Method and device for detecting incoming and outgoing lines of phase lines of single-phase electric energy meter

Abstract

The invention provides a method and device for detecting incoming and outgoing lines of phase lines of a single-phase electric energy meter, and the method comprises the steps: obtaining an initial voltage data value of each phase line of the single-phase electric energy meter; sending a switch-out instruction to the single-phase electric energy meter and obtaining a switch-out execution result, obtaining a voltage data value of each phase line after switch-out after switch-out is successful, and determining whether a screen can be lightened through a key; and determining whether the phase lines of the electricity meter are reversely connected according to the initial voltage data value, the voltage data value of each phase line after switching-off and the screen lightening condition. The method can quickly and accurately judge the reverse connection of the incoming and outgoing lines of the single-phase ammeter, ensures the stable operation of the ammeter, reduces the accidents such as water immersion damage caused by wrong wiring, and is of great significance for maintaining the stability of a power grid and the safety of electricity utilization.

Description

Technical Field

[0001] The present invention relates to the field of electric power technology, and in particular to a method and a device for detecting an inlet and outlet line of a phase line of a single-phase electric energy meter. Background Art

[0002] In the operation of the power system, the accuracy and reliability of the electric energy metering device are of vital importance. It is not only related to the economic interests of the power company, but also directly affects the legitimate rights and interests of the majority of electricity users and the safety of electricity use. As one of the most common electric energy metering devices, the single-phase electric energy meter is widely used in the electric energy metering of households, businesses and various industrial users. However, in actual applications, the wiring errors of single-phase electric energy meters often occur, especially the phenomenon of reverse connection of the phase line input and output lines. This problem has become a major challenge in the management of electric energy metering devices.

[0003] The phenomenon of reverse connection of phase input and output lines is often caused by improper operation, negligence and other human factors during the construction or maintenance of power facilities. Wiring errors not only lead to inaccurate energy metering, but also may cause voltage instability, wire overload, short circuit and other safety hazards, posing a serious threat to the stable operation of the power grid and the safety of electricity use. For example, in some areas, when floods occur due to natural disasters such as typhoons and heavy rains, water damage accidents of energy meters occur frequently, partly because of the reduced waterproof performance due to wiring errors.

[0004] The traditional method of checking the connection of electric energy meters mainly relies on manual inspection one by one, which is labor-intensive, inefficient and error-prone. With the development of smart grid technology and the continuous expansion of the scale of power systems, this traditional verification method can no longer meet the needs of efficient and accurate management. Therefore, researching and developing a scientific and efficient method for checking the reverse connection of the phase line input and output of single-phase electric energy meters has become an urgent problem to be solved in the power industry. Therefore, it is very important to quickly and accurately determine whether the input and output lines of single-phase electric energy meters are reversed. Summary of the invention

[0005] The purpose of the present invention is to provide a method and device for detecting the input and output lines of a single-phase electric energy meter, so as to solve the technical problem of how to quickly and accurately determine whether the input and output lines of a single-phase electric energy meter are connected in reverse.

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

[0007] Obtain the initial voltage data value of each phase line of the single-phase electric energy meter;

[0008] Sending a power-off instruction to the single-phase electric energy meter and obtaining a power-off execution result, when the power-off execution is successful, obtaining the voltage data value of each phase line after the power-off, and determining whether the screen can be lit by pressing a button;

[0009] Determine whether the phase line of the meter is connected reversely based on the initial voltage data value, the voltage data value of each phase line after the power is turned off, and the screen lighting condition.

[0010] Preferably, the determining whether the phase lines of the electric meter are connected reversely specifically includes: if the first phase line has no voltage, the second phase line has voltage, and the screen cannot be lit by pressing a button, then it is determined that the first phase line and the second phase line may be connected reversely.

[0011] Preferably, the method further includes determining a screen display voltage, and if the screen display voltage is zero, determining that the first phase line and the second phase line are connected reversely.

[0012] Preferably, the determining whether the phase lines of the electric meter are connected reversely specifically includes: if there is voltage on the first phase line and no voltage on the second phase line, and the screen can be lit up by pressing a button, then it is determined that the first phase line and the second phase line are not connected reversely.

[0013] Preferably, the method further includes determining a screen display voltage, and if the screen display voltage is the voltage of the first phase line, determining that the first phase line and the second phase line are not connected reversely.

[0014] Preferably, it also includes that when sending the power-off instruction, it is sent through a wireless terminal connected to the single-phase electric energy meter, wherein the wireless terminal is at least through one or more of Bluetooth, infrared and communication cable.

[0015] On the other hand, a detection device for the phase line inlet and outlet of a single-phase electric energy meter is also provided, which is used to implement the detection method for the phase line inlet and outlet of a single-phase electric energy meter, comprising:

[0016] A detection unit, used to obtain the initial voltage data value of each phase line of the single-phase electric energy meter;

[0017] A control unit, used for sending a power-off instruction to the single-phase electric energy meter and obtaining a power-off execution result;

[0018] The detection unit is also used to obtain the voltage data value of each phase line after the power-off is successfully executed, and determine whether the screen can be lit by pressing a button; and determine whether the phase line of the meter is connected reversely based on the initial voltage data value, the voltage data value of each phase line after the power-off and the screen lighting condition.

[0019] Preferably, the detection unit is further used to determine that the first phase line and the second phase line may be connected reversely if there is no voltage on the first phase line, there is voltage on the second phase line, and the screen cannot be lit by pressing a button;

[0020] Determine the 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.

[0021] Preferably, the detection unit is further used to determine that the first phase line and the second phase line are not connected reversely if there is voltage on the first phase line and there is no voltage on the second phase line, and the screen can be lit up by pressing a button.

[0022] Preferably, the detection unit is further used to determine 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.

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

[0024] The detection method and device for the phase line input and output of a single-phase electric energy meter provided by the present invention can quickly and accurately determine whether the input and output lines of a single-phase electric energy meter are connected in reverse, and is widely used in the field of electric energy metering and management of electric power systems, including but not limited to various electricity consumption links such as households, commerce, and industry. In terms of household electricity consumption, by accurately identifying and correcting the wiring errors of single-phase electric energy meters, the accuracy and safety of household electricity consumption are guaranteed, and the residents' electricity consumption experience is improved. In the commercial and industrial fields, it helps enterprises optimize the allocation of power resources and reduce economic losses caused by inaccurate metering. At the same time, it improves the overall level of electricity safety management, ensures the stable operation of electric energy meters, and reduces accidents such as water damage caused by wiring errors. It is of great significance to maintaining the stability of the power grid and electricity safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

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

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

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

[0029] like Figure 1 FIG. 1 is a schematic diagram of an embodiment of a method for detecting the phase line inlet and outlet of a single-phase electric energy meter provided by the present invention. In this embodiment, the method includes the following steps:

[0030] Step S1, obtain the initial voltage data value of each phase line of the single-phase electric energy meter; it should be noted that the switch types of single-phase electric energy meters commonly used in the current power grid are built-in switches and external switches. The electric meter with a built-in switch has a built-in relay inside. When the electric meter receives a power-off command, the built-in relay is activated to disconnect the incoming line circuits of the electric meters 1 and 2, thereby cutting off the power to the electric meter; the electric meter with an external switch has no built-in relay inside and needs to be switched on with an external switch; therefore, considering that some electric energy meters with external switches do not have a matching external switch and cannot be switched off, this embodiment only considers single-phase electric meters with built-in switches, and does not consider single-phase electric meters with external switches.

[0031] Step S2, sending a power-off command to the single-phase electric energy meter and obtaining the power-off execution result. When the power-off is successfully executed, the voltage data value of each phase line after the power-off is obtained, and it is determined whether the screen can be lit by the button. Understandably, there are several common schemes for sending the power-off command to the electric meter. The first is to send the power-off command through the master station, and the command is sent to the collection equipment through the master station. The collection equipment sends the power-off command to the electric meter through 485 / power line carrier / micro-power wireless and other methods. The second is to send the power-off command to the electric meter through the local communication interface of the electric meter. The commonly used local communication interfaces of the electric meter specified in the Southern Power Grid 21 are 485, Bluetooth, infrared, etc. The first power-off command needs to be operated by the master station, and the power-off command needs to be remote, which may be affected by factors such as signal interference. The master station operator and the on-site personnel need to communicate and confirm, which is inefficient. In the second solution, the 485 interface needs to remove the meter seal and connect the 485 communication line to the 485 port of the meter. The operation is cumbersome and unchanged. The Bluetooth method is rarely used. Therefore, sending the power-off command through the meter infrared is a more appropriate way.

[0032] In one embodiment, when sending a power-off instruction, it is sent via a wireless terminal connected to the single-phase electric energy meter, wherein the wireless terminal is at least via one or more of Bluetooth, infrared and communication cable.

[0033] Step S3, determine whether the meter phase line is connected in reverse according to the initial voltage data value, the voltage data value of each phase line after the power is turned off, and the screen lighting condition. It can be understood that, taking the 21 standard meter as an example, the voltage value displayed on the screen is the voltage value displayed on the meter by measuring the voltage at the meter phase line 1. If the single-phase meter phase line 2 has a meter input of about 220V, and the meter phase line 1 has no voltage input, the single-phase meter screen displays a voltage of 0V at this time, and the screen cannot be lit up by the meter button. In the case where the input and output lines of the single-phase built-in meter are connected in reverse, it is only necessary to turn off the power of the meter, and the meter phase lines 1 and 2 can be judged whether they are connected in reverse by whether the screen can be lit by the button and whether the screen displays a normal voltage value.

[0034] In one embodiment, the determination of whether the phase line of the electric meter is connected in reverse specifically includes: if the first phase line has no voltage, the second phase line has voltage, and the screen cannot be lit up by pressing a button, then it is determined that the first phase line and the second phase line may be connected in reverse; and the screen display voltage is determined. If the screen display voltage is zero, then it is determined that the first phase line and the second phase line are connected in reverse. It is understandable that when the input and output lines of the phase lines 1 and 2 of the single-phase electric meter are connected in reverse, the single-phase electric meter is disconnected, the phase line 1 of the single-phase electric meter has no voltage, the phase line 2 has voltage, the electric meter screen cannot be lit up by pressing a button, and the electric meter screen displays a voltage of 0.

[0035] In one embodiment, the determination of whether the phase line of the electric meter is connected in reverse specifically includes: if the first phase line has voltage and the second phase line has no voltage, and the screen can be lit up by pressing a button, it is determined that the first phase line and the second phase line are not connected in reverse. Determine the screen display voltage, 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 in reverse. It is understandable that when the phase lines 1 and 2 of the single-phase electric meter are not connected in reverse, the single-phase electric meter is disconnected, the single-phase electric meter phase line 1 has voltage, the phase line 2 has no voltage, the electric meter screen can be lit up by pressing a button, and the voltage displayed on the electric meter screen is the input voltage of phase line 1.

[0036] like Figure 2 As shown, an embodiment of the present invention further provides a detection device for the phase line inlet and outlet of a single-phase electric energy meter, which is used to implement the detection method for the phase line inlet and outlet of a single-phase electric energy meter, comprising:

[0037] A detection unit, used to obtain the initial voltage data value of each phase line of the single-phase electric energy meter;

[0038] A control unit, used for sending a power-off instruction to the single-phase electric energy meter and obtaining a power-off execution result;

[0039] The detection unit is also used to obtain the voltage data value of each phase line after the power-off is successfully executed, and determine whether the screen can be lit by pressing a button; and determine whether the phase line of the meter is connected reversely based on the initial voltage data value, the voltage data value of each phase line after the power-off and the screen lighting condition.

[0040] In a specific embodiment, the detection unit is also used to determine that the first phase line and the second phase line may be connected reversely if there is no voltage on the first phase line, there is voltage on the second phase line, and the screen cannot be lit up by pressing a button; determine the screen display voltage, and if the screen display voltage is zero, determine that the first phase line and the second phase line are connected reversely.

[0041] In a specific embodiment, the detection unit is further used to determine that the first phase line and the second phase line are not connected reversely if there is voltage on the first phase line and no voltage on the second phase line, and the screen can be lit up by pressing a button. Determine the screen display voltage, and if the screen display voltage is the voltage of the first phase line, determine that the first phase line and the second phase line are not connected reversely.

[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 of the device described in the above embodiment that is not described in detail can be obtained by referring to the content of the method described in the above embodiment, and will not be repeated here.

[0043] In summary, the implementation of the embodiments of the present invention has the following beneficial effects:

[0044] The detection method and device for the phase line input and output of a single-phase electric energy meter provided by the present invention are widely used in the field of electric energy metering and management of electric power systems, including but not limited to various electricity consumption links such as households, commerce, and industry. In terms of household electricity consumption, by accurately identifying and correcting the wiring errors of single-phase electric energy meters, the accuracy and safety of household electricity consumption are guaranteed, and the residents' electricity consumption experience is improved. In the commercial and industrial fields, it helps enterprises optimize the allocation of power resources and reduce economic losses caused by inaccurate metering. At the same time, it improves the overall level of electricity safety management, ensures the stable operation of electric energy meters, and reduces accidents such as water damage caused by wiring errors. It is of great significance to maintain the stability of the power grid and the safety of electricity use.

[0045] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A method for detecting the phase line inlet and outlet of a single-phase electric energy meter, characterized in that: include: Obtain the initial voltage data value of each phase line of the single-phase electric energy meter; Sending a power-off instruction to the single-phase electric energy meter and obtaining a power-off execution result, when the power-off execution is successful, obtaining the voltage data value of each phase line after the power-off, and determining whether the screen can be lit by pressing a button; Determine whether the phase line of the meter is connected reversely based on the initial voltage data value, the voltage data value of each phase line after the power is turned off, and the screen lighting condition.

2. The method according to claim 1, characterized in that The determining whether the phase line of the electric meter is connected in reverse specifically includes: if the first phase line has no voltage, the second phase line has voltage, and the screen cannot be lit by pressing a button, then it is determined that the first phase line and the second phase line may be connected in reverse.

3. The method according to claim 2, characterized in that The method also includes determining a screen display voltage, and if the screen display voltage is zero, determining that the first phase line and the second phase line are connected reversely.

4. The method according to claim 1, characterized in that The determining whether the phase line of the electric meter is connected reversely specifically includes: if the first phase line has voltage, the second phase line has no voltage, and the screen can be lit by pressing a button, then it is determined that the first phase line and the second phase line are not connected reversely.

5. The method according to claim 4, characterized in that The method further includes determining a screen display voltage, and if the screen display voltage is the voltage of the first phase line, determining that the first phase line and the second phase line are not connected reversely.

6. The method according to claim 1, characterized in that It also includes that when sending a power-off instruction, 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.

7. A detection device for the phase line inlet and outlet of a single-phase electric energy meter, used to implement the method according to any one of claims 1 to 6, characterized in that: include, A detection unit, used to obtain the initial voltage data value of each phase line of the single-phase electric energy meter; A control unit, used for sending a power-off instruction to the single-phase electric energy meter and obtaining a power-off execution result; The detection unit is also used to obtain the voltage data value of each phase line after the power-off is successfully executed, and determine whether the screen can be lit by pressing a button; and determine whether the phase line of the meter is connected reversely based on the initial voltage data value, the voltage data value of each phase line after the power-off and the screen lighting condition.

8. The detection device according to claim 7, characterized in that: The detection unit is further used to determine that the first phase line and the second phase line may be connected in reverse if there is no voltage on the first phase line, there is voltage on the second phase line, and the screen cannot be lit by pressing a button; Determine the 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.

9. The detection device according to claim 7, characterized in that: The detection unit is also used to determine that the first phase line and the second phase line are not connected reversely if there is voltage on the first phase line and no voltage on the second phase line, and the screen can be lit up by pressing a button.

10. The detection device according to claim 9, characterized in that: The detection unit is further used to determine 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.

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