CN114089266B - Meter calibration method and system suitable for single-phase double-loop electric energy meter - Google Patents
Meter calibration method and system suitable for single-phase double-loop electric energy meter Download PDFInfo
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- CN114089266B CN114089266B CN202210069366.9A CN202210069366A CN114089266B CN 114089266 B CN114089266 B CN 114089266B CN 202210069366 A CN202210069366 A CN 202210069366A CN 114089266 B CN114089266 B CN 114089266B
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Abstract
The embodiment of the application provides a meter calibration method and system suitable for a single-phase double-loop electric energy meter, and the method comprises the following steps: simultaneously raising the power of a live line loop and a zero line loop of the single-phase double-loop electric energy meter through a three-phase calibration device; the phase A port of the three-phase calibration device is connected to a live wire loop of the single-phase double-loop electric energy meter, and the phase B port of the three-phase electric energy meter calibration device is connected to a zero line loop of the single-phase double-loop electric energy meter; and reading ammeter parameters generated in a live line loop and a zero line loop in the power-up process, and correcting the effective values of the voltage and the current by combining standard table parameters recorded in a preset calibration standard table based on the ammeter parameters, wherein the ammeter parameters comprise a current measurement value, a voltage measurement value and a power factor measurement value. The method can finish simultaneous adjustment and calibration of the live wire loop and the zero wire loop of the electric energy meter only by one-time power-up and power-down time, saves the adjustment and calibration time and improves the meter calibration efficiency.
Description
Technical Field
The application relates to the technical field of electric energy meter calibration, in particular to a meter calibration method and system suitable for a single-phase double-loop electric energy meter.
Background
At present, a conventional meter calibration method adopted for a single-phase double-loop electric energy meter is as follows: the software controls the calibration device to raise the power of the fire and zero line loops, and when the rated voltage, current and power factor are reached, the calibration device reads the power and calibrates the power and zero line loops by taking various data recorded in a preset standard table as reference values. However, the calibration method needs to perform independent source raising on each phase loop, and the method cannot perform voltage, current and power source raising on the live line loop and the zero line loop at the same time, so that the problems of increasing the calibration time and reducing the calibration efficiency exist.
Disclosure of Invention
The purpose of the embodiment of the application is to provide a meter calibration method and system suitable for a single-phase double-loop electric energy meter, which can save calibration time and improve meter calibration efficiency.
The embodiment of the application also provides a meter calibration method suitable for the single-phase double-loop electric energy meter, which comprises the following steps:
simultaneously raising the power of a live line loop and a zero line loop of the single-phase double-loop electric energy meter by using a three-phase calibration device; the phase A port of the three-phase calibration device is connected to a live wire loop of the single-phase double-loop electric energy meter, and the phase B port of the three-phase electric energy meter calibration device is connected to a zero line loop of the single-phase double-loop electric energy meter;
and reading ammeter parameters generated in the live wire loop and the zero wire loop in the power-up process by using a three-phase calibration device, and correcting voltage and current effective values by combining standard meter parameters recorded in a preset calibration standard meter based on the ammeter parameters, wherein the ammeter parameters comprise a current measurement value, a voltage measurement value and a power factor measurement value.
In a second aspect, an embodiment of the present application further provides a meter calibration system suitable for a single-phase dual-loop electric energy meter, where the system includes a source raising module and a parameter correction module, where:
the source raising module is used for simultaneously raising the source of a live line loop and a zero line loop of the single-phase double-loop electric energy meter by using the three-phase calibration device; the phase A port of the three-phase calibration device is connected to a live wire loop of the single-phase double-loop electric energy meter, and the phase B port of the three-phase electric energy meter calibration device is connected to a zero line loop of the single-phase double-loop electric energy meter;
the parameter correction module is used for reading ammeter parameters generated in the live wire loop and the zero wire loop in the power-up process by using a three-phase calibration device, and correcting voltage and current effective values by combining standard meter parameters recorded in a preset calibration standard meter based on the ammeter parameters, wherein the ammeter parameters comprise a current measurement value, a voltage measurement value and a power factor measurement value.
In a third aspect, an embodiment of the present application further provides a readable storage medium, where the readable storage medium includes a meter calibration method program applicable to a single-phase dual-circuit electric energy meter, and when the meter calibration method program applicable to the single-phase dual-circuit electric energy meter is executed by a processor, the steps of the meter calibration method applicable to the single-phase dual-circuit electric energy meter are implemented as any one of the above.
Therefore, according to the meter calibration method, system and readable storage medium for the single-phase double-loop electric energy meter provided by the embodiment of the application, the existing source-raising mode of the three-phase calibration device is changed, the live line loop and the zero line loop in the single-phase double-loop electric energy meter are calibrated, and the calibration of the live line loop and the zero line loop can be completed only by raising the power-up and power-down time once and setting the calibration command of the electric energy meter once, so that the calibration time is saved, and the meter calibration efficiency is improved.
Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a flowchart of a calibration method for a single-phase dual-loop electric energy meter according to an embodiment of the present disclosure.
Fig. 2 is a schematic overall flow chart of a meter calibration method suitable for a single-phase double-loop electric energy meter according to an embodiment of the present application.
Fig. 3 is a schematic structural diagram of a meter calibration system suitable for a single-phase double-circuit electric energy meter according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, fig. 1 is a flowchart illustrating a calibration method for a single-phase dual-loop electric energy meter according to some embodiments of the present disclosure. The method comprises the following steps:
step S101, a three-phase calibration device is used for simultaneously raising sources of a live line loop and a zero line loop of the single-phase double-loop electric energy meter; the phase A port of the three-phase calibration device is connected to a live wire loop of the single-phase double-loop electric energy meter, and the phase B port of the three-phase electric energy meter calibration device is connected to a zero line loop of the single-phase double-loop electric energy meter.
The three-phase calibration device is specially designed for detecting the operation error and the fault of the electric network meter for the field inspection of the electric power system, and the device uses the high-precision internal mutual inductor and the clamp-type mutual inductor for sampling, so that an operator can rapidly, safely and reliably measure the error and the wiring error of the meter, and an effective basis is provided for the metering personnel of the electric power system to accurately meter and supplement the electric quantity. In order to conveniently convert ac power, power transmission is generally performed in a three-phase four-wire manner, in which three heads of three-phase power are called phase lines, and three tails of three-phase power are connected together to be called neutral lines, also called "zero lines". Three phase lines and a zero line of three-phase electricity have 220 voltages, and can generate electric shock to people, which is commonly called as a 'live wire'.
Specifically, in order to enable the live line loop and the zero line loop in the single-phase double-loop electric energy meter to be simultaneously powered up, in the current embodiment, a three-phase calibration device is used for program-controlled three-phase four-wire power up, wherein phase voltage, current, power factor and the like of a phase of the three-phase calibration device are used as reference values of the live line loop, phase voltage, current, power factor and the like of B phase of the three-phase calibration device are used as reference values of the zero line loop, the phase voltage, the current, the power factor and the like of B phase of the three-phase calibration device are connected to the live line loop through a phase port of the three-phase calibration device, and a phase port of B phase of the three-phase calibration device is connected to the zero line loop, so that the live line loop and the zero line loop can be powered up simultaneously.
In one embodiment, the single-phase double-loop electric energy meter is installed on an equipment table body of the three-phase calibration device. And, the three-phase calibration equipment still need be connected to the communication data line of single-phase double circuit electric energy meter to guarantee the effective transmission of data. The computer programs the three-phase calibration device to complete source rising, and respectively reads electric meter parameters such as current, voltage and the like of a live line loop and a zero line loop in the single-phase double-loop electric energy meter after the source rising is stable;
in the embodiment, the source raising mode of the three-phase calibration device is changed, and two loops in the electric energy meter are calibrated at the same time after the live wire loop and the zero wire loop in the source raising single-phase double-loop electric energy meter are simultaneously raised, so that the calibration efficiency is effectively improved under the condition of not repeatedly powering on and off and setting a calibration command.
And S102, reading ammeter parameters generated in the live wire loop and the zero wire loop in the power-up process by using a three-phase calibration device, and correcting effective values of voltage and current by combining standard table parameters recorded in a preset calibration standard table based on the ammeter parameters, wherein the ammeter parameters comprise a current measurement value, a voltage measurement value and a power factor measurement value.
Specifically, referring to fig. 2, in the present embodiment, a three-phase calibration device is used to calibrate the live line loop and the zero line loop of the electric energy meter based on the read electric meter parameter values. In one embodiment, a three-phase calibration device is utilized to raise a source Uset (U) based on a table bodya、Ub、Uc) I, I and Ia、Ib、Ic) And the power factor 1 is used for calculating the live wire current, the live wire voltage and the zero line current value of the electric energy meter. And after the adjustment is finished, the program-controlled three-phase calibration device finishes the power-off operation, then the communication data wire between the three-phase calibration device and the electric energy meter is disconnected, and finally the electric energy meter is detached from the three-phase calibration device, so that all adjustment works are finished.
Therefore, according to the meter calibration method suitable for the single-phase double-loop electric energy meter, the existing source raising mode of the three-phase calibration device is changed, the live wire loop and the zero line loop in the single-phase double-loop electric energy meter are calibrated at the same time, the calibration of the live wire loop and the zero line loop can be completed only by raising the power on and off once and setting the calibration command of the electric energy meter once, the calibration time is saved, and the meter calibration efficiency is improved.
In one embodiment, in step S102, the correcting, based on the electric meter parameter, the voltage and current effective values by combining with the standard table parameter recorded in the preset calibration standard table includes:
and step S1021, based on the A-phase current value recorded in the check standard table, the effective current measurement value measured by the current effective value register, the preset current conversion coefficient and the read power factor measurement value, performing correction of the live wire current value.
Specifically, the correcting of the live wire current value based on the a-phase current value recorded in the calibration standard table, the effective current measurement value measured by the current effective value register, the preset current conversion coefficient, and the read power factor measurement value includes: when determining I0And when the current value is larger than I, correcting the live wire current value by the following formula:
IAGain =((I0/I)-1)*2^15;
wherein, IAGainFor corrected live current gain correction value, I0=Ia*1/Ki，I0The current value of the live wire is not corrected; i isaThe current value of the phase A recorded in the calibration standard table is used, and I is an effective current measured value measured by a current effective value register; 1 is the power factor measurement read, KiA preset current conversion coefficient is obtained; when determining I0When the current value is less than I, the live wire current value is corrected by the following formula:
IAGain =((I0/I)-1)*2^15+2^16。
step S1022, based on the a-phase voltage value recorded in the calibration standard table, the effective voltage measurement value measured by the voltage effective value register, the preset voltage conversion coefficient, and the read power factor measurement value, the voltage value of the live wire is corrected.
Specifically, the correcting the voltage value of the live wire based on the a-phase voltage value recorded in the calibration standard table, the effective voltage measurement value measured by the voltage effective value register, the preset voltage conversion coefficient, and the read power factor measurement value includes: when determining U0And when the voltage value is larger than U, the voltage value of the live wire is corrected through the following formula:
UGain =((U0/U)-1)*2^15;
wherein, UGainFor voltage gain correction, U0=Ua*1/Kv，U0Is an uncorrected live line voltage value; u shapeaFor the A-phase voltage value, K, recorded in the calibration standard tablevA preset voltage conversion coefficient; u is an effective voltage measured value measured by a voltage effective value register; when determining U0And when the voltage value is less than U, the voltage value of the live wire is corrected by the following formula:
UGain =((U0/U)-1)*2^15+2^16。
and S1023, correcting the zero line current value based on the B-phase current value recorded in the check standard table, the effective current measured value measured by the current effective value register, a preset current conversion coefficient and the read power factor measured value.
Specifically, the correcting of the zero line current value based on the B-phase current value recorded in the calibration standard table, the effective current measurement value measured by the current effective value register, the preset current conversion coefficient, and the read power factor measurement value includes: when determining
And when the current value is larger than I, correcting the zero line current value by the following formula:
IBGain =((
/I)-1)*2^15;
wherein, IBGainFor correcting the gain of zero-line currentBy the positive value of the amount of the first,
=Ib*1/Ki，
the zero line current value is not corrected; i isbThe phase B current value recorded in the calibration standard table is obtained; when determining
And when the current value is less than I, correcting the zero line current value by the following formula:
IBGain =((
/I)-1)*2^15+2^16。
in one embodiment, after performing the step of correcting the effective value of the voltage and the current, the method further comprises:
and step S103, when the correction of the single-phase double-loop electric energy meter is determined to be completed by using the three-phase calibration device, reading the electric meter parameters again, and comparing the read electric meter parameters with the standard meter parameters recorded in the calibration standard meter to ensure the accuracy of the calibration.
Specifically, referring to fig. 2, when the parameter comparison is performed and the comparison fails, the current detected electric energy meter may be directly determined as a defective product, or when the comparison fails, the operation is returned to step S101 to perform the source raising operation again, and when the comparison fails for a plurality of times, the current detected electric energy meter is determined as a defective product. For the detected defective products, a message prompt mode may be used, for example, sending a short message, and displaying a prompt message indicating that the defective products occur on the display terminal, so as to notify the relevant management personnel to perform equipment maintenance.
And step S104, outputting first prompt information representing successful correction when the parameter comparison is determined to be successful.
Specifically, when the parameter comparison is determined to be successful, that is, the currently read parameter is consistent with or approximately equal to the standard table parameter recorded in the check standard table, the current calibration is considered to be successful, and at this time, corresponding first prompt information is output, and the calibration process is ended.
And S105, outputting second prompt information representing the failure of correction when the parameter comparison is determined to be failed, and raising the power supply of the live wire loop and the zero wire loop at the same time.
Specifically, it is determined that the parameter comparison fails, that is, when the difference between the currently read parameter and the standard table parameter recorded in the calibration standard table is large, the current calibration fails, and in order to avoid misjudgment of a defective product, the live line loop and the zero line loop are subjected to source raising again at the same time, and the parameter calibration is performed again, wherein the related difference threshold value can be flexibly adjusted according to the actual situation, and the embodiment of the present application does not limit the situation.
In the above embodiment, through the output prompt information, the relevant device management personnel can be helped to timely master the current adjustment and calibration conditions, and the device maintenance efficiency is improved.
In one embodiment, the method further comprises: when the live wire loop and the zero line loop are subjected to source increasing at the same time, recording the times of source increasing again, and outputting third prompt information representing that the electric energy meter has faults when the fact that correction fails for continuous times is determined; and the first prompt information, the second prompt information, the third prompt information and the fourth prompt information are transmitted to a preset display terminal, and the first prompt information, the second prompt information, the third prompt information and the fourth prompt information are displayed in real time through the display terminal.
Specifically, each time the source raising operation is performed again, the three-phase calibration device records the number of times of source raising again, and outputs the third prompt message when determining that the source raising operation fails for a plurality of consecutive times (for example, 3 times). When the display terminal displays the first to third prompt messages, the output prompt messages can be sequentially arranged and displayed in the screen according to the time axis and the time sequence; alternatively, in one embodiment, the display of the prompt information may be performed according to the failure priority level, for example, the prompt information with a high failure level may be displayed preferentially at the highlighted position on the screen; in another embodiment, different font colors may be set, so as to achieve an effect of distinguishing different types of prompt messages, and the information display manner is not limited in this application embodiment.
Referring to fig. 3, an embodiment of the present application further provides a meter calibration system 300 suitable for a single-phase dual-loop electric energy meter, where the system 300 includes a source raising module 301 and a parameter calibration module 302, where:
the source raising module 301 is configured to raise a source of a live line loop and a zero line loop of the single-phase double-loop electric energy meter at the same time by using the three-phase calibration device; the phase A port of the three-phase calibration device is connected to a live wire loop of the single-phase double-loop electric energy meter, and the phase B port of the three-phase electric energy meter calibration device is connected to a zero line loop of the single-phase double-loop electric energy meter.
The parameter correction module 302 is configured to read electric meter parameters generated in the live line loop and the zero line loop in the power-up process, and correct voltage and current effective values based on the electric meter parameters in combination with standard meter parameters recorded in a preset calibration standard meter, where the electric meter parameters include a current measurement value and a voltage measurement value.
In one embodiment, the parameter correction module 302 is further configured to correct the live wire current value based on the a-phase current value recorded in the calibration standard table, the effective current measurement value measured by the current effective value register, the preset current conversion coefficient, and the read power factor measurement value; correcting the voltage value of the live wire based on the A-phase voltage value recorded in the check standard table, the effective voltage measurement value measured by the voltage effective value register, the preset voltage conversion coefficient and the read power factor measurement value; and correcting the zero line current value based on the B-phase current value recorded in the check standard table, the effective current measured value measured by the current effective value register, the preset current conversion coefficient and the read power factor measured value.
In one embodiment, the parameter correction module 302 is further configured toWhen determining I0And when the current value is larger than I, correcting the live wire current value by the following formula:
IAGain =((I0/I)-1)*2^15;
wherein, IAGainFor corrected live current gain correction value, I0=Ia*1/Ki，I0The current value of the live wire is not corrected; i isaThe current value of the phase A recorded in the calibration standard table is used, and I is an effective current measured value measured by a current effective value register; 1 is the power factor measurement read, KiA preset current conversion coefficient; when determining I0When the current value is less than I, the live wire current value is corrected by the following formula:
IAGain =((I0/I)-1)*2^15+2^16。
in one embodiment, the parameter correction module 302 is further configured to determine U when U is determined0And when the voltage value is larger than U, the voltage value of the live wire is corrected through the following formula:
UGain =((U0/U)-1)*2^15;
wherein, UGainFor voltage gain correction values, U0=Ua*1/Kv，U0Is an uncorrected live line voltage value; u shapeaFor the A-phase voltage value, K, recorded in the calibration standard tablevA preset voltage conversion coefficient; u is an effective voltage measured value measured by a voltage effective value register; when determining U0And when the voltage value is less than U, the voltage value of the live wire is corrected by the following formula:
UGain =((U0/U)-1)*2^15+2^16。
in one embodiment, the parameter correction module 302 is further configured to correct the parameter when determining
And when the current value is larger than I, correcting the zero line current value by the following formula:
IBGain =((
/I)-1)*2^15;
wherein, IBGainFor the corrected gain correction value of the zero line current,
=Ib*1/Ki，
the zero line current value is not corrected; i isbThe phase B current value recorded in the calibration standard table is obtained; when determining
When the current value is less than I, the zero line current value is corrected by the following formula:
IBGain =((
/I)-1)*2^15+2^16。
in one embodiment, the system 300 further comprises an alignment module, wherein: the comparison module is used for reading the electric meter parameters again when the correction of the single-phase double-loop electric energy meter is determined to be completed by using the three-phase calibration device, and comparing the read electric meter parameters with the standard meter parameters recorded in the calibration standard meter so as to ensure the accuracy of calibration; when the parameter comparison is determined to be successful, outputting first prompt information representing successful correction; and when the parameter comparison fails, outputting second prompt information representing the failure of correction, and raising the source of the live wire loop and the zero wire loop at the same time.
In one embodiment, the system 300 further comprises a display output module, wherein: the display output module is used for recording the times of re-source increasing when the source increasing is carried out on the live wire loop and the zero line loop at the same time, and outputting third prompt information representing that the electric energy meter has faults when the correction fails for continuous times; and the first prompt information, the second prompt information, the third prompt information and the fourth prompt information are transmitted to a preset display terminal, and the first prompt information, the second prompt information, the third prompt information and the fourth prompt information are displayed in real time through the display terminal.
Therefore, the meter calibration system suitable for the single-phase double-loop electric energy meter provided by the embodiment of the application can calibrate the live wire loop and the zero line loop in the single-phase double-loop electric energy meter only by changing the existing source raising mode of the three-phase calibration device and simultaneously calibrating the live wire loop and the zero line loop in the single-phase double-loop electric energy meter, and can calibrate the live wire loop and the zero line loop only by raising the power on and off time once and setting the calibration command of the electric energy meter once, so that the calibration time is saved, and the meter calibration efficiency is improved.
The embodiment of the present application provides a storage medium, and when being executed by a processor, the computer program performs the method in any optional implementation manner of the above embodiment. The storage medium may be implemented by any type of volatile or nonvolatile storage device or combination thereof, such as a Static Random Access Memory (SRAM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), an Erasable Programmable Read-Only Memory (EPROM), a Programmable Read-Only Memory (PROM), a Read-Only Memory (ROM), a magnetic Memory, a flash Memory, a magnetic disk, or an optical disk.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
In addition, units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
Furthermore, the functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (6)
1. A meter calibration method suitable for a single-phase double-loop electric energy meter is characterized by comprising the following steps:
simultaneously raising the power of a live line loop and a zero line loop of the single-phase double-loop electric energy meter by using a three-phase calibration device; the phase A port of the three-phase calibration device is connected to a live wire loop of the single-phase double-loop electric energy meter, and the phase B port of the three-phase electric energy meter calibration device is connected to a zero line loop of the single-phase double-loop electric energy meter;
reading ammeter parameters generated in the live wire loop and the zero wire loop in the power-up process by using a three-phase calibration device, and correcting voltage and current effective values by combining standard meter parameters recorded in a preset calibration standard meter based on the ammeter parameters, wherein the ammeter parameters comprise a current measured value, a voltage measured value and a power factor measured value;
based on the ammeter parameter, combine the standard table parameter of predetermineeing the record in the calibration standard table, carry out the correction of voltage, electric current virtual value, include:
correcting the live wire current value based on the A-phase current value recorded in the check standard table, the effective current measured value measured by the current effective value register, the preset current conversion coefficient and the read power factor measured value;
correcting the voltage value of the live wire based on the A-phase voltage value recorded in the check standard table, the effective voltage measurement value measured by the voltage effective value register, the preset voltage conversion coefficient and the read power factor measurement value;
correcting the zero line current value based on the B-phase current value recorded in the check standard table, the effective current measured value measured by the current effective value register, the preset current conversion coefficient and the read power factor measured value;
the correction of the live wire current value based on the phase a current value recorded in the calibration standard table, the effective current measurement value measured by the current effective value register, the preset current conversion coefficient and the read power factor measurement value comprises the following steps:
when determining I0And when the current value is larger than I, correcting the live wire current value by the following formula:
IAGain =((I0/I)-1)*2^15;
wherein, IAGainFor corrected live current gain correction value, I0=Ia*1/Ki，I0The current value of the live wire is not corrected; i isaThe current value of the phase A recorded in the calibration standard table is used, and I is an effective current measured value measured by a current effective value register; 1 is the power factor measurement read, KiA preset current conversion coefficient is obtained;
when determining I0When the current value is less than I, the current value of the live wire is corrected by the following formula:
IAGain=((I0/I)-1)*2^15+2^16；
the correcting of the live wire voltage value based on the a-phase voltage value recorded in the calibration standard table, the effective voltage measurement value measured by the voltage effective value register, the preset voltage conversion coefficient, and the read power factor measurement value includes:
when determining U0And when the voltage value is larger than U, the voltage value of the live wire is corrected through the following formula:
UGain =((U0/U)-1)*2^15;
wherein, UGainFor voltage gain correction values, U0=Ua*1/Kv ，U0 Is an uncorrected live line voltage value; u shapeaFor the A-phase voltage value, K, recorded in the calibration standard tablevA preset voltage conversion coefficient; u is an effective voltage measured value measured by a voltage effective value register;
when determining U0When the voltage value is less than U, the voltage value is corrected by the following formula:
UGain =((U0/U)-1)*2^15+2^16；
the correction of the zero line current value based on the B-phase current value recorded in the check standard table, the effective current measurement value measured by the current effective value register, the preset current conversion coefficient and the read power factor measurement value comprises the following steps:
when determining
And when the current value is larger than I, correcting the zero line current value by the following formula:
IBGain =((
/I)-1)*2^15;
wherein, IBGainFor the corrected zero line current gain correction value,
=Ib*1/Ki ，
the zero line current value is not corrected; i isbThe phase B current value recorded in the calibration standard table is obtained;
when determining
And when the current value is less than I, correcting the zero line current value by the following formula:
IBGain =((
/I)-1)*2^15+2^16。
2. the method of claim 1, wherein after performing the step of correcting the effective value of the voltage and the current, the method further comprises:
when the correction of the single-phase double-loop electric energy meter is determined to be completed by using the three-phase calibration device, reading the parameters of the electric meter again, and comparing the read parameters of the electric meter with the parameters of the standard meter recorded in the calibration standard meter so as to ensure the accuracy of the calibration;
when the parameter comparison is determined to be successful, outputting first prompt information representing successful correction;
and when the parameter comparison fails, outputting second prompt information representing the failure of correction, and raising the source of the live wire loop and the zero wire loop at the same time.
3. The method of claim 2, further comprising:
when the live wire loop and the zero line loop are subjected to source increasing at the same time, recording the times of source increasing again, and outputting third prompt information representing that the electric energy meter has faults when the fact that correction fails for continuous times is determined; and the first prompt information, the second prompt information, the third prompt information and the fourth prompt information are transmitted to a preset display terminal, and the first prompt information, the second prompt information, the third prompt information and the fourth prompt information are displayed in real time through the display terminal.
4. A meter calibration system suitable for a single-phase double-loop electric energy meter is characterized by comprising a source raising module and a parameter correction module, wherein:
the source raising module is used for raising the source of a live line loop and a zero line loop of the single-phase double-loop electric energy meter simultaneously by utilizing the three-phase calibration device; the phase A port of the three-phase calibration device is connected to a live wire loop of the single-phase double-loop electric energy meter, and the phase B port of the three-phase electric energy meter calibration device is connected to a zero line loop of the single-phase double-loop electric energy meter;
the parameter correction module is used for reading ammeter parameters generated in the live wire loop and the zero line loop in the power-up process by using a three-phase calibration device, and correcting voltage and current effective values by combining standard meter parameters recorded in a preset calibration standard meter based on the ammeter parameters, wherein the ammeter parameters comprise a current measurement value, a voltage measurement value and a power factor measurement value;
the system further comprises: the electric energy meter calibration method comprises a memory and a processor, wherein the memory comprises a program of a meter calibration method suitable for a single-phase double-loop electric energy meter, and the program of the meter calibration method suitable for the single-phase double-loop electric energy meter realizes the following steps when being executed by the processor:
simultaneously raising the power of a live line loop and a zero line loop of the single-phase double-loop electric energy meter by using a three-phase calibration device; the phase A port of the three-phase calibration device is connected to a live wire loop of the single-phase double-loop electric energy meter, and the phase B port of the three-phase electric energy meter calibration device is connected to a zero line loop of the single-phase double-loop electric energy meter;
reading ammeter parameters generated in the live wire loop and the zero wire loop in the power-up process by using a three-phase calibration device, and correcting voltage and current effective values by combining standard meter parameters recorded in a preset calibration standard meter based on the ammeter parameters, wherein the ammeter parameters comprise a current measured value, a voltage measured value and a power factor measured value;
based on the ammeter parameter, combine the standard table parameter of predetermineeing the record in the calibration standard table, carry out the correction of voltage, electric current virtual value, include:
correcting the live wire current value based on the A-phase current value recorded in the check standard table, the effective current measured value measured by the current effective value register, the preset current conversion coefficient and the read power factor measured value;
correcting the voltage value of the live wire based on the A-phase voltage value recorded in the check standard table, the effective voltage measurement value measured by the voltage effective value register, the preset voltage conversion coefficient and the read power factor measurement value;
correcting the zero line current value based on the B-phase current value recorded in the check standard table, the effective current measured value measured by the current effective value register, the preset current conversion coefficient and the read power factor measured value;
the correction of the live wire current value based on the phase a current value recorded in the calibration standard table, the effective current measurement value measured by the current effective value register, the preset current conversion coefficient and the read power factor measurement value comprises the following steps:
when determining I0And when the current value is larger than I, correcting the live wire current value by the following formula:
IAGain =((I0/I)-1)*2^15;
wherein, IAGainFor corrected live current gain correction value, I0=Ia*1/Ki，I0The current value of the live wire is not corrected; i isaThe current value of the phase A recorded in the calibration standard table is used, and I is an effective current measured value measured by a current effective value register; 1 is the power factor measurement read, KiA preset current conversion coefficient;
when determining I0When the current value is less than I, the live wire current value is corrected by the following formula:
IAGain=((I0/I)-1)*2^15+2^16；
the correcting of the live wire voltage value based on the a-phase voltage value recorded in the calibration standard table, the effective voltage measurement value measured by the voltage effective value register, the preset voltage conversion coefficient, and the read power factor measurement value includes:
when determining U0And when the voltage value is larger than U, the voltage value of the live wire is corrected through the following formula:
UGain =((U0/U)-1)*2^15;
wherein, UGainFor voltage gain correction values, U0=Ua*1/Kv ，U0 Is an uncorrected live line voltage value; u shapeaFor the A-phase voltage value, K, recorded in the calibration standard tablevA preset voltage conversion coefficient; u is an effective voltage measured value measured by a voltage effective value register;
when determining U0When the voltage value is less than U, the voltage value is corrected by the following formula:
UGain =((U0/U)-1)*2^15+2^16；
the correction of the zero line current value based on the B-phase current value recorded in the check standard table, the effective current measurement value measured by the current effective value register, the preset current conversion coefficient and the read power factor measurement value comprises the following steps:
when determining
And when the current value is larger than I, correcting the zero line current value by the following formula:
IBGain =((
/I)-1)*2^15;
wherein, IBGainFor the corrected zero line current gain correction value,
=Ib*1/Ki ，
the current value of the neutral line is not corrected; i isbThe phase B current value recorded in the calibration standard table is obtained;
when determining
And when the current value is less than I, correcting the zero line current value by the following formula:
IBGain =((
/I)-1)*2^15+2^16。
5. the system according to claim 4, wherein the parameter correction module is further configured to correct the live wire current value based on the a-phase current value recorded in the calibration standard table, the effective current measurement value measured by the current effective value register, the preset current conversion coefficient, and the read power factor measurement value; correcting the voltage value of the live wire based on the A-phase voltage value recorded in the check standard table, the effective voltage measurement value measured by the voltage effective value register, the preset voltage conversion coefficient and the read power factor measurement value; and correcting the zero line current value based on the B-phase current value recorded in the check standard table, the effective current measured value measured by the current effective value register, the preset current conversion coefficient and the read power factor measured value.
6. A readable storage medium, characterized in that the readable storage medium includes a meter calibration method program for a single-phase dual-loop electric energy meter, and the meter calibration method program for the single-phase dual-loop electric energy meter realizes the steps of the method according to any one of claims 1 to 3 when being executed by a processor.
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