CN114062752A - Mutual inductor processing method and consistency implementation method of mutual inductor and metering core - Google Patents
Mutual inductor processing method and consistency implementation method of mutual inductor and metering core Download PDFInfo
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Abstract
The embodiment of the application provides a mutual inductor processing method and a method for realizing consistency of a mutual inductor and a metering core, wherein the mutual inductor processing method comprises the following steps: carrying out factory calibration on the tested mutual inductor component and the standard metering core to obtain mutual inductor calibration parameters; adjusting the calibration parameters of the mutual inductor by using the standard calibration parameters to obtain the adjustment calibration parameters of the mutual inductor, wherein the standard calibration parameters are obtained by pre-calibrating the standard mutual inductor and the standard metering core; the transformer adjustment calibration parameters are stored in a memory unit of the transformer component under test for subsequent determination of calibration parameters when combined with a target metering core component. The method can realize field replacement of damaged parts without performing additional whole machine calibration on the combined whole equipment when the mutual inductor and/or the metering core are/is in fault at will, and can greatly reduce maintenance cost and the like.
Description
Technical Field
The application relates to the technical field of metering, in particular to a mutual inductor processing method and a consistency implementation method of a mutual inductor and a metering core.
Background
In the low-voltage electrical industry, the scheme of combining a mutual inductor and a metering core is mostly adopted for metering alternating current loads, and the metering precision can be ensured only after the mutual inductor and the metering core in the same equipment are actually calibrated. However, in the field use process, when one of the mutual inductor or the metering core has a fault, if only the damaged part is replaced and recalibration is not performed, the metering accuracy is misaligned; if the whole equipment is calibrated for the second time, the labor and material cost is generated, and the normal use of the product by a user is delayed. In addition, if the whole product is replaced, the maintenance cost is increased, and the component which is not damaged cannot be used again, thereby causing unnecessary waste.
In contrast, the solutions in the current industry mainly include that firstly, a high-consistency mutual inductor is adopted to independently calibrate a metering core; secondly, a consistency mutual inductor is heightened by using a calibration-free metering chip, and secondary calibration can not be carried out when damaged parts (the mutual inductor and/or the metering core) of the equipment are replaced by the two schemes. In any scheme, a high-consistency transformer needs to be adopted, and the cost is high. And if the calibration-free metering core is not adopted, the metering core still needs to be calibrated after being replaced.
Disclosure of Invention
In view of this, embodiments of the present application provide a mutual inductor processing method and a method for achieving consistency between a mutual inductor and a metering core, where the method can achieve field replacement of a damaged component without performing additional overall calibration on a combined overall device on the premise of low cost.
The embodiment of the application provides a mutual inductor processing method, which comprises the following steps:
calibrating the measured mutual inductor component with a standard metering core to obtain mutual inductor calibration parameters;
adjusting the calibration parameters of the mutual inductor by using standard calibration parameters to obtain the adjustment calibration parameters of the mutual inductor, wherein the standard calibration parameters are obtained by pre-calibrating the standard mutual inductor and the standard metering core;
storing the transformer adjustment calibration parameters in a memory unit of the transformer component under test for subsequent determination of device calibration parameters when combined with a target metrology core component.
In some embodiments, the standard calibration parameters include a standard current ratio difference coefficient and a standard phase difference coefficient, and the transformer calibration parameters include a first current ratio difference coefficient and a first phase difference coefficient;
the mutual inductor adjustment calibration parameters comprise a second current ratio difference coefficient and a second phase difference coefficient, and the acquisition of the mutual inductor adjustment calibration parameters comprises the following steps:
adding a preset value to the first current ratio difference coefficient, making a difference with the standard current ratio difference coefficient, and performing remainder operation on the obtained difference value to the preset value to obtain a second current ratio difference coefficient;
and adding the first phase difference coefficient to the preset value, then subtracting the first phase difference coefficient from the standard phase difference coefficient, and carrying out remainder operation on the obtained difference value to the preset value to obtain the second phase difference coefficient.
In some embodiments, the device under test and the standard metering core are combined into a calibrated device, the calibrated device is installed in a standard line of a calibration platform, and the calibration process comprises:
inputting a power supply signal with a first phase difference between voltage and current to the standard line, and calculating to obtain a first current ratio difference coefficient according to the measured actual current and the input current;
and inputting power signals with the same amplitude and a second phase difference between the voltage and the current, calculating a power error according to the output power of the platform and the measured actual power, and calculating the first phase difference coefficient according to the power error.
The embodiment of the application also provides a method for realizing the consistency of the mutual inductor and the metering core, wherein a target metering core component and the mutual inductor component obtained by adopting the processing method are combined to obtain a measuring device, and the target metering core component stores a metering core calibration parameter which is obtained by pre-calibrating with the standard mutual inductor; the method comprises the following steps:
reading the transformer adjustment calibration parameters from a storage unit of the transformer component, the transformer adjustment calibration parameters including the second current ratio difference coefficient and the second phase difference coefficient;
and determining a calibration parameter of the measuring equipment according to the metering core calibration parameter, the second current ratio difference coefficient and the second phase difference coefficient, wherein the calibration parameter is used for calibrating data measured by the measuring equipment subsequently.
In some embodiments, the metrology core calibration parameters include a metrology voltage ratio difference coefficient, a metrology current ratio difference coefficient, and a metrology phase difference coefficient, and the calibration parameters of the measurement device include a device voltage ratio difference coefficient, a device current ratio difference coefficient, and a device phase difference coefficient;
the determination of the calibration parameters of the measurement device comprises:
defining the metering voltage differential coefficient as the device voltage differential coefficient;
calculating according to the second current ratio difference coefficient and the metering current ratio difference coefficient and a first formula to obtain an equipment current ratio difference coefficient;
and calculating the equipment phase difference coefficient according to a second formula according to the second phase difference coefficient and the metering phase difference coefficient.
In some embodiments, the first formula is:
Id＝(Ic+Ii)％K；
and Id represents the equipment current ratio difference coefficient, Ic represents the metering current ratio difference coefficient, Ii represents the second current ratio difference coefficient, and K is a preset coefficient.
In some embodiments, the second formula is:
Phd＝(Phc+Phi)％K；
wherein Phd represents the equipment phase difference coefficient, Phc represents the metering phase difference coefficient, Phi represents the second phase difference coefficient, and K is a preset coefficient.
In some embodiments, the transformer assembly includes a first pair of plug terminal connections, and a current transformer, a voltage sampling terminal and the storage unit respectively connected to the first pair of plug terminals;
the first pair of receptacle terminals for use with a second pair of receptacle terminals of the target metering core component to enable signal interaction between the transformer component and the target metering core component; the current transformer is used for collecting a current signal of a tested line; the voltage sampling end is used for accessing an alternating voltage signal in the tested line.
In some embodiments, the target metering core component comprises the second mating terminal, and a current limiting resistor, a voltage sampling resistor, a current sampling resistor, a metering control unit and a power management unit respectively connected with the second mating terminal;
the power management unit is used for taking power from the tested line and converting the power into a low-voltage direct-current power supply to supply power; the current limiting resistor is used for converting the accessed alternating voltage signal into a current signal; the voltage sampling resistor and the current sampling resistor are respectively used for converting corresponding current signals into voltage signals; and the metering control unit is used for calculating according to the converted current signal and the converted voltage signal to obtain measurement data.
An embodiment of the present application further provides a separable measurement apparatus, which includes: the instrument transformer comprises an instrument transformer part and a metering core part which can be hot plugged and unplugged with the instrument transformer part, wherein the metering core part comprises a processor and a memory, the memory stores a computer program, and the processor is used for executing the computer program to implement the consistency implementation method of the instrument transformer and the metering core.
Embodiments of the present application also provide a readable storage medium, which stores a computer program, and the computer program, when executed on a processor, implements the above transformer processing method or the consistency implementation method of the transformer and the metering core.
The embodiment of the application has the following beneficial effects:
according to the mutual inductor processing method, a measured mutual inductor component designed based on the integration of a storage unit and a current mutual inductor is calibrated with a standard metering core, so that mutual inductor calibration parameters are obtained; and adjusting the transformer calibration parameters by using standard calibration parameters to obtain transformer adjustment calibration parameters, and storing the transformer adjustment calibration parameters in a tested transformer component for subsequent determination of equipment calibration parameters when the transformer adjustment calibration parameters are combined with a target metering core component, wherein the target metering core component is obtained by pre-calibrating with the standard transformer. According to the method, the mutual inductor part has a storage function, the mutual inductor part is calibrated before leaving a factory, and the calibrated data is stored in the mutual inductor part integrated with the storage unit, so that when the mutual inductor and/or the metering core have faults at will, the stored calibrated data is used for re-determining the calibration parameters of the new measurement equipment after combination, the damaged part can be replaced on site without carrying out integral calibration on the equipment, and the maintenance cost is greatly reduced.
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 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 for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 illustrates a first flowchart of a transformer processing method of an embodiment of the present application;
FIG. 2 is a schematic diagram illustrating an application of the calibration platform according to an embodiment of the present application;
FIG. 3 illustrates a second flowchart of a transformer processing method of an embodiment of the present application;
FIG. 4 illustrates a schematic diagram of a construction of a transformer assembly according to an embodiment of the present application;
FIG. 5 shows a schematic view of a configuration of a metering core member of an embodiment of the present application;
FIG. 6 illustrates a first flowchart of a method for implementing transformer to gauge core consistency in accordance with an embodiment of the present application;
fig. 7 shows a second flowchart of a method for implementing consistency between a transformer and a metering core according to an embodiment of the present application.
Description of the main element symbols:
100-transformer components; 101-a current transformer; 102-a voltage sampling terminal; 103-a storage unit; k1 — first mating terminal;
200-a metering core member; r1-current limiting resistor; r2-voltage sampling resistor; r3-current sampling resistor; 201-a metering control unit; 202-a power management unit; k2-second mating terminal.
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.
Hereinafter, the terms "including", "having", and their derivatives, which may be used in various embodiments of the present application, are intended to indicate only specific features, numbers, steps, operations, elements, components, or combinations of the foregoing, and should not be construed as first excluding the existence of, or adding to, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present application belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments.
In order to realize that the mutual inductor and the metering core are not required to be subjected to secondary calibration in the subsequent combined use with the metering core, the mutual inductor and the metering core are subjected to pluggable design through a separable pluggable terminal so as to realize field replacement; meanwhile, for the transformer component, a storage unit and a current transformer are integrally designed, so that the transformer component has a storage function; furthermore, the transformer component before shipment is calibrated once, and the obtained calibration data is stored in the storage unit of the transformer component, so that when the transformer component needs to be replaced, the calibration parameters stored in the storage unit can be directly read for directly determining the combined equipment calibration parameters and the like together with the metering standard parameters stored in advance in the metering core component. The method can greatly reduce the cost of the mutual inductor and the measuring core, is convenient for the maintenance of the damaged part especially when the damaged part is replaced on site, and can meet the precision requirement without secondary calibration.
The following describes a processing method of the transformer and a method for realizing consistency between the transformer and a metering core in combination with specific embodiments.
Example 1
Fig. 1 is a flowchart illustrating a transformer processing method according to the present application. Exemplarily, the transformer processing method is applied to a calibration platform, and the calibration platform performs the following steps:
and step S110, calibrating the tested transformer part 100 with a standard metering core to obtain transformer calibration parameters.
Exemplarily, a tested transformer part 100 may be calibrated with a standard metering core once, or may be calibrated before leaving a factory, as shown in fig. 2, specifically, the tested transformer part 100 may be connected with the standard metering core to combine to obtain a complete calibrated device, and the error of the tested transformer part 100 is tested by installing the transformer part 100 of the calibrated device in a standard line provided by a platform and applying a standard power signal of a rated voltage and current to the standard line. The standard metering core is a metering core module with linearity and stability meeting certain requirements, is generally not influenced by other external environments during measurement, and has better stability.
In one embodiment, a power signal with a first phase difference between voltage and current may be input to the standard line, and a first current specific difference coefficient of the measured transformer part 100 may be calculated according to a difference between an actual current measured by the calibrated device and an input current.
Then, a power supply signal with the same amplitude and a second phase difference between the voltage and the current is input, a power error is calculated according to the output power of the platform and the actual power measured by the calibrated device, and a first phase difference coefficient of the measured transformer component 100 is calculated according to the power error.
Wherein, for the convenience of calculation, the first phase difference can be set to zero, i.e. the voltage and the current are in phase; the second phase difference may be a voltage that leads the current by 60 degrees, etc., but other phase differences may be selected, which is not limited herein. It is understood that the transformer calibration parameters may include, but are not limited to, the first current ratio difference coefficient and the first phase difference coefficient, and may also include a first voltage ratio difference coefficient, and the like, which may be measured and calculated according to actual requirements.
Further, as shown in fig. 3, before the step S110, the transformer processing method further includes:
and step S140, calibrating the standard mutual inductor and the standard metering core to obtain standard calibration parameters.
In this embodiment, the calibration process of the standard mutual inductor and the standard metering core can be referred to the above calibration process, and the description is not repeated here. The standard calibration parameters may include, but are not limited to, a standard voltage ratio difference coefficient, a standard current ratio difference coefficient, a standard phase difference coefficient, and the like, and may be obtained according to actual requirements.
It should be understood that, the step S140 is only required to be executed once in the whole method, the calibration platform may store the obtained standard calibration parameters in the calibration upper computer of the calibration platform, and after the tested transformer component 100 is calibrated, the calibration upper computer may adjust the calibration parameters of the tested transformer component 100 by using the pre-stored standard calibration parameters, so as to obtain final calibration parameters. It should be noted that the present embodiment does not require the turns ratio of the tested transformer part 100 to be equal to that of the standard transformer, and not only the turns ratio, but also the actual test can accurately calibrate even different batches of transformer parts produced by different manufacturers.
And step S120, adjusting the calibration parameters of the mutual inductor by using the standard calibration parameters to obtain the adjustment calibration parameters of the mutual inductor.
The transformer adjustment calibration parameters may include, but are not limited to, a second current ratio difference coefficient, a second phase difference coefficient, and the like. For obtaining the second current ratio difference coefficient and the second phase difference coefficient, exemplarily, the first current ratio difference coefficient obtained in the step S110 may be added with a preset value and then subtracted from the stored standard current ratio difference coefficient, and the obtained difference is subjected to a remainder operation on the preset value to obtain the second current ratio difference coefficient; and adding a preset value to the first phase difference coefficient obtained in the step S110, and then subtracting the standard phase difference coefficient, and performing a remainder operation on the obtained difference value with respect to the preset value to obtain the second phase difference coefficient.
It will be appreciated that the preset values for the above can be set according to the number of bytes stored in particular use. For example, the voltage ratio difference coefficient, the current ratio difference coefficient, the phase difference coefficient, and the like in the embodiment are stored by using 2 bytes (16 bits), and the corresponding value range is 0 to 65535, so the preset value can be 65536. Then, the above calculation process is expressed by using the following formula:
I2＝((I1+65536)-In)％65536；
Ph2＝((Ph1+65536)-Ph n)％65536；
wherein I2 represents a second current ratio difference coefficient, I1 represents a first current ratio difference coefficient, In represents a standard current ratio difference coefficient, Ph2 represents a second phase difference coefficient, Ph1 represents a first phase difference coefficient, and Phn represents a standard phase difference coefficient.
Step S130, storing the transformer adjustment calibration parameter in the storage unit 103 of the tested transformer component 100 for subsequent determination of the calibration parameter when combined with the target measurement core.
In this embodiment, the measured transformer component 100 includes a storage unit 103, which is used for storing the obtained transformer adjustment calibration parameters and the like. Of course, the transformer section 100 also includes main elements such as a current transformer 101. For example, in one embodiment, as shown in fig. 4, the transformer part 100 includes a first pair of plug terminals K1 connected, and a current transformer 101, a voltage sampling terminal 102, a storage unit 103, and the like connected to the first pair of plug terminals K1, respectively. Wherein the first pair of receptacle terminals K1 is primarily for use with a second pair of receptacle terminals of a combined metering core component 200 to enable signal interaction between the current transformer component 100 and the metering core component 200. And the current transformer 101 is used as a main element and installed in the tested line for collecting the current signal of the tested line. And the voltage sampling terminal 102 is mainly used for accessing an alternating voltage signal in a tested line so as to supply power for the target metering core component 200 and the like.
With regard to the structure of the above-described metering core member 200, in one embodiment, as shown in fig. 5, the metering core member includes a second counter-insertion terminal K2, and a current limiting resistor R1, a voltage sampling resistor R2, a current sampling resistor R3, a metering control unit 201, a power management unit 202, and the like, which are connected to the second counter-insertion terminal K2, respectively. When the metering core component 200 is connected to the transformer component 100, the power management unit 202 is configured to take power from a line to be tested and convert the power into a low-voltage dc power to supply power to the chip in the metering core component 200. The current limiting resistor R1 is mainly used to convert the ac voltage signal received through the voltage sampling terminal 102 into a current signal, and also plays a role in limiting current. The voltage sampling resistor R2 and the current sampling resistor R3 are respectively used for converting the corresponding current signal into a voltage signal, and then input to the metering control unit 201, so that the metering control unit 201 is used for performing corresponding calculation according to the converted current signal and voltage signal.
It is understood that, in order to be combined with the metering core component 200 again without the need of a secondary standard, in the present embodiment, the metering core component 200 also needs to be calibrated in advance, and specifically, the measured metering core component 200 may be used to be calibrated with the standard transformer component 100, wherein the calibration step may also refer to the calibration process in the step S110 to obtain the corresponding transformer calibration parameter, and store the corresponding transformer calibration parameter in the memory thereof, so as to be used for determining the combined device calibration parameter together with the read mutual inductance adjustment calibration parameter in the following.
It should be noted that the tested transformer of the embodiment does not need to adopt a transformer with high consistency, and the winding yield of the transformer with high consistency is relatively low, so the production cost and the maintenance cost are high. The transformer component 100 integrated with the memory adopted in the embodiment can greatly reduce the production and maintenance cost, improve the finished product rate of transformer winding and the like. In addition, the corresponding calibration data of the mutual inductor and the metering core are stored before the mutual inductor and the metering core are delivered from a factory, so that the precision requirement can be met without secondary calibration when the mutual inductor and the metering core are used or replaced on site, and the applicable scenes are wide.
Example 2
Fig. 6 is a flowchart illustrating a method for implementing consistency between a transformer and a metering core according to the present application.
For example, when a damaged component, such as the transformer component 100 or the metering core component 200, needs to be replaced on site, the transformer component 100 obtained by the above processing method or the metering core component 200 subjected to one calibration can be used for replacement, so that a new measuring device is obtained.
Exemplarily, the method for realizing the consistency of the mutual inductor and the metering core comprises the following steps:
in step S210, a transformer adjustment calibration parameter is read from the storage unit 103 of the transformer part 100, and the transformer adjustment calibration parameter includes the second current ratio difference coefficient and the second phase difference coefficient.
After the transformer component 100 and the metering core component 200 are connected through the mating plug terminal, the main control unit in the metering core component 200 is used as the main control of the combined measuring equipment. Exemplarily, after the device is powered on and initialized, the main controller will directly access the storage unit 103 of the transformer unit 100 through the docking terminal and read out the required calibration parameters therefrom. Meanwhile, the pre-stored calibration parameters of the metering core obtained through the standard of the standard transformer are read out from the memory of the metering core calibration device.
And step S220, determining a calibration parameter of the measuring equipment according to the read metering core calibration parameter, the second current ratio difference coefficient and the second phase difference coefficient, wherein the calibration parameter is used for calibrating data measured by the measuring equipment subsequently.
The calibration parameters of the measuring equipment comprise an equipment voltage ratio difference coefficient, an equipment current ratio difference coefficient, an equipment phase difference coefficient and the like. Exemplarily, as shown in fig. 7, the determining of the calibration parameter of the measuring apparatus includes:
substep S310, defining the metering voltage ratio difference coefficient as a device voltage ratio difference coefficient;
and a substep S320, calculating the equipment current ratio difference coefficient according to the second current ratio difference coefficient and the metering current ratio difference coefficient and a first formula.
For example, the device current ratio difference coefficient may be calculated according to the following formula:
Id＝(Ic+Ii)％K；
wherein Id represents a device current ratio difference coefficient, Ic represents a metering current ratio difference coefficient, Ii represents a second current ratio difference coefficient, and K is a preset coefficient and mainly depends on the number of bytes used for storing the coefficients. For example, when 2 bytes (16 bits) are used for storage, correspondingly, the value K is 65536; if more bytes are used for storage, the value of K will be larger.
And a substep S330, calculating the equipment phase difference coefficient according to a second formula according to the second phase difference coefficient and the metering phase difference coefficient.
Similarly, the device phase difference coefficient may be calculated according to the following formula:
Phd＝(Phc+Phi)％K；
wherein Phd represents the device phase difference coefficient, Phc represents the metering phase difference coefficient, and Phi represents the second phase difference coefficient.
Thus, after obtaining calibration parameters for the device, the measurement device may be used to subsequently calibrate the measured data, for example, the calibration parameters may be added to the measured data to obtain a final measurement result.
In this embodiment, calibration parameters of the complete machine can be determined through the steps S210 to S220 only by ensuring that the transformer component and the metering core component used for combination are respectively stored with calibration parameters obtained through the above calibration (for example, calibration can be performed before factory shipment) before field use, so that consistency between the transformer and the metering core is realized.
It is to be understood that the alternatives described above in embodiment 1 are equally applicable to this embodiment, and therefore will not be described again here.
In addition, the embodiment of the application further provides a separable measuring device, which can be any measuring device supporting hot plugging of the measuring core component, such as an electric energy meter, a guide rail meter, a digital display meter and the like. Exemplarily, the separable measuring device comprises the transformer part 100 in the above embodiment 1, and the above metering core part 200 that is hot-pluggable to the transformer part 100, wherein the metering core part 200 comprises a processor and a memory, the memory stores a computer program, and the processor is configured to execute the computer program to implement the above consistency implementation method of the transformer and the metering core.
The present application also provides a readable storage medium, which stores a computer program, and the computer program, when executed on a processor, implements the transformer processing method or the consistency implementation method of the transformer and the metering core of the above embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative and, for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, each functional module or unit in each embodiment 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.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a smart phone, a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application.
Claims (10)
1. A mutual inductor processing method is characterized by comprising the following steps:
calibrating the measured mutual inductor component with a standard metering core to obtain mutual inductor calibration parameters;
adjusting the calibration parameters of the mutual inductor by using standard calibration parameters to obtain the adjustment calibration parameters of the mutual inductor, wherein the standard calibration parameters are obtained by pre-calibrating the standard mutual inductor and the standard metering core;
storing the transformer adjustment calibration parameters in a memory unit of the transformer component under test for subsequent determination of device calibration parameters when combined with a target metrology core component.
2. The transformer processing method of claim 1, wherein the standard calibration parameters comprise a standard current ratio difference coefficient and a standard phase difference coefficient, and the transformer calibration parameters comprise a first current ratio difference coefficient and a first phase difference coefficient;
the mutual inductor adjustment calibration parameters comprise a second current ratio difference coefficient and a second phase difference coefficient, and the acquisition of the mutual inductor adjustment calibration parameters comprises the following steps:
adding a preset value to the first current ratio difference coefficient, making a difference with the standard current ratio difference coefficient, and performing remainder operation on the obtained difference value to the preset value to obtain a second current ratio difference coefficient;
and adding the first phase difference coefficient to the preset value, then subtracting the first phase difference coefficient from the standard phase difference coefficient, and carrying out remainder operation on the obtained difference value to the preset value to obtain the second phase difference coefficient.
3. The transformer processing method according to claim 2, wherein the tested transformer parts and the standard metering core are combined into a calibrated device, the calibrated device is installed in a standard line of a calibration platform, and the calibration process comprises:
inputting a power supply signal with a first phase difference between voltage and current to the standard line, and calculating to obtain a first current ratio difference coefficient according to the measured actual current and the input current;
and inputting power signals with the same amplitude and a second phase difference between the voltage and the current, calculating a power error according to the output power of the platform and the measured actual power, and calculating the first phase difference coefficient according to the power error.
4. A method for realizing the consistency of a mutual inductor and a metering core, which is characterized in that a target metering core component and the mutual inductor component obtained by the method of claim 2 or 3 are combined to obtain a measuring device, and the target metering core component stores a calibration parameter of the metering core, which is obtained by pre-calibrating the standard mutual inductor; the method comprises the following steps:
reading the transformer adjustment calibration parameters from a storage unit of the transformer component, the transformer adjustment calibration parameters including the second current ratio difference coefficient and the second phase difference coefficient;
and determining a calibration parameter of the measuring equipment according to the metering core calibration parameter, the second current ratio difference coefficient and the second phase difference coefficient, wherein the calibration parameter is used for calibrating data measured by the measuring equipment subsequently.
5. The method for realizing the consistency of the mutual inductor and the metering core according to claim 4, wherein the calibration parameters of the metering core comprise a metering voltage ratio difference coefficient, a metering current ratio difference coefficient and a metering phase difference coefficient, and the calibration parameters of the measuring equipment comprise an equipment voltage ratio difference coefficient, an equipment current ratio difference coefficient and an equipment phase difference coefficient;
the determination of the calibration parameters of the measurement device comprises:
defining the metering voltage differential coefficient as the device voltage differential coefficient;
calculating according to the second current ratio difference coefficient and the metering current ratio difference coefficient and a first formula to obtain an equipment current ratio difference coefficient;
and calculating the equipment phase difference coefficient according to a second formula according to the second phase difference coefficient and the metering phase difference coefficient.
6. The method for realizing the consistency of the mutual inductor and the metering core according to claim 5, wherein the first formula is as follows:
Id＝(Ic+Ii)％K；
wherein Id represents the equipment current difference coefficient, Ic represents the metering current difference coefficient, and Ii represents the second current difference coefficient; k is a preset coefficient;
the second formula is:
Phd＝(Phc+Phi)％K；
wherein Phd represents the device phase difference coefficient, Phc represents the metering phase difference coefficient, and Phi represents the second phase difference coefficient.
7. The method for realizing the consistency of the mutual inductor and the metering core according to claim 4, wherein the mutual inductor component comprises a first pair of plug-in terminal connections, and a current mutual inductor, a voltage sampling terminal and the storage unit which are respectively connected with the first pair of plug-in terminals;
the first pair of receptacle terminals for use with a second pair of receptacle terminals of the target metering core component to enable signal interaction between the transformer component and the target metering core component; the current transformer is used for collecting a current signal of a tested line; the voltage sampling end is used for accessing an alternating voltage signal in the tested line.
8. The method for realizing the consistency of the mutual inductor and the metering core according to claim 7, wherein the target metering core component comprises the second plug-in terminal, and a current limiting resistor, a voltage sampling resistor, a current sampling resistor, a metering control unit and a power management unit which are respectively connected with the second plug-in terminal;
the power management unit is used for taking power from the tested line and converting the power into a low-voltage direct-current power supply to supply power; the current limiting resistor is used for converting the accessed alternating voltage signal into a current signal; the voltage sampling resistor and the current sampling resistor are respectively used for converting corresponding current signals into voltage signals; and the metering control unit is used for calculating according to the converted current signal and the converted voltage signal to obtain measurement data.
9. A separable measuring device, comprising: a transformer part, and a metering core part hot-pluggable with the transformer part, the metering core part comprising a processor and a memory, the memory storing a computer program for execution by the processor to implement the transformer-metering core conformance implementation method of any one of claims 4-6.
10. Readable storage medium, characterized in that it stores a computer program which, when executed on a processor, implements a method of transformer processing according to one of claims 1-3 or a method of implementation of the transformer in correspondence with a gauge core according to any one of claims 4-6.
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