A method and system for selecting and controlling the current transformer in an electricity meter.

Abstract

This invention discloses a method and system for selecting and controlling current transformers in an energy meter, relating to the field of power system technology. Its main objective is to solve the problem of high manpower consumption and poor accuracy in current energy meter transformer selection. The method includes: upon receiving a high-voltage current transformer start command, acquiring the transformer voltage information of the target transmission route and the initial winding position of the high-voltage current transformer; determining the initial current ratio of the high-voltage current transformer and sending a start command to the target high-voltage switch; acquiring the first real-time current value of the primary winding and the second real-time current value of the secondary winding recorded at the target winding position, and determining the position current ratio based on the first and second real-time current values; determining the target winding position matching the position current ratio and the initial current ratio according to the real-time current data in the target transmission route, generating a switch control command for the target winding position, and sending it to the target high-voltage switch.

Description

Technical Field

[0001] This invention relates to the field of power system technology, and in particular to a method and system for selecting and controlling the current transformer of an electricity meter. Background Technology

[0002] In power systems, current transformers for electricity meters include high-voltage current transformers installed on the external lines of the meter and low-voltage current transformers installed on the internal lines of the meter. These transformers ensure that the current in the transformer network is proportionally converted into a standard low or small current for measurement. Currently, the selection of both high-voltage and low-voltage current transformers is typically done manually. This involves professional technicians selecting transformers according to the current conversion requirements between high and low voltage, such as manually adjusting the winding positions within the transformer, treating different winding positions as separate transformers for different purposes. However, for high-voltage current transformers in large transformer installations, manual selection consumes significant manpower and resources and inevitably introduces human error. Therefore, a new method for selecting and controlling current transformers for electricity meters is urgently needed to address these issues. Summary of the Invention

[0003] In view of this, the present invention provides a method and system for selecting and controlling the current transformer of an electricity meter, the main purpose of which is to solve the problem that the selection of current transformers for existing electricity meters consumes a lot of manpower and has poor accuracy.

[0004] According to one aspect of the present invention, a method for selecting and controlling the current transformer of an electricity meter is provided, comprising:

[0005] Upon receiving the start command of the high-voltage current transformer, the transformer voltage information of the target transmission route and the initial winding position of the high-voltage current transformer are obtained.

[0006] The initial current ratio of the high-voltage current transformer is determined, and a start command is sent to the target high-voltage switch. The start command carries at least one target winding position, which is determined based on the transformer information and the initial winding position.

[0007] The first real-time current value of the primary winding and the second real-time current value of the secondary winding are obtained at the target winding position, and the position current ratio is determined based on the first real-time current value and the second real-time current value.

[0008] The target winding position that matches the position current ratio and the initial current ratio is determined according to the real-time current data in the target transmission route, and a switch control command for the target winding position is generated and sent to the target high-voltage switch so that the target high-voltage switch can complete a current transformer selection operation.

[0009] According to another aspect of the present invention, a current transformer selection control system for an electricity meter is provided, comprising:

[0010] Main control processor, target high-voltage switch, motor,

[0011] The main control processor, upon receiving a high-voltage current transformer start command, acquires the transformer voltage information of the target transmission route and the initial winding position of the high-voltage current transformer; determines the initial current ratio of the high-voltage current transformer and sends a start command to the target high-voltage switch, the start command carrying at least one target winding position, the target winding position being determined based on the transformer voltage information and the initial winding position; acquires a first real-time current value of the primary winding and a second real-time current value of the secondary winding recorded at the target winding position, and determines the position current ratio based on the first real-time current value and the second real-time current value; determines a target winding position matching the position current ratio and the initial current ratio according to the real-time current data in the target transmission route, generates a switch control command for the target winding position, and sends it to the target high-voltage switch to enable the target high-voltage switch to complete a primary transformer selection operation.

[0012] By employing the above-described technical solutions, the technical solutions provided by the embodiments of the present invention have at least the following advantages:

[0013] This invention provides a method and system for selecting and controlling current transformers in an energy meter. Compared with the prior art, in this embodiment, when the main control processor receives a start command for a high-voltage current transformer, it acquires the transformer voltage information of the target transmission route and the initial winding position of the high-voltage current transformer; determines the initial current ratio of the high-voltage current transformer, and sends a start command to the target high-voltage switch. The start command carries at least one target winding position, which is determined based on the transformer voltage information and the initial winding position; it acquires the first real-time current value of the primary winding and the second real-time current value of the secondary winding recorded at the target winding position, and based on... The first real-time current value and the second real-time current value determine the position current ratio; the target winding position matching the position current ratio and the initial current ratio is determined according to the real-time current data in the target transmission route, and a switch control command for the target winding position is generated and sent to the target high-voltage switch so that the target high-voltage switch completes a transformer selection operation. This realizes the selection of transformers with different current transformation effects based on the connection method between the coil position and the high-voltage switch, and achieves the purpose of automatic and unmanned transformer selection, greatly reducing the consumption of manpower and material resources, reducing the probability of error generation, and meeting the requirements for accurate transformer selection in complex environments in the power transmission network.

[0014] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0015] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0016] Figure 1 This invention provides a flowchart of a current transformer selection and control method for an energy meter according to an embodiment of the present invention.

[0017] Figure 2 A schematic diagram of a high-voltage switch connection structure provided by an embodiment of the present invention is shown;

[0018] Figure 3 This invention provides a schematic diagram of another high-voltage switch connection structure.

[0019] Figure 4 This diagram illustrates a structural schematic of a current transformer selection control for an energy meter according to an embodiment of the present invention. Detailed Implementation

[0020] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0021] This invention provides a method for selecting and controlling the current transformer in an energy meter, such as... Figure 1 As shown, the method includes:

[0022] 101. Upon receiving the start command of the high-voltage current transformer, obtain the transformer voltage information of the target transmission route and the initial winding position of the high-voltage current transformer.

[0023] In this embodiment of the invention, the current execution terminal, acting as the control terminal for selecting the current transformer of the energy meter, can be a main control processor. It collects relevant data from the current transformer on the energy meter detection circuit to execute steps 101-104. The current execution terminal can receive a start command triggered by the testing personnel to obtain the transformer voltage information on the target transmission route and the initial winding position of the high-voltage current transformer. At this time, the high-voltage current transformer is the external current transformer located on the energy meter on the transmission line. It adjusts the current on the target transmission line and inputs it to the energy meter for detection, ensuring the availability and safety of the energy meter. Furthermore, the target transmission route is a selected transmission line in the power transmission network. The transformer voltage information is used to characterize the specific current value and number of voltage transformations during voltage reduction or sound pressure reduction in the power transmission network; this embodiment of the invention does not impose specific limitations on this.

[0024] In another embodiment of the invention, for further definition and explanation, the step of obtaining the transformer information of the target transmission route and the initial winding position of the high-voltage current transformer includes:

[0025] Obtain the entered target transmission route and query the transformer information that matches the target transmission route;

[0026] The equipment image information of the high-voltage current transformer is obtained, and the available winding length is identified from the equipment image information using an image recognition model;

[0027] The initial winding position matching the available winding length is determined according to the preset winding length mapping relationship.

[0028] To achieve adaptive selection of coil positions in current transformers to obtain current transformers representing different inductance effects, the current execution terminal, when acquiring transformer information and initial winding positions, first obtains the target transmission route entered by the user through the main control processor. It then uses transformer information pre-written in the power grid list corresponding to different transmission routes. Specifically, the transformer information includes the number of current boost or deboost times and the boost or deboost voltage values ​​during current transmission on the target transmission line. This embodiment of the invention does not impose specific limitations on this information. Furthermore, in this embodiment, during the installation of the high-voltage current transformer, to ensure accurate installation and normal operation, the installer takes a picture of the installed current transformer's appearance as equipment image information for feature recognition. The image recognition model can be an image feature recognition model built based on a convolutional neural network to extract the available winding length from the high-voltage current transformer's instruction label in the equipment image information. In this case, a three-layer convolutional network can be trained in advance using equipment image samples marked with different available lengths to obtain an image recognition model for recognizing the available winding length. This embodiment of the invention does not impose specific limitations on this information.

[0029] It should be noted that, to avoid operational errors during the installation of various current transformers, this embodiment of the invention does not use the edge position of the coil as the initial winding position. Instead, a reference position is determined by the current execution terminal as the initial winding position. Specifically, the initial winding position matching the available winding length is determined according to a preset winding length mapping relationship (e.g., the winding connector corresponding to the initial winding position). That is, the preset winding length mapping relationship pre-configures initial winding positions matching different available winding lengths. Generally, current transformers of the same model have the same available length and the same initial winding position. This embodiment of the invention does not impose specific limitations.

[0030] 102. Determine the initial current ratio of the high-voltage current transformer and send a start command to the target high-voltage switch.

[0031] In this embodiment of the invention, the current transformer works primarily by converting high current into low current suitable for measurement and protection through electromagnetic induction. It is used not only to measure line current, power, and energy, but also to protect valuable equipment, motors, and transformers when line faults occur. The basic structure of the high-voltage current transformer includes a primary coil, a secondary coil, an iron core, and insulating material. Specifically, in the voltage transformer, the high-voltage winding is wound around the iron core, while the low-voltage winding is wound outside the high-voltage winding. The high-voltage winding corresponds to the primary coil, and the low-voltage winding corresponds to the secondary coil. When alternating current flows through the primary coil, a magnetic flux is generated in the iron core. This magnetic flux induces an electromotive force in the secondary coil, resulting in a low current output. The primary coil can be considered the primary side, and the secondary coil the secondary side. The current ratio between the two sides is then calculated as the current ratio. The initial current ratio is the initial current ratio of the transformer, preferably a pre-configured initial value. This embodiment of the invention does not impose specific limitations on this value. Furthermore, a start command is sent to the target high-voltage switch, which connects the winding terminals and switch terminals of the control high-voltage current transformer. At this time, the start command carries at least one target winding position. Since winding terminals are configured at different winding positions, corresponding to terminals that can be connected to the high-voltage switch, in this embodiment of the invention, a high-voltage switch with a single terminal can be selected, or a high-voltage switch containing multiple terminals can be selected (in this case, the switch has a processor for selecting the closed switch terminal based on the command). Figure 2 , 3 As shown. The target winding position is determined based on the transformer voltage information and the initial winding position. That is, the target winding position at this time is used to characterize the specific position where the winding terminals are connected to the switch terminals in order to obtain different current ratio effects.

[0032] In another embodiment of the invention, for further definition and explanation, before sending a start command to the target high-voltage switch, the method further includes:

[0033] The transformer level and transformer differential voltage in the transformer information are analyzed, and the available winding length of the high-voltage current transformer is obtained.

[0034] The target position corresponding to the transformer level and the transformer differential is determined based on the position proportionality coefficient, and the target winding position corresponding to the target position is determined according to the available winding length.

[0035] If the target winding position matches the position of maximum pressure consumption of the transformer differential, a start command is generated.

[0036] To flexibly and adaptably select the winding length in the current transformer, thereby enabling the selection of a suitable current transformer by closing the target high-voltage switch, the current execution end first parses the transformer level and voltage difference in the transformer information. Simultaneously, it uses an image recognition model to identify the available winding length from the acquired equipment image information. Then, a target position corresponding to the transformer level and voltage difference is determined according to a position proportionality coefficient. Here, the position proportionality coefficient characterizes the proportional relationship between the target position and the voltage. The target position corresponding to the transformer level and voltage difference is determined based on the position proportionality coefficient; this embodiment of the invention does not impose specific limitations. Furthermore, the determined target winding position is compared with the position of maximum voltage loss due to the voltage difference. Here, the position of maximum voltage loss characterizes the position corresponding to the maximum voltage drop or rise when the voltage difference is at its maximum. This can be pre-configured according to different voltage differences, so that when matching this maximum loss position, it indicates that the target winding position can safely and effectively guarantee the current conversion, thereby generating a start command; this embodiment of the invention does not impose specific limitations.

[0037] In another embodiment of the invention, for further definition and explanation, the steps of determining the target position corresponding to the transformer level and the transformer differential based on the position proportionality coefficient, and determining the target winding position corresponding to the target position according to the available winding length, include:

[0038] Obtain the position proportionality coefficient of the high-voltage current transformer;

[0039] Query the target location corresponding to the location ratio coefficient, the transformer level, and the transformer pressure difference according to the preset transformer distance mapping relationship; or,

[0040] The dynamic transformer distance relationship function is retrieved, and the target position corresponding to the position proportional coefficient, the transformer level, and the transformer pressure difference is calculated based on the dynamic transformer distance relationship function.

[0041] To accurately determine the target winding position as a basis for selecting the current transformer, the current execution terminal first obtains the position proportional coefficient of the configured high-voltage current transformer. Then, in a specific implementation scenario, it queries the target position corresponding to the position proportional coefficient, transformer level, and transformer voltage difference according to a preset transformer distance mapping relationship. At this time, the preset transformer distance mapping relationship stores the target positions corresponding to different position proportional coefficients, different transformer levels, and transformer voltage differences. This can be configured based on the transformer model and selection requirements to reflect the static displacement selection effect. This embodiment of the invention does not impose specific limitations. In another specific implementation scenario, the current execution terminal retrieves a dynamic transformer distance relationship function and calculates the target position corresponding to the position proportional coefficient, transformer level, and transformer voltage difference based on this function. Here, the dynamic transformer distance relationship function is used to characterize the dynamic proportional operation relationship between the target position and the position proportional coefficient, transformer level, and transformer voltage difference. Specifically, the dynamic transformer distance relationship function can be: where is the position proportional coefficient, is the transformer level, and is the transformer voltage difference. This embodiment of the invention does not impose specific limitations.

[0042] 103. Obtain the first real-time current value of the primary winding and the second real-time current value of the secondary winding at the target winding position, and determine the position current ratio based on the first real-time current value and the second real-time current value.

[0043] In this embodiment of the invention, after sending the start command, the current execution terminal records the current values ​​after the winding connectors are connected to the switching connectors of each target high-voltage switch in real time. This includes the first real-time current value of the primary winding and the second real-time current value of the secondary winding. The corresponding position current is determined by calculating the current ratio. Since multiple winding connectors can be configured on the winding coil to correspond to multiple current ratios, there are also multiple first real-time currents and second real-time currents collected. Multiple position current ratios are obtained by calculating the corresponding ratios. This embodiment of the invention does not impose specific limitations.

[0044] 104. Determine the target winding position that matches the position current ratio and the initial current ratio according to the real-time current data in the target transmission route, and generate a switch control command for the target winding position, and send it to the target high-voltage switch so that the target high-voltage switch can complete a current transformer selection operation.

[0045] In this embodiment of the invention, after determining the position current ratio, the current execution terminal acquires real-time current data in the target transmission route, which can be obtained through setting methods and acquisition methods from the transmission front end, in order to determine the target winding position corresponding to this position current ratio and the initial current ratio. Wherein, after the target winding position is connected to the high-voltage switch, the current ratio exhibited by the current transformer in the transmission network is different, and the corresponding voltage drop effect is also different, thus achieving the selection purpose. Simultaneously, after determining the target winding position, in order to achieve the effect of automated control, the current execution terminal generates a switch control command to send to the high-voltage switch, driving the switch to close, so that the corresponding transmission line connector is connected, completing the selection of the current transformer.

[0046] In this embodiment of the invention, the main control processor, acting as the current execution end, executes steps 101-104 and electrically connects to the target high-voltage switch to open and close the target high-voltage switch, thereby connecting the switch connector to the winding connector. Figure 2 As shown, at this point, the wires of the winding terminals and the switching terminals of the high-voltage switch are respectively connected to the power transmission network, thus obtaining current transformers with different current ratios. The high-voltage current transformer is a multi-tap current transformer; that is, one winding remains unchanged, but multiple terminals are added to the coils during the firing of the second winding. These terminals are connected to the switching terminals of the high-voltage switch to obtain current transformers with different current ratios without requiring changes to the current transformer equipment, thus enabling diverse selection of current transformers.

[0047] In another embodiment of the invention, for further definition and explanation, the step of determining the target winding position matching the position current ratio and the initial current ratio according to the real-time current data in the target transmission route includes:

[0048] Determine the ratio of the real-time current data to the rated winding current, and calculate the average value based on the current ratio, the position current ratio, and the initial current ratio;

[0049] The target winding position is determined from the available winding length based on the calculated average value.

[0050] Because this embodiment of the invention uses an adaptive method to select an effective and matching winding position to form a corresponding current transformer, it improves the automation and controllability of the current transformer selection. The current execution end first uses the ratio of the collected real-time current data to the rated winding current as the current ratio. At this time, the real-time current data is preferably the second real-time current data from the secondary side. Then, the average value is calculated using the current ratio, the position current ratio, and the initial current ratio. That is, the average current ratio is used as the current ratio to calculate the target winding position corresponding to the secondary winding in reverse.

[0051] It should be noted that, since the switching terminals of the target high-voltage switch in this embodiment of the invention correspond to the winding terminals of the upper coil on the secondary side, that is, the current conversion effect of the current transformer is selected by adjusting the current current on the secondary side, the target winding position corresponding to the average current can be calculated in reverse by using the relationship between the current ratio and the coil position ratio. This embodiment of the invention does not make specific limitations.

[0052] In another embodiment of the invention, for further definition and explanation, after the step is sent to the target high-voltage switch, the method further includes:

[0053] After the connection of the target high-voltage switch to the winding connection is closed, and a change in the transformer voltage information is detected, the updated target winding position is regenerated based on the updated transformer voltage information and the initial winding position, so as to re-execute the step of determining the target winding position of the high-voltage current transformer.

[0054] To achieve automatic and closed-loop selection of current transformers and ensure their effectiveness in complex power grids, the current execution terminal also monitors changes in transformer voltage information in real time. For example, it checks whether the number of transformer cycles has increased or decreased, and the voltage difference has increased or decreased. This embodiment of the invention does not impose specific limitations on these changes. Specifically, the current execution terminal connects the target high-voltage switch's switch terminal to the winding terminal at the target winding position. Simultaneously, when a change in transformer voltage information is detected, it indicates a change in voltage fluctuations in the transmission network. Therefore, the current execution terminal regenerates the updated target winding position based on the updated transformer voltage information and the initial winding position, thus re-executing the target winding position determination step for the high-voltage current transformer and completing a new round of transformer selection control.

[0055] This invention provides a method for selecting and controlling the current transformer in an electricity meter. Compared with existing technologies, in this embodiment, when the main control processor receives a start command for a high-voltage current transformer, it acquires the transformer voltage information of the target transmission route and the initial winding position of the high-voltage current transformer; determines the initial current ratio of the high-voltage current transformer; and sends a start command to the target high-voltage switch. The start command carries at least one target winding position, which is determined based on the transformer voltage information and the initial winding position. It then acquires the first real-time current value of the primary winding and the second real-time current value of the secondary winding recorded at the target winding position. The system determines the position current ratio based on the first real-time current value and the second real-time current value; it determines the target winding position that matches the position current ratio and the initial current ratio according to the real-time current data in the target transmission route, and generates a switch control command for the target winding position, which is sent to the target high-voltage switch so that the target high-voltage switch can complete a transformer selection operation. This achieves the selection of transformers with different current transformation effects based on coil position movement, and realizes the purpose of automatic and unmanned transformer selection, greatly reducing the consumption of manpower and material resources, reducing the probability of error generation, and meeting the requirements for accurate transformer selection in complex environments in power transmission networks.

[0056] Furthermore, as a response to the above Figure 1 The implementation of the method shown in this invention provides a current transformer selection and control system for an energy meter, as described in this embodiment. Figure 4 As shown, the system includes:

[0057] Main control processor 21, target high-voltage switch 22,

[0058] The main control processor, upon receiving a high-voltage current transformer start command, acquires the transformer voltage information of the target transmission route and the initial winding position of the high-voltage current transformer; determines the initial current ratio of the high-voltage current transformer and sends a start command to the target high-voltage switch, the start command carrying at least one target winding position, the target winding position being determined based on the transformer voltage information and the initial winding position; acquires a first real-time current value of the primary winding and a second real-time current value of the secondary winding recorded at the target winding position, and determines the position current ratio based on the first real-time current value and the second real-time current value; determines a target winding position matching the position current ratio and the initial current ratio according to the real-time current data in the target transmission route, generates a switch control command for the target winding position, and sends it to the target high-voltage switch to enable the target high-voltage switch to complete a primary transformer selection operation.

[0059] This invention provides a method and system for selecting and controlling current transformers in an energy meter. Compared with the prior art, in this embodiment, when the main control processor receives a start command for a high-voltage current transformer, it acquires the transformer voltage information of the target transmission route and the initial winding position of the high-voltage current transformer; determines the initial current ratio of the high-voltage current transformer; and sends a start command to the target high-voltage switch. The start command carries at least one target winding position, which is determined based on the transformer voltage information and the initial winding position. It also acquires the first real-time current value of the primary winding and the second real-time current value of the secondary winding recorded at the target winding position. The system calculates the current value and determines the position current ratio based on the first real-time current value and the second real-time current value; it determines the target winding position that matches the position current ratio and the initial current ratio according to the real-time current data in the target transmission route, and generates a switch control command for the target winding position, which is sent to the target high-voltage switch so that the target high-voltage switch can complete a transformer selection operation. This achieves the selection of transformers with different current transformation effects based on the movement of the coil position, and realizes the purpose of automatic and unmanned transformer selection, which greatly reduces the consumption of manpower and material resources, reduces the probability of error generation, and meets the requirements for accurate transformer selection in complex environments in the power transmission network.

[0060] It is obvious to those skilled in the art that the modules or steps of the present invention described above can be implemented using general-purpose computing systems. They can be centralized on a single computing system or distributed across a network of multiple computing systems. Optionally, they can be implemented using program code executable by a computing system, thereby storing them in a storage system for execution by the computing system. In some cases, the steps shown or described can be performed in a different order than those presented herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for selecting and controlling the current transformer in an electricity meter, characterized in that, include: Upon receiving the start command of the high-voltage current transformer, the transformer voltage information of the target transmission route and the initial winding position of the high-voltage current transformer are obtained. The initial current ratio of the high-voltage current transformer is determined, and a start command is sent to the target high-voltage switch. The start command carries at least one target winding position, which is determined based on the transformer information and the initial winding position. The first real-time current value of the primary winding and the second real-time current value of the secondary winding are obtained at the target winding position, and the position current ratio is determined based on the first real-time current value and the second real-time current value. The target winding position is determined according to the real-time current data in the target transmission route, which matches the position current ratio and the initial current ratio. A switch control command for the target winding position is generated and sent to the target high-voltage switch so that the target high-voltage switch can complete a transformer selection operation. The winding positions are equipped with winding connectors, which correspond to connectors that can be connected to the high-voltage switch.

2. The method according to claim 1, characterized in that, Before sending the start command to the target high-voltage switch, the method further includes: The transformer level and transformer differential voltage in the transformer information are analyzed, and the available winding length of the high-voltage current transformer is obtained. The target position corresponding to the transformer level and the transformer differential is determined based on the position proportionality coefficient, and the target winding position corresponding to the target position is determined according to the available winding length. If the target winding position matches the position of maximum pressure consumption of the transformer differential, a start command is generated.

3. The method according to claim 2, characterized in that, The step of determining the target position corresponding to the transformer level and the transformer differential based on the position proportionality coefficient, and determining the target winding position corresponding to the target position according to the available winding length, includes: Obtain the position proportionality coefficient of the high-voltage current transformer; The target location corresponding to the location ratio coefficient, the transformer level, and the transformer pressure difference is queried according to a preset transformer distance mapping relationship. The preset transformer distance mapping relationship stores the target locations corresponding to different location ratio coefficients, different transformer levels, and transformer pressure differences; or, The dynamic pressure change distance relationship function is retrieved, and the target position corresponding to the position proportional coefficient, the pressure level, and the pressure difference is calculated based on the dynamic pressure change distance relationship function. The dynamic pressure change distance relationship function is used to characterize the dynamic proportional operation relationship between the target position and the position proportional coefficient, the pressure level, and the pressure difference.

4. The method according to claim 1, characterized in that, Determining the target winding position that matches the position current ratio and the initial current ratio based on the real-time current data in the target transmission route includes: Determine the ratio of the real-time current data to the rated winding current, and calculate the average value based on the current ratio, the position current ratio, and the initial current ratio; The target winding position is determined from the available winding length based on the calculated average value.

5. The method according to claim 1, characterized in that, The acquisition of the transformer voltage information of the target transmission route and the initial winding position of the high-voltage current transformer includes: Obtain the entered target transmission route and query the transformer information that matches the target transmission route; The equipment image information of the high-voltage current transformer is obtained, and the available winding length is identified from the equipment image information using an image recognition model; The initial winding position matching the available winding length is determined according to the preset winding length mapping relationship.

6. The method according to claim 1, characterized in that, After the transmission is sent to the target high-voltage switch, the method further includes: After the connection of the target high-voltage switch to the winding connection is closed, and a change in the transformer voltage information is detected, the updated target winding position is regenerated based on the updated transformer voltage information and the initial winding position, so as to re-execute the step of determining the target winding position of the high-voltage current transformer.

7. A current transformer selection and control system for an electricity meter, characterized in that, include: Main control processor, target high-voltage switch, The main control processor is configured to, upon receiving a start command for a high-voltage current transformer, acquire the transformer voltage information of the target transmission route and the initial winding position of the high-voltage current transformer; determine the initial current ratio of the high-voltage current transformer; and send a start command to the target high-voltage switch, wherein the start command carries at least one target winding position, the target winding position being determined based on the transformer voltage information and the initial winding position; acquire a first real-time current value of the primary winding and a second real-time current value of the secondary winding recorded at the target winding position; and determine the position current ratio based on the first real-time current value and the second real-time current value. The target winding position is determined according to the real-time current data in the target transmission route, which matches the position current ratio and the initial current ratio. A switch control command for the target winding position is generated and sent to the target high-voltage switch so that the target high-voltage switch can complete a transformer selection operation. The winding positions are equipped with winding connectors, which correspond to connectors that can be connected to the high-voltage switch.

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