WO2021098377A1

WO2021098377A1 - Alternating current quantity effective value calculation method and apparatus, computer device, and storage medium

Info

Publication number: WO2021098377A1
Application number: PCT/CN2020/117610
Authority: WO
Inventors: 袁俊波; 刘真; 秦鹏; 荣洪凯; 郭耀
Original assignee: 日立楼宇技术（广州）有限公司
Priority date: 2019-11-19
Filing date: 2020-09-25
Publication date: 2021-05-27
Also published as: CN110806502A

Abstract

An alternating current quantity effective value calculation method and apparatus, a computer device (12), and a storage medium. The method comprises: sampling the alternating current quantity in a target circuit by means of a sampling circuit at a set sampling frequency within a period of an alternating current to obtain an alternating current quantity sampling value (S110), wherein the ratio of the sampling frequency to the frequency of the alternating current is an integer; and calculating the sum of all alternating current quantity sampling values to serve as an alternating current quantity effective value (S120). The method improves the calculation efficiency of the alternating current quantity effective value, and also reduces an occupied space required for calculating the alternating current quantity effective value.

Description

Method, device, computer equipment and storage medium for calculating effective value of communication volume

Technical field

The embodiments of the present invention relate to the field of power electronic control, and in particular to a method, device, computer equipment, and storage medium for calculating the effective value of an AC quantity.

Background technique

In an alternating current system, it is necessary to obtain the input voltage and/or input current, and the output voltage and/or output current to analyze the performance of the equipment in the system.

Generally, in an alternating current system, the input voltage and/or input current, and the value of the output voltage and/or output current are actually effective values. For example, in a three-phase AC power system, the three-phase AC power system is a power system composed of three AC circuits with the same frequency, the same potential amplitude, and the phase difference by 120°. The effective value calculation method is specifically as follows: first transform the sampled value of the three-phase alternating current into a 3s/2s coordinate transformation to obtain two alternating components in a two-phase coordinate system, and then square and root the two alternating components to obtain a three-phase intersection Effective value of flow. For another example, the calculation method for the effective value of the single-phase AC quantity is: pre-store the sine and cosine table of the number of sampling times in an AC quantity cycle, and then use the DFT formula (the cumulative sum of the real and imaginary parts is squared and the root of the square) is calculated The effective value of the single-phase AC quantity is output.

The calculation of the effective value of the AC quantity mentioned above involves multiple multiplication and division and radical operation, especially when calculating the effective value of the single-phase AC quantity, a sine and cosine table needs to be pre-stored, and the calculation accuracy of the effective value depends on the numerical precision in the sine and cosine table. , Generally, the higher the accuracy of the stored value, the more the stored number, and the larger the storage space occupied. At present, the calculation method of effective value of the communication volume is large, and it takes up a large storage space, which reduces the calculation efficiency of the effective value. In order to ensure the effective value calculation efficiency, the CPU performance needs to be improved, which causes the cost of the inverter to increase.

Summary of the invention

The embodiments of the present invention provide a method, a device, a computer device and a storage medium for calculating the effective value of the communication amount, which can improve the calculation efficiency of the effective value of the communication amount and reduce the occupied space required for calculating the effective value of the communication amount.

In the first aspect, an embodiment of the present invention provides a method for calculating the effective value of the communication volume, including:

In a cycle of alternating current, sampling the alternating current in the target circuit at a set sampling frequency by the sampling circuit to obtain a sampling value of the alternating current, wherein the ratio of the sampling frequency to the frequency of the alternating current is an integer;

Calculate the sum of all the sampled values of the AC as the effective value of the AC.

In the second aspect, the embodiment of the present invention also provides a device for calculating the effective value of the communication volume, including:

The AC quantity sampling module is used to sample the AC quantity in the target circuit at a set sampling frequency by the sampling circuit within one alternating current cycle to obtain the AC quantity sampled value, wherein the sampling frequency is the same as the frequency of the alternating current The ratio of is an integer;

The effective value calculation module of the AC is used to calculate the sum of all the sampled values of the AC as the effective value of the AC.

In the third aspect, embodiments of the present invention also provide a computer device, including a memory, a processor, and a computer program stored in the memory and running on the processor. The processor executes the program when the program is executed. The calculation method of the effective value of the communication amount described in any of the examples.

In a fourth aspect, an embodiment of the present invention also provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the effective value of the communication amount is calculated as described in any of the embodiments of the present invention. method.

In the embodiment of the present invention, by sampling the AC quantity of the target circuit in one AC cycle, multiple AC quantity sampled values are obtained and accumulated to obtain the AC quantity effective value, and the effective value calculation is converted into a large number of addition calculations, which effectively reduces The number of radicals and multiplication and division operations solves the problem of low efficiency in the effective value calculation method of the sine-cosine table that requires multiple multiplication and division and radical operations in the prior art, as well as the sine-cosine table that occupies a large amount of storage space, and improves the calculation of the effective value. Efficiency, and reduce the effective value calculation cost.

Description of the drawings

Fig. 1 is a flowchart of a method for calculating the effective value of the communication quantity in the first embodiment of the present invention;

Fig. 2a is a flowchart of a method for calculating the effective value of the communication quantity in the second embodiment of the present invention;

Fig. 2b is a flowchart of a method for calculating the effective value of the communication quantity in the second embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a device for calculating the effective value of an AC quantity in the third embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a computer device in the fourth embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for ease of description, the drawings only show a part of the structure related to the present invention instead of all of the structure.

Example one

FIG. 1 is a flowchart of a method for calculating the effective value of an AC quantity in Embodiment 1 of the present invention. This embodiment can be applied to the case of calculating the effective value of an AC quantity in a circuit. The method can be provided by the embodiment of the present invention. The effective value calculation device is implemented, which can be implemented in software and/or hardware, and can generally be integrated into computer equipment. As shown in Figure 1, the method of this embodiment specifically includes:

S110: In an alternating current cycle, sample the alternating current in the target circuit at a set sampling frequency through the sampling circuit to obtain an alternating current sampling value, where the ratio of the sampling frequency to the frequency of the alternating current is an integer.

Specifically, alternating current is a current whose current direction changes periodically with time. The frequency of alternating current may refer to the number of times the direction of the current changes periodically within a unit time. The sampling circuit is used to periodically sample the target circuit. The sampling frequency is used to determine the sampling frequency of the sampling circuit. The target circuit is a circuit to be sampled, and the power supply of the target circuit is an AC power supply. The AC quantity is usually voltage or current. The sampled value of the AC quantity may refer to the value of the AC quantity in the target circuit at the current moment.

It should be noted that the current and voltage in the circuit are both analog, and it is necessary to convert the analog to digital, that is, perform analog to digital (A/D) conversion. The AC sampled value is actually a digital value, that is to say, the sampling circuit includes an A/D converter or the target circuit includes an A/D converter.

Generally, the sampling frequency is greater than the frequency of alternating current. It is understandable that if the sampling frequency is less than the frequency of the alternating current, the sampling result cannot be obtained; if the sampling frequency is equal to the frequency of the alternating current, there is only one sampling result, and the accuracy of the sampling is difficult to evaluate. Correspondingly, the number of samplings is equal to the ratio of the sampling frequency domain to the frequency of the alternating current. In order to ensure the accuracy of sampling, the number of samplings is usually an integer, and the number of samplings is greater than or equal to 2. Correspondingly, in a cycle of alternating current, the number of sampling values of alternating current obtained by sampling is greater than or equal to 2.

S120: Calculate the sum of all the sampled values of the AC as the effective value of the AC.

Accumulate the sum of the sampled values of the AC quantity as the effective value of the AC quantity.

In fact, alternating current and direct current respectively pass through resistors with the same resistance. If the two currents generate the same amount of heat in the same time, the value of the direct current at this time is called the effective value of the alternating current.

It should be noted that the effective value of the alternating current includes the effective value of the current of the alternating current and/or the effective value of the voltage of the alternating current.

A change in the direction of alternating current will cause the current and voltage to be in the opposite direction, that is, the values of current and voltage are negative. When calculating the cumulative sum, the actual calculation is the sum of absolute values.

Optionally, the calculating the sum of all the sampled values of the AC includes: calculating the sum of the absolute values of the sampled values of each of the ACs.

By calculating the absolute value of the sampled value of the AC quantity, it is possible to eliminate the situation where the value is negative and the sum is not accurate, and the effective value of the AC quantity can be accurately obtained.

Optionally, the calculating the sum of all the sampling values of the AC includes: performing error correction on each of the sampling values of the AC; and calculating the sum of all the corrected sampling values of the AC.

Usually, there is noise interference in the target circuit, and error correction can be performed on the AC sampled value to reduce the interference in the target circuit and improve the accuracy of the AC sampled value.

By correcting the error of the AC sampled value, and using the corrected AC sampled value for sum calculation, the error of the AC sampled value can be reduced, the accuracy of the AC sampled value can be improved, and the accuracy of the effective value of the AC can be improved.

Optionally, the performing error correction on the sampled value of the AC amount includes: sampling the target circuit under a passive condition at the sampling frequency by the sampling circuit to obtain an offset value of the AC amount; The difference between the AC amount sampling value and the AC amount offset value is used as the corrected AC amount sampling value.

Among them, the passive condition is used to determine when the target circuit has no power supply. The AC offset value is used as the interference value of the target circuit. In fact, the AC offset value refers to the interference current in the target circuit when there is no power supply.

The difference between the AC sampled value and the AC offset value may refer to the corrected AC sampled value. The corrected AC sampling value is the corrected AC sampling value minus the error.

By obtaining the AC offset value, and subtracting the AC offset value from the AC sampling value, the error interference in the AC sampling value is eliminated, and the accuracy of the AC sampling value is improved.

Optionally, the calculating the sum of all the sampled values of the alternating current as the effective value of the alternating current includes: calculating the product of the amplification factor of the amplifying circuit connected to the target circuit and the sum of the sampled values of all the alternating currents to obtain the alternating current Valid value.

The amplifying circuit is used to amplify or reduce the current and/or voltage in the target circuit. Among them, the amplifying circuit may belong to a sampling circuit, that is, the sampling circuit includes an amplifying circuit. Or the amplifying circuit is outside the sampling circuit range of the sampling circuit. The amplification factor is used to amplify or reduce the current and/or voltage in the target circuit. The effective value of the AC obtained by the product of the amplification factor and the sum of the sampled values of all the ACs is actually the effective value of the amplified AC or the effective value of the reduced AC.

It is understandable that usually components require a smaller voltage for power supply, and the voltage in the target circuit needs to be reduced to avoid excessive voltage causing breakdown of the components and damage to the components. Therefore, the voltage and/or current in the target circuit needs to be reduced accordingly through the amplification circuit.

Through the amplification factor of the amplifying circuit, the effective value of the AC is enlarged or reduced to further improve the accuracy of the effective value of the AC.

Optionally, the calculation of the sum of all sampled values of the AC quantity as the effective value of the AC quantity includes: when the power supply is a single-phase AC power supply, the calculated effective value of the AC quantity is valid as the target AC quantity of the single-phase power supply Value; when the power supply is a three-phase AC power source, if it is determined that the three-phase AC power source satisfies the balance condition, the calculated effective value of the AC value is used as the target AC value of the three-phase power source, where the AC amount Including line voltage and/or phase current.

It is understandable that in the single-phase AC power supply, there is only one power supply, and the calculated effective value of the AC is the effective value of the target AC. In a three-phase AC power supply, there are three power supplies. Only when the three power supplies are balanced, there is no circulating current inside the power supply. At this time, the calculated effective value of the AC between any two-phase circuits is the target AC effective. value. It is understandable that, when the three-phase AC power supply is in an unbalanced state, the change of the current direction is not stable and does not change periodically. At this time, the accuracy of the effective value of the AC quantity that is used and calculated is poor.

By distinguishing the types of alternating current, and determining the effective value of the target alternating current according to the type of alternating current, the effective value of the alternating current of different types of alternating current can be accurately determined, and the accuracy of the effective value of the alternating current can be improved.

Optionally, the determining that the three-phase AC power source satisfies the balance condition includes: calculating at least two line effective voltage values and phase current effective values; if the at least two line voltage effective values and phase current effective values are used, determining The difference between the ratio of the effective value of the line voltage between each path and the ratio of the effective value of the matched phase current is less than the set ratio threshold, then it is determined that the three-phase AC power supply satisfies the balance condition.

The effective value of the line voltage and the effective value of the phase current are both the effective value of the alternating current, which can be calculated through the foregoing steps. The set ratio threshold is used to determine whether the line voltage ratio and the phase current ratio of at least two circuits are the same or similar. The balance condition is used to judge whether the voltage and current in the three circuits of the three-phase AC power supply are balanced.

Specifically, if the ratio of the line voltages of the two circuits is the same or similar to the ratio of the phase currents of the two circuits, it indicates that there is no circulating current inside the three-phase AC power supply, and the three-phase AC power supply is balanced at this time.

Determine whether the three-phase AC power supply is balanced by determining whether the ratio of the line voltage of at least two circuits is the same or similar to the ratio of the phase currents of the at least two circuits. When the three-phase AC power supply is balanced, the effective value of the AC can be regarded as the three-phase AC The effective value of the target AC quantity of the power supply, so as to accurately determine the effective value of the target AC quantity of the three-phase AC power supply.

Example two

Fig. 2a is a flowchart of a method for calculating the effective value of the communication amount in the second embodiment of the present invention. This embodiment is optimized on the basis of the foregoing embodiment. The method of this embodiment specifically includes:

S210: In an alternating current cycle, sample the alternating current in the target circuit at a set sampling frequency through the sampling circuit to obtain an alternating current sampling value, where the ratio of the sampling frequency to the frequency of the alternating current is an integer.

Specifically, the target circuit includes an inverter.

In a specific example, the sampling frequency is f _c , the frequency of alternating current is f ₀ , and the number of sampling times n is _{the ratio of f c} divided by f ₀ , where n is greater than or equal to 2. Exemplarily, the AC sampling values obtained by sampling by the sampling circuit are ADC1, ADC2...ADCn.

S220, sampling the target circuit under a passive condition by the sampling circuit at the sampling frequency to obtain an AC offset value.

The AC offset value obtained by sampling by the sampling circuit is ADCOFFSET.

S230: Use the difference between the AC amount sample value and the AC amount offset value as a corrected AC amount sample value.

The corrected AC sampling values are: ADC1-ADCOFFSET, ADC2-ADCOFFSET...ADCn-ADCOFFSET; that is: adc1, adc2...adcn.

S240: Calculate the product of the amplification factor of the amplifying circuit connected to the target circuit and the sum of the absolute values of all the corrected alternating current sample values as the effective value of the alternating current.

The sum of the absolute values of all corrected AC sampling values is

Among them, the amplification factor is A, and the effective value of the AC quantity is RMS=A×Sum.

S250: When the power supply is a single-phase AC power, the calculated effective value of the AC is used as the target effective value of the single-phase power.

S260: When the power supply is a three-phase AC power supply, if it is determined that the three-phase AC power supply satisfies the balance condition, use the calculated effective value of the alternating current as the target effective value of the three-phase power supply. Including line voltage and/or phase current.

Through the foregoing steps, the line voltages RSM _U1 and RSM _U2 of the two channels, and the phase currents RSM _I1 and RSM _I2 of the two channels are respectively calculated. When RSM _U1 /RSM _U2 and RSM _I1 /RSM _{I2 are} less than the set ratio threshold, RSM _U1 or RSM _U2 is the effective value of the three-phase AC line voltage, and RSM _I1 or RSM _I2 is the effective value of the three-phase AC phase current.

In a specific example, as shown in FIG. 2b, the method for calculating the effective value of the communication volume of this embodiment may specifically:

S201, the cycle starts.

Among them, the cycle refers to a cycle of sampling operations within a cycle of alternating current.

S202: Acquire a sample value of the exchange amount.

S203: Determine whether a periodic sampling operation of alternating current is completed, if yes, execute S204; otherwise, execute S202.

S204: Calculate the difference between each AC amount sample value and the AC amount offset value to obtain the corrected AC amount sample value.

Among them, the AC offset value is obtained by pre-sampling.

S205: Calculate the sum of the absolute values of all the corrected AC quantity sampled values.

S206: Calculate the product of the sum of absolute values and the amplification factor to obtain the effective value of the communication volume.

S207: The calculation of the effective value of the communication volume ends.

The embodiment of the present invention obtains the effective value of the communication amount through summation calculation, simplifies the calculation amount of the effective value of the communication amount, effectively reduces the calculation time of the CPU that calculates the effective value of the communication amount, reduces the storage space occupied by the effective value of the communication amount, and improves the calculation efficiency , Reduce calculation cost.

Example three

Fig. 3 is a schematic diagram of a device for calculating the effective value of an AC quantity in the third embodiment of the present invention. The third embodiment is a corresponding device for realizing the method for calculating the effective value of the communication quantity provided in the above embodiment of the present invention. The device can be implemented in software and/or hardware, and generally can be integrated into computer equipment.

Correspondingly, the device of this embodiment may include:

The AC quantity sampling module 310 is used to sample the AC quantity in the target circuit at a set sampling frequency through the sampling circuit within one alternating current cycle to obtain the AC quantity sampled value, wherein the sampling frequency is the same as that of the alternating current. The frequency ratio is an integer;

The effective value calculation module 320 of the AC is used to calculate the sum of all the sampled values of the AC as the effective value of the AC.

Further, the AC quantity effective value calculation module 320 includes: an error correction unit configured to perform error correction on each of the AC quantity sampled values; and calculate the sum of all the corrected AC quantity sampled values.

Further, the error correction unit includes: a passive sampling subunit, configured to sample the target circuit under passive conditions at the sampling frequency through the sampling circuit to obtain an AC offset value; The difference between the AC amount sampling value and the AC amount offset value is used as the corrected AC amount sampling value.

Further, the effective value calculation module 320 of the communication amount includes: an absolute value summation unit for calculating the sum of the absolute values of the sampled values of the communication amount.

Further, the device for calculating the effective value of the AC value further includes: an amplifying operation module for calculating the product of the amplification factor of the amplifying circuit connected to the target circuit and the sum of all the sampled values of the AC value to obtain the effective value of the AC value .

Further, the AC quantity effective value calculation module 320 includes: a power source judgment unit configured to use the calculated effective value of the AC quantity as the target AC quantity effective value of the single-phase power supply when the power supply is a single-phase AC power source; When the power supply is a three-phase AC power source, if it is determined that the three-phase AC power source satisfies the balance condition, the calculated effective value of the AC power is used as the target effective value of the AC power of the three-phase power source, where the AC power includes the line Voltage and/or phase current.

Further, the power source judgment unit includes: a three-phase AC power supply effective value calculation subunit, configured to calculate at least two line voltage effective values and phase current effective values; if according to the at least two line voltage effective values and phase currents Effective value, determining that the difference between the ratio of the effective value of the line voltage between each circuit and the ratio of the effective value of the matched phase current is less than the set ratio threshold, then it is determined that the three-phase AC power supply meets the balance condition.

The foregoing communication amount effective value calculation device can execute the communication amount effective value calculation method provided by the embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the executed communication amount effective value calculation method.

Example four

FIG. 4 is a schematic structural diagram of a computer device according to Embodiment 4 of the present invention. Figure 4 shows a block diagram of an exemplary computer device 12 suitable for implementing embodiments of the present invention. The computer device 12 shown in FIG. 4 is only an example, and should not bring any limitation to the function and application scope of the embodiment of the present invention.

As shown in FIG. 4, the computer device 12 is represented in the form of a general-purpose computing device. The components of the computer device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 connecting different system components (including the system memory 28 and the processing unit 16). The computer device 12 may be a device connected to a bus.

The bus 18 represents one or more of several types of bus structures, including a memory bus or a memory controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any bus structure among multiple bus structures. For example, these architectures include but are not limited to Industry Standard Architecture (ISA) bus, Micro Channel Architecture (MCA) bus, enhanced ISA bus, Video Electronics Standards Association (Video Electronics Standards) Association, VESA) local bus and Peripheral Component Interconnect (PCI) bus.

The computer device 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by the computer device 12, including volatile and non-volatile media, removable and non-removable media.

The system memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and/or cache memory 32. The computer device 12 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. For example only, the storage system 34 may be used to read and write to non-removable, non-volatile magnetic media (not shown in Figure 4, and is commonly referred to as a "hard drive"). Although not shown in FIG. 4, a disk drive for reading and writing to a removable non-volatile disk (such as a "floppy disk") and a removable non-volatile optical disk (such as a compact disk read-only memory (Compact Disk)) can be provided. Disc Read-Only Memory, CD-ROM), Digital Video Disc-Read Only Memory (DVD-ROM) or other optical media) read and write optical disc drives. In these cases, each drive can be connected to the bus 18 through one or more data media interfaces. The system memory 28 may include at least one program product, the program product having a set (for example, at least one) program modules configured to perform the functions of the various embodiments of the present invention.

A program/utility tool 40 having a set of (at least one) program module 42 can be stored in, for example, the system memory 28. Such program module 42 includes, but is not limited to, an operating system, one or more application programs, and others. Program modules and program data, each of these examples or some combination may include the realization of a network environment. The program module 42 generally executes the functions and/or methods in the described embodiments of the present invention.

The computer device 12 may also communicate with one or more external devices 14 (such as keyboards, pointing devices, displays 24, etc.), and may also communicate with one or more devices that enable users to interact with the computer device 12, and/or communicate with Any device (such as a network card, modem, etc.) that enables the computer device 12 to communicate with one or more other computing devices. This communication can be performed through an input/output (Input/Output, I/O) interface 22. In addition, the computer device 12 may also communicate with one or more networks (for example, Local Area Network (LAN), Wide Area Network, WAN) through the network adapter 20. As shown in the figure, the network adapter 20 communicates with one or more networks through the bus 18. Communication with other modules of the computer device 12. It should be understood that although not shown in Figure 4, other hardware and/or software modules can be used in conjunction with the computer device 12, including but not limited to: microcode, device drivers, redundant processing units, external Disk drive arrays, (Redundant Arrays of Expensive Disks, RAID) systems, tape drives, data backup storage systems, etc.

The processing unit 16 executes various functional applications and data processing by running programs stored in the system memory 28, for example, to implement a method for calculating the effective value of the communication amount provided by any embodiment of the present invention.

Example five

The fifth embodiment of the present invention provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the method for calculating the effective value of the communication amount as provided in all the embodiments of the present application is implemented:

That is, when the program is executed by the processor, it is realized: in a cycle of alternating current, the alternating current in the target circuit is sampled by the sampling circuit at a set sampling frequency to obtain the sampling value of the alternating current, wherein the sampling frequency is equal to The ratio of the frequency of the alternating current is an integer; the sum of all the sampling values of the alternating current is calculated as the effective value of the alternating current.

The computer storage medium of the embodiment of the present invention may adopt any combination of one or more computer-readable media. The computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or a combination of any of the above. More specific examples of computer-readable storage media (non-exhaustive list) include: electrical connections with one or more wires, portable computer disks, hard disks, RAM, Read Only Memory (ROM), erasable Erasable Programmable Read Only Memory (EPROM), flash memory, optical fiber, portable CD-ROM, optical storage device, magnetic storage device, or any suitable combination of the above. In this document, the computer-readable storage medium can be any tangible medium that contains or stores a program, and the program can be used by or in combination with an instruction execution system, apparatus, or device.

The computer-readable signal medium may include a data signal propagated in baseband or as a part of a carrier wave, and computer-readable program code is carried therein. This propagated data signal can take many forms, including, but not limited to, electromagnetic signals, optical signals, or any suitable combination of the foregoing. The computer-readable signal medium may also be any computer-readable medium other than the computer-readable storage medium. The computer-readable medium may send, propagate, or transmit the program for use by or in combination with the instruction execution system, apparatus, or device .

The program code contained on the computer-readable medium can be transmitted by any suitable medium, including, but not limited to, wireless, wire, optical cable, radio frequency (Radio Frequency, RF), etc., or any suitable combination of the above.

The computer program code used to perform the operations of the present invention can be written in one or more programming languages or a combination thereof. The programming languages include object-oriented programming languages—such as Java, Smalltalk, C++, and also conventional Procedural programming language-such as "C" language or similar programming language. The program code can be executed entirely on the user's computer, partly on the user's computer, executed as an independent software package, partly on the user's computer and partly executed on a remote computer, or entirely executed on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network including LAN or WAN, or may be connected to an external computer (for example, using an Internet service provider to connect through the Internet).

Note that the above are only the preferred embodiments of the present invention and the applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments and substitutions can be made to those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention. The scope of is determined by the scope of the appended claims.

Claims

A method for calculating the effective value of the communication quantity, which is characterized in that it includes:

In a cycle of alternating current, sampling the alternating current in the target circuit at a set sampling frequency by the sampling circuit to obtain a sampling value of the alternating current, wherein the ratio of the sampling frequency to the frequency of the alternating current is an integer;

Calculate the sum of all the sampled values of the AC as the effective value of the AC.
The method according to claim 1, wherein the calculating the sum of all the sampled values of the communication volume comprises:

Perform error correction on each of the sampled values of the exchange amount;

Calculate the sum of all the corrected AC sampling values.
The method according to claim 2, wherein the performing error correction on the sampled value of the AC quantity comprises:

Sampling the target circuit under passive conditions by the sampling circuit at the sampling frequency to obtain an AC offset value;

The difference between the AC amount sample value and the AC amount offset value is used as the corrected AC amount sample value.
The method according to claim 1, wherein the calculating the sum of all the sampled values of the communication volume comprises:

Calculate the sum of the absolute values of the sampled values of each of the AC quantities.
The method according to claim 1, wherein the calculating the sum of all the sampled values of the AC as the effective value of the AC comprises:

Calculate the product of the amplification factor of the amplifying circuit connected to the target circuit and the sum of all the sampled values of the alternating current to obtain the effective value of the alternating current.
The method according to claim 1, wherein the calculating the sum of all the sampled values of the AC as the effective value of the AC comprises:

When the power supply is a single-phase AC power supply, the calculated effective value of the AC is used as the target effective value of the single-phase power supply;

When the power supply is a three-phase AC power source, if it is determined that the three-phase AC power source satisfies the balance condition, the calculated effective value of the AC power is used as the target effective value of the AC power of the three-phase power source, where the AC power includes the line Voltage and/or phase current.
The method according to claim 6, wherein the determining that the three-phase AC power source satisfies a balance condition comprises:

Calculate the effective value of voltage and phase current of at least two lines respectively;

If, according to the at least two line voltage effective values and phase current effective values, it is determined that the difference between the ratio of the effective value of the line voltage and the effective value of the matched phase current between the paths is less than the set ratio threshold, then it is determined that the The three-phase AC power supply satisfies the balance condition.
A device for calculating the effective value of a communication quantity, which is characterized in that it comprises:

The AC quantity sampling module is used to sample the AC quantity in the target circuit at a set sampling frequency by the sampling circuit within one alternating current cycle to obtain the AC quantity sampled value, wherein the sampling frequency is the same as the frequency of the alternating current The ratio of is an integer;

The effective value calculation module of the AC is used to calculate the sum of all the sampled values of the AC as the effective value of the AC.
A computer device, comprising a memory, a processor, and a computer program stored on the memory and running on the processor, wherein the processor executes the program as described in any one of claims 1-7 The calculation method of the effective value of the communication amount mentioned above.
A computer-readable storage medium having a computer program stored thereon, wherein the program is executed by a processor to implement the method for calculating the effective value of the communication quantity according to any one of claims 1-7.