Mutual inductor selection control method and system of electric energy meter

Abstract

The invention discloses a mutual inductor selection control method and system of an electric energy meter, relates to the technical field of electric power systems, and mainly aims to solve the problems that mutual inductor selection of an existing electric energy meter consumes a large amount of manpower and is poor in accuracy. Comprising the steps that after a high-voltage current transformer starting instruction is received, variable voltage electric information of a target transmission line and the initial winding position of a high-voltage current transformer are acquired; the initial current ratio of the high-voltage current transformer is determined, and a starting instruction is sent to the target high-voltage switch; obtaining a first real-time current value of the primary side winding and a second real-time current value of the secondary side winding recorded at the target winding position, and determining a position current ratio based on the first real-time current value and the second real-time current value; and determining a target winding position matched with the position current ratio and the initial current ratio according to the real-time current data in the target transmission line, generating a switch control instruction of the target winding position, and sending the switch control instruction to the target high-voltage switch.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power systems, and in particular to a method and system for selecting and controlling a mutual inductor of an electric energy meter. Background Art

[0002] In the power system, the transformer of the electric energy meter includes a high-voltage current transformer installed in the external circuit of the electric energy meter, and a low-voltage transformer in the internal circuit of the electric energy meter, so as to ensure that the current or current in the transformer grid is proportionally converted into a standard low current or small current for measurement. At present, the selection of high-voltage current transformers or low-voltage transformers is usually manually selected, that is, professional and technical personnel select them according to the high-voltage and low-voltage current conversion requirements, such as manually adjusting the winding position in the transformer, and using different winding positions as a separate transformer to achieve the selection purpose. However, for high-voltage current transformers in large-scale transformer devices, manual participation in the selection of transformers will consume a lot of manpower and material resources, and will inevitably bring some human errors. Therefore, there is an urgent need for a transformer selection control method for electric energy meters to solve the above problems. Summary of the invention

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

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

[0005] After receiving the high-voltage current transformer start-up instruction, obtaining the transformer information of the target transmission route and the initial winding position of the high-voltage current transformer;

[0006] Determine an initial current ratio of the high-voltage current transformer, and send a start instruction to a target high-voltage electrical switch, wherein the start instruction carries at least one target winding position, and the target winding position is determined based on the transformer information and the initial winding position;

[0007] 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 a position current ratio based on the first real-time current value and the second real-time current value;

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

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

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

[0011] The main control processor is used to obtain the transformer electrical information of the target transmission route and the initial winding position of the high-voltage current transformer after receiving the high-voltage current transformer start-up instruction; determine the initial current ratio of the high-voltage current transformer, and send a start-up instruction to the target high-voltage electric switch, wherein the start-up instruction carries at least one target winding position, and the target winding position is determined based on the transformer electrical information and the initial winding position; obtain 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 determine the position current ratio based on the first real-time current value and the second real-time current value; 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 instruction for the target winding position, and send it to the target high-voltage electric switch, so that the target high-voltage electric switch completes a transformer selection operation.

[0012] By means of the above technical solution, the technical solution provided by the embodiment of the present invention has at least the following advantages:

[0013] The present invention provides a method and system for selecting and controlling a transformer of an electric energy meter. Compared with the prior art, the embodiment of the present invention obtains the transformer information of the target transmission route and the initial winding position of the high-voltage current transformer through a main control processor after receiving a start-up instruction of a high-voltage current transformer; determines the initial current ratio of the high-voltage current transformer, and sends a start-up instruction to a target high-voltage electric switch, wherein the start-up instruction carries at least one target winding position, and the target winding position is determined based on the transformer information and the initial winding position; obtains a first real-time current value of a primary winding and a second real-time current value of a 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; 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 instruction for the target winding position, and send it to the target high-voltage electric switch, so that the target high-voltage electric switch completes a transformer selection operation, realizes the selection of transformers with different current conversion effects based on the coil position and the connection method of the high-voltage electric switch, and realizes the purpose of automatic and unmanned transformer selection, greatly reduces manpower and material resources consumption, reduces the probability of error generation, and meets the transformer accuracy selection requirements in complex environments in power transmission networks.

[0014] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0016] Figure 1 A flow chart of a method for selecting and controlling a mutual inductor of an electric energy meter provided by an embodiment of the present invention is shown;

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

[0018] Figure 3 Another schematic diagram of a high-voltage switch access structure provided by an embodiment of the present invention is shown;

[0019] Figure 4 A schematic diagram of the structure of a transformer selection control of an electric energy meter provided by an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0020] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0021] The embodiment of the present invention provides a method for selecting and controlling a mutual inductor of an electric energy meter, such as Figure 1 As shown, the method includes:

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

[0023] In the embodiment of the present invention, the current execution end, as the control end for selecting the transformer of the electric energy meter, can be the main control processor, collect relevant data of the transformer on the detection circuit of the electric energy meter to execute the contents of steps 101-104. Among them, the current execution end can receive the start instruction triggered by the detection personnel to obtain the transformer 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 transformer outside the electric energy meter on the transmission line, so as to adjust the current on the target transmission line and input it into the electric energy meter for detection, so as to ensure the availability and safety of the electric energy meter. In addition, the target transmission route is a transmission line selected in the transmission network, and the transformer information is used to characterize the specific current value and the number of transformers for the voltage reduction or sound pressure of the electric energy in the transmission network, which is not specifically limited in the embodiment of the present invention.

[0024] In another embodiment of the present 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] Obtaining the entered target transmission route, and querying the transformer information matching the target transmission route;

[0026] Acquire device image information of the high-voltage current transformer, and identify the available length of the winding from the device image information through an image recognition model;

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

[0028] In order to realize the adaptive selection of the coil position in the current transformer to obtain a current transformer representing different mutual inductance effects, when the current execution end obtains the transformer information and the initial winding position, it first obtains the target transmission route entered by the user through the main control processor, and the transformer information corresponding to the different transmission routes pre-written in the power grid list. At this time, the transformer information specifically includes the number of boost or buck times of the current when the current is transmitted on the target transmission line, and the boost voltage value or buck voltage value, which is not specifically limited in the embodiment of the present invention. In addition, in the embodiment of the present invention, when the high-voltage current transformer is installed, in order to ensure accurate installation and normal operation of the installation, the installer takes an appearance image of the installed current transformer and performs feature recognition as the device image information. Among them, the image recognition model can be an image feature recognition model constructed based on a convolutional neural network to extract the available length of the winding on the high-voltage current transformer description label in the device image information. At this time, the three-layer convolution network can be trained in advance using device image samples marked with different available lengths to obtain an image recognition model for identifying the available length of the winding, which is not specifically limited in the embodiment of the present invention.

[0029] It should be noted that, in order to avoid operational errors in the installation of each current transformer, the edge position of the coil is not used as the initial winding position in the embodiment of the present invention, but a reference position is determined as the initial winding position by the current execution end. Specifically, the initial winding position matching the available length of the winding (for example, the winding joint corresponding to the initial winding position) is determined according to the preset winding length mapping relationship, that is, the preset winding length mapping relationship is pre-configured with the initial winding position matching different available winding lengths. Generally, the current transformers of the same equipment model have the same available length and the same initial winding position, which is not specifically limited in the embodiment of the present invention.

[0030] 102. Determine an initial current ratio of the high-voltage current transformer, and send a start-up instruction to a target high-voltage electrical switch.

[0031] In the embodiment of the present invention, since the working principle of the current transformer is mainly to transform high current into low current suitable for measurement and protection through electromagnetic induction, it is not only used to measure the current, power and electric energy of the line, but also to protect valuable equipment, motors and transformers when a line fault occurs. At this time, the basic structure of the high-voltage current transformer includes a primary coil, a secondary coil, an iron core and an insulating material, that is, in the voltage transformer, the high-voltage winding is wound on the iron core, and 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 the primary coil passes through alternating current, a magnetic flux will be generated in the iron core. This magnetic flux will cause the secondary coil to generate an induced electromotive force, thereby outputting a low current. At this time, the primary coil can be used as the primary side and the second coil as the secondary side. Correspondingly, the current ratio on both sides is calculated as the current ratio. At this time, the initial current ratio is the initial current ratio of the transformer, preferably the initial value of the configuration, and the embodiment of the present invention does not make specific limitations. Furthermore, a start instruction is sent to the target high-voltage electric switch that controls the winding joint of the high-voltage current transformer to be connected to the switch joint. At this time, the start instruction carries at least one target winding position. Since winding joints are configured at different winding positions, corresponding to the joints that can be connected to the high-voltage electric switch, in the embodiment of the present invention, a high-voltage electric switch with a single joint can be selected, or a high-voltage electric switch including multiple joints can be selected (at this time, the switch has a processor for selecting a closed switch joint based on the instruction), such as Figure 2 , 3 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 joint is connected to the switch joint to obtain different current ratio effects.

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

[0033] Parsing the transformation level and the transformation pressure difference in the transformation information, and obtaining the available winding length of the high-voltage current transformer;

[0034] Determine the target position corresponding to the voltage transformation level and the voltage transformation difference based on the position proportionality coefficient, and determine the target winding position corresponding to the target position according to the available length of the winding;

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

[0036] In order to flexibly and adaptably select the winding length in the transformer, so as to close the target high-voltage switch to select the adapted transformer, the current execution end first analyzes the transformer level and transformer pressure difference in the transformer information, and at the same time can obtain the available length of the winding by identifying the collected device image information through the image recognition model. Then, the target position corresponding to the transformer level and transformer pressure difference is determined according to the position proportional coefficient. At this time, the position proportional coefficient is used to characterize the proportional relationship between the target position and the voltage, so as to determine the target position corresponding to the transformer level and the transformer pressure difference based on the position proportional coefficient. The embodiment of the present invention does not make specific restrictions. Then, the determined target winding position is compared with the maximum pressure consumption position of the transformer pressure difference. At this time, the maximum pressure consumption position is used to characterize the position corresponding to the maximum value of the voltage reduction or boost corresponding to the winding position when the transformer pressure difference is the largest. It can be pre-configured according to different transformer pressure differences, so as to match this maximum consumption position, indicating that the target winding position can safely and effectively guarantee the conversion of the current, thereby generating a start instruction, which is not specifically limited in the embodiment of the present invention.

[0037] In another embodiment of the present invention, for further definition and explanation, the step of determining the target position corresponding to the transformer level and the transformer pressure difference based on the position proportionality coefficient, and determining the target winding position corresponding to the target position according to the available length of the winding includes:

[0038] Obtaining a position proportional coefficient of the high voltage current transformer;

[0039] querying the target position corresponding to the position ratio coefficient, the voltage transformation level, and the voltage transformation pressure difference according to a preset voltage transformation distance mapping relationship; or,

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

[0041] In order to accurately determine the target winding position as a basis for selecting the transformer, the current execution end first obtains the position proportional coefficient of the configured high-voltage current transformer, and then, in a specific implementation scenario, the target position corresponding to the position proportional coefficient, transformer level, and transformer pressure difference is queried according to the 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 pressure differences, which can be configured based on the transformer model and selection requirements to reflect the static displacement selection effect. The embodiment of the present invention does not make specific limitations. In another specific implementation scenario, the current execution end calls the dynamic transformer distance relationship function, and calculates the target position corresponding to the position proportional coefficient, transformer level, and transformer pressure difference based on this dynamic transformer distance relationship function. At this time, 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 pressure difference. Specifically, the dynamic transformer distance relationship function can be, wherein, is the position proportional coefficient, is the transformer level, and is the transformer pressure difference. The embodiment of the present invention does not make specific limitations.

[0042] 103. Obtain 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 a position current ratio based on the first real-time current value and the second real-time current value.

[0043] In the embodiment of the present invention, after sending the start command, the current execution end records in real time the current value after the winding joint is connected to the switch joint of each target high-voltage switch, that is, including the first real-time current value of the primary winding and the second real-time current value of the secondary winding, and determines the corresponding position current by current ratio calculation. Among them, since a plurality of winding joints can be configured on the winding coil, a plurality of current ratios are corresponding, and therefore, the corresponding first real-time current and second real-time current collected are also multiple, and the corresponding ratios are calculated to obtain a plurality of position current ratios, which is not specifically limited in the embodiment of the present invention.

[0044] 104. Determine a 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, generate a switch control instruction for the target winding position, and send it to the target high-voltage electric switch so that the target high-voltage electric switch completes a transformer selection operation.

[0045] In an embodiment of the present invention, after determining the position current ratio, the current execution end obtains real-time current data in the target transmission route that can be obtained through a setting method and a collection method from the transmission front end, so as to determine the target winding position corresponding to this position current ratio and the initial current ratio. Among them, after the target winding position is connected to the high-voltage switch, the current ratio exhibited by the current transformer in the power transmission network is different, and the corresponding voltage drop effect is also different, so as to achieve the selection purpose. At the same time, after determining the target winding position, in order to achieve the automation effect of control, the current execution end generates a switch control instruction to send to the high-voltage switch, drive the switch to close, connect the corresponding transmission line connector, and complete the selection of the transformer.

[0046] In the embodiment of the present invention, the main control processor as the current execution end executes the method of steps 101-104 and is electrically connected to the target high-voltage electric switch to open and close the target high-voltage electric switch so that the switch connector is connected to the winding connector, such as Figure 2 As shown, at this time, the wires of the winding joints and the switch joints of the high-voltage switch are respectively connected to the transmission network, thereby obtaining transformers with different current ratios. The high-voltage current transformer is a multi-tap current transformer, that is, one side of the winding remains unchanged. When the second winding is fired, multiple joints are added to the coil, and connected to the switch joints of the high-voltage switch to obtain transformers with different current ratios without changing the current transformer equipment, thereby realizing diversified selection of transformers.

[0047] In another embodiment of the present 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 a current ratio of the real-time current data to the rated value of the winding current, and calculate an average value according to 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] Since the embodiment of the present invention adopts an adaptive method to select effective and matching winding positions to form corresponding mutual inductors, thereby improving the automatic selection and high controllability of the mutual inductors, the current execution end first uses the ratio of the collected real-time current data to the rated value of the winding current as the current ratio. At this time, the real-time current data is preferably the second real-time current data of the secondary side. Then, the current ratio, the position current ratio, and the initial current ratio are used to calculate the average value to obtain the average value, that is, the current ratio average value is used as the current ratio to reversely calculate the target winding position corresponding to the secondary winding.

[0051] It should be noted that since the switch connector of the target high-voltage switch in the embodiment of the present invention corresponds to the winding connector of the coil on the secondary side, that is, the current on the secondary side is adjusted to select the current conversion effect of the transformer, the target winding position corresponding to the current average value can be reversely calculated by using the relationship between the current ratio and the coil position ratio, and the embodiment of the present invention does not make specific limitations.

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

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

[0054] In order to make the transformer selection automatic and closed-loop, so as to meet the use effect of the transformer in a complex power grid, the current execution end also detects in real time whether the transformer electrical information has changed, for example, whether to increase the number of transformations, whether to increase or decrease the transformer voltage difference, etc., which is not specifically limited in the embodiment of the present invention. Specifically, the current execution end is connected to the winding connector of the target winding position through the switch connector of the target high-voltage electric switch. At the same time, when the transformer electrical information is detected to have changed, it indicates that the voltage rise and fall in the transmission network has changed. Therefore, the current execution end regenerates the updated target winding position based on the updated transformer electrical information and the initial winding position to re-execute the step of determining the target winding position of the high-voltage current transformer, and completes a new round of transformer selection control method.

[0055] The present invention provides a method for selecting and controlling a transformer of an electric energy meter. Compared with the prior art, the embodiment of the present invention obtains the transformer information of the target transmission route and the initial winding position of the high-voltage current transformer through a main control processor after receiving a start-up instruction of a high-voltage current transformer; determines the initial current ratio of the high-voltage current transformer, and sends a start-up instruction to a target high-voltage electric switch, wherein the start-up instruction carries at least one target winding position, and the target winding position is determined based on the transformer information and the initial winding position; obtains a first real-time current value of a primary winding and a second real-time current value of a 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; 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 instruction for the target winding position, and send it to the target high-voltage electric switch, so that the target high-voltage electric switch completes a transformer selection operation, realizes the selection of transformers with different current conversion effects based on the movement of the coil position, and realizes the purpose of automatic and unmanned transformer selection, greatly reduces the consumption of manpower and material resources, reduces the probability of error generation, and meets the requirements for transformer accuracy selection in complex environments in power transmission networks.

[0056] Furthermore, as a response to the above Figure 1 The embodiment of the present invention provides a control system for selecting a transformer of an electric energy meter, such as Figure 4 As shown, the system includes:

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

[0058] The main control processor is used to obtain the transformer electrical information of the target transmission route and the initial winding position of the high-voltage current transformer after receiving the high-voltage current transformer start-up instruction; determine the initial current ratio of the high-voltage current transformer, and send a start-up instruction to the target high-voltage electric switch, wherein the start-up instruction carries at least one target winding position, and the target winding position is determined based on the transformer electrical information and the initial winding position; obtain 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 determine the position current ratio based on the first real-time current value and the second real-time current value; 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 instruction for the target winding position, and send it to the target high-voltage electric switch, so that the target high-voltage electric switch completes a transformer selection operation.

[0059] The present invention provides a method and system for selecting and controlling a transformer of an electric energy meter. Compared with the prior art, the embodiment of the present invention obtains the transformer information of the target transmission route and the initial winding position of the high-voltage current transformer through the main control processor after receiving the start-up instruction of the high-voltage current transformer; determines the initial current ratio of the high-voltage current transformer, and sends a start-up instruction to the target high-voltage electric switch, wherein the start-up instruction carries at least one target winding position, and the target winding position is determined based on the transformer information and the initial winding position; obtains 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. value, and determine the position current ratio based on the first real-time current value and the second real-time current value; 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 instruction for the target winding position, and send it to the target high-voltage electric switch, so that the target high-voltage electric switch completes a transformer selection operation, realizes the selection of transformers with different current conversion effects based on the movement of the coil position, and realizes the purpose of automatic and unmanned transformer selection, greatly reduces the consumption of manpower and material resources, reduces the probability of error generation, and meets the requirements for transformer accuracy selection in complex environments in power transmission networks.

[0060] Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general computing system, they can be concentrated on a single computing system, or distributed on a network composed of multiple computing systems, and optionally, they can be implemented by a program code executable by a computing system, so that they can be stored in a storage system and executed by the computing system, and in some cases, the steps shown or described can be executed in a different order than here, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for selecting and controlling a mutual inductor of an electric energy meter, characterized in that: include: After receiving the high-voltage current transformer start-up instruction, obtaining the transformer information of the target transmission route and the initial winding position of the high-voltage current transformer; Determine an initial current ratio of the high-voltage current transformer, and send a start instruction to a target high-voltage electrical switch, wherein the start instruction carries at least one target winding position, and the target winding position is determined based on the transformer 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 a position current ratio based on the first real-time current value and the second real-time current value; According to the real-time current data in the target transmission route, the target winding position that matches the position current ratio and the initial current ratio is determined, and a switch control instruction for the target winding position is generated and sent to the target high-voltage electric switch so that the target high-voltage electric switch completes a transformer selection operation.

2. The method according to claim 1, characterized in that Before sending the start instruction to the target high-voltage electrical switch, the method further includes: Parsing the transformation level and the transformation pressure difference in the transformation information, and obtaining the available winding length of the high-voltage current transformer; Determine the target position corresponding to the voltage transformation level and the voltage transformation difference based on the position proportionality coefficient, and determine the target winding position corresponding to the target position according to the available length of the winding; If the target winding position matches the maximum pressure consumption position of the transformer voltage difference, 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 pressure difference based on the position proportionality coefficient, and determining the target winding position corresponding to the target position according to the available length of the winding includes: Obtaining a position proportional coefficient of the high voltage current transformer; querying the target position corresponding to the position proportionality coefficient, the voltage transformation level, and the voltage transformation pressure difference according to a preset voltage transformation distance mapping relationship, wherein the preset voltage transformation distance mapping relationship stores target positions corresponding to different position proportionality coefficients, different voltage transformation levels, and voltage transformation pressure differences; or, The dynamic voltage transformation distance relationship function is retrieved, and the target position corresponding to the position proportional coefficient, the voltage transformation level, and the voltage transformation pressure difference is calculated based on the dynamic voltage transformation distance relationship function. The dynamic voltage transformation distance relationship function is used to characterize the dynamic proportional operation relationship between the target position and the position proportional coefficient, the voltage transformation level, and the voltage transformation pressure difference.

4. The method according to claim 1, characterized in that: The step of determining 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 comprises: Determine a current ratio of the real-time current data to the rated value of the winding current, and calculate an average value according to the current ratio, the position current ratio, and the initial current ratio; The target winding position is determined from the available winding length according to the calculated average value, and winding joints are arranged at different winding positions, corresponding to joints that can be connected to the high-voltage switch.

5. The method according to claim 1, characterized in that The step of obtaining the transformer information of the target transmission route and the initial winding position of the high voltage current transformer comprises: Obtaining the entered target transmission route, and querying the transformer information matching the target transmission route; Acquire device image information of the high-voltage current transformer, and identify the available length of the winding from the device image information through an image recognition model; An initial winding position matching the available length of the winding is determined according to a preset winding length mapping relationship.

6. The method according to claim 1, characterized in that After the sending to the target high voltage electric switch, the method further comprises: After the connector of the target high-voltage electrical switch is closed with the winding connector, and when a change in the transformer electrical information is detected, the updated target winding position is regenerated based on the updated transformer electrical information and the initial winding position to re-execute the step of determining the target winding position of the high-voltage current transformer.

7. A transformer selection control system for an electric energy meter, characterized in that: include: Main control processor, target high voltage switch, The main control processor is used to obtain the transformer electrical information of the target transmission route and the initial winding position of the high-voltage current transformer after receiving the high-voltage current transformer startup instruction; determine the initial current ratio of the high-voltage current transformer, and send a startup instruction to the target high-voltage electric switch, wherein the startup instruction carries at least one target winding position, and the target winding position is determined based on the transformer electrical information and the initial winding position; obtain 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; According to the real-time current data in the target transmission route, the target winding position that matches the position current ratio and the initial current ratio is determined, and a switch control instruction for the target winding position is generated and sent to the target high-voltage electric switch so that the target high-voltage electric switch completes a transformer selection operation.

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