阅读说明：本技术 一种三相四线电能表的电能计量方法、电能计量装置 (Electric energy metering method and electric energy metering device of three-phase four-wire electric energy meter ) 是由 李秋实 易文 苗书立 于 2020-12-15 设计创作，主要内容包括：本申请属于电力计量技术领域,提供了一种应用于三相四线电能表的电能计量方法、电能计量装置、终端设备以及计算机可读存储介质,通过获取所述三相四线电能表的电压向量信息和电流向量信息,并根据所述电压向量信息和所述电流向量信息生成矢量图数据,然后获取负载信息,并根据所述矢量图数据和所述负载信息确定三相四线电能表的接线方式,根据所述三相四线电能表的接线方式生成电能数据,可实现三相四线电能表任意接线方式下,均能正确进行电能计量,并且支持任意电网应用场景下均能输出正确的电能脉冲。(The utility model belongs to the technical field of the electric power measurement, a be applied to electric energy metering method, electric energy metering device, terminal equipment and the readable storage medium of computer of three-phase four-wire electric energy meter are provided, through acquireing voltage vector information and the current vector information of three-phase four-wire electric energy meter, and according to voltage vector information with current vector information generates vector diagram data, then acquires load information, and according to vector diagram data with load information confirms the mode of connection of three-phase four-wire electric energy meter, according to the mode of connection of three-phase four-wire electric energy meter generates electric energy data, can realize under the arbitrary mode of connection of three-phase four-wire electric energy meter, the homoenergetic correctly carries out the electric energy measurement to support homoenergetic output correct electric energy pulse under the arbitrary electric wire netting applied scene.)

1. An electric energy metering method applied to a three-phase four-wire electric energy meter is characterized by comprising the following steps:

acquiring voltage vector information and current vector information of the three-phase four-wire electric energy meter;

generating vector diagram data according to the voltage vector information and the current vector information;

acquiring load information, and determining a wiring mode of the three-phase four-wire electric energy meter according to the vector diagram data and the load information;

and generating electric energy data according to the wiring mode of the three-phase four-wire electric energy meter.

2. The method of power metering of claim 1 wherein said generating vector map data from said voltage vector information and said current vector information comprises:

obtaining a vector angle of voltage and a vector angle of current;

and determining a vector diagram corresponding to the wiring mode of the three-phase four-wire electric energy meter according to the vector angle of the voltage and the vector angle of the current.

3. The method of claim 1 wherein said obtaining load information and determining a three-phase four-wire power meter wiring based on said vector graphics data and said load information comprises:

determining 6 wiring modes at most according to the vector diagram data;

and acquiring load information, and screening out the wiring modes of the three-phase four-wire electric energy meter from the maximum 6 wiring modes according to the load information.

4. The method of claim 3 wherein said determining a maximum of 6 wiring patterns from said vector graphics data comprises:

and classifying 1152 vector diagrams of wiring types of the three-phase four-wire electric energy meter to obtain 64 unique vector diagrams, wherein each unique vector diagram corresponds to 6 wiring modes.

5. The method of claim 1, wherein the generating power data based on the wiring of the three-phase four-wire power meter comprises:

adjusting the phase sequence inside the three-phase four-wire electric energy meter according to the wiring mode of the three-phase four-wire electric energy meter;

and calculating the electric energy data by adopting a preset electric quantity calculation formula according to the adjusted phase sequence.

6. The electric energy metering method of claim 5, further comprising:

and calculating the compensation electric quantity according to the electric quantity calculated by the adjusted phase sequence and the current electric quantity of the three-phase four-wire electric energy meter.

7. The utility model provides an electric energy metering device, is applied to three-phase four-wire electric energy meter, its characterized in that includes:

the wiring detection module is used for acquiring voltage vector information and current vector information of the three-phase four-wire electric energy meter and generating vector diagram data according to the voltage vector information and the current vector information;

the power correction module is used for acquiring load information and determining a wiring mode of the three-phase four-wire electric energy meter according to the vector diagram data and the load information;

and the electric energy calculating module is used for generating electric energy data according to the wiring mode of the three-phase four-wire electric energy meter.

8. The power metering device of claim 7, wherein the power calculating module is further configured to calculate a compensation power according to the adjusted power calculated by the phase sequence and the current power of the three-phase four-wire power meter.

9. A terminal device, characterized in that the terminal device comprises a memory, a processor and a computer program stored in the memory and operable on the terminal device, the processor implementing the steps of the electric energy metering method according to any one of claims 1 to 6 when executing the computer program.

10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method for metering electric energy according to any one of claims 1 to 6.

Technical Field

The application belongs to the technical field of electric power metering, and particularly relates to an electric energy metering method, an electric energy metering device, terminal equipment and a computer readable storage medium of a three-phase four-wire electric energy meter.

Background

The three-phase four-wire electric energy meter has a large number of applications in a power grid, however, wiring errors are easy to occur due to complex wiring; once the occurrence happens, economic disputes can be generated between the mobile terminal and the user, and the marketing workload is increased. At present, the fault compensation electric quantity of a line is calculated, and generally, a worker conducts derivation calculation step by step according to a formula. However, the formula steps are complicated, the proportion of people who can be skillfully master the metering calculation is small, and in order to ensure the accuracy of the calculation, the calculation is often required for many times, the workload of workers is increased, the efficiency is low, and the error rate is high. The mode of derivation through the formula is difficult to obtain the approval of customers, the correctness of the customer cannot be verified, and disputes are easy to generate in the actual work.

Although the existing fault electric quantity compensation method and system propose a determination method of a three-phase four-wire wrong wiring mode and a compensation mode of electric quantity, the following defects exist:

(1) it is assumed that the inductive load operates in the (0, 60 °) interval and the capacitive load operates in the (300, 360 °) interval. The actual power grid environment is complex, and when the electric meter operates in a tie line environment, namely when the tide changes, an error occurs when the method is used for supplementing the electric energy.

(2) When the ammeter is in wrong wiring, even if the wrong wiring is detected, the pulse output of the ammeter is still wrong, the accuracy of the compensation cannot be visually judged, and the accuracy and the legality of the electric energy compensation cannot be checked according to the verification standard of the three-phase four-wire electric energy meter.

(3) Calculating the correct power by power factor angle is complicated and the approximation method used will cause errors.

Disclosure of Invention

The application aims to provide an electric energy metering method, an electric energy metering device, terminal equipment and a computer readable storage medium applied to a three-phase four-wire electric energy meter, which can realize that the electric energy can be correctly metered in any wiring mode of the electric energy meter and correct electric energy pulse can be output in any power grid application scene.

The embodiment of the application provides an electric energy metering method applied to a three-phase four-wire electric energy meter in a first aspect, which comprises the following steps:

acquiring voltage vector information and current vector information of the three-phase four-wire electric energy meter;

generating vector diagram data according to the voltage vector information and the current vector information;

acquiring load information, and determining a wiring mode of the three-phase four-wire electric energy meter according to the vector diagram data and the load information;

and generating electric energy data according to the wiring mode of the three-phase four-wire electric energy meter.

Optionally, the generating vector diagram data according to the voltage vector information and the current vector information includes:

obtaining a vector angle of voltage and a vector angle of current;

and determining a vector diagram corresponding to the wiring mode of the three-phase four-wire electric energy meter according to the vector angle of the voltage and the vector angle of the current.

Optionally, the obtaining load information and determining a connection mode of the three-phase four-wire electric energy meter according to the vector diagram data and the load information includes:

determining 6 wiring modes at most according to the vector diagram data;

and acquiring load information, and screening out the wiring modes of the three-phase four-wire electric energy meter from the maximum 6 wiring modes according to the load information.

Optionally, the determining at most 6 wiring modes according to the vector diagram data includes:

and classifying 1152 vector diagrams of wiring types of the three-phase four-wire electric energy meter to obtain 64 unique vector diagrams, wherein each unique vector diagram corresponds to 6 wiring modes.

Optionally, the generating of the electric energy data according to the connection mode of the three-phase four-wire electric energy meter includes:

adjusting the phase sequence inside the three-phase four-wire electric energy meter according to the wiring mode of the three-phase four-wire electric energy meter;

and calculating the electric energy data by adopting a preset electric quantity calculation formula according to the adjusted phase sequence.

Optionally, the electric energy metering method further includes:

and calculating the compensation electric quantity according to the electric quantity calculated by the adjusted phase sequence and the current electric quantity of the three-phase four-wire electric energy meter.

A second aspect of the embodiments of the present application further provides an electric energy metering device, including:

the wiring detection module is used for acquiring voltage vector information and current vector information of the three-phase four-wire electric energy meter and generating vector diagram data according to the voltage vector information and the current vector information;

the power correction module is used for acquiring load information and determining a wiring mode of the three-phase four-wire electric energy meter according to the vector diagram data and the load information;

and the electric energy calculating module is used for generating electric energy data according to the wiring mode of the three-phase four-wire electric energy meter.

Optionally, the electric energy calculation module is further configured to calculate a compensation electric quantity according to the electric quantity calculated by the adjusted phase sequence and the current electric quantity of the three-phase four-wire electric energy meter.

The third aspect of the embodiments of the present application further provides a terminal device, where the terminal device includes a memory, a processor, and a computer program stored in the memory and executable on the terminal device, and the processor, when executing the computer program, implements the steps of the electric energy metering method according to any one of the above.

The fourth aspect of the present embodiment also provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the computer program implements the steps of the electric energy metering method according to any one of the above.

The embodiment of the application provides an electric energy metering method, electric energy metering device, terminal equipment and computer readable storage medium for three-phase four-wire electric energy meter, through acquireing voltage vector information and the current vector information of three-phase four-wire electric energy meter, and according to voltage vector information with current vector information generation vector diagram data, then acquire load information, and according to vector diagram data with load information confirms the mode of connection of three-phase four-wire electric energy meter, according to the mode of connection of three-phase four-wire electric energy meter generates electric energy data, can realize under the arbitrary mode of connection of ammeter, the homoenergetic correctly carries out the electric energy measurement to support homoenergetic output correct electric energy pulse under the arbitrary electric wire netting application scene.

Drawings

Fig. 1 is a schematic flow chart of an electric energy metering method according to an embodiment of the present application;

fig. 2 is a schematic wiring diagram of a three-phase four-wire electric energy meter provided by an embodiment of the present application;

fig. 3 is a voltage vector diagram of a three-phase four-wire power meter according to an embodiment of the present application;

4a-4d are current vector diagrams of a three-phase four-meter power supply according to an embodiment of the present application;

FIG. 5 is a schematic diagram of the voltage channels u1u2u3u4 connected to UaUnUbUc and the current channels i1i2i3 connected to-Ia/+ Ic/+ Ib respectively according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of an electric energy metering device provided by an embodiment of the present application;

fig. 7 is a schematic diagram of a terminal device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

The embodiment of the present application provides, in a first aspect, an electric energy metering method applied to a three-phase four-wire electric energy meter, including steps S10 to S40.

Step S10: and acquiring voltage vector information and current vector information of the three-phase four-wire electric energy meter.

In this embodiment, the voltage and the current of the four power lines accessed by the three-phase four-wire electric energy meter are detected by the wiring detection device, so as to obtain corresponding voltage vector information and current vector information.

In the present embodiment, fig. 2 is a wiring diagram of a three-phase four-wire electric energy metering device, and referring to fig. 2, there are three normal wiring types of a three-phase four-wire electric energy meter, namely, a wiring type (a): the voltage is connected with UaUbUcUn, and the current is connected with + Ia + Ib + Ic; connection type (b): the voltage is connected with UbUcUaUn, and the current is connected with + Ib + Ic + Ia; connection type (c): the voltage is connected with UcUaUbUn, and the current is connected with + Ic + Ia + Ib; the other connection modes are all wrong connection modes, and the three connection modes (connection mode (a), connection mode (b) and connection mode (c)) comprise connection modes in 1152 in total, and are shown in table 1.

Table 1:

step S20: and generating vector diagram data according to the voltage vector information and the current vector information.

In this embodiment, regardless of the phase relationship between current and voltage, there are 2 vector relationships in the voltage connection method: positive voltage phase sequence and negative voltage phase sequence; considering whether the voltage line is connected to the zero line, the total 4 vector relations in the voltage wiring mode are as follows: the zero line is normally connected, the voltage channel 1 is connected with the zero line, the voltage channel 2 is connected with the zero line, and the voltage channel 3 is connected with the zero line; there are 8 vector relationships in the current wiring scheme: the current positive phase sequence, the current negative phase sequence, the current polarity is normal, the current reverse polarity of the channel 1, the current reverse polarity of the channel 2 and the current reverse polarity of the channel 3 are adopted; therefore, the voltage connection mode and the current connection mode can be combined into 2 × 4 × 8 — 64 vector diagrams, as shown in table 2.

Table 2:

in the embodiment, all vector diagrams in the three-phase four-wire electric energy meter are divided into 64 types, each 1 type of vector diagram corresponds to 6 types of wiring modes, and the classification method aims to cover a full wiring mode and a full power factor application scene.

In one embodiment, in step S20, generating vector map data according to the voltage vector information and the current vector information includes: obtaining a vector angle of voltage and a vector angle of current; and determining a vector diagram corresponding to the wiring mode of the three-phase four-wire electric energy meter according to the vector angle of the voltage and the vector angle of the current.

In this embodiment, a voltage vector angle and a current vector angle of the three-wire four-wire electric energy meter are obtained, a voltage included angle between voltage vectors and a current included angle between current vectors are determined, and a vector diagram of a current wiring mode is determined according to a preset voltage vector determination mode table and a current vector determination mode table based on the voltage included angle and the current included angle.

In one embodiment, fig. 3 is a vector diagram of a voltage connection mode, fig. 4 is a vector diagram of a current connection mode, and referring to fig. 3 and fig. 4, in this embodiment, there are 24 connection modes between the voltages Ua/Ub/Uc/Un, but the voltage vector diagrams are only 8, as follows:

(1) voltage positive phase sequence and normal zero line wiring; referring to fig. 3(a), the electric meter channel u1u2u3u4 is respectively connected to the meter station UnUbUcUa, the voltage is in positive phase sequence, the voltage line of the channel 1 is connected to the zero line, the vector included angle of u1 is 0 degrees, the vector included angle of u2 and u1 is-30 degrees, and the vector included angle of u3 and u1 is 30 degrees.

(2) The voltage positive phase sequence and the voltage line of the channel 1 are connected to a zero line; referring to fig. 3(c), the electric meter channel u1u2u3u4 is respectively connected to the meter station UnUbUcUa, the voltage is in positive phase sequence, the voltage line of the channel 1 is connected to the zero line, the vector included angle of u1 is 0 degrees, the vector included angle of u2 and u1 is-30 degrees, and the vector included angle of u3 and u1 is 30 degrees.

(3) The voltage positive phase sequence and the voltage line of the channel 2 are connected to the zero line; referring to fig. 3(e), the electric meter channel u1u2u3u4 is respectively connected to the meter station uaunnucub, the voltage is in positive phase sequence, the voltage line of the channel 2 is connected to the zero line, the vector angle of u1 is 0 °, the vector angle of u2 and u1 is-30 °, and the vector angle of u3 and u1 is-60 °.

(4) The voltage positive phase sequence and the voltage line of the channel 3 are connected to a zero line; referring to fig. 3(g), the electric meter channel u1u2u3u4 is respectively connected to the meter station UaUbUnUc, the voltage is in positive phase sequence, the voltage line of the channel 3 is connected to the zero line, the vector angle of u1 is 0 °, the vector angle of u2 and u1 is 60 °, and the vector angle of u3 and u1 is 30 °.

(5) The voltage is in reverse phase sequence, and the zero line is normally connected; referring to fig. 3(b), the electric meter channels u1u2u3u4 are respectively connected to the meter stations UaUcUbUn, the voltage is in reverse phase sequence, the vector angle of u1 is 0 °, the vector angle of u2 and u1 is-120 °, and the vector angle of u3 and u1 is 120 °.

(6) The voltage reverse phase sequence and the voltage line of the channel 1 are connected to the zero line; referring to fig. 3(d), the electric meter channel u1u2u3u4 is respectively connected with the meter station UnUcUbUa, the voltage is in reverse phase sequence, the voltage line of the channel 1 is connected with the zero line, the vector included angle of u1 is 0 degree, the vector included angle of u2 and u1 is 30 degrees, and the vector included angle of u3 and u1 is-30 degrees.

(7) The voltage reverse phase sequence and the voltage line of the channel 2 are connected to the zero line; referring to fig. 3(f), the electric meter channel u1u2u3u4 is respectively connected with the meter station uaucnub, the voltage is in reverse phase sequence, the voltage line of the channel 2 is connected with the zero line, the vector included angle of u1 is 0 degrees, the vector included angle of u2 and u1 is-60 degrees, and the vector included angle of u3 and u1 is-30 degrees.

(8) The voltage reverse phase sequence and the channel 3 voltage line are connected to the zero line; referring to fig. 3(h), the electric meter channel u1u2u3u4 is respectively connected with the meter station UaUnUbUc, the voltage is in reverse phase sequence, the voltage line of the channel 3 is connected with the zero line, the vector included angle of u1 is 0 degree, the vector included angle of u2 and u1 is 30 degrees, and the vector included angle of u3 and u1 is 60 degrees.

Table 3 shows a voltage vector determination method table.

Table 3:

table 4 shows a current vector determination method table, and it can be seen from table 4 that the phase sequence of the current can be determined by the included angle between the current channels 1, 2, and 3, that is, the current is in a positive phase sequence or a negative phase sequence. At this time, only the category of the current polarity can be preliminarily determined by the included angle between the currents, and the category is 8 in total.

Table 4:

step S30: and acquiring load information, and determining the wiring mode of the three-phase four-wire electric energy meter according to the vector diagram data and the load information.

In one embodiment, the step S30 of obtaining load information and determining the wiring manner of the three-phase four-wire power meter according to the vector diagram data and the load information includes: determining 6 wiring modes at most according to the vector diagram data; and acquiring load information, and screening out the wiring modes of the three-phase four-wire electric energy meter from the maximum 6 wiring modes according to the load information.

In one embodiment, the determining a maximum of 6 wiring modes according to the vector graphics data comprises: and classifying 1152 vector diagrams of wiring types of the three-phase four-wire electric energy meter to obtain 64 unique vector diagrams, wherein each unique vector diagram corresponds to 6 wiring modes.

In the embodiment, vector diagrams of 1152 wiring types possibly existing in all three-phase four-wire lines are classified, and finally, the vector diagrams are reduced to 64 unique vector diagrams, and each vector diagram corresponds to 6 wiring modes.

In one embodiment, after the initial determination of the angle between currents and the angle between voltages, a vector diagram may be determined. For each vector diagram type, the possible wiring modes are only 6 types at most, and each type corresponds to 3 wiring modes; and then, the wiring mode can be further reduced to 1 type of wiring mode according to the load power factor given by the field.

In the present embodiment, the connection modes of the three-phase four-wire electric energy meter have six possible connection modes, and the difference from the three-phase three-wire electric energy meter is that the three-phase three-wire corresponds to 6 connection modes per 1 vector diagram, and the three-phase four-wire corresponds to 18 connection modes, wherein every 3 groups of connection mode vector diagrams are identical, and one vector diagram can be considered to correspond to 6 connection modes.

For example, the following three wiring modes, the vector diagrams are identical, and can be regarded as a type of wiring mode, and all the wiring modes are correct wiring.

The electric voltage is A/B/C/N, and the current is IA +/IB +/IC +;

the voltage is connected with B/C/A/N, and the current is connected with IB +/IC +/IA +;

the voltage is connected with C/A/B/N, and the current is connected with IC +/IA +/IB +.

Step S40: and generating electric energy data according to the wiring mode of the three-phase four-wire electric energy meter.

In this embodiment, the connection mode may be further determined according to the input load information, and the electric energy data may be generated according to the connection mode of the three-phase four-wire electric energy meter.

In one embodiment, as shown in fig. 5, the voltage channels u1u2u3u4 are respectively connected to UaUnUbUc, the current channels i1i2i3 are respectively connected to-Ia/+ Ic/+ Ib, and the power factor PF is 1.0, and the three-phase voltage is symmetrical.

In the present embodiment, the measurement voltage of the voltage channel 1(i.e. the) With respect to correct wiring voltage(i.e. the) The included angle of the angle is 30 degrees;

measurement voltage of the voltage channel 2(i.e. the) With respect to correct wiring voltage(i.e. the) The included angle of the angle is 60 degrees;

measurement voltage of the voltage channel 3(i.e. the) With respect to correct wiring voltage(i.e. the) The included angle of the angle is 90 degrees;

measuring current of current channel 1(i.e. the) With respect to correct wiring voltage(i.e. the) The included angle of the angle is 180 degrees;

measuring current of current channel 2(i.e. the) Relative toCorrect connection voltage(i.e. the) The included angle of the angle is 240 degrees;

measuring current of current channel 3(i.e. the) With respect to correct wiring voltage(i.e. the) The included angle of the angle is 120 degrees;

in this embodiment, since the power factor PF is 1.0, the included angle between the current and the voltage under the correct wiring is obtained

Thus, the measured current-voltage angleIncluded angle with current and voltage under correct wiringThe relationship of (1) is:

the effective values of the corrected correct voltage and current are as follows:

u2’＝u2；

i1’＝i1；

i2’＝i3；

i3’＝i2；

the corrected active power calculation formula is:

and the derivation formulas of other wiring modes are analogized.

In one embodiment, table 5 shows 6 wiring manners corresponding to the vector diagram, for example, assuming that the load is known to be inductive, the power flow is positive, and it has been determined that the current-voltage vector diagram is "positive voltage phase sequence, normal zero line wiring, positive current phase sequence, and normal current polarity", then the possible range θ 1 of each wiring manner is as follows: e [0 °, 90 °), if the currently measured θ 1 is 50 °, the possible connection manner is only possible to be r, and thus the actual connection manner of the current three-phase four-wire electric energy meter can be determined.

Table 5:

in the embodiment, 6 sets of power data are saved at most, and 6 sets of power pulses can be output simultaneously, and the 6 sets of pulses can be used for verification and authentication of any wired three-phase four-wire power meter. During actual application, only one set of electric energy data is identified to be effective according to load information provided on site, and correct electric energy pulse can be output according to the effective electric energy data. The actual power of the current load, and the frequency of the pulses, can be calculated as a basis for verifying that the power correction is correct.

In one embodiment, the generating of the power data according to the wiring manner of the three-phase four-wire power meter includes: adjusting the phase sequence inside the three-phase four-wire electric energy meter according to the wiring mode of the three-phase four-wire electric energy meter; and calculating the electric energy data by adopting a preset electric quantity calculation formula according to the adjusted phase sequence.

In one embodiment, the electric energy metering method further includes: and calculating the compensation electric quantity according to the electric quantity calculated by the adjusted phase sequence and the current electric quantity of the three-phase four-wire electric energy meter.

In the embodiment, various load characteristics are considered by the three-phase four-wire electric energy meter in a traversing mode, the compensation electric energy under all the load characteristics is measured in real time, and the precision verification can be carried out on any wiring measurement under various load characteristics in a laboratory verification stage; under the actual application condition, the user provides load characteristic information, and the ammeter can further judge the wiring mode according to the load information to obtain a unique correct wiring mode and further obtain unique correct metering electric energy. For any type of compensation electric energy, the electric energy pulse can be output in real time, and the precision of the compensation electric energy can be conveniently verified and authenticated.

Fig. 6 is a schematic structural diagram of an electric energy metering device according to an embodiment of the present application, and referring to fig. 6, an electric energy metering device 40 in the embodiment includes:

the wiring detection module 41 is configured to obtain voltage vector information and current vector information of the three-phase four-wire electric energy meter, and generate vector diagram data according to the voltage vector information and the current vector information;

the power correction module 42 is used for acquiring load information and determining a wiring mode of the three-phase four-wire electric energy meter according to the vector diagram data and the load information;

and the electric energy calculating module 43 is used for generating electric energy data according to the wiring mode of the three-phase four-wire electric energy meter.

In this embodiment, after acquiring voltage and current vector information, the wiring detection module 41 acquires voltage vector information and current vector information of the three-phase four-wire electric energy meter in any wiring, and generates vector diagram data according to the voltage vector information and the current vector information; after the wiring detection module 41 determines the vector diagram, the possible wiring modes are only 6 at most, and the power correction module 42 determines the wiring mode of the electric energy meter according to the vector diagram data and the load information, that is, further screens the wiring mode according to the load information provided by the user, that is, the load power factor angle range. The power calculation module 43 outputs at least one set of power data according to the power correction module 42.

In one embodiment, the electric energy calculating module 43 is further configured to calculate a compensation electric energy according to the adjusted electric energy calculated by the phase sequence and the current electric energy of the three-phase four-wire electric energy meter.

Fig. 7 is a block diagram of a terminal device according to an embodiment of the present application. As shown in fig. 7, the terminal device 50 of this embodiment includes: a processor 51, a memory 52 and a computer program 53 stored in said memory 52 and executable on said processor 51, such as a program of an electric energy metering method. The processor 51 implements the steps of the above-mentioned embodiments of the electric energy metering method, such as steps S10-S40 in fig. 1, when executing the computer program 53. Alternatively, when the processor 51 executes the computer program 53, the functions of the units in the embodiment corresponding to fig. 5, for example, the functions of the modules 41 to 43 shown in fig. 6, are implemented, for which reference is specifically made to the relevant description in the embodiment corresponding to fig. 6, and details are not repeated here.

Illustratively, the computer program 53 may be divided into one or more units, which are stored in the memory 52 and executed by the processor 51 to accomplish the present application. The one or more units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution process of the computer program 53 in the terminal device 50. For example, the computer program 53 may be divided into a determining unit, an executing unit and a reporting unit, and the specific functions of each unit are as described above.

The terminal device may include, but is not limited to, a processor 51, a memory 52. Those skilled in the art will appreciate that fig. 6 is merely an example of a terminal device 50 and does not constitute a limitation of terminal device 50 and may include more or fewer components than shown, or some components may be combined, or different components, for example, the terminal device may also include input-output devices, network access devices, buses, etc.

The Processor 51 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 52 may be an internal storage unit of the terminal device 50, such as a hard disk or a memory of the terminal device 50. The memory 52 may also be an external storage device of the terminal device 50, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the terminal device 50. Further, the memory 52 may also include both an internal storage unit and an external storage device of the terminal device 50. The memory 52 is used for storing the computer programs and other programs and data required by the terminal device. The memory 52 may also be used to temporarily store data that has been output or is to be output.

The embodiment of the application has the following technical effects:

(1) the method has the advantages that the correct power is calculated in real time under the scene of wrong wiring, and the operation of verifying the average power factor during the wrong wiring is avoided.

(2) The method has the advantages that the use scenes are complete, all the scenes can be considered, and the power factor range of the load can be measured correctly at any angle.

(3) All three-phase four-wire wiring modes are covered.

(4) The calibration is convenient, the pulse is output according to the correct power, and the correctness of the electric energy correction is convenient to calibrate.

(5) The vector of the voltage and the current is adopted to calculate the correct power, and the formula is simple and strict.

(6) The method is rigorous, and the voltage and the current between phases are not required to be assumed to be in an equilibrium state, so that errors caused by approximation cannot be introduced.

(7) The scheme can store a plurality of sets of electric energy and has high reliability.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.