CN117110691B - Power equipment data acquisition system - Google Patents

Power equipment data acquisition system Download PDF

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CN117110691B
CN117110691B CN202311372715.5A CN202311372715A CN117110691B CN 117110691 B CN117110691 B CN 117110691B CN 202311372715 A CN202311372715 A CN 202311372715A CN 117110691 B CN117110691 B CN 117110691B
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voltage
current
constant
power supply
parameter
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CN117110691A (en
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张校玮
燕永振
刘立广
魏军义
岳文欢
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Weihai Ruien Electronic Co ltd
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Weihai Ruien Electronic Co ltd
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    • 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
    • G06F17/18—Complex mathematical operations for evaluating statistical data, e.g. average values, frequency distributions, probability functions, regression analysis
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Data Mining & Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Power Engineering (AREA)
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  • Databases & Information Systems (AREA)
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  • General Engineering & Computer Science (AREA)
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  • Human Computer Interaction (AREA)
  • Bioinformatics & Computational Biology (AREA)
  • Control Of Voltage And Current In General (AREA)

Abstract

The invention discloses a data acquisition system of power equipment, which comprises an acquisition unit, an analysis unit and a display unit. According to the invention, by arranging the constant voltage power supply and the constant current power supply, the corresponding electric power data is acquired by the acquisition unit, and then the corresponding electric power data is subjected to compensation analysis by the analysis unit, so that a corresponding compensation analysis result is obtained, and the corresponding compensation analysis result is used as a compensation parameter of the corresponding electric power data acquired by the acquisition unit in the target electric power equipment, so that the calibration and accurate acquisition of the electric power equipment data acquisition system are realized; the voltage parameter collected by the constant voltage power supply through the constant voltage collection module and the current parameter collected by the constant current collection module through the constant current power supply are respectively compared with the rated voltage of the constant voltage power supply and the rated current of the constant current power supply, an abnormal judgment value is calculated, and then fault diagnosis is carried out on the power data collection result according to the abnormal judgment value, so that the fault diagnosis accuracy of the power monitoring data is improved.

Description

Power equipment data acquisition system
Technical Field
The invention relates to the technical field of information automation, in particular to a data acquisition system of power equipment.
Background
In the operation of the power equipment, voltage and current measurement is the basis of system operation state evaluation, and in the measurement process of utilizing a voltage and current sensor, since the power supply of the power equipment is unstable, impact current can occur, the current value of the impact current is several times of the measurement range of the current sensor, and the current sensor is magnetically biased or damaged. In practical application, when the current sensor is magnetically biased, the measurement error is increased; when the current sensor is damaged, the current sensor is difficult to find in time, and measurement errors are caused.
Therefore, the application provides the power equipment data acquisition system, which realizes the calibration and accurate acquisition of the power equipment data acquisition system and can alarm whether the acquisition system works normally.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a data acquisition system of power equipment, which solves the problems in the background technology.
In order to achieve the above purpose, the invention is realized by the following technical scheme: a power equipment data acquisition system comprising:
The acquisition unit comprises a main line acquisition module, a constant voltage acquisition module and a constant current acquisition module, and is used for respectively acquiring respective power data on target power equipment, a constant voltage power supply and a constant current power supply, and then sending the power data to the analysis unit;
the constant voltage power supply and the constant current power supply are respectively used for acquiring corresponding electric power data acquired by the acquisition unit and analyzing the corresponding electric power data through the analysis unit to obtain corresponding compensation analysis results;
the analysis unit is used for acquiring all the power data acquired by the acquisition unit, carrying out compensation analysis on the power data acquired by the target power equipment through the power data on the constant voltage power supply and the constant current power supply, obtaining the display voltage and the display current of the target power equipment according to the compensation analysis result, and then sending the display voltage and the display current to the display unit;
and the display unit is used for displaying the display current and the display voltage.
Preferably, the power data includes a current parameter, a voltage parameter.
Preferably, the compensation analysis is as follows:
SA1, marking the actual current parameter and the actual voltage parameter obtained by the constant voltage acquisition module as I S1 and U S1 respectively;
Then, using ohm's law: i L1=US1/R, calculating the theoretical current I L1 of the constant-voltage power supply;
Then, obtaining a difference value I c between the actual current parameter and the theoretical current of the constant-voltage power supply through I c=|IS1-IL1 I;
wherein R represents a resistor, wherein the resistors at the output ends of the constant voltage power supply and the constant current power supply are the same, and the resistor is a fixed value;
SA2, marking the actual current parameter and the actual voltage parameter obtained by the constant current acquisition module as I S2 and U S2 respectively;
Using ohm's law: u L2=IS2 is equal to R, and the theoretical voltage U L2 of the constant-current power supply is calculated;
Then obtaining a difference value U c between the actual voltage parameter and the theoretical voltage of the constant-current power supply through U c=|US2-UL2 I;
SA3, acquiring power data generated by a plurality of constant voltage power supplies and constant current power supplies at different time nodes in a specified period, sequentially calculating the difference value between the actual current parameters of the constant voltage power supplies and the theoretical current and the difference value between the actual voltage parameters of the constant current power supplies and the theoretical voltage, which are obtained by the power data at each time node, according to the modes of the step SA1 and the step SA2, and respectively recording the difference values as U ci and I ci;
Wherein i=1, 2, … … n, n represents the number of time nodes in a specified period, I represents the number of the time nodes, U ci represents the difference value between the actual current parameter and the theoretical current of the constant-voltage power supply, and I ci represents the difference value between the actual voltage parameter and the theoretical voltage of the constant-voltage power supply;
SA4, respectively calculating the difference value between the actual current parameter of the constant-voltage power supply and the theoretical current and the discrete degree between the actual voltage parameter of the constant-voltage power supply and the theoretical voltage by using a discrete degree calculation formula, removing the corresponding difference value which causes the excessive discrete degree according to a preset discrete threshold value, reserving the rest corresponding difference values which are not removed, calculating the average value of the corresponding difference values, and respectively recording the corresponding average value as a voltage compensation value and a current compensation value;
SA5, marking the current parameter and the voltage parameter of the target power equipment as I 0 and U 0 respectively;
and respectively adding the current parameter and the voltage parameter of the target power equipment with the corresponding current compensation value and the voltage compensation value to obtain the corresponding display current and the corresponding display voltage, and then sending the display current and the display voltage to the display unit.
Preferably, when calculating the display current and the display voltage, determining the corresponding current compensation value and the positive and negative values of the corresponding voltage according to the sizes of I S1 and I L1 and the sizes of U S2 and U L2;
If I S1＞IL1, the corresponding current compensation value is positive;
if I S1＜IL1, the corresponding current compensation value is represented as a negative number;
if U S2＞UL2, the corresponding voltage compensation value is positive;
If U S2＜UL2, it indicates that the corresponding voltage compensation value is negative.
Preferably, the main line acquisition module, the constant voltage acquisition module and the constant current acquisition module all adopt current and voltage detection chips of the same model;
preferably, the analysis unit is further used for performing anomaly analysis on the power data obtained by the main line acquisition module, the constant voltage acquisition module and the constant current acquisition module, obtaining an anomaly signal according to an anomaly analysis result, and sending the anomaly signal to the display unit;
the display unit is also used for displaying the abnormal signals to operators, and the operators overhauls and replaces the main line acquisition module, the constant voltage acquisition module and the constant current acquisition module according to the abnormal signals.
Preferably, the abnormality analysis means of the analysis unit is as follows:
SS1, acquiring voltage parameters acquired by a plurality of constant voltage acquisition modules at constant voltage power supplies at different time nodes in a specified period, marking each voltage parameter as U xi, marking each current parameter acquired by a constant current acquisition module at a constant current power supply as I xi, wherein i=1, 2, … … n, n represents the number of time nodes in the specified period;
simultaneously obtaining rated voltage of a constant-voltage power supply and rated current of the constant-current power supply, and marking the rated voltage and the rated current as U e and I e respectively;
SS2, then comparing all U xi+β1 with U e, comparing I xi+β2 with I e, and then obtaining the number of U xi corresponding to U xi+β1＞Ue in all U xi according to the comparison result, and marking it as U 1;
Simultaneously acquiring the quantity of I xi+β2＞Ie corresponding to I xi in all I xi, and marking the quantity as u 2;
Meanwhile, when U xi+β1＞Ue and I xi+β2＞Ie are both established, the number U 3 of corresponding time nodes is obtained;
SS3, then through the formula Calculating an abnormality determination value YP in a specified period;
Wherein λ is a preset proportional influence threshold, α 1、α2 and α 3 are both preset proportional coefficient sets, and α1 ε [0, α 11]、α2∈[0,α21 ] and α3 ε [0, α 31 ];
SS3, then compares the abnormality determination value YP with a preset abnormality threshold Py:
If YP is larger than Py, the acquisition result of the acquisition unit is abnormal, and then an abnormal signal is generated;
Preferably, in step SS3, if YP is equal to or less than Py, it indicates that the acquisition result by the acquisition unit is normal, and no abnormal signal is generated.
The invention provides a data acquisition system of power equipment. Compared with the prior art, the method has the following beneficial effects:
According to the invention, after the voltage parameter acquired by the constant voltage acquisition module at the constant voltage power supply and the current parameter acquired by the constant current acquisition module at the constant current power supply are respectively compared with the rated voltage of the constant voltage power supply and the rated current of the constant current power supply, an abnormal judgment value is calculated according to the quantity ratio of the voltage parameter and the constant current power supply, and then the power data acquisition result is subjected to fault diagnosis according to the abnormal judgment value, so that the fault diagnosis accuracy of the power monitoring data is improved.
According to the invention, the constant voltage power supply and the constant current power supply are arranged, the corresponding power data is acquired by the acquisition unit, and then the corresponding power data is subjected to compensation analysis by the analysis unit, so that a corresponding compensation analysis result is obtained, and the compensation parameter of the corresponding power data is acquired by the acquisition unit in the target power equipment, so that the calibration and accurate acquisition of the power equipment data acquisition system are realized.
Drawings
FIG. 1 is a system block diagram of the present invention;
Fig. 2 is a system block diagram of the acquisition unit 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.
As an embodiment of the invention
Referring to fig. 1-2, the present invention provides a technical solution: a power equipment data acquisition system comprising:
The constant voltage power supply and the constant current power supply are respectively used for analyzing the corresponding electric power data acquired by the acquisition unit to obtain a corresponding compensation analysis result;
The acquisition unit comprises a main line acquisition module, a constant voltage acquisition module and a constant current acquisition module, and is used for respectively acquiring respective power data on target power equipment, a constant voltage power supply and a constant current power supply; the power data includes current parameters and voltage parameters;
the resistances of the constant voltage power supply and the constant current power supply output end are the same, and the resistances are regarded as approximately fixed;
the main line acquisition module, the constant voltage acquisition module and the constant current acquisition module all adopt current and voltage detection chips of the same model;
The analysis unit is used for acquiring all the electric power data acquired by the acquisition unit and carrying out compensation analysis on the electric power data;
The compensation analysis mode is as follows:
SA1, marking the actual current parameter and the actual voltage parameter obtained by the constant voltage acquisition module as I S1 and U S1 respectively;
Then, using ohm's law: i L1=US1/R, calculating the theoretical current I L1 of the constant-voltage power supply;
Then, obtaining a difference value I c between the actual current parameter and the theoretical current of the constant-voltage power supply through I c=|IS1-IL1 I;
wherein R represents resistance;
SA2, marking the actual current parameter and the actual voltage parameter obtained by the constant current acquisition module as I S2 and U S2 respectively;
Using ohm's law: u L2=IS2 is equal to R, and the theoretical voltage U L2 of the constant-current power supply is calculated;
Then obtaining a difference value U c between the actual voltage parameter and the theoretical voltage of the constant-current power supply through U c=|US2-UL2 I;
SA3, acquiring power data generated by a plurality of constant voltage power supplies and constant current power supplies at different time nodes in a specified period, sequentially calculating the difference value between the actual current parameters of the constant voltage power supplies and the theoretical current and the difference value between the actual voltage parameters of the constant current power supplies and the theoretical voltage, which are obtained by the power data at each time node, according to the modes of the step SA1 and the step SA2, and respectively recording the difference values as U ci and I ci;
Wherein i=1, 2, … … n, n represents the number of time nodes in a specified period, I represents the number of the time nodes, U ci represents the difference value between the actual current parameter and the theoretical current of the constant-voltage power supply, and I ci represents the difference value between the actual voltage parameter and the theoretical voltage of the constant-voltage power supply;
SA4, respectively calculating the difference value between the actual current parameter and the theoretical current of the constant-voltage power supply and the discrete degree between the actual voltage parameter and the theoretical voltage of the constant-voltage power supply by using a discrete degree calculation formula, removing the corresponding difference value which causes the excessive discrete degree according to a preset discrete threshold value, reserving the rest corresponding difference values which are not removed, calculating the average value of the corresponding difference values, and respectively recording the corresponding average value of the corresponding difference values as a voltage compensation value and a current compensation value, wherein the discrete degree is a common technology of a person in the field;
In this embodiment, the specific way to calculate the voltage compensation value according to the degree of dispersion is:
by the formula: Obtaining discrete values L of all the compensated air flow;
Then comparing the calculated discrete value L with L 0, if L is larger than L 0, considering that the group of discrete values L is overlarge, sequentially removing the corresponding U ci values according to the sequence from big to small of |U ci-Ucp |, and correspondingly calculating the rest discrete values L until L is smaller than or equal to L 0;
Then obtaining all U ci values which are not removed, reserving the difference value between the actual voltage parameter of the constant-current power supply which is not removed and the theoretical voltage, and calculating the average value of the difference value between the actual voltage parameter of the constant-current power supply which is not removed and the theoretical voltage to obtain a voltage compensation value;
wherein U cp represents the average value of the difference values of the actual voltage parameters and the theoretical voltage of all constant-current power supplies participating in calculation, and L 0 is a preset discrete threshold value;
SA5, marking the current parameter and the voltage parameter of the target power equipment as I 0 and U 0 respectively;
the current parameter and the voltage parameter of the target power equipment are respectively added with a corresponding current compensation value and a corresponding voltage compensation value to obtain a corresponding display current and a corresponding display voltage, and then the display current and the display voltage are sent to a display unit;
when the display current is calculated, determining the positive value and the negative value of the corresponding current compensation value according to the sizes of I S1 and I L1;
If I S1＞IL1, the corresponding current compensation value is positive;
if I S1＜IL1, the corresponding current compensation value is represented as a negative number;
Meanwhile, when the display voltage is calculated, determining the positive value and the negative value of the corresponding voltage compensation value according to the sizes of U S2 and U L2;
if U S2＞UL2, the corresponding voltage compensation value is positive;
if U S2＜UL2, the corresponding voltage compensation value is represented as a negative number;
The display unit is used for displaying the display current and the display voltage to a tester;
According to the embodiment, the constant voltage power supply and the constant current power supply are arranged, the corresponding power data is obtained by the collecting unit, the corresponding power data is subjected to compensation analysis by the analyzing unit, so that a corresponding compensation analysis result is obtained, the corresponding compensation analysis result is used as the compensation parameter of the corresponding power data obtained by the collecting unit in the target power equipment, and the calibration and accurate collection of the power equipment data collecting system are further realized.
As embodiment II of the present invention
The first embodiment is based on the first embodiment, the analysis unit is further configured to perform anomaly analysis on the power data obtained by the main line acquisition module, the constant voltage acquisition module, and the constant current acquisition module, obtain an anomaly signal according to an anomaly analysis result, and send the anomaly signal to the display unit;
the anomaly analysis method is as follows:
SS1, acquiring voltage parameters acquired by a plurality of constant voltage acquisition modules at constant voltage power supplies at different time nodes in a specified period, marking each voltage parameter as U xi, marking each current parameter acquired by a constant current acquisition module at a constant current power supply as I xi, wherein i=1, 2 and … … n represent the number of time nodes in the specified period, and I represents the number of the time nodes;
In this embodiment, the designated period of the present embodiment and the designated period of the first embodiment are the same period, and each time node thereof and the time node of the first embodiment are the same time node;
SS2, then obtaining the rated voltage of the constant voltage power supply and the rated current of the constant current power supply, and marking the rated voltage and the rated current as U e and I e respectively;
SS3, then compare all U xi+β1 to U e, compare I xi+β2 to I e;
if U xi+β1＞Ue is set, the voltage parameter is obtained;
if U xi+β1≤Ue is not set, the voltage parameter is not acquired;
if I xi+β2＞Ie is reached, the current parameter is obtained;
if I xi+β2≤Ie, not obtaining the current parameter;
Wherein beta 1 and beta 2 are corresponding preset compensation parameters;
SS4, then, the number of U xi+β1＞Ue corresponding to U xi is obtained in all U xi, and is marked as U 1;
Simultaneously acquiring the quantity of I xi+β2＞Ie corresponding to I xi in all I xi, and marking the quantity as u 2;
Meanwhile, when U xi+β1＞Ue and I xi+β2＞Ie are both established, the number U 3 of corresponding time nodes is obtained;
SS5, then through the formula Calculating an abnormality determination value YP in a specified period;
Wherein λ is a preset proportional influence threshold, α 1、α2 and α 3 are both preset proportional coefficient sets, and α1 ε [0, α 11]、α2∈[0,α21 ] and α3 ε [0, α 31 ];
SS6, then compares the abnormality determination value YP with a preset abnormality threshold Py:
if YP is larger than Py, the acquisition result of the acquisition unit is abnormal, then an abnormal signal is generated, and compensation analysis is not carried out on the electric power data acquired by the target electric power equipment through the analysis unit;
if YP is less than or equal to Py, the collecting result of the collecting unit is normal, and then the compensating analysis can be continuously carried out on the electric power data collected by the target electric power equipment through the analyzing unit;
the display unit is also used for displaying the abnormal signal to an operator, and the operator overhauls and replaces the main line acquisition module, the constant voltage acquisition module and the constant current acquisition module according to the abnormal signal.
According to the embodiment, after the voltage parameter collected by the constant voltage collecting module at the constant voltage power supply and the current parameter collected by the constant current collecting module at the constant current power supply are respectively compared with the rated voltage of the constant voltage power supply and the rated current of the constant current power supply, an abnormal judgment value is calculated according to the number ratio of the constant voltage power supply and the rated current of the constant current power supply, and then fault diagnosis is carried out on the power data collecting result according to the abnormal judgment value, so that the fault diagnosis accuracy of the power monitoring data is improved.
And all that is not described in detail in this specification is well known to those skilled in the art.
The foregoing describes one embodiment of the present invention in detail, but the disclosure is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.

Claims (1)

1. A power equipment data acquisition system, comprising:
The acquisition unit comprises a main line acquisition module, a constant voltage acquisition module and a constant current acquisition module, and is used for respectively acquiring respective power data on target power equipment, a constant voltage power supply and a constant current power supply, and then sending the power data to the analysis unit; the power data includes current parameters and voltage parameters;
the constant voltage power supply and the constant current power supply are respectively used for acquiring corresponding electric power data acquired by the acquisition unit and analyzing the corresponding electric power data through the analysis unit to obtain corresponding compensation analysis results;
the analysis unit is used for acquiring all the power data acquired by the acquisition unit, carrying out compensation analysis on the power data acquired by the target power equipment through the power data on the constant voltage power supply and the constant current power supply, obtaining the display voltage and the display current of the target power equipment according to the compensation analysis result, and then sending the display voltage and the display current to the display unit;
A display unit for displaying a display current and a display voltage;
The compensation analysis mode is as follows:
SA1, marking the actual current parameter and the actual voltage parameter obtained by the constant voltage acquisition module as I S1 and U S1 respectively;
Then, using ohm's law: i L1＝US1/R, calculating the theoretical current I L1 of the constant-voltage power supply;
Then, obtaining a difference value I c between the actual current parameter and the theoretical current of the constant-voltage power supply through I c＝|IS1-IL1 I;
wherein R represents a resistor, wherein the resistors at the output ends of the constant voltage power supply and the constant current power supply are the same, and the resistor is a fixed value;
SA2, marking the actual current parameter and the actual voltage parameter obtained by the constant current acquisition module as I S2 and U S2 respectively;
Using ohm's law: u L2＝IS2 is equal to R, and the theoretical voltage U L2 of the constant-current power supply is calculated;
then obtaining a difference value U c between the actual voltage parameter and the theoretical voltage of the constant-current power supply through U c＝|US2-UL2 I;
SA3, acquiring power data generated by a plurality of constant voltage power supplies and constant current power supplies at different time nodes in a specified period, sequentially calculating the difference value between the actual current parameters of the constant voltage power supplies and the theoretical current and the difference value between the actual voltage parameters of the constant current power supplies and the theoretical voltage, which are obtained by the power data at each time node, according to the modes of the step SA1 and the step SA2, and respectively recording the difference values as U ci and I ci;
Wherein i=1, 2, … … n, n represents the number of time nodes in a specified period, I represents the number of the time nodes, I ci represents the difference value between the actual current parameter and the theoretical current of the constant-voltage power supply, and U ci represents the difference value between the actual voltage parameter and the theoretical voltage of the constant-voltage power supply;
SA4, respectively calculating the difference value between the actual current parameter of the constant-voltage power supply and the theoretical current and the discrete degree between the actual voltage parameter of the constant-voltage power supply and the theoretical voltage by using a discrete degree calculation formula, removing the corresponding difference value which causes the excessive discrete degree according to a preset discrete threshold value, reserving the rest corresponding difference values which are not removed, calculating the average value of the corresponding difference values, and respectively recording the corresponding average value as a voltage compensation value and a current compensation value;
The discrete degree calculation formula is as follows:
Wherein L is the degree of dispersion, and U cp represents the average value of the difference values of the actual voltage parameters and the theoretical voltage of all constant-current power supplies participating in calculation;
SA5, marking the current parameter and the voltage parameter of the target power equipment as I 0 and U 0 respectively;
the current parameter and the voltage parameter of the target power equipment are respectively added with a corresponding current compensation value and a corresponding voltage compensation value to obtain a corresponding display current and a corresponding display voltage, and then the display current and the display voltage are sent to a display unit;
When the display current and the display voltage are calculated, determining a corresponding current compensation value and a positive value and a negative value of the corresponding voltage according to the sizes of I S1 and I L1 and the sizes of U S2 and U L2;
If I S1＞IL1, the corresponding current compensation value is positive;
if I S1＜IL1, the corresponding current compensation value is represented as a negative number;
if U S2＞UL2, the corresponding voltage compensation value is positive;
if U S2＜UL2, the corresponding voltage compensation value is represented as a negative number;
The analysis unit is also used for carrying out anomaly analysis on the electric power data obtained by the main line acquisition module, the constant voltage acquisition module and the constant current acquisition module, obtaining an anomaly signal according to an anomaly analysis result and sending the anomaly signal to the display unit;
The display unit is also used for displaying the abnormal signals to operators, and the operators carry out maintenance replacement treatment on the main line acquisition module, the constant voltage acquisition module and the constant current acquisition module according to the abnormal signals;
The abnormality analysis mode of the analysis unit is as follows:
SS1, acquiring voltage parameters acquired by a plurality of constant voltage acquisition modules at constant voltage power supplies at different time nodes in a specified period, marking each voltage parameter as U xi, marking each current parameter acquired by a constant current acquisition module at a constant current power supply as I xi, wherein i=1, 2, … … n, n represents the number of time nodes in the specified period;
simultaneously obtaining rated voltage of a constant-voltage power supply and rated current of the constant-current power supply, and marking the rated voltage and the rated current as U e and I e respectively;
SS2, then comparing all U xi+β1 with U e, comparing I xi+β2 with I e, and then obtaining the number of U xi corresponding to U xi+β1＞Ue in all U xi according to the comparison result, and marking it as U 1;
Simultaneously acquiring the quantity of I xi+β2＞Ie corresponding to I xi in all I xi, and marking the quantity as u 2;
Meanwhile, when U xi+β1＞Ue and I xi+β2＞Ie are both established, the number U 3 of corresponding time nodes is obtained;
Wherein, beta 1 and beta 2 are corresponding preset compensation parameters;
SS3, then through the formula Calculating an abnormality determination value YP in a specified period;
Wherein λ is a preset proportional influence threshold, α 1、α2 and α 3 are both preset proportional coefficient sets, and α 1∈[0,α11]、α2∈[0,α21 ] and α 3∈[0,α31 ];
SS3, then compares the abnormality determination value YP with a preset abnormality threshold Py:
If YP is larger than Py, the acquisition result of the acquisition unit is abnormal, and then an abnormal signal is generated;
in the step SS3, if YP is less than or equal to Py, the result of the acquisition by the acquisition unit is normal, and no abnormal signal is generated;
The main line acquisition module, the constant voltage acquisition module and the constant current acquisition module all adopt current and voltage detection chips of the same model.
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