CN118483646B - Intelligent testing system for performance of power metering box - Google Patents
Intelligent testing system for performance of power metering box Download PDFInfo
- Publication number
- CN118483646B CN118483646B CN202410910059.8A CN202410910059A CN118483646B CN 118483646 B CN118483646 B CN 118483646B CN 202410910059 A CN202410910059 A CN 202410910059A CN 118483646 B CN118483646 B CN 118483646B
- Authority
- CN
- China
- Prior art keywords
- metering box
- power metering
- performance
- electromagnetic field
- input voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 17
- 230000005672 electromagnetic field Effects 0.000 claims abstract description 78
- 238000004458 analytical method Methods 0.000 claims abstract description 25
- 238000001514 detection method Methods 0.000 claims abstract description 20
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 230000009471 action Effects 0.000 claims description 23
- 230000008859 change Effects 0.000 claims description 22
- 230000007613 environmental effect Effects 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 12
- 230000015556 catabolic process Effects 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 10
- 238000006731 degradation reaction Methods 0.000 claims description 9
- 238000011009 performance qualification Methods 0.000 claims description 5
- 238000012216 screening Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 238000013178 mathematical model Methods 0.000 claims description 2
- 238000011156 evaluation Methods 0.000 abstract description 6
- 238000005457 optimization Methods 0.000 description 5
- 230000006872 improvement Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000011835 investigation Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000008054 signal transmission Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 230000035772 mutation Effects 0.000 description 2
- 238000013468 resource allocation Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
- Data Mining & Analysis (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Computational Mathematics (AREA)
- Pure & Applied Mathematics (AREA)
- Databases & Information Systems (AREA)
- Software Systems (AREA)
- General Engineering & Computer Science (AREA)
- Algebra (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention belongs to the field of intelligent testing of performance of power metering boxes, and particularly discloses a system for intelligent testing of performance of a power metering box, which comprises the following components: the accuracy detection module ensures measurement accuracy, electric quantity readings under different loads are monitored, the stability detection module evaluates the comprehensive performance deviation coefficient of the electric metering box under different temperatures and humidity so as to analyze stability of the electric metering box, the shielding performance detection module tests the anti-interference capability of the electric metering box in an electromagnetic field, the shielding effectiveness of the electric metering box is evaluated through measurement of input voltage difference values and waveform analysis, the performance compliance analysis module synthesizes the above indexes, the overall performance of the electric metering box is evaluated, finally, the performance compliance judgment module judges whether the electric metering box is qualified according to analysis results and gives out early warning when the electric metering box is unqualified, high performance of the electric metering box under various conditions is ensured, and an accurate evaluation means is provided for the performance of the electric metering box.
Description
Technical Field
The invention belongs to the field of intelligent testing of performance of power metering boxes, and relates to an intelligent testing system of the performance of the power metering boxes.
Background
The intelligent testing system for the performance of the power metering box is a comprehensive system integrating the functions of data acquisition, processing, analysis and display, and the system realizes real-time monitoring and testing of various performance indexes of the power metering box by adopting advanced sensor technology, internet of things technology, cloud computing technology and the like, thereby providing powerful support for quality control and performance optimization of the power metering box.
Although the existing intelligent testing system for the performance of the power metering box meets certain requirements, the intelligent testing system still has limitations, and is specifically embodied in the following steps: 1. the prior art cannot quantify the degree of decline of the performance of the power metering box along with the increase of the electromagnetic interference intensity, so that metering errors caused by electromagnetic interference cannot be effectively prevented, and the prior art cannot intuitively reflect the influence of electromagnetic interference on the signal transmission quality of the power metering box, so that a large amount of time and resources are consumed for fault investigation.
2. In the prior art, when analyzing the performance of the power metering box under different environments, the performance of the power metering box under different environments is not analyzed under the action of each load, so that the performance evaluation result may deviate from the actual performance, and the power metering box frequently has problems in the actual operation, thereby increasing the maintenance and replacement cost.
Disclosure of Invention
In view of this, in order to solve the problems set forth in the background art, an intelligent testing system for the performance of a power metering box is proposed.
The aim of the invention can be achieved by the following technical scheme: the invention provides a power metering box performance intelligent test system, which comprises: an accuracy detection module: a measurement accuracy for gathering electric power metering box corresponds the electric quantity reading of the monitoring time quantum of settlement under each load effect, analysis electric power metering box。
Stability detection module: the system is used for collecting output voltage and output current of the power metering box under the action of each load corresponding to each environment temperature and each environment humidity, and respectively analyzing the comprehensive performance deviation coefficient of the power metering box under each environment temperatureAnd the coefficient of variation of the overall performance at various ambient humiditiesWhereinRepresent the firstThe number corresponding to the temperature of the respective environment,，Represent the firstThe number corresponding to the humidity of the respective environment,Further analyze the stability index of the power metering box。
Shielding performance detection module: is used for collecting the input voltage of the power metering box under the intensity of each electromagnetic field to obtain the input voltage difference value of the power metering box under the intensity of each electromagnetic field, drawing a curve of the variation of the input voltage difference along with the intensity of the electromagnetic field, and analyzing the performance degradation degree index of the power metering box; the method comprises the steps of collecting waveforms of input voltages of the power metering box under the intensity of each electromagnetic field, analyzing an anti-interference degree index of the power metering box, and further analyzing a shielding effectiveness index of the power metering box。
Performance compliance analysis module: the system is used for analyzing the performance compliance of the power metering box according to the accuracy, the stability coefficient and the shielding effectiveness index of the power metering box.
The performance qualification judging module: and the early warning device is used for judging whether the performance of the power metering box is qualified according to the performance conformity of the power metering box, and carrying out early warning when the performance of the power metering box is unqualified.
Database: the method is used for storing rated power of each load, input voltage of the power metering box when no electromagnetic field intensity interference exists and input voltage standard waveforms of the power metering box when no electromagnetic field intensity interference exists.
Compared with the prior art, the invention has the following beneficial effects: (1) According to the invention, the metering accuracy of the power metering box is analyzed by collecting the electric quantity readings of the power metering box in the corresponding set monitoring time period under the action of each load, so that the metering accuracy of the power metering box can be evaluated, the accurate and reliable recording of the electric energy service condition is ensured, the metering accuracy of the power metering box can be improved by correcting the metering error in time, and the economic loss caused by inaccurate metering is avoided.
(2) According to the invention, through collecting the output voltage and the output current of the power metering box corresponding to each environment temperature and each environment humidity under the action of each load, the performance of the power metering box is fully and carefully evaluated, the limitation of evaluation under a single condition is avoided, the specific environment conditions which may have performance deviation are accurately positioned through analyzing the comprehensive performance deviation coefficient under each environment temperature and humidity, a clear direction is provided for improvement and optimization, the long-term stable operation capability of the power metering box in a complex environment can be effectively judged through analyzing the stability index, and possible faults and instabilities are prevented in advance.
(3) The invention can quantify the descending degree of the electric power metering box performance along with the increase of the electromagnetic interference intensity by establishing the curve of the input voltage difference value and the electromagnetic field intensity change and calculating the maximum tangential slope, can avoid metering errors or equipment damage caused by electromagnetic interference, reduce the fault occurrence frequency, prolong the service life of equipment, provide quantified indexes for optimizing design and maintenance, intuitively reflect the influence of electromagnetic interference on the signal transmission quality of the electric power metering box by deeply analyzing the input voltage waveform, including the waveform distortion degree, the identification and statistics of abrupt change points and fracture points, and help to quickly locate and solve the potential signal integrity problem, enhance the pertinence and efficiency of fault diagnosis and reduce the time and resources required by fault investigation.
(4) According to the invention, the performance compliance of the power metering box is analyzed according to the accuracy, stability coefficient and shielding effectiveness index of the power metering box, so that the performance of the power metering box can be comprehensively evaluated, the power metering box is ensured to meet the use requirements on the key indexes, and when the performance is found to be inconsistent with the expectations, the problem can be rapidly positioned, thereby guiding the subsequent improvement and optimization.
(5) According to the invention, whether the performance of the power metering box is qualified or not is judged according to the performance conformity of the power metering box, and when the performance of the power metering box is unqualified, early warning is carried out, so that the performance problem of the power metering box can be found in time, thereby avoiding economic loss caused by inaccurate metering, and accurate performance evaluation and early warning are beneficial to power enterprises to better know the running state of the power metering box, so that resource allocation is optimized, and the overall running efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present 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 schematic diagram of the connection of the modules of the system of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the present invention provides an intelligent testing system for performance of a power metering box, comprising: the system comprises an accuracy detection module, a stability detection module, a shielding performance detection module, a performance coincidence analysis module, a performance qualification judgment module and a database.
The performance compliance analysis module is respectively connected with the accuracy detection module, the stability detection module and the shielding performance detection module, the performance qualification judgment module is connected with the performance compliance analysis module, and the database is respectively connected with the accuracy detection module and the shielding performance detection module.
The accuracy detection module: a measurement accuracy for gathering electric power metering box corresponds the electric quantity reading of the monitoring time quantum of settlement under each load effect, analysis electric power metering box。
Further, the analysis power metering box metering accuracy includes: the electric quantity reading of the electric power metering box in the monitoring time period correspondingly set under the action of each load is recorded asWhereinRepresent the firstThe number corresponding to the number of the load,。
Extracting rated power of each load from a database, multiplying the rated power of each load by the duration corresponding to the set monitoring time period to obtain rated power value of each load, and recording as。
Analysis of metering accuracy of power metering box，，Indicating the total number of loads.
According to the invention, the metering accuracy of the power metering box is analyzed by collecting the electric quantity readings of the power metering box in the corresponding set monitoring time period under the action of each load, so that the metering accuracy of the power metering box can be evaluated, the accurate and reliable recording of the electric energy service condition is ensured, the metering accuracy of the power metering box can be improved by correcting the metering error in time, and the economic loss caused by inaccurate metering is avoided.
The stability detection module: the system is used for collecting output voltage and output current of the power metering box under the action of each load corresponding to each environment temperature and each environment humidity, and respectively analyzing the comprehensive performance deviation coefficient of the power metering box under each environment temperatureAnd the coefficient of variation of the overall performance at various ambient humiditiesWhereinRepresent the firstThe number corresponding to the temperature of the respective environment,，Represent the firstThe number corresponding to the humidity of the respective environment,Further analyze the stability index of the power metering box。
Further, the analyzing the comprehensive performance deviation coefficient of the power metering box at each environmental temperature comprises the following steps: the output voltage and the output current of the electric power metering box corresponding to each environment temperature under the action of each load are respectively recorded asAnd。
Comparing each environmental temperature with the proper temperature to obtain the ratio of each environmental temperature to the proper temperature, and taking the ratio as the deviation coefficient of each environmental temperature to be recorded as。
Analyzing reference voltage of power metering box corresponding to each environmental temperature under the action of each load，WhereinIndicating that the power metering box is at the firstThe individual loads correspond to nominal voltages at normal ambient temperature.
According to the analysis mode of the reference voltage of the power metering box corresponding to each environment temperature under the action of each load, the reference current of the power metering box corresponding to each environment temperature under the action of each load is obtained in the same way and is recorded as。
Further, a specific formula for analyzing the comprehensive performance deviation coefficient of the power metering box at each environmental temperature is as follows: wherein AndIndicating the weights corresponding to the voltage deviation index and the current deviation index at the set ambient temperature, and。
As a preferred embodiment, theAndThe voltage stability is critical to the overall operation of the power system, the voltage deviation is too large, equipment damage and system breakdown can be caused, even normal operation of user side equipment is affected, although the current deviation is equally important, the matching condition of actual load and expected load in the system, line loss, transformer efficiency and the like are reflected, the influence of the current deviation on the system stability is relatively indirect, and therefore the weight corresponding to the voltage deviation index at the ambient temperature is larger than the weight corresponding to the current deviation index.
The specific process for analyzing the comprehensive performance deviation coefficient of the power metering box under each environmental humidity is as follows: the output voltage and the output current of the electric power metering box corresponding to each environmental humidity under the action of each load are respectively recorded asAnd。
Comparing the humidity of each environment with the proper humidity to obtain the ratio of the humidity of each environment to the proper humidity, and taking the ratio as the deviation coefficient of the humidity of each environment to record as。
Analyzing reference voltage of power metering box corresponding to each environmental humidity under the action of each load，WhereinIndicating that the power metering box is at the firstThe individual loads correspond to nominal voltages at normal ambient humidity.
According to the analysis mode of the reference voltage of the power metering box corresponding to each environmental humidity under the action of each load, the reference current of the power metering box corresponding to each environmental humidity under the action of each load is obtained in the same way and is recorded as。
Further, a specific formula for analyzing the comprehensive performance deviation coefficient of the power metering box under each environmental humidity is as follows: wherein AndIndicating the weights corresponding to the voltage deviation index and the current deviation index under the set environmental humidity, and。
As a preferred embodiment, theAndCan set to 0.6 and 0.4 respectively, the stability of voltage directly influences the normal work of the inside electronic component of electric power metering box, and the voltage deviation is too big can lead to electronic component's damage, ageing acceleration, even direct burn, seriously influences the reliability and the life of electric power metering box, and the electric current deviation can directly influence the accuracy of electric power metering. Although the current deviation does not directly damage the equipment like the voltage deviation, the long-term accumulated error may cause inaccurate calculation of the electric charge, and thus the weight corresponding to the voltage deviation index under the ambient humidity is greater than the weight corresponding to the current deviation index.
Further, the specific formula for analyzing the stability index of the power metering box is as follows: wherein Indicating a reference integrated performance deviation coefficient of the set power metering box at the ambient temperature,Indicating the reference comprehensive performance deviation coefficient of the set power metering box under the environment humidity,Indicating the total amount of ambient temperature,Indicating the total amount of ambient humidity, whereinIndicating the comprehensive performance deviation coefficient of the set power metering box at the ambient temperature,The weight corresponding to the current deviation coefficient of the set power metering box under the environment humidity is shown, and。
As a preferred embodiment, theIt may be set to 0.6,The environment temperature is one of key factors influencing the performance of the power metering box, electronic elements and mechanical structures inside the power metering box may show different performance characteristics at different temperatures, such as resistance change, expansion with heat, contraction with cold and the like, the environment humidity also has important influence on the performance of the power metering box, and high humidity may cause problems of corrosion, electric leakage and the like of the elements inside the power metering box, so that the metering accuracy and the safety are influenced, however, compared with temperature, the influence of humidity on the performance of the power metering box is relatively small, and therefore the weight corresponding to the comprehensive performance deviation coefficient of the power metering box at the environment temperature is larger than the weight corresponding to the current deviation coefficient of the power metering box at the environment humidity.
According to the invention, through collecting the output voltage and the output current of the power metering box corresponding to each environment temperature and each environment humidity under the action of each load, the performance of the power metering box is fully and carefully evaluated, the limitation of evaluation under a single condition is avoided, the specific environment conditions which may have performance deviation are accurately positioned through analyzing the comprehensive performance deviation coefficient under each environment temperature and humidity, a clear direction is provided for improvement and optimization, the long-term stable operation capability of the power metering box in a complex environment can be effectively judged through analyzing the stability index, and possible faults and instabilities are prevented in advance.
Shielding performance detection module: is used for collecting the input voltage of the power metering box under the intensity of each electromagnetic field to obtain the input voltage difference value of the power metering box under the intensity of each electromagnetic field, drawing a curve of the variation of the input voltage difference along with the intensity of the electromagnetic field, and analyzing the performance degradation degree index of the power metering box; the method comprises the steps of collecting waveforms of input voltages of the power metering box under the intensity of each electromagnetic field, analyzing an anti-interference degree index of the power metering box, and further analyzing a shielding effectiveness index of the power metering box。
Further, the analyzing the performance degradation degree index of the power metering box includes: and collecting the input voltage of the power metering box under the intensity of each electromagnetic field through a voltmeter.
The input voltage of the power metering box when no electromagnetic field intensity interference exists is extracted from the database and used as the reference voltage of the power metering box.
And comparing the reference voltage of the power metering box with the input voltage under the intensity of each electromagnetic field to obtain the difference value between the reference voltage of the power metering box and the input voltage under the intensity of each electromagnetic field, and taking the difference value as the difference value between the input voltage of the power metering box under the intensity of each electromagnetic field.
Establishing a coordinate system by taking the electromagnetic field intensity as an abscissa and taking the voltage difference value as an ordinate, marking corresponding data points in the coordinate system according to the input voltage difference value of the electric power metering box under each electromagnetic field intensity, drawing a curve of the input voltage difference value changing along with the electromagnetic field intensity by utilizing a mathematical model establishing method, further obtaining the maximum tangent slope of the curve of the input voltage difference value changing along with the electromagnetic field intensity, taking the maximum tangent slope as the change rate of the curve of the input voltage difference value changing along with the electromagnetic field intensity, and marking the change rate as the change rate of the curve of the input voltage difference value changing along with the electromagnetic field intensity。
Analyzing performance degradation degree index of power metering box，WhereinA reference change rate of a curve representing a set input voltage difference value with the change of the electromagnetic field intensity.
Further, the analyzing the anti-interference degree index of the power metering box includes: and recognizing and obtaining the waveform of the input voltage of the power metering box under the intensity of each electromagnetic field through an oscilloscope.
And extracting standard waveforms of input voltages of the power metering box under the intensity of each electromagnetic field from the database.
Comparing the waveform of the input voltage of the power metering box under each electromagnetic field intensity with a standard waveform to obtain misaligned line segments in the waveform of the input voltage of the power metering box under each electromagnetic field intensity, and further obtaining the length and the period corresponding to the misaligned line segments in the waveform of the input voltage of the power metering box under each electromagnetic field intensity.
Analyzing waveform distortion degree of input voltage of power metering box under each electromagnetic field intensity，WhereinAndRespectively show that the power metering box is at the firstMisalignment of waveforms of input voltages at electromagnetic field intensitiesThe length corresponding to the individual line segments and the standard length,Representing the total number of line segments, whereRepresent the firstThe number corresponding to the intensity of the electromagnetic field,，Represent the firstThe numbers corresponding to the line segments are used,。
Comparing the peak value and the valley value of the period corresponding to each misaligned segment in the waveform of the input voltage of the power metering box under each electromagnetic field intensity to obtain the difference value of the peak value and the valley value of the period corresponding to each misaligned segment, taking the difference value as the amplitude variation of the period corresponding to each misaligned segment in the waveform of the input voltage of the power metering box under each electromagnetic field intensity, further judging the number of abrupt points in the waveform of the input voltage of the power metering box under each electromagnetic field intensity, and recording as。
Screening out discontinuous line segments from the line segments which are not overlapped in the waveform of the input voltage of the electric power metering box under the intensity of each electromagnetic field, further screening out and counting the number of the discontinuous line segments in the waveform of the input voltage of the electric power metering box under the intensity of each electromagnetic field, and recording as。
Analysis of anti-interference degree index of power metering box，WhereinIndicating the total number of electromagnetic field strengths,、AndThe allowable twist degree, the allowable abrupt change number and the allowable fracture number on the waveform of the set input voltage are respectively represented,、AndRespectively represent the weights corresponding to the distortion degree, the abrupt change number and the breaking number on the waveform of the set input voltage, and。
As a preferred embodiment, the、AndThe distortion degree of the waveform can be set to be 0.4, 0.3 and 0.3 respectively, the interference degree of the input voltage signal in the transmission process is directly reflected, the abrupt change quantity refers to the quantity of points which suddenly change on the input voltage waveform, the breaking quantity refers to the quantity of points which are broken or missing in the signal and appear on the input voltage waveform, and therefore the weight corresponding to the distortion degree on the waveform of the input voltage is larger than the weight corresponding to the abrupt change quantity and the breaking quantity on the waveform of the input voltage.
The specific process for judging the number of abrupt points in the waveform of the input voltage of the power metering box under the intensity of each electromagnetic field is as follows: comparing the amplitude variation of the period corresponding to each line segment which is not overlapped in the waveform of the input voltage of the power metering box under the electromagnetic field intensity with a preset amplitude variation threshold value, and if the amplitude variation of the period corresponding to a certain line segment which is not overlapped in the waveform of the input voltage of the power metering box under the electromagnetic field intensity is larger than the preset amplitude variation threshold value, taking the period corresponding to the line segment which is not overlapped in the waveform of the input voltage of the power metering box under the electromagnetic field intensity as a mutation point, and further screening and counting the number of the mutation points in the waveform of the input voltage of the power metering box under the electromagnetic field intensity.
Further, the specific formula for analyzing the shielding effectiveness index of the power metering box is as followsWhereinA weight factor corresponding to the anti-interference degree index of the set power metering box is represented,A weight factor corresponding to the performance degradation degree index of the set power metering box is represented, and。
As a preferred embodiment, theIt may be set to 0.5,The anti-interference degree index can be set to 0.5, so that the stability and reliability of the power metering box in an electromagnetic interference environment are directly reflected, and the degree of performance reduction of the power metering box under electromagnetic interference is quantified by the performance reduction degree index, and the weight factors corresponding to the anti-interference degree index and the performance reduction degree index of the power metering box are equal.
The invention can quantify the descending degree of the electric power metering box performance along with the increase of the electromagnetic interference intensity by establishing the curve of the input voltage difference value and the electromagnetic field intensity change and calculating the maximum tangential slope, can avoid metering errors or equipment damage caused by electromagnetic interference, reduce the fault occurrence frequency, prolong the service life of equipment, provide quantified indexes for optimizing design and maintenance, intuitively reflect the influence of electromagnetic interference on the signal transmission quality of the electric power metering box by deeply analyzing the input voltage waveform, including the waveform distortion degree, the identification and statistics of abrupt change points and fracture points, and help to quickly locate and solve the potential signal integrity problem, enhance the pertinence and efficiency of fault diagnosis and reduce the time and resources required by fault investigation.
Performance compliance analysis module: the system is used for analyzing the performance compliance of the power metering box according to the accuracy, the stability coefficient and the shielding effectiveness index of the power metering box.
Further, the specific formula for analyzing the performance conformity of the power metering box is as follows: wherein 、AndRespectively represent the weight factors corresponding to the metering accuracy, the stability index and the shielding performance index of the set power metering box, and。
As a preferred embodiment, the、AndCan set to 0.4, 0.3 and 0.3 respectively, the measurement accuracy is one of the performance index of electric power metering box core, directly relates to the accuracy of electric power measurement, and stability index has reflected the stable performance of electric power metering box at long-time operation in-process, and shielding performance index has reflected the resistance ability of electric power metering box to outside electromagnetic interference, and consequently the weight that electric power metering box's measurement accuracy corresponds is greater than the weight that electric power metering box's stability index and shielding performance index correspond.
According to the invention, the performance compliance of the power metering box is analyzed according to the accuracy, stability coefficient and shielding effectiveness index of the power metering box, so that the performance of the power metering box can be comprehensively evaluated, the power metering box is ensured to meet the use requirements on the key indexes, and when the performance is found to be inconsistent with the expectations, the problem can be rapidly positioned, thereby guiding the subsequent improvement and optimization.
The performance qualification judging module: and the early warning device is used for judging whether the performance of the power metering box is qualified according to the performance conformity of the power metering box, and carrying out early warning when the performance of the power metering box is unqualified.
Further, the specific process for judging whether the performance of the power metering box is qualified is as follows: and comparing the performance compliance of the power metering box with a preset performance compliance threshold of the power metering box, and if the performance compliance of the power metering box is smaller than the preset performance compliance threshold of the power metering box, comparing, so that the performance of the power metering box is unqualified.
According to the invention, whether the performance of the power metering box is qualified or not is judged according to the performance conformity of the power metering box, and when the performance of the power metering box is unqualified, early warning is carried out, so that the performance problem of the power metering box can be found in time, thereby avoiding economic loss caused by inaccurate metering, and accurate performance evaluation and early warning are beneficial to power enterprises to better know the running state of the power metering box, so that resource allocation is optimized, and the overall running efficiency is improved.
Database: the method is used for storing rated power of each load, input voltage of the power metering box when no electromagnetic field intensity interference exists and input voltage standard waveforms of the power metering box when no electromagnetic field intensity interference exists.
The foregoing is merely illustrative and explanatory of the principles of this invention, as various modifications and additions may be made to the specific embodiments described, or similar arrangements may be substituted by those skilled in the art, without departing from the principles of this invention or beyond the scope of this invention as defined in the claims.
Claims (3)
1. An electric power batch meter performance wisdom test system, its characterized in that: comprising the following steps:
An accuracy detection module: a measurement accuracy for gathering electric power metering box corresponds the electric quantity reading of the monitoring time quantum of settlement under each load effect, analysis electric power metering box ；
Stability detection module: the system is used for collecting output voltage and output current of the power metering box under the action of each load corresponding to each environment temperature and each environment humidity, and respectively analyzing the comprehensive performance deviation coefficient of the power metering box under each environment temperatureAnd the coefficient of variation of the overall performance at various ambient humiditiesWhereinRepresent the firstThe number corresponding to the temperature of the respective environment,，Represent the firstThe number corresponding to the humidity of the respective environment,Further analyze the stability index of the power metering box；
Shielding performance detection module: is used for collecting the input voltage of the power metering box under the intensity of each electromagnetic field to obtain the input voltage difference value of the power metering box under the intensity of each electromagnetic field, drawing a curve of the variation of the input voltage difference along with the intensity of the electromagnetic field, and analyzing the performance degradation degree index of the power metering box; the method comprises the steps of collecting waveforms of input voltages of the power metering box under the intensity of each electromagnetic field, analyzing an anti-interference degree index of the power metering box, and further analyzing a shielding effectiveness index of the power metering box；
Performance compliance analysis module: the system is used for analyzing the performance compliance of the power metering box according to the accuracy, the stability coefficient and the shielding effectiveness index of the power metering box;
The performance qualification judging module: the early warning device is used for judging whether the performance of the power metering box is qualified according to the performance conformity of the power metering box, and carrying out early warning when the performance of the power metering box is unqualified;
database: the standard waveform is used for storing rated power of each load, input voltage of the power metering box when no electromagnetic field intensity interference exists and input voltage of the power metering box under each electromagnetic field intensity;
The measurement accuracy of analysis power metering box includes:
the electric quantity reading of the electric power metering box in the monitoring time period correspondingly set under the action of each load is recorded as WhereinRepresent the firstThe number corresponding to the number of the load,；
Extracting rated power of each load from a database, multiplying the rated power of each load by the duration corresponding to the set monitoring time period to obtain rated power value of each load, and recording as；
Analysis of metering accuracy of power metering box，，Representing the total number of loads;
The analysis of the integrated performance deviation coefficient of the power metering box at each environmental temperature comprises the following steps:
The output voltage and the output current of the electric power metering box corresponding to each environment temperature under the action of each load are respectively recorded as And；
Comparing each environmental temperature with the proper temperature to obtain the ratio of each environmental temperature to the proper temperature, and taking the ratio as the deviation coefficient of each environmental temperature to be recorded as；
Analyzing reference voltage of power metering box corresponding to each environmental temperature under the action of each load，WhereinIndicating that the power metering box is at the firstThe rated voltage under the action of the individual loads corresponds to the rated voltage under the normal ambient temperature;
According to the analysis mode of the reference voltage of the power metering box corresponding to each environment temperature under the action of each load, the reference current of the power metering box corresponding to each environment temperature under the action of each load is obtained in the same way and is recorded as ；
The specific formula for analyzing the comprehensive performance deviation coefficient of the power metering box at each environmental temperature is as follows: wherein AndIndicating the weights corresponding to the voltage deviation index and the current deviation index at the set ambient temperature, and；
The specific formula for analyzing the stability index of the power metering box is as follows: wherein Indicating a reference integrated performance deviation coefficient of the set power metering box at the ambient temperature,Indicating the reference comprehensive performance deviation coefficient of the set power metering box under the environment humidity,Indicating the total amount of ambient temperature,Indicating the total amount of ambient humidity, whereinIndicating the comprehensive performance deviation coefficient of the set power metering box at the ambient temperature,The weight corresponding to the current deviation coefficient of the set power metering box under the environment humidity is shown, and；
The analysis power metering box performance degradation degree index includes:
Acquiring input voltage of the power metering box under the intensity of each electromagnetic field through a voltmeter;
extracting the input voltage of the power metering box when no electromagnetic field intensity interference exists from a database, and taking the input voltage as the reference voltage of the power metering box;
Comparing the reference voltage of the power metering box with the input voltage under each electromagnetic field intensity to obtain the difference value between the reference voltage of the power metering box and the input voltage under each electromagnetic field intensity, and taking the difference value as the input voltage difference value of the power metering box under each electromagnetic field intensity;
Establishing a coordinate system by taking the electromagnetic field intensity as an abscissa and taking the voltage difference value as an ordinate, marking corresponding data points in the coordinate system according to the input voltage difference value of the electric power metering box under each electromagnetic field intensity, drawing a curve of the input voltage difference value changing along with the electromagnetic field intensity by utilizing a mathematical model establishing method, further obtaining the maximum tangent slope of the curve of the input voltage difference value changing along with the electromagnetic field intensity, taking the maximum tangent slope as the change rate of the curve of the input voltage difference value changing along with the electromagnetic field intensity, and marking the change rate as the change rate of the curve of the input voltage difference value changing along with the electromagnetic field intensity ；
Analyzing performance degradation degree index of power metering box，WhereinA reference change rate of a curve representing a set input voltage difference value with the change of the electromagnetic field intensity;
The anti-interference degree index of the analysis power metering box comprises:
the waveform of the input voltage of the power metering box under the intensity of each electromagnetic field is obtained through oscilloscope identification;
Extracting standard waveforms of input voltages of the power metering box under the intensity of each electromagnetic field from a database;
Comparing the waveform of the input voltage of the power metering box under each electromagnetic field intensity with a standard waveform to obtain misaligned line segments in the waveform of the input voltage of the power metering box under each electromagnetic field intensity, and further obtaining the length and the period corresponding to the misaligned line segments in the waveform of the input voltage of the power metering box under each electromagnetic field intensity;
Analyzing waveform distortion degree of input voltage of power metering box under each electromagnetic field intensity ，WhereinAndRespectively show that the power metering box is at the firstMisalignment of waveforms of input voltages at electromagnetic field intensitiesThe length corresponding to the individual line segments and the standard length,Representing the total number of line segments, whereRepresent the firstThe number corresponding to the intensity of the electromagnetic field,，Represent the firstThe numbers corresponding to the line segments are used,；
Comparing the peak value and the valley value of the period corresponding to each misaligned segment in the waveform of the input voltage of the power metering box under each electromagnetic field intensity to obtain the difference value of the peak value and the valley value of the period corresponding to each misaligned segment, taking the difference value as the amplitude variation of the period corresponding to each misaligned segment in the waveform of the input voltage of the power metering box under each electromagnetic field intensity, further judging the number of abrupt points in the waveform of the input voltage of the power metering box under each electromagnetic field intensity, and recording as；
Screening out discontinuous line segments from the line segments which are not overlapped in the waveform of the input voltage of the electric power metering box under the intensity of each electromagnetic field, further screening out and counting the number of the discontinuous line segments in the waveform of the input voltage of the electric power metering box under the intensity of each electromagnetic field, and recording as；
Analysis of anti-interference degree index of power metering box，WhereinIndicating the total number of electromagnetic field strengths,、AndThe allowable twist degree, the allowable abrupt change number and the allowable fracture number on the waveform of the set input voltage are respectively represented,、AndRespectively represent the weights corresponding to the distortion degree, the abrupt change number and the breaking number on the waveform of the set input voltage, and；
The specific formula for analyzing the shielding effectiveness index of the power metering box is as followsWhereinA weight factor corresponding to the anti-interference degree index of the set power metering box is represented,A weight factor corresponding to the performance degradation degree index of the set power metering box is represented, and。
2. The intelligent power metering box performance testing system according to claim 1, wherein: the specific formula for analyzing the performance conformity of the power metering box is as follows: wherein 、AndRespectively represent the weight factors corresponding to the metering accuracy, the stability index and the shielding performance index of the set power metering box, and。
3. The intelligent power metering box performance testing system according to claim 1, wherein: the specific process for judging whether the performance of the power metering box is qualified is as follows:
And comparing the performance compliance of the power metering box with a preset performance compliance threshold of the power metering box, and if the performance compliance of the power metering box is smaller than the preset performance compliance threshold of the power metering box, comparing, so that the performance of the power metering box is unqualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410910059.8A CN118483646B (en) | 2024-07-09 | 2024-07-09 | Intelligent testing system for performance of power metering box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410910059.8A CN118483646B (en) | 2024-07-09 | 2024-07-09 | Intelligent testing system for performance of power metering box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118483646A CN118483646A (en) | 2024-08-13 |
| CN118483646B true CN118483646B (en) | 2024-09-27 |
Family
ID=92198095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410910059.8A Active CN118483646B (en) | 2024-07-09 | 2024-07-09 | Intelligent testing system for performance of power metering box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118483646B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118670459B (en) * | 2024-08-20 | 2024-12-10 | 中电装备山东电子有限公司 | An intelligent early warning system for the operating environment of an outdoor power metering box |
| CN118688558B (en) * | 2024-08-23 | 2024-12-10 | 江苏苏爱尔电力设备有限公司 | An intelligent testing system for electrical distribution products |
| CN119508864B (en) * | 2024-11-04 | 2025-06-20 | 中山市中际电器有限公司 | A method for intelligent monitoring and analysis of range hood control panel performance |
| CN119375815A (en) * | 2024-12-31 | 2025-01-28 | 圣普电气有限公司 | Electric energy meter calibration method and calibration platform |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106932748A (en) * | 2016-09-18 | 2017-07-07 | 北京市计量检测科学研究院 | Electric energy meter tests means for anti-jamming |
| CN108663650A (en) * | 2018-04-23 | 2018-10-16 | 北京市计量检测科学研究院 | Watt-hour meter's field test device and method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7109698B2 (en) * | 2001-03-14 | 2006-09-19 | The Board Of Regents, University Of Oklahoma | Electric-field meter having current compensation |
| HU228288B1 (en) * | 2005-10-05 | 2013-02-28 | Antal Gasparics | Electricity meter with measuring device and with apparatus inspecting for proper operation of the measuring device |
| US11038362B1 (en) * | 2017-09-29 | 2021-06-15 | Technology For Energy Corporation | Self-contained power signal generation system for electricity meter testing |
| CN111562542A (en) * | 2020-05-31 | 2020-08-21 | 宁夏隆基宁光仪表股份有限公司 | Electric energy meter fault excitation test environment construction system and method |
| CN117674111A (en) * | 2023-12-05 | 2024-03-08 | 众华电子科技(太仓)有限公司 | Intelligent operation safety assessment system suitable for base station power supply |
| CN118011307B (en) * | 2024-04-08 | 2024-08-09 | 中电装备山东电子有限公司 | Electric energy meter fault data monitoring system and data storage medium |
| CN118278624B (en) * | 2024-06-04 | 2024-09-27 | 中电装备山东电子有限公司 | Intelligent analysis system for electric power monitoring data based on mutual inductor |
-
2024
- 2024-07-09 CN CN202410910059.8A patent/CN118483646B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106932748A (en) * | 2016-09-18 | 2017-07-07 | 北京市计量检测科学研究院 | Electric energy meter tests means for anti-jamming |
| CN108663650A (en) * | 2018-04-23 | 2018-10-16 | 北京市计量检测科学研究院 | Watt-hour meter's field test device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN118483646A (en) | 2024-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN118483646B (en) | Intelligent testing system for performance of power metering box | |
| CN106199305A (en) | Underground coal mine electric power system dry-type transformer insulation health state evaluation method | |
| CN118011307B (en) | Electric energy meter fault data monitoring system and data storage medium | |
| CN105866638A (en) | City network cable joint insulation state online monitoring apparatus early warning apparatus and method | |
| CN119291518B (en) | A BMS testing method, device, equipment and storage medium | |
| CN118501602B (en) | Electronic product aging detection method, system and storage medium | |
| CN118362819A (en) | Portable charging pile detection method and system | |
| CN117937686A (en) | Intelligent battery management method and system | |
| CN119395568B (en) | An intelligent detection system for battery failures in new energy vehicles | |
| CN119001585B (en) | A transformer operation status monitoring terminal based on artificial intelligence | |
| CN115015623B (en) | Mining equipment operation safety evaluation system based on big data | |
| CN118551334A (en) | Performance test system for aluminum electrolytic capacitor | |
| CN115759761A (en) | Intelligent operation data management system for electric energy metering device | |
| CN117764167A (en) | Intelligent fault reasoning method for inverter | |
| CN118501800A (en) | Fault detection method and system based on electric meter | |
| CN119335319A (en) | A cable detection and positioning system for transmission lines | |
| CN111077380A (en) | Full-automatic detection system for operation capacity of transformer | |
| CN118687627A (en) | A comprehensive test method for automobile wiring harness | |
| CN118759370A (en) | A method and system for evaluating accident battery damage based on Internet of Vehicles big data | |
| CN115343579A (en) | Power grid fault analysis method and device and electronic equipment | |
| CN116008903A (en) | Evaluation method for the influence of complex power consumption conditions on the operation status of smart electric energy meters | |
| CN118858752B (en) | Intelligent electric energy meter with data self-checking function and data processing method | |
| CN118962564B (en) | Mutual inductor operation test system based on data analysis | |
| CN118552177B (en) | An intelligent management system for the entire life cycle of equipment scrapping | |
| CN119881563B (en) | A composite insulator state prediction method based on improved physical model of surface resistance and leakage current |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |