A method and device for detecting the phase line in and out of a single-phase electric energy meter

Abstract

The application provides a detection method and device for phase line in and out of a single-phase electric energy meter, comprising: obtaining initial voltage data values of each phase line of the single-phase electric energy meter; sending a pull-out line command to the single-phase electric energy meter and obtaining a pull-out line execution result; obtaining voltage data values of each phase line after the pull-out line when the pull-out line execution is successful, and determining whether a screen can be lighted by a key; and determining whether the phase line of the electric energy meter is connected reversely according to the initial voltage data values, the voltage data values of each phase line after the pull-out line and the screen lightening condition. The application realizes quick and accurate judgment of the connection of the single-phase electric energy meter in and out of the phase line, ensures stable operation of the electric energy meter, reduces accidents such as water damage caused by connection errors, and has important significance for maintaining the stability of the power grid and the safety of electricity use.

Description

Technical Field

[0001] This invention relates to the field of power technology, and in particular to a method and apparatus for detecting the phase lines of a single-phase power meter. Background Technology

[0002] In the operation of power systems, the accuracy and reliability of electricity metering devices are crucial, affecting not only the economic interests of power companies but also the legitimate rights and safety of electricity customers. Single-phase electricity meters, as one of the most common electricity metering devices, are widely used in residential, commercial, and various industrial applications. However, in practice, wiring errors in single-phase electricity meters occur frequently, especially the reversed phase wire connections. This issue has become a major challenge in the management of electricity metering devices.

[0003] The reversal of phase wires entering and exiting is often caused by human factors such as improper operation or negligence during the construction or maintenance of power facilities. Incorrect wiring not only leads to inaccurate electricity metering but can also cause safety hazards such as voltage instability, wire overload, and short circuits, posing a serious threat to the stable operation of the power grid and electrical safety. For example, in some areas where floods occur due to natural disasters such as typhoons and torrential rains, water damage to electricity meters is frequent, partly due to incorrect wiring that reduces their waterproof performance.

[0004] Traditional methods for verifying electricity meter wiring rely primarily on manual, one-by-one checks, which are labor-intensive, inefficient, and prone to errors. With the development of smart grid technology and the continuous expansion of power systems, this traditional verification method can no longer meet the demands for efficient and accurate management. Therefore, researching and developing a scientific and efficient method for verifying reversed phase wire connections in single-phase electricity meters has become an urgent problem for the power industry. Thus, the ability to quickly and accurately determine reversed phase wire connections in single-phase electricity meters is of paramount importance. Summary of the Invention

[0005] The purpose of this invention is to provide a method and device for detecting the phase wires of a single-phase electricity meter, thereby solving the technical problem of how to quickly and accurately determine whether the phase wires of a single-phase electricity meter are reversed.

[0006] On the one hand, a method for detecting the phase line input and output of a single-phase energy meter is provided, including:

[0007] Obtain the initial voltage data values ​​of each phase line of a single-phase energy meter;

[0008] Send a trip command to the single-phase energy meter and obtain the trip execution result. When the trip is successfully executed, obtain the voltage data values ​​of each phase line after the trip and determine whether the screen can be lit up by the button.

[0009] According to the initial voltage data value, the voltage data value of each phase line after the pull-out operation, and the screen lighting condition, it is determined whether the phase line of the electric meter is connected reversely.

[0010] Preferably, the determination of whether the phase line of the electric meter is connected reversely specifically comprises: if the first phase line has no voltage, the second phase line has voltage, and the screen cannot be lighted by the key, it is determined that the first phase line and the second phase line are possibly connected reversely.

[0011] Preferably, it further comprises: determining the screen display voltage, and if the screen display voltage is zero, it is determined that the first phase line and the second phase line are connected reversely.

[0012] Preferably, the determination of whether the phase line of the electric meter is connected reversely specifically comprises: if the first phase line has voltage, the second phase line has no voltage, and the screen can be lighted by the key, it is determined that the first phase line and the second phase line are not connected reversely.

[0013] Preferably, it further comprises: determining the screen display voltage, and if the screen display voltage is the voltage of the first phase line, it is determined that the first phase line and the second phase line are not connected reversely.

[0014] Preferably, it further comprises: when the pull-out instruction is sent, the sending is performed through a wireless terminal connected to the single-phase electric energy meter, wherein the wireless terminal is at least one or more of Bluetooth, infrared, and communication cable.

[0015] In another aspect, a detection device for the phase line of the single-phase electric energy meter is also provided, which is used to implement the detection method for the phase line of the single-phase electric energy meter, and comprises,

[0016] a detection unit configured to acquire initial voltage data values of each phase line of the single-phase electric energy meter;

[0017] a control unit configured to send a pull-out instruction to the single-phase electric energy meter and acquire a pull-out execution result;

[0018] The detection unit is further configured to acquire voltage data values of each phase line after the pull-out operation when the pull-out execution is successful, and determine whether the screen can be lighted by the key; and determine whether the phase line of the electric meter is connected reversely according to the initial voltage data value, the voltage data value of each phase line after the pull-out operation, and the screen lighting condition.

[0019] Preferably, the detection unit is further configured to determine that the first phase line and the second phase line are possibly connected reversely if the first phase line has no voltage, the second phase line has voltage, and the screen cannot be lighted by the key.

[0020] The screen display voltage is determined, and if the screen display voltage is zero, it is determined that the first phase line and the second phase line are connected reversely.

[0021] Preferably, the detection unit is further configured to determine that the first phase line and the second phase line are not reversed if the first phase line has voltage, the second phase line has no voltage, and the screen can be lit up by pressing the button.

[0022] Preferably, the detection unit is further configured to determine the screen display voltage; if the screen display voltage is the voltage of the first phase line, then it is determined that the first phase line and the second phase line are not reversed.

[0023] In summary, implementing the embodiments of the present invention has the following beneficial effects:

[0024] This invention provides a method and device for detecting the phase wires of a single-phase electricity meter, enabling rapid and accurate determination of reversed wiring in single-phase meters. It has wide applications in power system metering and management, including but not limited to various electricity consumption scenarios such as homes, businesses, and industries. In home electricity use, by accurately identifying and correcting wiring errors in single-phase electricity meters, it ensures the accuracy and safety of household electricity use, improving the user experience. In the commercial and industrial sectors, it helps businesses optimize power resource allocation, reduce economic losses caused by inaccurate metering, improve overall electricity safety management, ensure stable meter operation, and reduce accidents such as water damage caused by wiring errors. This is of great significance for maintaining the stability of the power grid and ensuring electricity safety. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of the present invention.

[0026] Figure 1 This is a schematic diagram of the main process of a method for detecting the phase line input and output of a single-phase energy meter in an embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram of a detection device for the phase line input and output of a single-phase energy meter in an embodiment of the present invention. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] like Figure 1 The diagram shown is a schematic representation of an embodiment of a method for detecting the phase lines of a single-phase energy meter provided by the present invention. In this embodiment, the method includes the following steps:

[0030] Step S1, obtaining initial voltage data values of each phase line of the single-phase electric energy meter; it should be noted that the commonly used single-phase electric energy meter switch type in the current power grid is built-in switch and external switch, the built-in switch has a built-in relay inside, when the electric energy meter receives the command of pulling the switch, the built-in relay acts, so that the electric energy meter 1, 2 input line circuit is disconnected, thereby the electric energy meter is powered off; the external switch electric energy meter has no built-in relay inside, and needs to cooperate with the external switch to pull the switch; therefore, considering that part of the external switch electric energy meter is not equipped with external switch, it cannot pull the switch, therefore, this embodiment only considers the built-in single-phase electric energy meter, and does not consider the external single-phase electric energy meter.

[0031] Step S2, sending a pull switch command to the single-phase electric energy meter and obtaining the pull switch execution result, when the pull switch execution is successful, obtaining the voltage data values of each phase line after the pull switch, and determining whether the screen can be lighted by the key; it can be understood that there are several schemes for issuing the pull switch command to the electric energy meter at present; the first scheme is to issue the pull switch command through the master station, the command is issued to the collection device through the master station, and the collection device issues the pull switch command to the electric energy meter through 485 / power line carrier / micro-power wireless and the like. The second scheme is to issue the pull switch command to the electric energy meter through the local communication interface of the electric energy meter. The commonly used local communication interface of the electric energy meter in the specification of the South Grid 21 includes 485, Bluetooth, infrared and the like. The first pull switch command needs to be operated by the master station, and the pull switch command needs to be remotely issued, which may be affected by signal interference and the like, and the master station operator needs to communicate with the on-site personnel for confirmation, so the efficiency is low. In the second scheme, the 485 interface needs to be disassembled from the lead seal of the electric energy meter, and the 485 communication line is connected to the 485 port of the electric energy meter, which is complicated and variable; and the Bluetooth mode is less used; therefore, it is a more appropriate way to issue the pull switch command through the infrared of the electric energy meter.

[0032] In one embodiment, when the pull switch command is sent, it is sent through a wireless terminal connected to the single-phase electric energy meter, wherein the wireless terminal is at least one or more of Bluetooth, infrared and communication cable.

[0033] Step S3, determining whether the phase line of the electric energy meter is reversed according to the initial voltage data values, the voltage data values of each phase line after the pull switch, and the screen lightening condition. It can be understood that, taking the electric energy meter in the specification of the South Grid 21 as an example, the voltage value displayed on the screen is measured at the phase line 1 of the electric energy meter, so that the voltage value is displayed on the electric energy meter. If the phase line 2 of the single-phase electric energy meter has about 220V input, and the phase line 1 of the electric energy meter has no voltage input, at this time, the single-phase electric energy meter screen displays 0V voltage, and the screen cannot be lighted by the key. For the case that the input and output lines of the single-phase built-in electric energy meter are reversed, only the pull switch operation is needed, so that whether the phase lines 1 and 2 of the electric energy meter are reversed can be judged according to whether the screen can be lighted by the key and whether the screen displays a normal voltage value.

[0034] In one embodiment, the determining whether the phase lines of the electric meter are connected reversely specifically comprises: if the first phase line has no voltage, the second phase line has voltage, and the screen cannot be lighted by the key, it is determined that the first phase line and the second phase line are possibly connected reversely; the screen display voltage is determined, and if the screen display voltage is zero, it is determined that the first phase line and the second phase line are connected reversely. It can be understood that, after the incoming and outgoing lines of the single-phase electric meter are connected reversely, the single-phase electric meter is operated to pull the lever, the single-phase electric meter phase line 1 has no voltage, the phase line 2 has voltage, the electric meter screen cannot be lighted by the key, and the electric meter screen display voltage is 0.

[0035] In one embodiment, the determining whether the phase lines of the electric meter are connected reversely specifically comprises: if the first phase line has no voltage, the second phase line has voltage, and the screen cannot be lighted by the key, it is determined that the first phase line and the second phase line are possibly connected reversely; the screen display voltage is determined, and if the screen display voltage is zero, it is determined that the first phase line and the second phase line are connected reversely. It can be understood that, after the incoming and outgoing lines of the single-phase electric meter are connected reversely, the single-phase electric meter is operated to pull the lever, the single-phase electric meter phase line 1 has no voltage, the phase line 2 has voltage, the electric meter screen cannot be lighted by the key, and the electric meter screen display voltage is 0.

[0036] As shown in Figure 2 The embodiment of the present application also provides a detection device for incoming and outgoing lines of a single-phase electric energy meter, which is used for realizing the detection method for the incoming and outgoing lines of the single-phase electric energy meter, and comprises,

[0037] A detection unit is configured to acquire initial voltage data values of each phase line of the single-phase electric energy meter.

[0038] A control unit is configured to send a lever pulling instruction to the single-phase electric energy meter and acquire a lever pulling execution result.

[0039] The detection unit is further configured to acquire voltage data values of each phase line after the lever pulling when the lever pulling execution is successful, determine whether the screen can be lighted by the key, and determine whether the phase lines of the electric meter are connected reversely according to the initial voltage data values, the voltage data values of each phase line after the lever pulling, and the screen lighting condition.

[0040] In a specific embodiment, the detection unit is further configured to determine that the first phase line and the second phase line are possibly connected reversely if the first phase line has no voltage, the second phase line has voltage, and the screen cannot be lighted by the key; and determine that the first phase line and the second phase line are connected reversely if the screen display voltage is zero.

[0041] In a specific embodiment, the detection unit is further configured to determine that the first phase line and the second phase line are not connected reversely if the first phase line has voltage, the second phase line has no voltage, and the screen can be lighted by the key; and determine that the first phase line and the second phase line are not connected reversely if the screen display voltage is the voltage of the first phase line.

[0042] It should be noted that the device described in the above embodiment corresponds to the method described in the above embodiment, therefore, the part not described in detail in the device described in the above embodiment can be obtained by referring to the content of the method described in the above embodiment, which will not be described here.

[0043] In summary, the embodiments of the present application have the following beneficial effects:

[0044] The detection method and device for phase line in and out of the single-phase electric energy meter provided by the present application are widely used in the electric energy measurement and management field of the power system, including but not limited to each power consumption link such as household, business, industry, etc. In the aspect of household power consumption, by accurately identifying and correcting the wiring error of the single-phase electric energy meter, the accuracy and safety of household power consumption are guaranteed, and the experience of residents in power consumption is improved. In the business and industrial field, it helps enterprises to optimize the allocation of electric power resources, reduces economic losses caused by inaccurate measurement, improves the overall power consumption safety management level, ensures the stable operation of the electric energy meter, reduces accidents such as water damage caused by wiring errors, and has important significance for maintaining the stability of the power grid and the safety of power consumption.

[0045] The above only discloses the preferred embodiments of the present application, of course, cannot limit the scope of the right of the present application, therefore, the equivalent changes made according to the claims of the present application still belong to the scope covered by the present application.

Claims

1. A method for detecting the phase line in and out of a single-phase electric energy meter, characterized in that, The method comprises the following steps: acquiring initial voltage data values of each phase line of a single-phase electric energy meter; sending a pull-out instruction to the single-phase electric energy meter and acquiring a pull-out execution result, when the pull-out execution is successful, acquiring voltage data values of each phase line after the pull-out, and determining whether a screen can be lighted by a key; determining whether the phase lines of the electric energy meter are connected reversely according to the initial voltage data values, the voltage data values of each phase line after the pull-out, and screen lightening conditions; the determination of whether the phase lines of the electric energy meter are connected reversely specifically comprises: if there is no voltage in the first phase line, there is voltage in the second phase line, and the screen cannot be lighted by the key, it is determined that the first phase line and the second phase line are possibly connected reversely; if there is voltage in the first phase line, there is no voltage in the second phase line, and the screen can be lighted by the key, it is determined that the first phase line and the second phase line are not connected reversely; determining a screen display voltage, if the screen display voltage is zero, it is determined that the first phase line and the second phase line are connected reversely, and if the screen display voltage is the voltage of the first phase line, it is determined that the first phase line and the second phase line are not connected reversely.

2. The method of claim 1, wherein, When the pull-out instruction is sent, the sending is performed through a wireless terminal connected with the single-phase electric energy meter, wherein the wireless terminal is at least one or more of Bluetooth, infrared, and a communication cable.

3. A device for detecting the phase line entry / exit of a single-phase electricity meter, for implementing the method according to any one of claims 1-2, characterized in that, The method comprises the following steps: detecting a detection unit for acquiring initial voltage data values of each phase line of a single-phase electric energy meter; a control unit for sending a pull-out instruction to the single-phase electric energy meter and acquiring a pull-out execution result; the detection unit is also used for acquiring voltage data values of each phase line after the pull-out when the pull-out execution is successful, and determining whether a screen can be lighted by a key; and determining whether the phase lines of the electric energy meter are connected reversely according to the initial voltage data values, the voltage data values of each phase line after the pull-out, and screen lightening conditions; the detection unit is specifically used for: if there is no voltage in the first phase line, there is voltage in the second phase line, and the screen cannot be lighted by the key, it is determined that the first phase line and the second phase line are possibly connected reversely; if there is voltage in the first phase line, there is no voltage in the second phase line, and the screen can be lighted by the key, it is determined that the first phase line and the second phase line are not connected reversely; determining a screen display voltage, if the screen display voltage is zero, it is determined that the first phase line and the second phase line are connected reversely, and if the screen display voltage is the voltage of the first phase line, it is determined that the first phase line and the second phase line are not connected reversely.

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