CN115963433A - Electric energy meter wiring checking method, device, equipment and storage medium - Google Patents
Electric energy meter wiring checking method, device, equipment and storage medium Download PDFInfo
- Publication number
- CN115963433A CN115963433A CN202310236605.XA CN202310236605A CN115963433A CN 115963433 A CN115963433 A CN 115963433A CN 202310236605 A CN202310236605 A CN 202310236605A CN 115963433 A CN115963433 A CN 115963433A
- Authority
- CN
- China
- Prior art keywords
- phase angle
- phase
- voltage
- current
- electric energy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000007689 inspection Methods 0.000 claims abstract description 47
- 238000005259 measurement Methods 0.000 claims description 6
- 238000010248 power generation Methods 0.000 claims description 5
- 238000000819 phase cycle Methods 0.000 description 25
- 238000010586 diagram Methods 0.000 description 10
- 230000005611 electricity Effects 0.000 description 6
- 230000004044 response Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention provides a method, a device, equipment and a storage medium for checking the wiring of an electric energy meter, wherein the method comprises the following steps: selecting a zero phase angle display reference port, acquiring an actual phase angle of an input phase voltage in the zero phase angle display reference port, wherein the zero phase angle display reference port is a voltage input port of which the phase angle display in the inspection equipment is always zero; constructing a voltage phase angle display sample library and a current phase angle display sample library corresponding to all the wiring modes of the electric energy meter in the inspection equipment based on an actual phase angle for displaying an input phase voltage in a zero phase angle reference port and the wiring modes of the electric energy meter; acquiring a voltage display phase angle and a current display phase angle of the electric energy meter to be detected, and inquiring a corresponding connection mode from a voltage phase angle display sample library and a current phase angle display sample library to obtain the connection mode of the electric energy meter to be detected. The wiring identification accuracy and the wiring mode judgment speed of the electric energy meter are improved, intelligent and quick identification is realized, and the operation is more convenient.
Description
Technical Field
The invention belongs to the technical field of power supply measurement, and relates to a method, a device, equipment and a storage medium for checking the wiring of an electric energy meter.
Background
In an electric power three-phase four-wire power supply system, a three-phase four-wire electric energy meter plays an indispensable role as important energy metering settlement equipment. The three-phase four-wire electric energy meter is especially applied to a three-phase four-wire three-element electric energy meter of a high-voltage line, and is provided with an external mutual inductor, and whether the wiring of the external mutual inductor is correct or not directly influences the electricity consumption metering and the expense settlement. At a power grid user end, the wrong input wiring of the three-phase four-wire electric energy meter, particularly the man-made wrong wiring, changes the phase sequence of voltage and current, causes deviation of power calculation, reduces the electricity charge pricing, causes pricing loss, and disturbs or even destroys the normal common electricity sequence. However, it is difficult to distinguish the wrong input connection of the three-phase four-wire electric energy meter by manual observation, and therefore, a professional electric power tool needs to be used to check and distinguish whether the connection of the power grid user terminal is correct.
At present, in an electric three-phase four-wire system, the wiring identification of a three-phase four-wire electric energy meter is checked by a traditional checking mode and a special detecting instrument. In a traditional inspection mode, professional inspection workers are mainly used, and a universal meter is used for judging whether a voltage line is not connected to a wiring terminal of the electric energy meter or not according to effective values of phase voltage and line voltage of three-phase four-wire; utilize the current clamp of electrified current and direction demonstration, according to three-phase four-wire electric energy meter input/output binding post direction, the direction of clamp inspection current on the electric wire, especially to the three-phase four-wire electric energy meter that has external sensor original paper, the current clamp is according to the mutual-inductor polarity direction of electric energy meter, the clamp is on the same electric wire, inspection current size and direction, judge whether the direction reversal connects of mutual-inductor, but this kind of inspection mode, can only simply judge whether the voltage line of each phase has access three-phase four-wire electric energy meter, and whether the direction reversal connects of current mutual-inductor, can not effectual inspection go out to access to voltage between each phase place of three-phase four-wire electric energy meter, the phase sequence problem of current, consequently, can't judge the measurement loss problem. The special instrument checking mode mainly depends on professional checking workers, instrument tools with the wiring identification function, such as a portable electricity utilization tester, an electricity utilization checker, a field check meter and the like, are utilized, and according to the wiring mode of the detected three-phase four-wire electric energy meter, the testing instruments are connected into a tested circuit through the testing wires in a one-to-one correspondence mode, and the wiring identification result is obtained. However, the existing special instruments are different in the identification method of three-phase four-wire, and the accuracy of the identification result is different due to different methods in effect, so that the existing special instruments are not convenient enough in engineering application.
Disclosure of Invention
Based on the above, the invention provides a method, a device, equipment and a storage medium for checking the wiring of an electric energy meter, and solves the problems of low accuracy and inconvenient operation of the wiring identification of the electric energy meter in the conventional electric energy meter wiring identification method.
The invention provides an electric energy meter wiring checking method, which comprises the following steps:
selecting a zero phase angle display reference port, and acquiring an actual phase angle of an input phase voltage in the zero phase angle display reference port, wherein the zero phase angle display reference port is a voltage input port of which the phase angle display in the inspection equipment is always zero;
constructing a voltage phase angle display sample library and a current phase angle display sample library corresponding to all the wiring modes of the electric energy meter in the inspection equipment based on the actual phase angle of the input phase voltage in the zero phase angle display reference port and the wiring modes of the electric energy meter;
and acquiring a voltage display phase angle and a current display phase angle of the electric energy meter to be detected, and inquiring a corresponding connection mode from the voltage phase angle display sample library and the current phase angle display sample library to obtain the connection mode of the electric energy meter to be detected.
Further, the constructing a voltage phase angle display sample library and a current phase angle display sample library corresponding to all the wiring modes of the electric energy meter in the inspection equipment based on the actual phase angle of the input phase voltage in the zero phase angle display reference port and the wiring modes of the electric energy meter comprises:
according to the wiring mode of accessing the three-phase voltage to the electric energy meter, accessing each wiring mode of the three-phase voltage to the inspection equipment correspondingly;
acquiring an actual phase angle of each phase voltage of each wiring mode of the three-phase voltage from a power generation end, and acquiring a display phase angle of a residual voltage input port based on the actual phase angle of the phase voltage input into the zero phase angle reference port and the actual phase angle of the phase voltage input into the residual voltage input port;
obtaining a voltage phase angle display sample library through the display phase angle of the voltage input port of each connection mode of the three-phase voltage;
constructing the current phase angle display sample library based on the phase voltage actual phase angle input to the zero phase angle reference port and the voltage phase angle display sample library.
Further, the obtaining the display phase angle of the residual voltage input port based on the actual phase angle of the phase voltage input to the zero phase angle reference port and the actual phase angle of the phase voltage input to the residual voltage input port comprises:
and taking the actual phase angle of the phase voltage of the zero phase angle reference port as a phase angle offset amount, and offsetting the actual phase angle of the phase voltage of the residual voltage input port according to an offset mode that the actual phase angle offset of the phase voltage of the zero phase angle reference port is zero degree to obtain the display phase angle of the phase voltage of the residual voltage input port.
Further, the constructing the current phase angle display sample library based on the phase voltage actual phase angle input to the zero phase angle reference port and the voltage phase angle display sample library comprises:
the method comprises the steps of obtaining a three-phase current wiring mode corresponding to each wiring mode of three-phase voltage, and connecting the three-phase current wiring mode into inspection equipment, wherein the three-phase current wiring mode comprises the size and the direction of phase current of an input current input port;
measuring the actual phase angle of each phase current of the current input port of each wiring mode of the three-phase current, and acquiring the display phase angle of each phase current of the current input port of each wiring mode based on the actual phase angle of each phase current of the current input port of each wiring mode and the actual phase angle of the phase voltage of the zero phase angle reference port;
and obtaining a current phase angle display sample library based on the display phase angle of each phase current of the current input port of each connection mode of the three-phase current corresponding to each connection mode of the three-phase voltage.
Further, the obtaining a display phase angle of each phase current of the current input port of each connection mode based on the actual phase angle of each phase current of the current input port of each connection mode and the actual phase angle of the phase voltage of the zero phase angle reference port of each connection mode includes:
and shifting the actual phase angle of each phase current of the current input port of each wiring mode by using the actual phase angle of the phase voltage of the zero phase angle reference port as a phase angle shift amount and according to a shifting mode that the actual phase angle of the phase voltage of the zero phase angle reference port is shifted to zero degree, so as to obtain the display phase angle of each phase current of the current input port of each wiring mode.
Further, the obtaining of a voltage display phase angle and a current display phase angle of the electric energy meter to be detected, and querying a corresponding connection mode from the voltage phase angle display sample library and the current phase angle display sample library to obtain the connection mode of the electric energy meter, further includes:
the electric energy loss measurement is carried out on the electric energy meter which is not wired according to standard wiring, and the method specifically comprises the following steps:
and dividing the electric energy measured by actual wiring by an electric energy deviation coefficient to obtain the electric energy corresponding to correct wiring, wherein the electric energy deviation coefficient is the ratio of the electric energy measured by the actual wiring mode to the electric energy measured by the standard wiring mode in a specific time.
Further, the obtaining of a voltage display phase angle and a current display phase angle of the electric energy meter to be detected, and querying a corresponding connection mode from the voltage phase angle display sample library and the current phase angle display sample library to obtain the connection mode of the electric energy meter, further includes:
and coding the wiring mode of the electric energy meter to be detected into a corresponding data format according to a preset coding rule.
The invention also provides an electric energy meter wiring inspection device, which comprises:
the device comprises a selecting module, a zero phase angle display module and a phase angle display module, wherein the selecting module is used for selecting a zero phase angle display reference port and acquiring an actual phase angle of an input phase voltage in the zero phase angle display reference port, and the zero phase angle display reference port is a voltage input port of which the phase angle display in the inspection equipment is always zero;
the sample library establishing module is used for establishing a voltage phase angle display sample library and a current phase angle display sample library corresponding to all the wiring modes of the electric energy meter in the inspection equipment based on the actual phase angle of the input phase voltage in the zero phase angle reference port and the wiring modes of the electric energy meter;
and the acquisition module is used for acquiring a voltage display phase angle and a current display phase angle of the electric energy meter to be detected, and inquiring corresponding wiring modes in the voltage phase angle display sample library and the current phase angle display sample library to obtain the wiring mode of the electric energy meter to be detected.
The invention also provides a computer device comprising a processor and a memory; the memory is used for storing software programs and modules, and the processor realizes the method of any one of the above items by running or executing the software programs and/or modules stored in the memory.
The invention also provides a computer readable storage medium for storing program code for execution by a processor, the program code comprising instructions for implementing a method according to any one of the above.
The invention provides an electric energy meter wiring inspection method, which comprises the steps of constructing a voltage phase angle display sample library and a current phase angle display sample library by selecting a zero phase angle display reference port and based on an actual phase angle of an input phase voltage in the zero phase angle display reference port and the electric energy meter wiring mode; when the wiring mode of the electric energy meter to be detected is obtained, the inspection equipment accesses the wiring mode of the three-phase four-wire element according to the electric energy meter to be detected, and accesses the three-phase four-wire element, so that a voltage display phase angle and a current display phase angle corresponding to the wiring mode of the electric energy meter to be detected are obtained, and then the corresponding wiring mode is inquired in the voltage phase angle display sample library and the current phase angle display sample library according to the obtained voltage display phase angle and current display phase angle, so that the wiring mode of the electric energy meter to be detected is obtained. The electric energy meter wiring identification accuracy and the electric energy meter wiring mode distinguishing speed are improved, meanwhile, intelligent and quick identification is achieved, and the operation is more convenient and fast. The invention also provides a device, equipment and a storage medium for checking the wiring of the electric energy meter, and the beneficial effects can be realized.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for checking the wiring of an electric energy meter according to an embodiment of the present invention.
Fig. 2 is a block diagram illustrating an electric energy meter wiring checking device according to an embodiment of the present invention.
Fig. 3 is a block diagram of the sample library creating module in fig. 2.
Fig. 4 is a schematic block diagram of an actual phase angle acquisition module in fig. 2.
Fig. 5 is a block diagram illustrating another device for checking the connection of an electric energy meter according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a computer device 600 according to an embodiment of the disclosure.
FIG. 7 discloses a computer storage medium for an embodiment of the invention.
Detailed Description
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof in the description and claims of this application and the description of the figures above, are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different objects and not for describing a particular order.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for the convenience of description of the present application, and have no specific meaning in themselves.
As shown in fig. 1, a schematic flow chart of a method for checking the wiring of an electric energy meter according to an embodiment of the present invention is shown, where the method includes:
the method comprises the following steps that S1, a zero phase angle display reference port is selected, and the actual phase angle of input phase voltage in the zero phase angle display reference port is obtained, wherein the zero phase angle display reference port is a voltage input port of which the phase angle display in inspection equipment is always zero;
s2, constructing a voltage phase angle display sample library and a current phase angle display sample library corresponding to all wiring modes of the electric energy meter in the inspection equipment based on the actual phase angle of the input phase voltage in the zero phase angle display reference port and the wiring modes of the electric energy meter;
and S3, acquiring a voltage display phase angle and a current display phase angle of the electric energy meter to be detected, and inquiring corresponding wiring modes from the voltage phase angle display sample library and the current phase angle display sample library to obtain the wiring mode of the electric energy meter to be detected.
Specifically, the input port of the voltage on the inspection equipment is provided with U A 、U B 、U C In this embodiment, U is selected A The ports being indicative of a zero-phase reference port, i.e. no matter U A Which phase voltage signal is actually input into the port, and the equipment U is checked A Phase angle display reading corresponding to port
Is always 0 deg., and in each phase voltage connection mode, U A The actual phase angle of the port actual input phase voltage is then measured in U A Actual phase angle of port actual input phase voltage and eachPhase voltage connection mode, and obtaining U corresponding to each phase voltage connection mode B 、U C And (4) displaying the phase angle in the port, and further obtaining a voltage phase angle display sample library consisting of phase voltage display phase angles corresponding to each wiring mode. Then measuring the phase angle corresponding to the phase current connection corresponding to each phase voltage, i.e. connecting the phase current connection to the current input port I according to the specific current connection mode of each phase A 、I B 、I C And then measuring the display phase angle of the current in each port in the inspection equipment corresponding to each current wiring mode, and further obtaining a current phase angle display sample library consisting of the phase current display phase angles corresponding to each current wiring mode. The method comprises the steps of accessing an inspection device into a three-phase four-wire element according to a wiring mode of accessing a detected electric energy meter into the three-phase four-wire element, obtaining a voltage display phase angle and a current display phase angle of a wiring mode of accessing the electric energy meter to be detected into the three-phase four-wire element, and then searching corresponding wiring modes in a voltage phase angle display sample library and a current phase angle display sample library, wherein the wiring mode is the wiring mode of accessing the electric energy meter to be detected into the three-phase four-wire element.
In some embodiments, the step S2 comprises:
step S21, according to the wiring mode of the three-phase voltage accessing the electric energy meter, accessing each wiring mode of the three-phase voltage into the inspection equipment correspondingly;
step S22, acquiring an actual phase angle of each phase voltage of each wiring mode of the three-phase voltage from a power generation end, and acquiring a display phase angle of the residual voltage input port based on the actual phase angle of the phase voltage input into the zero phase angle reference port and the actual phase angle of the phase voltage input into the residual voltage input port;
further, the step S22 is: and shifting the actual phase angle of the phase voltage of the residual voltage input port by taking the actual phase angle of the phase voltage of the zero phase angle reference port as a phase angle shift amount and according to a shifting mode that the actual phase angle of the phase voltage of the zero phase angle reference port is shifted to zero degree, so as to obtain the display phase angle of the phase voltage of the residual voltage input port.
S23, obtaining a voltage phase angle display sample library through the display phase angle of the voltage input port of each three-phase voltage connection mode;
and S24, constructing the current phase angle display sample library based on the actual phase angle of the phase voltage input into the zero phase angle reference port and the voltage phase angle display sample library.
Specifically, in the existing wiring mode of the electric energy meter, the phase sequence of the access voltage is combined with' U a U b U c 、U a U c U b 、U b U a U c 、U b U c U a 、U c U a U b 、U c U b U a "these 6 modes, 6 phase voltage connection modes are respectively connected to the inspection equipment to obtain the actual phase angle of each phase voltage of three-phase voltage of power generation end of each connection mode, then the voltage input port U A 、U B 、U C The display phase angle of (a) is:
wherein X is A, B and C, and obtaining a voltage input port U of each wiring mode B 、U C The display phase angle of (c). In this embodiment, the device U is checked A Port phase angle display reading->
Always 0 deg., resulting in a partial voltage phase angle display sample library as shown in table 1. Then, on the premise of each phase voltage, the wiring mode of the phase current is obtained, the wiring mode of each phase current is connected into the inspection equipment, and the current input port I in the inspection equipment of each phase current wiring mode is obtained through measurement A 、I B 、I C Through the current input port I A 、I B 、I C Voltage input port U of the actual phase angle A Obtaining the current input port I of each current wiring mode A 、I B 、I C And further obtaining a current phase angle display sample library.
TABLE 1
Partial voltage phase angle at time indicates that the sample bank +>
According to the method, the phase angle range displayed by the actual signal of the calculation port is expanded to-360 degrees through calibration of the UA signal reference of the hardware port, and compared with a vector diagram, the resolution of the phase sequence of the three-phase four-wire voltage line is improved, and the problem of phase sequence resolution is solved;
in some embodiments, the step S24 includes:
step S241, obtaining a three-phase current wiring mode corresponding to each three-phase voltage wiring mode, and connecting each three-phase current wiring mode into the inspection equipment, wherein the three-phase current wiring mode comprises the magnitude and the direction of phase current input into a current input port;
step S242, measuring the actual phase angle of each phase current of the current input port of each wiring mode of the three-phase current, and acquiring the display phase angle of each phase current of the current input port of each wiring mode based on the actual phase angle of each phase current of the current input port of each wiring mode and the actual phase angle of the phase voltage of the zero phase angle reference port;
further, the step S242 specifically includes: and taking the actual phase angle of the phase voltage of the zero phase angle reference port as a phase angle offset amount, and offsetting the actual phase angle of each phase current of the current input port of each wiring mode in an offset mode that the actual phase angle of the phase voltage of the zero phase angle reference port is offset to zero degree to obtain the display phase angle of each phase current of the current input port of each wiring mode.
And S242, obtaining a current phase angle display sample library based on the display phase angle of each phase current of the current input port of each connection mode of the three-phase current corresponding to each connection mode of the three-phase voltage.
Specifically, the phase sequence of the phase current connected to the electric energy meter is I a I b I c 、I a I c I b 、I b I a I c 、I b I c I a 、I c I a I b 、I c I b I a In the 6 modes, the current value is negative to indicate the current reversal, and the current value is positive to indicate the current positive, so that the current direction corresponding to each phase sequence of the three-phase current is combined with the 8 modes of "++++++ - + - + - + - - -" in the combination. Selecting one of phase voltage connection modes to be connected into the inspection equipment, selecting one of phase current sequence and phase current sequence corresponding to one of current direction to be connected into the inspection equipment, and measuring a current input port I in the inspection equipment A 、I B 、I C Then reference port U based on the display zero phase angle A Obtaining the actual phase angle of the medium input phase voltage and the actual phase angle of each phase current wiring mode to obtain a current input port I A 、I B 、I C The display phase angle of (a) is:
wherein X is A, B, C, and obtaining current input port I of each phase current wiring mode A 、I B 、I C The display phase angle of each phase is obtained by obtaining the current phase sequence and direction of each phase in the connection mode of each phase voltage, and then a current phase angle display sample library is obtained. In this embodiment, the device U is checked A Port phase angle display reading->
Is always 0 DEG, and the connection mode of phase voltage is U b U a U c And obtaining a partial current phase angle display sample library as shown in the table 2.
TABLE 2
The phase voltage connection mode is U b U a U c Time, partial voltage phase angle display sample library
Such as phase current wiring mode of-I a I c -I b Current input port I of access inspection equipment A 、I B 、I C Then current input port I A Display phase angle of
Current input port I B Shows a phase angle of->
Current input port I C Shows a phase angle of->
。
In some embodiments, the method further comprises:
and S4, carrying out electric energy loss measurement on the electric energy meter which is not wired according to standard wiring, specifically comprising the following steps:
and dividing the electric energy measured by actual wiring by an electric energy deviation coefficient to obtain the electric energy corresponding to correct wiring, wherein the electric energy deviation coefficient is the ratio of the electric energy measured by the actual wiring mode to the electric energy measured by the standard wiring mode in a specific time.
Specifically, by measuring the electric energy loss of the electric energy meter which is not wired according to standard wiring, the electric energy charge of a charging period can be corrected, the charging loss of the electric charge is reduced, and the normal electricity utilization order is maintained.
In some embodiments, the method further comprises:
and S5, coding the wiring mode of the electric energy meter to be detected into a corresponding data format according to a preset coding rule.
Specifically, in the present embodiment, the wiring manner is encoded into a 16-bit data type, i.e. two bytes, which is initially 0x0000H, wherein b15 to b10 are reserved bits, b9 to b0 are valid bits, b9 is a voltage phase sequence flag bit, and b8 to b6 are electric bitsA phase-sequence state bit, b 5-b 3 are current phase-sequence state bits, b 2-b 0 are current direction state bits, and a positive voltage phase-sequence U a U b U c 、U b U a U c 、U c U a U b When b9 is set to 1, the voltage is negative phase sequence U a U c U b 、U b U c U a 、、U c U b U a When so, b9 is set to 0; voltage phase sequence U a U b U c When b 8-b 6 are set to 000, the voltage phase sequence U b U c U a When b 8-b 6 are set to 001, the voltage phase sequence U c U a U b Then, b 8-b 6 are set to 010; voltage phase sequence U a U c U b When b 8-b 6 are placed at 011, the voltage phase sequence U b U a U c When b 8-b 6 are set to 100, the voltage phase sequence U c U a U b Then b 8-b 6 are placed in a container 101; setting b 5-b 3 to 000 when the current phase sequence is Ia Ib Ic, setting b 5-b 3 to 001 when the current phase sequence is Ib Ic Ia, and setting b 5-b 3 to 010 when the current phase sequence is Ic Ia Ib; when the current phase sequence Ia Ic Ib is adopted, b 5-b 3 are arranged to be 011, when the current phase sequence Ib Ic Ia is adopted, b 5-b 3 are arranged to be 100, and when the current phase sequence Ib is adopted, b 5-b 3 are arranged to be 101; and (3) writing 1 at a position corresponding to b 5-b 3 if the direction of the channel current is a forward direction, and writing 0 at a position corresponding to b 2-b 0 if the direction of the channel current is a reverse direction. In practical applications, it may be encoded according to a specific data protocol.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by functions and internal logic of the process, and should not limit the implementation process of the embodiments of the present invention in any way.
According to the method for checking the wiring of the electric energy meter, provided by the embodiment of the invention, a voltage phase angle display sample library and a current phase angle display sample library are constructed by selecting a zero phase angle display reference port and based on an actual phase angle of an input phase voltage in the zero phase angle display reference port and the wiring mode of the electric energy meter; when the wiring mode of the electric energy meter to be detected is obtained, the inspection equipment accesses the wiring mode of the three-phase four-wire element according to the electric energy meter to be detected, and accesses the three-phase four-wire element, so that a voltage display phase angle and a current display phase angle corresponding to the wiring mode of the electric energy meter to be detected are obtained, and then the corresponding wiring mode is inquired in the voltage phase angle display sample library and the current phase angle display sample library according to the obtained voltage display phase angle and current display phase angle, so that the wiring mode of the electric energy meter to be detected is obtained. The electric energy meter wiring identification accuracy and the electric energy meter wiring mode distinguishing speed are improved, meanwhile, intelligent and rapid identification is achieved, and the operation is more convenient and fast.
As shown in fig. 2, a schematic block diagram of an electric energy meter wiring checking device 200 according to an embodiment of the present invention is provided, where the device 200 includes:
the selecting module 201 is configured to select a zero-phase-angle-displayed reference port, and acquire an actual phase angle of an input phase voltage in the zero-phase-angle-displayed reference port, where the zero-phase-angle-displayed reference port is a voltage input port in the inspection device where the phase angle display is always zero;
a sample library establishing module 202, configured to establish a voltage phase angle display sample library and a current phase angle display sample library corresponding to all connection modes of the electric energy meter in the inspection device based on an actual phase angle of an input phase voltage in the zero phase angle reference port and the connection modes of the electric energy meter;
the obtaining module 203 is configured to obtain a voltage display phase angle and a current display phase angle of the electric energy meter to be detected, and obtain a connection mode of the electric energy meter to be detected by querying a corresponding connection mode in the voltage phase angle display sample library and the current phase angle display sample library.
In some embodiments, as shown in FIG. 3, the sample library creation module 202 includes:
the access module 2021 is configured to access the inspection device in a corresponding manner according to a connection manner of a three-phase voltage to the electric energy meter;
the actual phase angle acquisition module 2022 is configured to acquire an actual phase angle of each phase voltage of each connection mode of the three-phase voltage from the power generation end, and acquire a display phase angle of the residual voltage input port based on the actual phase angle of the phase voltage input to the zero phase angle reference port and the actual phase angle of the phase voltage input to the residual voltage input port;
the voltage phase angle display sample library obtaining module 2023 is configured to obtain the voltage phase angle display sample library through the display phase angle of the voltage input port of each connection mode of the three-phase voltage;
a current phase angle display sample library obtaining module 2024, configured to construct the current phase angle display sample library based on the phase voltage actual phase angle input to the zero phase angle reference port and the voltage phase angle display sample library.
In some embodiments, as shown in fig. 3, the actual phase angle acquisition module 2022 comprises:
the first shifting module 20221 is configured to shift the actual phase angle of the phase voltage of the residual voltage input port by using the actual phase angle of the phase voltage of the zero phase angle reference port as a phase angle shift amount and in a shifting manner that the actual phase angle of the phase voltage of the zero phase angle reference port is shifted by zero degrees, so as to obtain the display phase angle of the phase voltage of the residual voltage input port.
In some embodiments, as shown in fig. 4, the current phase angle display sample bank acquisition module 2024 comprises:
the three-phase current wiring mode obtaining module 20241 is configured to obtain a three-phase current wiring mode corresponding to each wiring mode of a three-phase voltage, and access the three-phase current wiring mode to the inspection device, where the three-phase current wiring mode includes a phase current magnitude and a phase current direction of an input current input port;
a display phase angle acquisition module 20242 for each phase current, configured to measure an actual phase angle of each phase current at the current input port of each connection mode of the three-phase current, and acquire a display phase angle of each phase current at the current input port of each connection mode based on the actual phase angle of each phase current at the current input port of each connection mode and the actual phase angle of the phase voltage at the zero-phase angle reference port;
a building module 20243, configured to obtain a current phase angle display sample library based on a display phase angle of each phase current of a current input port of each connection mode of the three-phase current corresponding to each connection mode of the three-phase voltage.
In some embodiments, as shown in fig. 4, the displayed phase angle acquisition module 20242 for each phase current includes:
a second shifting module 202421, configured to shift the actual phase angle of the phase current of the current input port of each connection method in a shifting manner that the actual phase angle of the phase voltage of the zero phase angle reference port is a phase angle shift amount and the actual phase angle of the phase current of the current input port of each connection method is zero, so as to obtain the display phase angle of the phase current of the current input port of each connection method.
In some embodiments, as shown in fig. 5, a schematic block diagram of another electric energy meter wiring inspection device 200 provided for the embodiment of the present invention is shown, where the device 200 further includes:
the electric energy correction module 204 is used for measuring the electric energy loss of the electric energy meter which is not wired according to standard wiring, and specifically comprises the following steps:
and dividing the electric energy measured by actual wiring by an electric energy deviation coefficient to obtain the electric energy corresponding to correct wiring, wherein the electric energy deviation coefficient is the ratio of the electric energy measured by the actual wiring mode to the electric energy measured by the standard wiring mode in a specific time.
In some embodiments, as shown in fig. 5, a block diagram of another electric energy meter wiring inspecting device 200 provided for the embodiment of the present invention is schematically illustrated, where the device 200 further includes:
and the encoding module 205 is configured to encode the connection mode of the electric energy meter to be detected into a corresponding data format according to a preset encoding rule.
For the specific limitations of the device for checking the wiring of the electric energy meter, reference may be made to the above limitations of the method for checking the wiring of the electric energy meter, which are not described herein again. All or part of each module in the electric energy meter wiring inspection device can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a computer device 600 according to an embodiment of the disclosure. As shown in fig. 6, the device 600 may include a processor 601 and a memory 602; the memory 602 is used for storing software programs and modules, and the processor 601 implements any one of the above methods for checking the wiring of the electric energy meter by running or executing the software programs and/or modules stored in the memory 602.
Referring to fig. 7, an embodiment of the present invention discloses a computer storage medium 701, where the computer storage medium 701 is used for storing program codes executed by a processor, and the program codes include instructions for implementing any one of the above methods for checking wiring of an electric energy meter.
The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a Read Only Memory (ROM), an Erasable Programmable Read Only Memory (EPROM), a flash Memory, an optical fiber, a portable compact disc Read Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present application may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C + +, and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely 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 type of Network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the description of the invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The word "if," as used herein, may be interpreted as "at \8230; \8230when" or "when 8230; \823030when" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
In the several embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. An electric energy meter wiring checking method is characterized by comprising the following steps:
selecting a zero phase angle display reference port, and acquiring an actual phase angle of an input phase voltage in the zero phase angle display reference port, wherein the zero phase angle display reference port is a voltage input port of which the phase angle display in the inspection equipment is always zero;
constructing a voltage phase angle display sample library and a current phase angle display sample library corresponding to all the wiring modes of the electric energy meter in the inspection equipment based on the actual phase angle of the input phase voltage in the zero phase angle display reference port and the wiring modes of the electric energy meter;
and acquiring a voltage display phase angle and a current display phase angle of the electric energy meter to be detected, and inquiring a corresponding connection mode from the voltage phase angle display sample library and the current phase angle display sample library to obtain the connection mode of the electric energy meter to be detected.
2. The method as claimed in claim 1, wherein the step of constructing a voltage phase angle display sample library and a current phase angle display sample library corresponding to all the wiring modes of the electric energy meter in the inspection device based on the actual phase angle of the input phase voltage in the zero phase angle display reference port and the wiring modes of the electric energy meter comprises:
according to the wiring mode of three-phase voltage accessing the electric energy meter, accessing each wiring mode of the three-phase voltage into the inspection equipment correspondingly;
acquiring an actual phase angle of each phase voltage of each wiring mode of the three-phase voltage from a power generation end, and acquiring a display phase angle of a residual voltage input port based on the actual phase angle of the phase voltage input into the zero phase angle reference port and the actual phase angle of the phase voltage input into the residual voltage input port;
obtaining a voltage phase angle display sample library through the display phase angle of the voltage input port of each connection mode of the three-phase voltage;
constructing the current phase angle display sample library based on the phase voltage actual phase angle input to the zero phase angle reference port and the voltage phase angle display sample library.
3. The method for checking the wiring of the electric energy meter according to claim 2, wherein the step of obtaining the display phase angle of the residual voltage input port based on the actual phase angle of the phase voltage input to the zero phase angle reference port and the actual phase angle of the phase voltage input to the residual voltage input port comprises the steps of:
and shifting the actual phase angle of the phase voltage of the residual voltage input port by taking the actual phase angle of the phase voltage of the zero phase angle reference port as a phase angle shift amount and according to a shifting mode that the actual phase angle of the phase voltage of the zero phase angle reference port is shifted to zero degree, so as to obtain the display phase angle of the phase voltage of the residual voltage input port.
4. The method as claimed in claim 2, wherein the step of constructing the current phase angle display sample library based on the phase voltage actual phase angle and the voltage phase angle display sample library inputted to the zero phase angle reference port comprises:
the method comprises the steps of obtaining a three-phase current wiring mode corresponding to each wiring mode of three-phase voltage, and connecting the three-phase current wiring mode into inspection equipment, wherein the three-phase current wiring mode comprises the size and the direction of phase current of an input current input port;
measuring the actual phase angle of each phase current of the current input port of each wiring mode of the three-phase current, and acquiring the display phase angle of each phase current of the current input port of each wiring mode based on the actual phase angle of each phase current of the current input port of each wiring mode and the actual phase angle of the phase voltage of the zero phase angle reference port;
and obtaining a current phase angle display sample library based on the display phase angle of each phase current of the current input port of each connection mode of the three-phase current corresponding to each connection mode of the three-phase voltage.
5. The method as claimed in claim 4, wherein the obtaining the displayed phase angle of the phase current of the current input port of each connection mode based on the actual phase angle of the phase current of the current input port of each connection mode and the actual phase angle of the phase voltage of the zero-phase angle reference port comprises:
and shifting the actual phase angle of each phase current of the current input port of each wiring mode by using the actual phase angle of the phase voltage of the zero phase angle reference port as a phase angle shift amount and according to a shifting mode that the actual phase angle of the phase voltage of the zero phase angle reference port is shifted to zero degree, so as to obtain the display phase angle of each phase current of the current input port of each wiring mode.
6. The method for inspecting the wiring of the electric energy meter according to claim 1, wherein the method for inspecting the wiring of the electric energy meter comprises the following steps of obtaining a voltage display phase angle and a current display phase angle of the electric energy meter to be inspected, inquiring corresponding wiring modes from the voltage phase angle display sample library and the current phase angle display sample library, and after obtaining the wiring modes of the electric energy meter to be inspected, further comprising the following steps:
the electric energy loss measurement is carried out on the electric energy meter which is not wired according to standard wiring, and the method specifically comprises the following steps:
and dividing the electric energy measured by actual wiring by an electric energy deviation coefficient to obtain the electric energy corresponding to correct wiring, wherein the electric energy deviation coefficient is the ratio of the electric energy measured by the actual wiring mode to the electric energy measured by the standard wiring mode in a specific time.
7. The method for inspecting the wiring of the electric energy meter according to claim 1, wherein the method for inspecting the wiring of the electric energy meter comprises the following steps of obtaining a voltage display phase angle and a current display phase angle of the electric energy meter to be inspected, inquiring corresponding wiring modes from the voltage phase angle display sample library and the current phase angle display sample library, and after obtaining the wiring modes of the electric energy meter to be inspected, further comprising the following steps:
and coding the wiring mode of the electric energy meter to be detected into a corresponding data format according to a preset coding rule.
8. An electric energy meter wiring inspection device, characterized in that the device comprises:
the device comprises a selecting module, a zero phase angle display module and a phase angle display module, wherein the selecting module is used for selecting a zero phase angle display reference port and acquiring an actual phase angle of an input phase voltage in the zero phase angle display reference port, and the zero phase angle display reference port is a voltage input port of which the phase angle display in the inspection equipment is always zero;
the sample library establishing module is used for establishing a voltage phase angle display sample library and a current phase angle display sample library corresponding to all the wiring modes of the electric energy meter in the inspection equipment based on the actual phase angle of the input phase voltage in the zero phase angle reference port and the wiring modes of the electric energy meter;
and the acquisition module is used for acquiring a voltage display phase angle and a current display phase angle of the electric energy meter to be detected, and inquiring corresponding wiring modes in the voltage phase angle display sample library and the current phase angle display sample library to obtain the wiring modes of the electric energy meter to be detected.
9. A computer device, characterized in that the device comprises a processor and a memory; the memory is used for storing software programs and modules, and the processor realizes the method according to any one of claims 1 to 7 by running or executing the software programs and/or modules stored in the memory.
10. A computer-readable storage medium for storing program code for execution by a processor, the program code comprising instructions for implementing the method of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310236605.XA CN115963433B (en) | 2023-03-13 | 2023-03-13 | Electric energy meter wiring inspection method, device, equipment and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310236605.XA CN115963433B (en) | 2023-03-13 | 2023-03-13 | Electric energy meter wiring inspection method, device, equipment and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115963433A true CN115963433A (en) | 2023-04-14 |
| CN115963433B CN115963433B (en) | 2023-08-08 |
Family
ID=87354944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310236605.XA Active CN115963433B (en) | 2023-03-13 | 2023-03-13 | Electric energy meter wiring inspection method, device, equipment and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115963433B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062820A (en) * | 2010-12-03 | 2011-05-18 | 深圳市科陆电子科技股份有限公司 | Method for automatically correcting wiring error when measuring three-phase alternating current |
| CN102253359A (en) * | 2011-04-28 | 2011-11-23 | 深圳市锐能微科技有限公司 | Method and system for correcting false wiring of three-phase four-wire watt-hour meter and watt-hour meter |
| CN105988055A (en) * | 2014-10-07 | 2016-10-05 | 三菱电机株式会社 | Electric power measurement apparatus, and method for determining wire connection of AC circuit and electric power measurement apparatus |
| CN107329105A (en) * | 2017-06-26 | 2017-11-07 | 云南电网有限责任公司西双版纳供电局 | A kind of three-phase and four-line multifunctional electric energy meter wiring determination methods |
| CN206876762U (en) * | 2017-05-17 | 2018-01-12 | 郑州万特电气股份有限公司 | A kind of intelligent electric energy meter for automatic identification false wiring |
| CN109782111A (en) * | 2019-03-06 | 2019-05-21 | 国网湖北省电力有限公司黄石供电公司 | A kind of electric energy metered system false wiring analysis method of three-phase three-wire system |
| CN111983521A (en) * | 2020-06-05 | 2020-11-24 | 安徽南瑞中天电力电子有限公司 | Electric energy meter with functions of automatic identification of wrong wiring and correct metering and method thereof |
| CN114494681A (en) * | 2022-01-24 | 2022-05-13 | 江门市电力工程输变电有限公司 | Intelligent comparison method and system for wiring terminal, computer equipment and storage medium |
| CN115166351A (en) * | 2022-07-27 | 2022-10-11 | 广东电网有限责任公司 | Correction coefficient calculation method and device based on three-phase three-wire metering device |
| CN115754570A (en) * | 2022-12-08 | 2023-03-07 | 国网山东省电力公司电力科学研究院 | Low-voltage distribution area three-phase identification method, system, equipment and medium |
-
2023
- 2023-03-13 CN CN202310236605.XA patent/CN115963433B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062820A (en) * | 2010-12-03 | 2011-05-18 | 深圳市科陆电子科技股份有限公司 | Method for automatically correcting wiring error when measuring three-phase alternating current |
| CN102253359A (en) * | 2011-04-28 | 2011-11-23 | 深圳市锐能微科技有限公司 | Method and system for correcting false wiring of three-phase four-wire watt-hour meter and watt-hour meter |
| CN105988055A (en) * | 2014-10-07 | 2016-10-05 | 三菱电机株式会社 | Electric power measurement apparatus, and method for determining wire connection of AC circuit and electric power measurement apparatus |
| CN206876762U (en) * | 2017-05-17 | 2018-01-12 | 郑州万特电气股份有限公司 | A kind of intelligent electric energy meter for automatic identification false wiring |
| CN107329105A (en) * | 2017-06-26 | 2017-11-07 | 云南电网有限责任公司西双版纳供电局 | A kind of three-phase and four-line multifunctional electric energy meter wiring determination methods |
| CN109782111A (en) * | 2019-03-06 | 2019-05-21 | 国网湖北省电力有限公司黄石供电公司 | A kind of electric energy metered system false wiring analysis method of three-phase three-wire system |
| CN111983521A (en) * | 2020-06-05 | 2020-11-24 | 安徽南瑞中天电力电子有限公司 | Electric energy meter with functions of automatic identification of wrong wiring and correct metering and method thereof |
| CN114494681A (en) * | 2022-01-24 | 2022-05-13 | 江门市电力工程输变电有限公司 | Intelligent comparison method and system for wiring terminal, computer equipment and storage medium |
| CN115166351A (en) * | 2022-07-27 | 2022-10-11 | 广东电网有限责任公司 | Correction coefficient calculation method and device based on three-phase three-wire metering device |
| CN115754570A (en) * | 2022-12-08 | 2023-03-07 | 国网山东省电力公司电力科学研究院 | Low-voltage distribution area three-phase identification method, system, equipment and medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115963433B (en) | 2023-08-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110440846B (en) | Data acquisition method, system, terminal and storage medium of multi-turn encoder | |
| CN106443313A (en) | Rapid detection method for false wiring of high-voltage three-phase three-wire electric energy metering device | |
| CN102129061A (en) | Automatic wiring detection device and method for three-phase simulation electric energy meter | |
| CN104682520B (en) | A kind of electric vehicle alternating-current charging attachment means with gauge check port | |
| CN109507625A (en) | The automatic calibrating method and terminal device of battery simulator | |
| CN107132501A (en) | Electronic mutual inductor verification system and calibration method | |
| CN107843864A (en) | A kind of electrical measuring device dynamic property general-utility test platform | |
| CN106526305B (en) | It is a kind of for judging the phasor analysis device of three-phase second loop return wiring correctness | |
| CN207036924U (en) | Electric energy measurement multilevel iudge device | |
| CN110109043A (en) | Electric energy meter detection method, detection terminal and computer readable storage medium | |
| CN103023497B (en) | The digital signal of selsyn module and analog signal conversion accuracy method of testing | |
| CN115963433B (en) | Electric energy meter wiring inspection method, device, equipment and storage medium | |
| Luthfi et al. | Design of raspberry pi web-based energy monitoring system for residential electricity consumption | |
| CN111999684A (en) | One-key type transformer hexagonal diagram rapid tester | |
| CN104390728A (en) | Method for measuring thermocouple welding connection correctness before spacecraft thermal test | |
| CN215263995U (en) | Electric energy metering accuracy on-site calibration instrument | |
| CN102540135A (en) | Separated site calibrator and using method thereof | |
| CN106054117A (en) | Handheld metering fault error analyzer | |
| CN212932921U (en) | One-key type transformer hexagonal diagram rapid tester | |
| CN206557369U (en) | High-voltage electric-energy meter on-line monitoring system based on carrier communication | |
| CN114415100A (en) | Electric energy metering device on-site detection equipment and data transmission method thereof | |
| Gallano et al. | Design and implementation of phasor measurement unit with IoT technology | |
| CN208421056U (en) | A kind of multichannel electric power detection and alarm system based on cabinet | |
| CN210109301U (en) | Digital electric energy meter and power source magnitude traceability remote calibration system | |
| CN107064634A (en) | The detection method of Harmonious Waves in Power Systems |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |