Method, device and equipment for realizing equivalent apparent power of three-phase electric energy meter

Abstract

The invention relates to the technical field of three-phase electric energy meters, and discloses an equivalent apparent power implementation method, device and equipment of a three-phase electric energy meter and a medium. Comprising the following steps: acquiring cyclic wave voltage sampling data and cyclic wave current sampling data of each phase of the three-phase electric energy meter in at least one cyclic wave; calculating the equivalent voltage of the three-phase electric energy meter according to the cyclic wave voltage sampling data; calculating the equivalent current of the three-phase electric energy meter according to the cyclic current sampling data; and calculating the equivalent apparent power of the three-phase electric energy meter based on the equivalent voltage and the equivalent current. According to the invention, the accuracy of apparent electric energy charging and line loss calculation can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of three-phase electric energy meter, and particularly relates to an equivalent apparent power implementation method, device and equipment of three-phase electric energy meter. BACKGROUND

[0002] Compared with the traditional power system, in the new power system, various asymmetric faults, three-phase imbalance of distributed power and single-phase load / power also aggravate the three-phase imbalance. The harmonic problem of the new power system also presents new characteristics, such as more widespread pollution sources, closer interactive coupling, more significant uncertainty and the like.

[0003] At present, the IEC standard does not make a clear definition of the apparent power, and both the arithmetic apparent power and the vector apparent power are commonly used. Since the electrical parameters of the power grid and the load are often in a dynamic change process, the three-phase power supply system generally exists three-phase imbalance and a large number of harmonics, which leads to inconsistent calculation results of the arithmetic apparent power and the vector apparent power. In addition, under the condition of non-sinusoidal and unbalanced working conditions and the same load, the theoretical line loss calculated by using different apparent power models is quite different. Therefore, the calculation theory of the apparent power brings problems of precision and rationality of the apparent energy billing and the line loss calculation. SUMMARY

[0004] Therefore, the present application provides an equivalent apparent power implementation method, device, equipment and medium of three-phase electric energy meter to solve the technical problem of poor accuracy of the equivalent apparent power calculation theory value of the three-phase electric energy meter.

[0005] In a first aspect, the present application provides an equivalent apparent power implementation method of three-phase electric energy meter, comprising: obtaining cycle voltage sampling data and cycle current sampling data of each phase of the three-phase electric energy meter within at least one cycle; calculating an equivalent voltage of the three-phase electric energy meter according to the cycle voltage sampling data; calculating an equivalent current of the three-phase electric energy meter according to the cycle current sampling data; and calculating the equivalent apparent power of the three-phase electric energy meter based on the equivalent voltage and the equivalent current.

[0006] The equivalent apparent power implementation method of the three-phase electric energy meter calculates the equivalent voltage and the equivalent current through the cycle voltage sampling data and the cycle current sampling data of each phase of the three-phase electric energy meter within at least one cycle, and then calculates the equivalent apparent power. Compared with the data such as voltage and current effective value which has secondary processing to calculate the equivalent apparent power, the calculation based on the directly sampled cycle voltage sampling data and cycle current sampling data is closer to the actual working condition, so that the equivalent apparent power of the three-phase electric energy meter can be more accurately and reasonably metered, and the precision of the apparent energy billing and the line loss calculation can be improved.

[0007] In an alternative embodiment, the equivalent voltage of the three-phase electric energy meter is calculated according to the cycle voltage sampling data, comprising:

[0008] The line voltage effective value of each phase of the three-phase electric energy meter is calculated according to the cycle voltage sampling data;

[0009] The equivalent voltage of the three-phase electric energy meter is calculated according to the line voltage effective value.

[0010] In this way, the line voltage effective value of each phase is directly calculated based on the cycle voltage sampling data, and then the equivalent voltage is calculated, which is simple and efficient.

[0011] In an alternative embodiment, the line voltage effective value of each phase of the three-phase electric energy meter is calculated according to the cycle voltage sampling data, comprising:

[0012] The line voltage effective value of each phase of the three-phase electric energy meter is calculated according to the cycle voltage sampling data, and the line voltage effective value calculation formula is:

[0013]

[0014] In the formula, V ab is the line voltage effective value between phase a and phase b, V bc is the line voltage effective value between phase b and phase c, V ca is the line voltage effective value between phase c and phase a, n is the number of cycle sampling points, v ai is the a-phase voltage sampling value of the i-th sampling point in a cycle, v bi is the b-phase voltage sampling value of the i-th sampling point in a cycle, and v ci is the c-phase voltage sampling value of the i-th sampling point in a cycle. The cycle voltage sampling data includes a-phase voltage sampling value, b-phase voltage sampling value and c-phase voltage sampling value.

[0015] In this way, the line voltage effective value can be calculated by the voltage sampling values of multiple sampling points in a cycle, and the calculation result is more accurate.

[0016] In an alternative embodiment, the equivalent voltage of the three-phase electric energy meter is calculated according to the line voltage effective value, comprising:

[0017] The equivalent voltage of the three-phase electric energy meter is calculated according to the line voltage effective value, and when the three-phase electric energy meter is a three-phase four-wire electric energy meter, the equivalent voltage calculation formula is:

[0018]

[0019] When the three-phase electric energy meter is a three-phase three-wire electric energy meter, the equivalent voltage calculation formula is:

[0020]

[0021] wherein V e is the equivalent voltage, V a is the a-phase voltage effective value, V b is the b-phase voltage effective value, V c is the c-phase voltage effective value.

[0022] In this way, by synthesizing the information of the three line voltage effective values, an equivalent voltage representing the voltage scale of the entire three-phase system is given, the calculation result is more reasonable, and the calculation accuracy of the subsequent equivalent apparent power is improved.

[0023] In an alternative embodiment, the equivalent current of the three-phase electric energy meter is calculated according to the cycle current sampling data, comprising:

[0024] The phase current effective value of each phase of the three-phase electric energy meter is calculated according to the cycle current sampling data;

[0025] The equivalent current of the three-phase electric energy meter is calculated according to the phase current effective value.

[0026] In this way, the phase current effective value of each phase is directly calculated based on the cycle current sampling data, and then the equivalent current is calculated, and the calculation process is simple and efficient.

[0027] In an alternative embodiment, the phase current effective value of each phase of the three-phase electric energy meter is calculated according to the cycle current sampling data, comprising:

[0028] The phase current effective value of each phase of the three-phase electric energy meter is calculated according to the cycle current sampling data, and the phase current effective value calculation formula is combined, wherein when the three-phase electric energy meter is a three-phase four-wire electric energy meter, the phase current effective value calculation formula is:

[0029]

[0030]

[0031] When the three-phase electric energy meter is a three-phase three-wire electric energy meter, the phase current effective value calculation formula is:

[0032]

[0033] wherein I a is the a-phase current effective value, I b is the b-phase current effective value, I c is the c-phase current effective value, n is the number of cycle sampling points, i ai is the a-phase voltage sampling value of the i th sampling point in a cycle, I n is the balancing current, ici is the c-phase current sample value of the i-th sampling point in a cycle, and the cycle current sample data includes the a-phase voltage sample value and the c-phase current sample value.

[0034] In this way, the phase current effective value can be calculated through the current sample values of multiple sampling points in a cycle, the calculation result is more accurate, and the three-phase phase current effective value can be obtained only by measuring the current sample values of two phases, thereby reducing the measurement difficulty.

[0035] In an optional implementation, the equivalent current of the three-phase electric energy meter is calculated according to the phase current effective value, and the equivalent current calculation formula is as follows:

[0036] The equivalent current of the three-phase electric energy meter is calculated according to the phase current effective value and the equivalent current calculation formula, wherein when the three-phase electric energy meter is a three-phase four-wire electric energy meter, the equivalent current calculation formula is as follows:

[0037]

[0038] When the three-phase electric energy meter is a three-phase three-wire electric energy meter, the equivalent current calculation formula is as follows:

[0039]

[0040] In the formula, I e is the equivalent current.

[0041] In this way, the equivalent current is calculated through the three phase current effective values, the calculation result is more reasonable, and the calculation accuracy of the subsequent equivalent apparent power is improved.

[0042] In a second aspect, the present application provides an equivalent apparent power implementation device of a three-phase electric energy meter, comprising: a sampling data acquisition module, configured to acquire cycle voltage sample data and cycle current sample data of each phase of the three-phase electric energy meter in at least one cycle; an equivalent voltage acquisition module, configured to calculate the equivalent voltage of the three-phase electric energy meter according to the cycle voltage sample data; an equivalent current acquisition module, configured to calculate the equivalent current of the three-phase electric energy meter according to the cycle current sample data; and an equivalent apparent power calculation module, configured to calculate the equivalent apparent power of the three-phase electric energy meter based on the equivalent voltage and the equivalent current.

[0043] In a third aspect, the present application provides a computer device, comprising: a memory and a processor, which are in communication connection with each other, and the memory stores computer instructions; the processor executes the computer instructions, thereby executing the equivalent apparent power implementation method of the three-phase electric energy meter according to the first aspect or any one of the corresponding embodiments thereof.

[0044] In a fourth aspect, the present application provides a computer readable storage medium, which stores computer instructions for making a computer execute the equivalent apparent power implementation method of the three-phase electric energy meter of the first aspect or any of the corresponding embodiments thereof. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the specific embodiments or prior art technical solutions of the present application, the drawings required for use in the specific embodiments or prior art description will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0046] Figure 1 is a flowchart of the equivalent apparent power implementation method of the three-phase electric energy meter of the embodiment of the present application;

[0047] Figure 2 is a structural block diagram of the equivalent apparent power implementation device of the three-phase electric energy meter of the embodiment of the present application;

[0048] Figure 3 is a hardware structure schematic diagram of the computer device of the embodiment of the present application. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0050] In a three-phase system, the currently widely used apparent power definition is vector apparent and arithmetic apparent power. In actual application, when the power system waveform is distorted and asymmetric, these two apparent power estimates cannot obtain accurate results when estimating line power loss, and the corresponding power factor cannot correctly reflect the utilization rate of the line and cannot provide a scientific basis for improving the power factor. The equivalent apparent power redefines and improves the algorithm of apparent power, making the apparent power more accurate and fair. However, the current related technology only proposes a calculation method for three-phase four-wire electric energy meters, and the calculation process is relatively cumbersome. The difference between three-phase electric energy meters and three-phase four-wire electric energy meters mainly lies in whether there is a neutral line (N line). At present, there is still a lack of accurate and reasonable acquisition method for the equivalent apparent power of three-phase three-wire and three-phase four-wire electric energy meters.

[0051] Therefore, the embodiment of the present application provides a method for realizing equivalent apparent power of a three-phase electric energy meter.

[0052] According to the embodiment of the present application, a method for realizing equivalent apparent power of a three-phase electric energy meter is provided. It should be noted that the steps shown in the flowchart of the drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0053] In the embodiment, a method for realizing equivalent apparent power of a three-phase electric energy meter is provided, which can be used in various intelligent terminals such as servers, tablet computers, mobile phones, etc. Figure 1 As shown in the figure, the flow includes the following steps:

[0054] In step S101, the cycle voltage sampling data and cycle current sampling data of each phase of the three-phase electric energy meter within at least one cycle are obtained.

[0055] The voltage and current of each phase of the three-phase electric energy meter are sampled, and the cycle sampling point number n is the total number of discrete sampling of the voltage or current signal within a complete power frequency cycle.

[0056] In an embodiment, the cycle voltage sampling data includes a-phase voltage sampling value, b-phase voltage sampling value and c-phase voltage sampling value. The cycle current sampling data includes at least two-phase voltage sampling values, for example, a-phase voltage sampling value and c-phase current sampling value.

[0057] The cycle voltage sampling data and cycle current sampling data are obtained by direct sampling.

[0058] In step S102, the equivalent voltage of the three-phase electric energy meter is calculated according to the cycle voltage sampling data.

[0059] Specifically, step S102 includes:

[0060] In step S1021, the line voltage effective value of each phase of the three-phase electric energy meter is calculated according to the cycle voltage sampling data.

[0061] The line voltage effective value calculation formula is:

[0062]

[0063]

[0064] In the formula, V ab is the line voltage effective value between a-phase and b-phase, V bc is the line voltage effective value between b-phase and c-phase, and V caV is the line voltage effective value between the c phase and the a phase, n is the number of cycle sampling points, and v ai V is the a phase voltage sampling value of the i th sampling point in a cycle, v bi V is the b phase voltage sampling value of the i th sampling point in a cycle, v ci V is the c phase voltage sampling value of the i th sampling point in a cycle, and the cycle voltage sampling data includes the a phase voltage sampling value, the b phase voltage sampling value and the c phase voltage sampling value.

[0065] In step S1022, the equivalent voltage of the three-phase electric energy meter is calculated according to the line voltage effective value.

[0066] The equivalent voltage calculation formula is as follows:

[0067]

[0068] In the formula, V e is the equivalent voltage, which is calculated from the directly sampled cycle voltage sampling data, without the need for secondary processing data, and the calculation is convenient.

[0069] Correspondingly, when the three-phase electric energy meter is a three-phase three-wire electric energy meter, it can be simplified as:

[0070]

[0071] In the formula, V e is the equivalent voltage, V a is the a phase voltage effective value, V b is the b phase voltage effective value, V c is the c phase voltage effective value. The equivalent voltage is calculated from the directly sampled cycle voltage sampling data, without the need for secondary processing data, and the calculation is convenient.

[0072] By integrating the information of the three line voltage effective values, an equivalent voltage representing the voltage scale of the entire three-phase system is given, and the calculation result is more reasonable, which helps to improve the calculation accuracy of the subsequent equivalent apparent power.

[0073] In step S103, the equivalent current of the three-phase electric energy meter is calculated according to the cycle current sampling data.

[0074] Specifically, step S103 includes:

[0075] In step S1031, the phase current effective value of each phase of the three-phase electric energy meter is calculated according to the cycle current sampling data.

[0076] In the formula, when the three-phase electric energy meter is a three-phase four-wire electric energy meter, the phase current effective value calculation formula is as follows:

[0077]

[0078]

[0079] When the three-phase electric energy meter is a three-phase three-wire electric energy meter, the phase current effective value calculation formula is:

[0080]

[0081] In the formula, I a is the a-phase current effective value, I b is the b-phase current effective value, I c is the c-phase current effective value, n is the number of cycle sampling points, i ai is the a-phase voltage sampling value of the i-th sampling point in a cycle, I n is the balancing current, i ci is the c-phase current sampling value of the i-th sampling point in a cycle, and the cycle current sampling data includes the a-phase voltage sampling value and the c-phase current sampling value.

[0082] The phase current effective value is calculated through the current sampling values of multiple sampling points in a cycle, the calculation result is more accurate, and the three-phase phase current effective value can be obtained by measuring only the current sampling values of two phases, thereby reducing the measurement difficulty.

[0083] In step S1032, the equivalent current of the three-phase electric energy meter is calculated according to the phase current effective value.

[0084] When the three-phase electric energy meter is a three-phase four-wire electric energy meter, the equivalent current calculation formula is:

[0085]

[0086] When the three-phase electric energy meter is a three-phase three-wire electric energy meter, the equivalent current calculation formula is:

[0087]

[0088] In the formula, I e is the equivalent current. The equivalent current is calculated from the directly sampled cycle current sampling data, without the need for secondary processing of the obtained data, and the calculation is convenient.

[0089] The equivalent current is calculated by comprehensively considering the three-phase current effective values, the calculation result is more reasonable, and this is helpful to improve the calculation accuracy of the subsequent equivalent apparent power.

[0090] In step S104, the equivalent apparent power of the three-phase electric energy meter is calculated based on the equivalent voltage and the equivalent current.

[0091] According to the theory of equivalent apparent power in IEEE 1459, the equivalent apparent power is the product of 3 times the equivalent voltage and the equivalent current, and the equivalent apparent power of the three-phase electric energy meter is calculated according to this, and the calculation formula is:

[0092] S e = 3 x V e x I e

[0093] In the formula, S e is the equivalent apparent power.

[0094] The equivalent apparent power implementation method of the three-phase electric energy meter of the embodiment of the application calculates the equivalent apparent power through the above steps. Compared with using voltage and current effective values and the like to calculate the equivalent apparent power, the equivalent apparent power is calculated based on directly sampled cycle voltage sampling data and cycle current sampling data, which is closer to the actual working condition, so that the equivalent apparent power of the three-phase electric energy meter can be more accurately and reasonably metered, and the precision of the apparent electric energy billing and line loss calculation can be improved.

[0095] The embodiment also provides an equivalent apparent power implementation device of a three-phase electric energy meter, which is used to implement the above embodiment and preferred embodiments, and will not be described herein again. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiment is preferably implemented in software, implementation of hardware, or a combination of software and hardware, is also possible and contemplated.

[0096] The embodiment of the application also provides an equivalent apparent power implementation device of a three-phase electric energy meter, as shown in Figure 2 , comprising:

[0097] A sampling data acquisition module 201 is configured to acquire cycle voltage sampling data and cycle current sampling data of each phase of the three-phase electric energy meter within at least one cycle;

[0098] An equivalent voltage acquisition module 202 is configured to calculate the equivalent voltage of the three-phase electric energy meter according to the cycle voltage sampling data;

[0099] An equivalent current acquisition module 203 is configured to calculate the equivalent current of the three-phase electric energy meter according to the cycle current sampling data;

[0100] An equivalent apparent power calculation module 204 is configured to calculate the equivalent apparent power of the three-phase electric energy meter based on the equivalent voltage and the equivalent current.

[0101] Further, the equivalent voltage acquisition module 202 comprises:

[0102] A line voltage effective value calculation module is configured to calculate the line voltage effective value of each phase of the three-phase electric energy meter according to the cycle voltage sampling data;

[0103] An equivalent voltage calculation module calculates the equivalent voltage of the three-phase electric energy meter according to the line voltage effective value.

[0104] Further, the line voltage effective value calculation module is further configured to calculate the line voltage effective value of each phase of the three-phase electric energy meter according to the cycle voltage sampling data and in combination with a line voltage effective value calculation formula, the line voltage effective value calculation formula being:

[0105]

[0106] wherein, V ab is the line voltage effective value between the a phase and the b phase, V bc is the line voltage effective value between the b phase and the c phase, V ca is the line voltage effective value between the c phase and the a phase, n is the number of cycle sampling points, v ai is the a phase voltage sampling value of the i th sampling point in a cycle, v bi is the b phase voltage sampling value of the i th sampling point in a cycle, v ci is the c phase voltage sampling value of the i th sampling point in a cycle, the cycle voltage sampling data including the a phase voltage sampling value, the b phase voltage sampling value and the c phase voltage sampling value.

[0107] Further, the equivalent voltage calculation module is further configured to calculate the equivalent voltage of the three-phase electric energy meter according to the line voltage effective value and in combination with an equivalent voltage calculation formula,

[0108] wherein, when the three-phase electric energy meter is a three-phase four-wire electric energy meter, the equivalent voltage calculation formula is:

[0109]

[0110] when the three-phase electric energy meter is a three-phase three-wire electric energy meter, the equivalent voltage calculation formula is:

[0111]

[0112] wherein, v e is the equivalent voltage, V a is the a phase voltage effective value, V b is the b phase voltage effective value, V c is the c phase voltage effective value.

[0113] Further, the equivalent current obtaining module 203 includes:

[0114] a phase current effective value calculation module, configured to calculate the phase current effective value of each phase of the three-phase electric energy meter according to cycle current sampling data;

[0115] an equivalent current calculation module, configured to calculate the equivalent current of the three-phase electric energy meter according to the phase current effective value.

[0116] Furthermore, the phase current RMS value calculation module is also used to calculate the RMS value of each phase of the three-phase energy meter based on the cycle current sampling data and the phase current RMS value calculation formula. Specifically, when the three-phase energy meter is a three-phase four-wire energy meter, the phase current RMS value calculation formula is:

[0117]

[0118] When the three-phase energy meter is a three-phase three-wire energy meter, the formula for calculating the effective value of the phase current is:

[0119]

[0120] In the formula, I a I is the effective value of phase a current. b I is the effective value of phase b current. c Let n be the effective value of phase c current, n be the number of sampling points per cycle, and i be the effective value of phase c current. ai Let I be the sampled value of phase a voltage at the i-th sampling point within one cycle. n To balance the current, i ci The current sampling value of phase c at the i-th sampling point within one cycle is given. The cycle current sampling data includes the voltage sampling value of phase a and the current sampling value of phase c.

[0121] Furthermore, the equivalent current calculation module is also used to calculate the equivalent current of the three-phase energy meter based on the effective value of the phase current and the equivalent current calculation formula. Specifically, when the three-phase energy meter is a three-phase four-wire energy meter, the equivalent current calculation formula is:

[0122]

[0123] When the three-phase energy meter is a three-phase three-wire energy meter, the equivalent current calculation formula is:

[0124]

[0125] In the formula, I e This is the equivalent current.

[0126] The equivalent apparent power realization device for a three-phase energy meter according to embodiments of the present invention calculates the equivalent voltage and equivalent current using cycle voltage sampling data and cycle current sampling data of each phase of the three-phase energy meter within at least one cycle, and then calculates the equivalent apparent power. Compared with using data that has undergone secondary processing, such as the effective values ​​of voltage and current, to calculate the equivalent apparent power, the calculation based on directly sampled cycle voltage and cycle current sampling data is closer to the actual operating conditions. Therefore, it can more accurately and reasonably measure the equivalent apparent power of the three-phase energy meter, thereby improving the accuracy of apparent energy billing and line loss calculation.

[0127] This invention also provides a schematic diagram of the structure of a computer device, such as... Figure 3 As shown, the computer device includes one or more processors 10, memory 20, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components communicate with each other via different buses and can be mounted on a common motherboard or otherwise installed as needed. The processors can process instructions executed within the computer device, including instructions stored in or on memory to display graphical information of a GUI on external input / output devices (such as display devices coupled to the interfaces). In some alternative implementations, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple computer devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). Figure 3 Take a processor 10 as an example.

[0128] Processor 10 may be a central processing unit, a network processor, or a combination thereof. Processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GDA), or any combination thereof.

[0129] The memory 20 stores instructions executable by at least one processor 10 to cause at least one processor 10 to perform the method shown in the above embodiments.

[0130] The memory 20 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the computer device. Furthermore, the memory 20 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some alternative embodiments, the memory 20 may optionally include memory remotely located relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0131] The memory 20 may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as flash memory, hard disk or solid-state drive; the memory 20 may also include a combination of the above types of memory.

[0132] The computer device also includes an input device 30 and an output device 40. The processor 10, memory 20, input device 30, and output device 40 can be connected via a bus or other means. Figure 3 Taking the example of a connection between China and Israel via a bus.

[0133] Input device 30 can receive input numerical or character information, and generate key signal inputs related to user settings and function control of the computer device, such as a touchscreen, keypad, mouse, trackpad, touchpad, joystick, one or more mouse buttons, trackball, joystick, etc. Output device 40 may include display devices, auxiliary lighting devices (e.g., LEDs), and haptic feedback devices (e.g., vibration motors). The aforementioned display devices include, but are not limited to, liquid crystal displays, light-emitting diodes, displays, and plasma displays. In some alternative embodiments, the display device may be a touchscreen.

[0134] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code, which, when accessed and executed by the computer, processor, or hardware, implements the methods shown in the above embodiments.

[0135] A portion of this invention can be applied as a computer program product, such as computer program instructions, which, when executed by a computer, can invoke or provide the methods and / or technical solutions according to the invention through the operation of the computer. Those skilled in the art will understand that the forms in which computer program instructions exist in a computer-readable medium include, but are not limited to, source files, executable files, installation package files, etc. Correspondingly, the ways in which computer program instructions are executed by a computer include, but are not limited to: the computer directly executing the instructions, or the computer compiling the instructions and then executing the corresponding compiled program, or the computer reading and executing the instructions, or the computer reading and installing the instructions and then executing the corresponding installed program. Here, the computer-readable medium can be any available computer-readable storage medium or communication medium accessible to a computer.

[0136] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and all such modifications and variations fall within the scope of protection.

Claims

1. A method for realizing the equivalent apparent power of a three-phase energy meter, characterized in that, include: Acquire cycle voltage sampling data and cycle current sampling data for each phase of a three-phase energy meter within at least one cycle; The equivalent voltage of the three-phase energy meter is calculated based on the frequency voltage sampling data. The equivalent current of the three-phase energy meter is calculated based on the aforementioned cyclic current sampling data; The equivalent apparent power of the three-phase energy meter is calculated based on the equivalent voltage and the equivalent current.

2. The method for realizing the equivalent apparent power of a three-phase energy meter according to claim 1, characterized in that, The calculation of the equivalent voltage of the three-phase energy meter based on the frequency voltage sampling data includes: The effective value of the line voltage of each phase of the three-phase energy meter is calculated based on the frequency voltage sampling data. The equivalent voltage of the three-phase energy meter is calculated based on the effective value of the line voltage.

3. The method for realizing the equivalent apparent power of a three-phase energy meter according to claim 2, characterized in that, The calculation of the effective line voltage values ​​of each phase of the three-phase energy meter based on the frequency voltage sampling data includes: Based on the frequency voltage sampling data, and combined with the line voltage RMS value calculation formula, the RMS value of the line voltage for each phase of the three-phase energy meter is calculated. The line voltage RMS value calculation formula is as follows: In the formula, V ab V is the effective value of the line voltage between phase a and phase b. bc V is the effective value of the line voltage between phase b and phase c. ca The effective value of the line voltage between phase c and phase a, where n is the number of frequency sampling points, and v ai Let v be the sampled value of phase a voltage at the i-th sampling point within one cycle. bi Let v be the sampled value of phase b voltage at the i-th sampling point within one cycle. ci The voltage sampling value of phase c at the i-th sampling point within one cycle is given. The cycle voltage sampling data includes the voltage sampling values ​​of phase a, phase b, and phase c.

4. The method for realizing the equivalent apparent power of a three-phase energy meter according to claim 3, characterized in that, The calculation of the equivalent voltage of the three-phase energy meter based on the effective value of the line voltage includes: The equivalent voltage of the three-phase energy meter is calculated based on the effective value of the line voltage and the equivalent voltage calculation formula. When the three-phase energy meter is a three-phase four-wire energy meter, the equivalent voltage calculation formula is as follows: When the three-phase energy meter is a three-phase three-wire energy meter, the formula for calculating the equivalent voltage is: In the formula, V e For the equivalent voltage, V a V is the effective value of phase a voltage. b V is the effective value of phase b voltage. c This is the effective value of phase c voltage.

5. The method for realizing the equivalent apparent power of a three-phase energy meter according to claim 1, characterized in that, The calculation of the equivalent current of the three-phase energy meter based on the frequency current sampling data includes: The effective value of the phase current of each phase of the three-phase energy meter is calculated based on the cyclic current sampling data. The equivalent current of the three-phase energy meter is calculated based on the effective value of the phase current.

6. The method for realizing the equivalent apparent power of a three-phase energy meter according to claim 5, characterized in that, The calculation of the effective value of the phase current of each phase of the three-phase energy meter based on the frequency current sampling data includes: Based on the frequency current sampling data, the effective value of the phase current of each phase of the three-phase energy meter is calculated using the effective value calculation formula for phase current. Specifically, when the three-phase energy meter is a three-phase four-wire energy meter, the effective value calculation formula for the phase current is: When the three-phase energy meter is a three-phase three-wire energy meter, the formula for calculating the effective value of the phase current is: In the formula, I a I is the effective value of phase a current. b I is the effective value of phase b current. c Let n be the effective value of phase c current, n be the number of sampling points per cycle, and i be the effective value of phase c current. ai Let I be the sampled value of phase a voltage at the i-th sampling point within one cycle. n To balance the current, i ci The current sampling value of phase c at the i-th sampling point within one cycle is given. The cycle current sampling data includes the voltage sampling value of phase a and the current sampling value of phase c.

7. The method for realizing the equivalent apparent power of a three-phase energy meter according to claim 6, characterized in that, The calculation of the equivalent current of the three-phase energy meter based on the effective value of the phase current includes: Based on the effective value of the phase current, the equivalent current of the three-phase energy meter is calculated using the equivalent current calculation formula. When the three-phase energy meter is a three-phase four-wire energy meter, the equivalent current calculation formula is as follows: When the three-phase energy meter is a three-phase three-wire energy meter, the equivalent current calculation formula is: In the formula, I e This is the equivalent current.

8. A device for realizing the equivalent apparent power of a three-phase energy meter, characterized in that, include: The sampling data acquisition module is used to acquire cycle voltage sampling data and cycle current sampling data of each phase of the three-phase energy meter within at least one cycle. The equivalent voltage acquisition module is used to calculate the equivalent voltage of the three-phase energy meter based on the frequency voltage sampling data. The equivalent current acquisition module is used to calculate the equivalent current of the three-phase energy meter based on the cyclic current sampling data. The equivalent apparent power calculation module is used to calculate the equivalent apparent power of the three-phase energy meter based on the equivalent voltage and the equivalent current.

9. A computer device, characterized in that, include: A memory and a processor are interconnected, the memory stores computer instructions, and the processor executes the computer instructions to perform the equivalent apparent power realization method of the three-phase energy meter according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing a computer to execute the equivalent apparent power realization method of the three-phase energy meter according to any one of claims 1 to 7.

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