal treatment on each frequency component group is achieved, the negative effect of a magnetic field interference part in each frequency component group on the numerical stability of the electric energy metering index of the power grid line is prevented, enhancement is carried out on a norm interference removal model of each frequency component group by using a norm soft and strong critical quantity equation of a linear operator, and the defect that the soft and strong critical quantity equation is inaccurate in reconstruction signal and low in smoothness during Hilbert inverse transformation is overcome;
In synchronization, the method and the device use the corresponding correlation among the enhancement values, perform operation on the authenticity of the interference value of the enhancement value of the electric energy metering index of each power grid line, extract and filter the magnetic field interference value, and further overcome the negative effects of the magnetic field interference value on the value cleanliness and stability of the electric energy metering index. The electric energy metering index numerical control system has the effects of being good in numerical control accuracy of the electric energy metering index and improving the numerical control accuracy of the electric energy metering index.
As shown in fig. 2, a metering device for a complex electromagnetic environment according to the present invention includes:
the MCU controller is connected with the magnetic field meter, the voltage transmitter, the current transmitter and the electric energy transmitter and is used for collecting the values of magnetic field interference indexes of the power grid lines on site and transmitting the values into the controller, the voltage transmitter, the current transmitter and the electric energy transmitter are used for collecting the values of voltage indexes, the values of current indexes and the values of electric energy indexes of the power grid lines respectively and transmitting the values into the controller, and the values of the voltage indexes, the values of the current indexes or the values of the electric energy indexes of each power grid line are the values of electric energy metering indexes of each power grid line; the voltage transmitter, the current transmitter, the power transmitter and the magnetic field meter are all identical in time point of collecting the values, that is, synchronous.
The MCU controller is in communication connection with a metering terminal in the wireless network through the wireless communication module, and is used for transmitting the numerical value of the electric energy metering index of the power grid line and the numerical value of the magnetic field interference index of the power grid line site to the metering terminal through the wireless communication module;
the construction module is used for receiving the numerical value of the electric energy metering index of each power grid line and constructing an electric energy metering index equation of each power grid line;
the treatment module is used for analyzing the value of the electric energy metering index of each power grid line, detecting the value of the extracted magnetic field interference and executing treatment to achieve the treatment of the value of the electric energy metering index. The metering terminal can be a computer, the wireless communication module can be a 4G module, and the wireless network can be a 4G network.
Compared with the prior art, the method has the advantages that extraction is performed according to the numerical value of the electric energy metering index of each power grid line in the metering period, a numerical value treatment method of the electric energy metering index is constructed, interference numerical value extraction is performed on the numerical value of the electric energy metering index, the effect of magnetic field interference numerical value on the numerical value information stability of the electric energy metering index is prevented, and the metering accuracy is improved. According to the method, the Fourier transform method and the numerical value of the effective magnetic field interference index are used for carrying out separation treatment on the electric energy metering index of each power grid line, the numerical analysis high efficiency is improved, the synchronous Hilbert transform is used for carrying out interference removal and taking on each frequency component group of the electric energy metering index of the power grid line, enhancement is carried out on a norm interference removal equation of a linear operator, the effect of carrying out adaptive interference removal treatment on each frequency component group is achieved, the negative effect of a magnetic field interference part in each frequency component group on the numerical stability of the electric energy metering index of the power grid line is prevented, enhancement is carried out on a norm interference removal model of each frequency component group by using a norm soft and strong critical quantity equation of a linear operator, and the defect that the soft and strong critical quantity equation is inaccurate in reconstruction signal and low in smoothness during Hilbert inverse transformation is overcome; in synchronization, the method and the device use the corresponding correlation among the enhancement values, perform operation on the authenticity of the interference value of the enhancement value of the electric energy metering index of each power grid line, extract and filter the magnetic field interference value, and further overcome the negative effects of the magnetic field interference value on the value cleanliness and stability of the electric energy metering index. The electric energy metering index numerical control system has the effects of being good in numerical control accuracy of the electric energy metering index and improving the numerical control accuracy of the electric energy metering index.
The present disclosure can be a system, method, and/or computer program product. The computer program product can include a computer-readable storage medium having computer-readable program instructions embodied thereon for causing a processor to perform each aspect of the present disclosure.
The computer readable auxiliary medium can be a tangible power grid line capable of holding and auxiliary instructions for execution of the power grid line operations by the instructions. The computer readable accessory medium can be, but is not limited to, an electric accessory grid line, a magnetic accessory grid line, an optical accessory grid line, an electromagnetic accessory grid line, a semiconductor accessory grid line, or any suitable combination of the foregoing. Still further examples (non-enumerated list) of the computer-readable storage medium include: portable computer disk, hard disk, random Access Memory (RAM), read-only memory (RyM), erasable programmable read-only memory (EPRyM or flash memory), static Random Access Memory (SRAM), portable compact disk read-only memory (HD-RyM), digital versatile disk (DXD), memory stick, floppy disk, mechanical coded power grid lines, punch cards or bump structures in grooves like instructions attached thereto, optionally properly merging with the above. Computer-readable storage media as used herein are not to be construed as transient messages themselves, such as radio waves or otherwise freely propagating electromagnetic waves, electromagnetic waves propagating through a waveguide or otherwise transfer medium (just like optical pulses through a transmission line cable), or electrical messages transferred through wires.
The computer readable program instructions expressed herein can be downloaded from a computer readable storage medium to each of the extrapolated/processed power grid lines, or downloaded to an external computer or external storage power grid line via a wireless network, like the internet, a local area network, a wide area network, and/or a wireless network. Wireless networks can include copper transfer cables, transmission line transfer, wireless transfer, routers, firewalls, switches, WIFI device computers, and/or edge servers. The wireless network adapter card or wireless network port in each of the extrapolated/processed power grid lines receives computer-readable program instructions from the wireless network and forwards the computer-readable program instructions for storage in the computer-readable accompanying medium in each of the extrapolated/processed power grid lines.
The computer program instructions for performing the operations of the present disclosure can be assembler instructions, instruction set architecture (lSA) instructions, machine mapping instructions, microcode, firmware instructions, condition definition values, or source code or object code written in a random convergence of one or more programming languages, including an object oriented programming language such as Sdallqala, H++ or the like, as opposed to conventional procedural programming languages such as the "H" language or similar programming languages. The computer readable program instructions can be executed entirely on the client computer, partly on the client computer, as a single software package, partly on the client computer and partly on a remote computer or entirely on the remote computer or server. In a modality involving a remote computer, the remote computer can be connected to the client computer through an arbitrary other wireless network including a local area network (LAb) or a wide area network (UAb), or can be connected to an external computer (as if an internet service provider were employed to connect through the internet). In some embodiments, each aspect of the disclosure is achieved by personalizing the electronic circuitry, like programmable logic circuitry, field programmable gate arrays (disposal platforms), or Programmable Logic Arrays (PLAs), with status values of computer readable program instructions, which are capable of executing the computer readable program instructions.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, and any modifications and equivalents are intended to be encompassed by the scope of the claims.
Claims (10)
1. A metering method for a complex electromagnetic environment, comprising:
s1: collecting the numerical value of the electric energy metering index of each power grid line, and constructing an electric energy metering index equation of each power grid line;
s2: analyzing the value of the electric energy metering index of each power grid line, detecting the value of the interference of the extracted magnetic field, and executing treatment to achieve the treatment of the value of the electric energy metering index.
2. The metering method for complex electromagnetic environment according to claim 1, wherein the electric energy metering index equation is a regression line equation obtained by applying a least square method to the values of the electric energy metering index of each power grid line, the value of the regression line equation corresponding to the X axis in the cartesian system represents a value collection time point u, and the value of the Y axis in the cartesian system is the value corresponding to the electric energy metering index of each power grid line at each number of value collection time points.
3. The method of claim 1, wherein the method of detecting the extracted magnetic field disturbance value and performing the treatment comprises:
setting an electric energy metering index equation corresponding to an electric energy metering index n of a power grid line as g (u, n), and performing treatment on the electric energy metering index equation according to the value of an effective magnetic field interference index to obtain an electric energy metering index message set of the power grid line, wherein the equation is as follows:
in the equation, F is the frequency of appearance of the value of the effective magnetic field interference index, H j (u) is the value of the effective magnetic field interference index of the j-th appearance collected at the corresponding u time point, eta is the adjusting code for controlling the state that the value of the effective magnetic field interference index is higher or lower than zero, phi 0 Is a defined quantity of the values of the effective magnetic field interference index,T n is the variance of the overall value of the electrical energy metering index n of the network line, +.>The system is an electric energy metering index message group of the electric energy metering index n of the electric network line, and the numerical value of the effective magnetic field interference index is the numerical value of the magnetic field interference index of the electric network line, which can damage the numerical value of the electric energy metering index of the electric network line.
4. A metering method for a complex electromagnetic environment as claimed in claim 3, wherein after obtaining the set of electrical energy metering index messages of the power grid line, further comprises:
electric energy metering index message group of electric network line aiming at electric energy metering index n of electric network line, and electric energy metering index message group of electric network line aiming at electric energy metering index n of electric network line through Fourier transformationSeparating to obtain electric energy metering index information group of power grid line>Each frequency component of the electric energy metering index message of each electric network line in the power network line is obtained, and then each frequency component group of the electric energy metering index of the electric network line is obtained according to each frequency component of the electric energy metering index message of each electric network line in the electric energy metering index message group of the electric network line;
the equation for each frequency component group that obtains the power metering index of the grid line is:
in the equation, JNG l (u, n) is the first frequency component group of the electric energy metering index n of the power grid line, and is the first frequency component of the electric energy metering index message of the corresponding power grid line when the j-th display adjusting code of the electric energy metering index n of the power grid line is the numerical value of the effective magnetic field interference index of eta.
5. The method according to claim 4, wherein after obtaining each frequency component group of the power metering index of the power grid line, the method further comprises:
Obtaining each remaining part group of the electric energy metering index of the power grid line according to each frequency component group of the electric energy metering index of the power grid line and an electric energy metering index equation, wherein the equation is as follows:
within the equation, s l (u, n) is the first remaining group of the power metering index n of the power network line, s l-1 (u, n) is the first-1 remaining part group of the electric energy metering index n of the power grid line, JNG l (u, n) is the first frequency component group of the electric energy metering index n of the power grid line, L is the number of the remaining partial groups, g (u, n) is the electric energy metering index equation of the electric energy metering index n of the power grid line, and u is the value collection time point.
6. The method according to claim 5, wherein after obtaining each remaining portion group of the power metering index of the power grid line, further comprises:
performing Hilbert transformation on each frequency component group to obtain norms of linear operators corresponding to each frequency component group; obtaining a norm equation of the interference-removing linear operator of each frequency component group according to the norm of the linear operator of each frequency component group and a norm soft critical quantity and strong critical quantity equation of the linear operator;
the norm equation for the interference-free linear operator of the frequency component group is:
In equation, c n,l,k Is the norm of the kth linear operator of the kth frequency component group of the electrical energy metering index n of the power grid line, c' n,l,k Is the norm c of the linear operator n,l,k Norms of corresponding interference-removing linear operators, U l Is the norm critical quantity of the linear operator of the first frequency component group, and the norm average of the linear operator of the first frequency component group is calculatedThe multiple is taken as the norm critical quantity of the linear operator, FH () is the symbol equation, c n,l,k Above zero, the value is one, c n,l,k Below zero, its value is negative one, c n,l,k Zero is zero, which is zero; v is the change importance, v is the change coefficient;
after receiving the norm equation of the interference-removing linear operator of each frequency component group, performing interference-removing treatment on the norms of the linear operators in each frequency component group, filtering the norms of the interference-value linear operators, and obtaining the reconstruction group of each frequency component through Hilbert inverse transformation.
7. The method of claim 6, further comprising, after obtaining the reconstruction of each frequency component:
obtaining an electric energy metering index interference elimination equation of the power grid line corresponding to the electric energy metering index of each power grid line according to the reconstruction group of each frequency component and each residual partial group, and performing interference elimination treatment on the numerical value of the electric energy metering index of each power grid line;
The electric energy metering index interference-free equation is:
in the equation, g '(u, n) is the electric energy metering index enhancement value of each electric network line corresponding to each value collection time point u obtained by dividing the electric energy metering index of the electric network line by the interference equation by the electric energy metering index of the electric network line n, and L is the number of frequency component groups, namely the number of remaining partial groups, JNG' l (u, n) is the reconstruction of the frequency components of the first frequency component group of the power metering index n of the power grid line, s l (u, n) is the first remaining group of the electrical energy metering index n of the power grid line.
8. The metering method for complex electromagnetic environment according to claim 7, wherein after obtaining the interference equation of the electric energy metering index of the power grid line corresponding to the electric energy metering index of each power grid line, further comprises:
according to an interference equation of the electric energy metering index of the electric network line of the electric energy metering index of each electric network line, calculating an electric energy metering index enhancement value of each electric network line corresponding to each value collection time point u, obtaining an enhancement value of the electric energy metering index of each electric network line, and constructing an electric energy metering index enhancement value array of the electric network line, wherein the electric energy metering index enhancement value array of the electric network line is:
In the equation, L is an electric energy metering index enhancement numerical array of the power grid line, N is the total amount of electric energy metering indexes of the power grid line, o is the total amount of numerical collection time points, o=500, g ' (1, 1), g ' (1, 2), g ' (1, o) are enhancement numerical values corresponding to electric energy metering indexes of the power grid line at numerical collection time points 1,2, o respectively, g ' (2, 1), g ' (2, 2), g ' (2, o) are enhancement numerical values corresponding to electric energy metering indexes of the power grid line at numerical collection time points 1,2, o respectively, and g ' (N, 1), g ' (N, 2), g ' (N, o) are enhancement numerical values corresponding to metering evaluation parameters N at numerical collection time points 1,2, o respectively.
9. The metering method for complex electromagnetic environment according to claim 8, wherein after constructing the electric energy metering index enhancement value array of the power grid line, further comprises:
to ensure the numerical metering efficacy of the electric energy metering indexes, the actual degree of the interference value of the electric energy metering index enhancement value of each electric network line is obtained according to the distinguishing state between the electric energy metering index enhancement value of each electric network line and the electric energy metering index enhancement value of the adjacent electric network line, and the equation is as follows:
within the equation, A g,(N,o) Is to enhance the realism of the interference value of the value, Is obtained by solving->Smaller values within, BZ () is the z-score normalization method and e is the euler number;
receiving the authenticity of the interference value of each enhancement value, setting the authenticity critical quantity of the interference value, taking the enhancement value with the authenticity higher than the authenticity critical quantity of the interference value as the magnetic field interference value, removing the magnetic field interference value in the electric energy metering index of each power grid line, and obtaining the final value corresponding to the electric energy metering index of each power grid line;
the final value of the electric energy metering index of each power grid line is obtained, the treatment and analysis of the value of the electric energy metering index are achieved, and then the final value is displayed and backed up, so that the purpose of electric energy metering is achieved.
10. A metering device for a complex electromagnetic environment, comprising:
the construction module is used for receiving the numerical value of the electric energy metering index of each power grid line and constructing an electric energy metering index equation of each power grid line;
the treatment module is used for analyzing the value of the electric energy metering index of each power grid line, detecting the value of the extracted magnetic field interference and executing treatment to achieve the treatment of the value of the electric energy metering index.
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