A current transformer automatic adjusting and calibrating method

Abstract

The present application relates to the technical field of current transformer, in particular to a kind of current transformer automatic regulation, calibration method, comprising the following steps: two groups of electric meter are deployed in series on current transformer connection line, and are respectively marked as electric meter one, electric meter two;Electric meter operating logic is set, electric meter operating logic is based on control electric meter operation, obtains electric meter acquisition line power supply information in the process of electric meter operation;Line power supply information acquired by electric meter is obtained, and line power supply information is stored;The present application is configured by the way of two groups of electric meter, and the circuit of current transformer is configured, the measurement result of electric meter is accurately calibrated, and the calibration result is monitored, the functionality of current transformer can be further detected, the real-time operation state of current transformer can be monitored, and the above-mentioned is comprehensive, and it brings the power consumption calibration for power user, to ensure that the final power consumption billing result is accurate, and by this, the operation robustness of current transformer is improved to a certain extent.

Description

Technical Field

[0001] This invention relates to the field of current transformer technology, and more specifically to an automatic adjustment and calibration method for current transformers. Background Technology

[0002] A current transformer is a special type of transformer used to convert large currents into smaller currents for use by measuring instruments or protective devices. Its main function is to proportionally transform high voltage or large current into low voltage or small current to enable monitoring and protection of power systems. Current transformers are commonly used in substations, power plants, and distribution networks of power systems to measure current, protect electrical equipment, and monitor the operating status of the power system. The main advantage of current transformers is their ability to effectively isolate high voltage and large current, ensuring the safety of personnel and equipment.

[0003] However, during operation, current transformers often experience deviations in meter readings due to their own inherent characteristics or external factors. These deviations directly lead to inaccurate electricity billing for users and hinder power transmission monitoring of power lines. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the existing technology, the present invention provides an automatic adjustment and calibration method for current transformers, which solves the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An automatic adjustment and calibration method for a current transformer includes the following steps: Two sets of meters, designated as meter one and meter two, are connected in series on the current transformer connection line; meter operation logic is set, and meter operation is controlled based on this logic, acquiring power supply information from the meter's line during operation; the acquired power supply information is stored; a meter reading request is received, and the latest stored power supply information is retrieved from the stored power supply information; the current meter reading is calculated and calibrated based on the retrieved latest stored power supply information; and the current transformer's operational safety status is analyzed based on the power supply information.

[0007] Furthermore, in step 1, among the two sets of meters connected in series on the current transformer connection line, the transformation ratio of meter one is any one of 500 / 5, 250 / 5, 100 / 5, 75 / 5, 50 / 5, and 25 / 5, and the transformation ratio of meter two is 1 / 1.

[0008] In the operating logic configured for the second electricity meter, the peak power supply period of the current transformer connection line is determined by the following logic:

[0009] Logic1: Set the peak power supply determination cycle in 24-hour units, and obtain the power supply of the current transformer connection line for each hour of the day in hourly units.

[0010] Logic2: Set the peak power supply determination threshold and obtain the daily peak power supply time within the peak power supply determination period;

[0011] Logic3: Based on the daily power supply peak periods obtained in Logic2, identify the same time periods in each group of power supply peak periods, and record the same time periods in each group of power supply peak periods as the power supply peak periods of the current transformer connection lines.

[0012] Each group shall have a peak power supply period of no less than two hours per day.

[0013] Furthermore, the meter operation logic set in step 2 is configured on meter one and meter two respectively. The operation logic configured for meter one is real-time operation, and the operation logic configured for meter two is: during the peak power supply period of the current transformer connection line, it operates when the electricity metering result of meter one is an integer, and shuts down and resets when the electricity metering result of the next electricity metering is an integer.

[0014] In step 2, the power supply information of the electricity meter collection line is obtained, which is the amount of electricity measured by electricity meter 1 and electricity meter 2.

[0015] Furthermore, during the execution phase of step 3, a database is constructed synchronously in the power system backend. The line power supply information obtained in step 3 is transmitted to the database constructed in the power system backend via a wireless network and stored in the database.

[0016] The power system and the current transformer connection line are interconnected. The current transformer connection line obtains power from the power system and transmits the power. The database is equipped with data iteration logic. Based on the data iteration logic, the database iterates the internally stored line power supply information.

[0017] The data iteration logic is as follows: a data iteration cycle is set, and based on the data iteration cycle, the line power supply information stored in the database is deleted, and the data iteration cycle is not less than the power supply peak determination cycle.

[0018] Furthermore, the operation of obtaining the electricity meter reading request in step 4 is performed using a remote interactive system;

[0019] The remote interaction system connects to meter 1 and meter 2 deployed on the current transformer connection line via a wireless network, and also connects to a database built in the power system's backend via a wireless network. The remote interaction system includes:

[0020] The login module is used to set a key, which is then used by system users to verify the key, access the system, and obtain the control permissions requested by the system modules.

[0021] The request module is used to send requests to read the electricity meter readings.

[0022] The transmission module is used to transmit line power supply information;

[0023] The login module is electrically connected to the request module, which is wirelessly connected to the transmission model. After the system user accesses the system based on the login module, the system user controls the request module to send a request to read the electricity meter reading. The line power supply information transmitted in the transmission module is: the latest set of line power supply information stored in the database and the electricity transmitted by the line connected to the current transformer currently being measured by the electricity meter.

[0024] Furthermore, the calculation and calibration logic for the current metered electricity consumption in step 5 is expressed as follows:

[0025]

[0026] In the formula: N is the electricity consumption measured by meter 1; n1 is the latest stored reading of meter 1; n1′ is the previous reading of meter 1 relative to n1; k is the transformation ratio of meter 1; N′ is the electricity consumption measured by meter 1 after calibration; n2 is the latest electricity consumption reading measured by meter 2 based on the operating logic.

[0027] The line power supply information obtained in step 6 is represented as follows: The logic for analyzing the operational safety status of current transformers is as follows:

[0028]

[0029] In the formula: When step 5 is executed for the first time, the line power supply information used to calculate N′ is used. When step 5 is executed for the second time, the line power supply information used to calculate N′ is used. When step 5 is executed for the third time, the line power supply information used to calculate N′ is used.

[0030] When the current transformer operation safety status analysis logic is executed, it applies any three sets of continuous line power supply information. If the above formula is true, it indicates that the current transformer is malfunctioning and the current transformer is gradually becoming damaged. Conversely, it indicates that the current transformer is operating safely and its functions are complete.

[0031] Furthermore, in step 6, based on the current transformer operation safety status analysis logic, the analyzed current transformer safety status is represented by a line graph. The line graph representing the current transformer safety status is fed back to the remote interaction system in real time via a wireless network and received by the transmission module. The system-end user reads the line graph representing the current transformer safety status from the transmission module in the remote interaction system.

[0032] Compared with known public technologies, the technical solution provided by this invention has the following beneficial effects:

[0033] 1. This invention provides an automatic adjustment and calibration method for a current transformer. During its execution, the method configures two sets of electricity meters to precisely calibrate the meter readings of the current transformer under circuitry. Simultaneously, the calibration results are monitored, further testing the functionality of the current transformer and ensuring its real-time operating status is monitored. In summary, this provides electricity consumption calibration for users, ensuring accurate final electricity billing results and thereby improving the robustness of the current transformer's operation to a certain extent.

[0034] 2. In the implementation phase of the method of the present invention, a remote interaction system is configured simultaneously, which enables the method to further interact with the power system based on the remote interaction system, thereby providing the power system backend with the conditions for remote management of power supply lines. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0036] Figure 1 This is a flowchart illustrating an automatic adjustment and calibration method for a current transformer.

[0037] Figure 2 This is a schematic diagram of the remote interaction system in this invention. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0039] The present invention will be further described below with reference to embodiments.

[0040] Example 1:

[0041] This embodiment provides an automatic adjustment and calibration method for a current transformer, such as... Figures 1-2 As shown, it includes the following steps:

[0042] Step 1: Connect two sets of meters in series on the current transformer connection line, and label them as meter one and meter two respectively;

[0043] Step 2: Set the meter operation logic, control the meter operation based on the meter operation logic, and acquire the power supply information of the meter collection line during the meter operation process;

[0044] Step 3: Obtain the line power supply information collected by the meter in Step 2 and store the line power supply information;

[0045] Step 4: Obtain the electricity meter reading request. When the electricity meter reading request is obtained, retrieve the latest stored line power supply information from the stored line power supply information.

[0046] Step 5: Based on the latest stored line power supply information, calculate and calibrate the current electricity meter reading;

[0047] Step 6: Obtain the line power supply information of the application executed in Step 5, and analyze the operational safety status of the current transformer based on the line power supply information;

[0048] The operation of obtaining the electricity meter reading request in step 4 is executed by the remote interactive system;

[0049] The remote interaction system connects to meter 1 and meter 2 deployed on the current transformer line via a wireless network, and also connects to a database built in the power system's backend via a wireless network. The remote interaction system includes:

[0050] The login module is used to set a key, which is then used by system users to verify the key, access the system, and obtain the control permissions requested by the system modules.

[0051] The request module is used to send requests to read the electricity meter readings.

[0052] The transmission module is used to transmit line power supply information;

[0053] The login module is electrically connected to the request module, and the request module is wirelessly connected to the transmission model. After the system user accesses the system through the login module, the system controls the request module to send a request to read the electricity meter reading. The line power supply information transmitted in the transmission module is: the latest set of line power supply information stored in the database, and the electricity transmitted by the current transformer connected to the meter.

[0054] The calculation and calibration logic for the current meter reading in step 5 is expressed as follows:

[0055]

[0056] In the formula: N is the electricity consumption measured by meter 1; n1 is the latest stored reading of meter 1; n1′ is the previous reading of meter 1 relative to n1; k is the transformation ratio of meter 1; N′ is the electricity consumption measured by meter 1 after calibration; n2 is the latest electricity consumption reading measured by meter 2 based on the operating logic.

[0057] The line power supply information obtained in step 6 is represented as follows: The logic for analyzing the operational safety status of current transformers is as follows:

[0058]

[0059] In the formula: When step 5 is executed for the first time, the line power supply information used to calculate N′ is used. When step 5 is executed for the second time, the line power supply information used to calculate N′ is used. When step 5 is executed for the third time, the line power supply information used to calculate N′ is used.

[0060] When the current transformer operation safety status analysis logic is executed, it applies any three sets of continuous line power supply information. If the above formula is true, it indicates that the current transformer is malfunctioning and the current transformer is gradually becoming damaged. Conversely, it indicates that the current transformer is operating safely and its functions are complete.

[0061] In this embodiment, the execution of the above method provides reliable and accurate calibration for the metering of the power supply line where the current transformer is located, ensuring accurate metering results. This facilitates subsequent billing based on meter readings. Furthermore, through the further configuration of the remote interaction system, the power system backend can achieve a certain degree of interaction with the meter and current transformer. Based on the execution of this method, a certain monitoring effect can be achieved for the current transformer, ensuring that the operating status of the current transformer continues to stabilize. When a fault occurs in the current transformer, the steps of this method can be executed to detect the fault, facilitating centralized safety management of the power supply line and the current transformers and meters deployed on the power supply line.

[0062] Example 2:

[0063] At the implementation level, based on Example 1, this example refers to... Figure 1 The automatic adjustment and calibration method for a current transformer in Example 1 is further described in detail below:

[0064] In step 1, the two sets of meters connected in series on the current transformer connection line have the following turns ratios: meter one has a turns ratio of 500 / 5, 250 / 5, 100 / 5, 75 / 5, 50 / 5, or 25 / 5, and meter two has a turns ratio of 1 / 1.

[0065] like Figure 1 As shown, the meter operation logic set in step 2 is configured on meter one and meter two respectively. The operation logic configured for meter one is real-time operation, and the operation logic configured for meter two is: during the peak power supply period of the current transformer connection line, it runs when the electricity metering result of meter one is an integer, and shuts down and resets when the electricity metering result of the next electricity metering is an integer.

[0066] In step 2, the power supply information of the electricity meter collection line is obtained, which is the amount of electricity measured by electricity meter 1 and electricity meter 2.

[0067] The above settings further define the electricity meters configured during the execution of the steps in this method, thereby providing the necessary operational data support for the execution of the steps in this method.

[0068] like Figure 1 As shown, in the operating logic of meter two, the peak power supply period of the current transformer connection line is determined by the following logic:

[0069] Logic1: Set the peak power supply determination cycle in 24-hour units, and obtain the power supply of the current transformer connection line for each hour of the day in hourly units.

[0070] Logic2: Set the peak power supply determination threshold and obtain the daily peak power supply time within the peak power supply determination period;

[0071] Logic3: Based on the daily power supply peak periods obtained in Logic2, identify the same time periods in each group of power supply peak periods, and record the same time periods in each group of power supply peak periods as the power supply peak periods of the current transformer connection lines.

[0072] Each group shall have a peak power supply period of no less than two hours per day.

[0073] Through the above settings, the specified operating logic is further configured for meter 2, ensuring that meter 1 and meter 2 configured in this method can operate stably and in a compatible manner, providing stable execution conditions and data support for the execution of the steps in this method.

[0074] like Figure 1 As shown, in the execution phase of step 3, a database is built synchronously with the power system backend. The line power supply information obtained in step 3 is transmitted to the database built by the power system backend via wireless network and stored in the database.

[0075] The power system and the current transformer are interconnected by the connection lines. The current transformer connection lines obtain power from the power system and transmit the power. The database is equipped with data iteration logic. Based on the data iteration logic, the database iterates the internally stored line power supply information.

[0076] The data iteration logic is as follows: set a data iteration cycle, delete the line power supply information stored in the database based on the data iteration cycle, and the data iteration cycle is not less than the power supply peak determination cycle.

[0077] The above settings further define the operating logic of the database used in the execution of the method steps, ensuring that the database stably stores line power supply information and provides stable and necessary data support for the execution of subsequent steps in the method.

[0078] Example 3:

[0079] At the implementation level, based on Example 1, this example refers to... Figure 1 The automatic adjustment and calibration method for a current transformer in Example 1 is further described in detail below:

[0080] In step 6, based on the current transformer operation safety status analysis logic, the analyzed current transformer safety status is represented by a line graph. The line graph representing the current transformer safety status is fed back to the remote interactive system in real time via a wireless network and received by the transmission module. The system-end user reads the line graph representing the current transformer safety status from the transmission module in the remote interactive system.

[0081] In this embodiment, the above settings provide another form of representation for the operational safety status analysis of current transformers and bring visualized reading conditions to the power system backend users.

[0082] In summary, the method in the above embodiments, by configuring two sets of electricity meters during its execution, accurately calibrates the metering results of the current transformer under the circuit configuration, and monitors the calibration results. This allows for further testing of the functionality of the current transformer, ensuring that the real-time operating status of the current transformer can be monitored. In summary, this provides electricity consumption calibration for users, ensuring the accuracy of the final electricity billing results, and thereby improving the operational robustness of the current transformer to a certain extent. Furthermore, the method simultaneously configures a remote interaction system during the implementation phase, enabling further interaction with the power system and providing remote management capabilities for the power supply lines to the power system's backend.

[0083] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic adjustment and calibration method for a current transformer, characterized in that, Includes the following steps: Step 1: Connect two sets of meters in series on the current transformer connection line, and label them as meter one and meter two respectively; In step 1, the two sets of meters connected in series on the current transformer connection line have the following turns ratios: meter one has a turns ratio of any one of 500 / 5, 250 / 5, 100 / 5, 75 / 5, 50 / 5, or 25 / 5, and meter two has a turns ratio of 1 / 1. Step 2: Set the meter operation logic, control the meter operation based on the meter operation logic, and acquire the power supply information of the meter collection line during the meter operation process; The meter operation logic set in step 2 is configured on meter one and meter two respectively. The operation logic configured for meter one is real-time operation. The operation logic configured for meter two is: during the peak power supply period of the current transformer connection line, it operates when the electricity metering result of meter one is an integer, and shuts down and resets when the electricity metering result of the next electricity metering is an integer. Among them, the power supply information of the electricity meter collection line obtained in step 2 is the electricity measured by electricity meter 1 and electricity meter 2. Step 3: Obtain the line power supply information collected by the meter in Step 2 and store the line power supply information; Step 4: Obtain the electricity meter reading request. When the electricity meter reading request is obtained, retrieve the latest stored line power supply information from the stored line power supply information. Step 5: Based on the latest stored line power supply information, calculate and calibrate the current electricity meter reading; The calculation and calibration logic for the current electricity meter reading in step 5 is expressed as follows: ； In the formula: The electricity meter measures the amount of electricity consumed. The latest stored meter reading; For relative to The last reading of the meter; This refers to the first transformation ratio of the electricity meter; The calibrated electricity meter measures electricity consumption. This is the latest electricity reading measured by meter two during operation based on its operating logic. Step 6: Obtain the line power supply information of the application executed in Step 5, and analyze the operational safety status of the current transformer based on the line power supply information.

2. The automatic adjustment and calibration method for a current transformer according to claim 1, characterized in that, In the operating logic configured for the second electricity meter, the peak power supply period of the current transformer connection line is determined by the following logic: Logic1: Set the peak power supply determination cycle in 24-hour units, and obtain the power supply of the current transformer connection line for each hour of the day in hourly units. Logic2: Set the peak power supply determination threshold and obtain the daily peak power supply periods within the peak power supply determination period; Logic3: Based on the daily power supply peak periods obtained in Logic2, identify the same time periods in each group of power supply peak periods, and record the same time periods in each group of power supply peak periods as the power supply peak periods of the current transformer connection lines. Each group shall have a peak power supply period of no less than two hours per day.

3. The automatic adjustment and calibration method for a current transformer according to claim 1, characterized in that, During the execution phase of step 3, a database is constructed synchronously in the power system backend. The line power supply information obtained in step 3 is transmitted to the database constructed in the power system backend via wireless network and stored in the database. The power system and the current transformer connection line are interconnected. The current transformer connection line obtains power from the power system and transmits the power. The database is equipped with data iteration logic. Based on the data iteration logic, the database iterates the internally stored line power supply information. The data iteration logic is as follows: a data iteration cycle is set, and based on the data iteration cycle, the line power supply information stored in the database is deleted, and the data iteration cycle is not less than the power supply peak determination cycle.

4. The automatic adjustment and calibration method for a current transformer according to claim 1, characterized in that, The operation of obtaining the electricity meter reading request in step 4 is performed by the remote interactive system. The remote interaction system connects to meter 1 and meter 2 deployed on the current transformer connection line via a wireless network, and also connects to a database built in the power system's backend via a wireless network. The remote interaction system includes: The login module is used to set a key, which is then used by system users to verify the key, access the system, and obtain the control permissions requested by the system modules. The request module is used to send requests to read the electricity meter readings. The transmission module is used to transmit power supply information for the line.

5. The automatic adjustment and calibration method for a current transformer according to claim 4, characterized in that, The login module is connected to the request module via a wire, and the request module is connected to the transmission module via a wireless network. After the system user accesses the system based on the login module, the system user controls the request module to send a request to read the electricity meter reading. The line power supply information transmitted in the transmission module includes: the latest set of line power supply information stored in the database and the electricity transmitted by the line connected to the current transformer currently being measured by the electricity meter.

6. The automatic adjustment and calibration method for a current transformer according to claim 1, characterized in that, The line power supply information obtained in step 6 is represented as follows: The logic for analyzing the operational safety status of current transformers is as follows: ； In the formula: For the first execution of step 5, calculate The line power supply information used in the application; For the second execution of step 5, calculate The line power supply information used in the application; For the third execution of step 5, calculate The line power supply information used in the application; When the current transformer operation safety status analysis logic is executed, it applies any three sets of continuous line power supply information. If the above formula is true, it indicates that the current transformer is malfunctioning and the current transformer is gradually becoming damaged. Conversely, it indicates that the current transformer is operating safely and its functions are complete.

7. The automatic adjustment and calibration method for a current transformer according to claim 1, characterized in that, In step 6, based on the current transformer operation safety status analysis logic, the analyzed current transformer safety status is represented by a line graph. The line graph representing the current transformer safety status is fed back to the remote interaction system in real time via a wireless network and received by the transmission module. The system-end user reads the line graph representing the current transformer safety status from the transmission module in the remote interaction system.

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