Power distribution terminal temperature coefficient test method and device, electronic equipment and storage medium
By checking the temperature correction coefficient, the relative sizes of multiple temperature correction coefficients are used to quickly judge abnormalities, and the protection module is disabled, which solves the problem of misprotecting the distribution terminal and ensures the accuracy of the telemetry value.
Patent Information
- Application Number
- CN202510486118.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-17
- Publication Date
- 2025-07-08
AI Technical Summary
During operation, the power distribution terminal may be incorrectly protected, resulting in power outages of lines or equipment that are operating normally, affecting the normal operation of the distribution network.
By checking the temperature correction coefficient, the relative magnitude of the multiple temperature correction coefficients is used to quickly judge the abnormality of the temperature correction coefficient, and the protection module is disabled to avoid incorrect protection.
It effectively solves the problem of misprotecting distribution terminals, ensures the accuracy of telemetry values, and avoids unnecessary protection actions.
Smart Images
Figure CN120274906A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure belongs to the field of power distribution, and more specifically, relates to a method and device for testing the temperature coefficient of a power distribution terminal, an electronic device, and a storage medium. Background Art
[0002] As an important part of the distribution network automation system, the power distribution terminal can remotely monitor (telemetry) parameters such as the current and voltage of the power grid in real time. When detecting faults such as short circuits and overloads, it can quickly issue a tripping command to make the relevant switchgear operate, quickly cut off the fault, prevent the fault from spreading, and avoid further damage to electrical equipment.
[0003] However, during actual operation, the power distribution terminal may misjudge the operating state of the power grid, resulting in misprotection. That is, when there is no fault that requires protection in the power grid, the power distribution terminal may erroneously issue a protection action instruction, causing the normal operating line or equipment to be powered off, affecting the normal operation of the distribution network. Therefore, how to avoid the misprotection of the power distribution terminal has become an urgent problem to be solved in this field. Summary of the Invention
[0004] The purpose of the present disclosure is to provide a method and device for testing the temperature coefficient of a power distribution terminal, an electronic device, and a storage medium to avoid misprotection of the power distribution terminal.
[0005] In the first aspect of the embodiments of the present disclosure, a method for testing the temperature coefficient of a power distribution terminal is provided, including: Responding to the temperature of the power distribution terminal being within a first temperature range, determining a first relative error between a first temperature coefficient and a second temperature coefficient; The first temperature coefficient and the second temperature coefficient are used to correct the measured values of the power distribution terminal in the corresponding temperature range, and the first temperature coefficient corresponds to the first temperature range; Responding to the first relative error exceeding an error threshold, sending a first signal to the protection module corresponding to the power distribution terminal; The first signal is used to instruct the protection module to set the working state to a disabled state.
[0006] In the second aspect of the embodiments of the present disclosure, a device for testing the temperature coefficient of a power distribution terminal is provided, including: An error calculation module, configured to respond to the temperature of the power distribution terminal being within a first temperature range, and determine a first relative error between a first temperature coefficient and a second temperature coefficient; The first temperature coefficient and the second temperature coefficient are used to correct the measured values of the power distribution terminal in the corresponding temperature range, and the first temperature coefficient corresponds to the first temperature range; An output control module, configured to send a first signal to a protection module corresponding to the power distribution terminal in response to the first relative error exceeding an error threshold; The first signal is used to instruct the protection module to set the working state to a disabled state.
[0007] In a third aspect of the embodiments of the present disclosure, an electronic device is provided, including a memory, a processor, and a computer program stored in the memory and running on the processor. When the processor executes the computer program, the steps of the above-mentioned temperature coefficient inspection method for the power distribution terminal are implemented.
[0008] In a fourth aspect of the embodiments of the present disclosure, a computer-readable storage medium is provided. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the above-mentioned temperature coefficient inspection method for the power distribution terminal are implemented.
[0009] The beneficial effects of the temperature coefficient inspection method, device, electronic device, and storage medium for the power distribution terminal provided by the embodiments of the present disclosure are as follows: First of all, the inventors of the embodiments of the present disclosure discovered the reasons for the misprotection of the power distribution terminal. That is: when the power distribution terminal is upgraded, the temperature correction coefficient stored therein may have data anomalies, resulting in errors in the correction of the telemetry value of the power distribution terminal, inaccurate telemetry values, and thus misprotection. Therefore, the inventors of the embodiments of the present disclosure creatively proposed the overall concept of the embodiments of the present disclosure: to solve the problem of "misprotection of the power distribution terminal" by means of "inspecting the temperature correction coefficient", which is the key difference between the present disclosure and conventional technical means.
[0010] On this basis, when specifically performing parameter inspection, those skilled in the art usually adopt the method of threshold inspection, that is, comparing the temperature correction coefficient with the corresponding threshold to determine whether the temperature correction coefficient is abnormal. However, this method has a problem: at different temperatures, the corresponding temperature correction coefficient and its corresponding threshold are different. Therefore, there are multiple temperature correction coefficients and corresponding thresholds, and under different operating conditions, the corresponding threshold of the temperature correction coefficient will change. Fixed threshold judgment may not be accurate. If the corresponding threshold is calculated in real time, it may be necessary to obtain various electrical data for a certain period of time, and the calculation takes a long time. It is very likely that misprotection has occurred during the process of threshold calculation. Therefore, on the basis of the above overall concept, the embodiments of the present disclosure also creatively use the relative magnitudes of multiple temperature correction coefficients for mutual inspection, so as to quickly complete the inspection of the temperature correction coefficient. Based on this, the embodiments of the present disclosure can disable the protection function when the temperature correction coefficient inspection is abnormal, thus effectively solving the problem of misprotection of the power distribution terminal.
[0011] In summary, the embodiments of the present disclosure first creatively propose the overall concept of "updating the status of the protection module by using the inspection of the temperature correction coefficient to avoid false protection". Secondly, the embodiments of the present disclosure also provide a specific method that can quickly and effectively perform the inspection of the temperature correction coefficient. The problems of the prior art are effectively solved by combining the foregoing overall concept and specific method. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0013] Figure 1 It is a schematic flowchart of a method for inspecting the temperature coefficient of a distribution terminal provided by an embodiment of the present disclosure; Figure 2 It is a schematic diagram of the principle of a current detection circuit provided by an embodiment of the present disclosure; Figure 3 It is a structural block diagram of a device for inspecting the temperature coefficient of a distribution terminal provided by an embodiment of the present disclosure; Figure 4 It is a schematic block diagram of an electronic device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0014] In the following description, specific details such as specific system structures and technologies are proposed for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present disclosure. However, those skilled in the art should clearly understand that the present disclosure can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present disclosure.
[0015] To make the objectives, technical solutions, and advantages of the present disclosure clearer, the following will be described through specific embodiments with reference to the drawings.
[0016] Please refer to Figure 1 , Figure 1 which is a schematic flowchart of a method for inspecting the temperature coefficient of a distribution terminal provided by an embodiment of the present disclosure. The method includes: S101: In response to the temperature of the distribution terminal being within the first temperature range, determine the first relative error between the first temperature coefficient and the second temperature coefficient; the first temperature coefficient and the second temperature coefficient are used to correct the measured values of the distribution terminal in the corresponding temperature range, and the first temperature coefficient corresponds to the first temperature range.
[0017] In this embodiment, considering that the electronic components in the distribution terminal are easily affected by temperature, resulting in inaccurate detection results. Therefore, to ensure the accuracy of telemetry, multiple temperature correction coefficients are stored in the distribution terminal. The multiple temperature correction coefficients are respectively used for correcting the telemetry values in different temperature ranges to eliminate the influence of temperature on the telemetry values. For example, the multiple temperature correction coefficients may include a first temperature coefficient and a second temperature coefficient. The first temperature coefficient is used to correct the measured value (telemetry value) of the distribution terminal when the temperature of the distribution terminal is within the first temperature range, and the second temperature coefficient is used to correct the measured value (telemetry value) of the distribution terminal when the temperature of the distribution terminal is within the second temperature range.
[0018] However, compatibility problems will occur during the upgrade of the distribution terminal, resulting in the loss of temperature correction coefficients. It is necessary to manually read the correction coefficients from the previous program first, and then write the correction coefficients after the upgrade of the distribution terminal is completed. However, manual filling may result in filling errors, leading to inaccurate detection results, thereby causing the distribution terminal to misjudge the operating state of the power grid and malfunction.
[0019] Therefore, the inventors of the embodiments of the present disclosure creatively proposed the overall concept of the embodiments of the present disclosure: to solve the problem of "misprotection of the distribution terminal" by means of "testing the temperature correction coefficients", which is the key difference between the present disclosure and conventional technical means.
[0020] Specifically, when the temperature of the distribution terminal is within the first temperature range, the first temperature coefficient can be judged whether it is normal by mutually testing the first temperature coefficient and the second temperature coefficient. Specifically, the first relative error between the first temperature coefficient and the second temperature coefficient can be calculated, and whether the first temperature coefficient is normal can be judged according to the magnitude of the first relative error.
[0021] Preferably, among the multiple temperature correction coefficients, at least one manually set temperature correction coefficient may be included. For example, the second temperature correction coefficient is manually set to ensure the accuracy of the second temperature correction coefficient. On this basis, testing the first temperature coefficient based on the second temperature coefficient can ensure the accuracy of the first temperature coefficient test.
[0022] In actual use, multiple temperature correction coefficients may include a high temperature correction coefficient, a low temperature correction coefficient and a normal temperature correction coefficient, wherein the high temperature correction coefficient is used to correct the detection result when the temperature of the distribution terminal is greater than the high temperature threshold; the normal temperature correction coefficient is used to correct the detection result when the temperature of the distribution terminal is at normal temperature; the low temperature correction coefficient is used to correct the detection result when the temperature of the distribution terminal is less than the low temperature threshold. The high temperature threshold and the low temperature threshold are preset constants. For example, the high temperature threshold may be 45°C, and the low temperature threshold may be -25°C. Correspondingly, the temperature range corresponding to the high temperature correction coefficient may be above 45°C, the temperature range corresponding to the normal temperature correction coefficient may be -25°C~45°C, and the temperature range corresponding to the low temperature correction coefficient may be below -25°C.
[0023] At this time, the first temperature coefficient can be a high temperature correction coefficient or a low temperature correction coefficient, and the second temperature coefficient can be a normal temperature correction coefficient. The distribution terminal works under normal temperature conditions most of the time. Therefore, the setting of the normal temperature correction coefficient is relatively simple and not prone to errors. The high temperature correction coefficient and the low temperature correction coefficient can be checked based on the normal temperature correction coefficient. S102: In response to the first relative error exceeding the error threshold, sending a first signal to a protection module corresponding to the power distribution terminal; the first signal is used to instruct the protection module to set the working state to a disabled state.
[0024] In this embodiment, the error threshold can be obtained through statistical data. Specifically, according to national standards, the maximum collection current of the distribution terminal is 10 times the rated current value (within 3% error). Therefore, current data within this range can be collected, and the first relative error between the first temperature coefficient and the second temperature coefficient corresponding to the current data can be statistically calculated. The maximum value of the first relative error obtained by statistics is used as the error threshold. In this embodiment, the error threshold obtained by statistics is 6%.
[0025] Furthermore, considering different distribution terminals and different working environments, the error thresholds may be different. For example, for distribution terminals with high precision requirements, the relative error of the temperature coefficient is required to be controlled within a very small range, and the error threshold can be set lower; while for some distribution terminals with relatively low precision requirements, the error threshold can be appropriately relaxed. For another example, in an environment with drastic temperature changes, the measured value may fluctuate greatly. In order to avoid misjudgment, the error threshold needs to be set relatively large; while in an environment with stable temperature, the measured value is relatively stable, and the error threshold can be set smaller.
[0026] Therefore, this embodiment uses the statistically obtained error threshold as a reference value, and adjusts the reference value of the error threshold based on the second formula to obtain error thresholds for different power distribution terminals and different working environments. The second formula is:
[0027] Among them, represents the error threshold, represents the reference value of the error threshold, represents the first adjustment parameter corresponding to the accuracy level of the distribution terminal. The higher the accuracy level, the smaller it is; represents the standard deviation of the ambient temperature, represents the average value of the ambient temperature, can characterize the fluctuation value of the ambient temperature, represents the second adjustment parameter corresponding to the ambient temperature fluctuation value, and are both preset constants.
[0028] In this embodiment, when there is a power failure restart or a remote upgrade log is detected in the distribution terminal, the steps of the first temperature coefficient test can be started. Among them, when the temperature of the distribution terminal is greater than the high temperature threshold, the error between the high temperature correction coefficient and the normal temperature correction coefficient can be calculated as the first relative error; when the temperature of the distribution terminal is less than the low temperature threshold, the error between the low temperature correction coefficient and the normal temperature correction coefficient can be calculated as the first relative error.
[0029] On this basis, when the temperature of the distribution terminal is greater than the high temperature threshold, if the first relative error is greater than the error threshold, it indicates that the high temperature correction coefficient is abnormal. At this time, to avoid misoperation of the protection module caused by the abnormal high temperature correction coefficient, a first signal can be sent to the protection module to disable the protection module; when the temperature of the distribution terminal is less than the low temperature threshold, if the first relative error is greater than the error threshold, it indicates that the low temperature correction coefficient is abnormal. At this time, to avoid misprotection of the distribution terminal caused by the abnormal low temperature correction coefficient, a first signal can be sent to the protection module to disable the protection module. Among them, disabling the protection module can be not triggering the protection module or closing the output of the protection module.
[0030] It can be concluded from the above that this embodiment first creatively proposes the overall concept of "using the test of the temperature correction coefficient to update the state of the protection module to avoid misprotection", and secondly, the embodiments of the present disclosure also give a specific method that can quickly and effectively test the temperature correction coefficient. Through the combination of the foregoing overall concept and specific method, the problems of the prior art are effectively solved.
[0031] In an embodiment of the present disclosure, in response to the first relative error exceeding the error threshold, sending a first signal to the protection module corresponding to the distribution terminal includes: Determining the second relative error between the second temperature coefficient and the third temperature coefficient; In response to the second relative error not exceeding the error threshold, send a first signal to the protection module corresponding to the power distribution terminal.
[0032] In this embodiment, when the first temperature coefficient is a high-temperature correction coefficient, the third temperature coefficient can be a low-temperature correction coefficient; when the first temperature coefficient is a low-temperature correction coefficient, the third temperature coefficient can be a high-temperature correction coefficient. To avoid misjudgment of the first temperature coefficient caused by abnormal second temperature coefficient, when it is detected that the first relative error is greater than the error threshold, the second relative error between the second temperature coefficient and the third temperature coefficient can be further calculated to conduct a secondary test on the first temperature coefficient.
[0033] Specifically, when the first relative error is greater than the error threshold, it indicates that the first temperature coefficient may be abnormal. At this time, if the second relative error is less than the error threshold, it indicates that the second temperature coefficient and the third temperature coefficient are normal, then it can be further determined that the first temperature coefficient is abnormal, and a first signal can be sent to disable the protection module; if the second relative error is greater than the error threshold, it indicates that the second temperature coefficient and the third temperature coefficient may also be abnormal. Therefore, it cannot be determined that the first temperature coefficient must be abnormal, and other judgment conditions need to be added for further determination.
[0034] It can be concluded from the above that this embodiment conducts a secondary test on the first temperature coefficient based on the second relative error between the second temperature coefficient and the third temperature coefficient. When the results of the two tests are consistent, it can be determined that the first temperature coefficient is abnormal, further improving the accuracy of the first temperature coefficient test.
[0035] In an embodiment of the present disclosure, in response to the first relative error exceeding the error threshold, sending a first signal to the protection module corresponding to the power distribution terminal further includes: In response to the second relative error exceeding the error threshold, determine the third relative error between the first temperature coefficient and the third temperature coefficient; In response to the third relative error exceeding the error threshold, send a first signal to the protection module corresponding to the power distribution terminal.
[0036] In this embodiment, if both the first relative error and the second relative error are greater than the error threshold, it indicates that the first temperature coefficient, the second temperature coefficient, and the third temperature coefficient may all be abnormal. At this time, it is necessary to further calculate the third relative error between the first temperature coefficient and the third temperature coefficient, and determine whether the first temperature coefficient is normal according to the magnitude of the third relative error.
[0037] Specifically, if the third relative error is greater than the error threshold, it indicates that the first temperature coefficient and the third temperature coefficient may be abnormal. Combining the conclusion that both the first relative error and the second relative error are greater than the error threshold for comprehensive judgment, it can be obtained that the first temperature coefficient, the second temperature coefficient, and the third temperature coefficient are all abnormal. At this time, the first signal can be sent to disable the protection module; conversely, if the third relative error is less than the error threshold, it indicates that both the first temperature coefficient and the third temperature coefficient are normal. At this time, within the temperature range corresponding to the first temperature coefficient, the protection module can operate normally, that is, there is no need to send the first signal. Considering that in this case, the second temperature coefficient is abnormal, therefore, the abnormal state of the second temperature coefficient can be marked by setting a flag bit or other means. For example, the second temperature coefficient is set to the first state to indicate that when the temperature of the power distribution terminal is within the second temperature range, the first signal is directly sent to disable the protection module.
[0038] It can be concluded from the above that based on the second relative error between the second temperature coefficient and the third temperature coefficient, and the third relative error between the first temperature coefficient and the third temperature coefficient, this embodiment comprehensively tests the first temperature coefficient, further improving the accuracy of the first temperature coefficient test.
[0039] In an embodiment of the present disclosure, the method for testing the temperature coefficient of the power distribution terminal further includes: In response to both the second relative error and the third relative error exceeding the error threshold, set the second temperature coefficient and the third temperature coefficient to the first state; The first state of the second temperature coefficient is used to indicate that when the temperature of the power distribution terminal is within the second temperature range, a first signal is sent to the protection module corresponding to the power distribution terminal; The first state of the third temperature coefficient is used to indicate that when the temperature of the power distribution terminal is within the third temperature range, a first signal is sent to the protection module corresponding to the power distribution terminal.
[0040] In this embodiment, when the second relative error between the first temperature coefficient and the second temperature coefficient, the second relative error between the second temperature coefficient and the third temperature coefficient, and the third relative error between the first temperature coefficient and the third temperature coefficient are all greater than the error threshold, it indicates that the first temperature coefficient, the second temperature coefficient, and the third temperature coefficient are all abnormal. At this time, both the second temperature coefficient and the third temperature coefficient can be set to the first state. For example, flag bits can be set respectively for the second temperature coefficient and the third temperature coefficient, and the flag bit corresponding to the second temperature coefficient is set to the first value to represent that the second temperature coefficient is in the first state, or the flag bit corresponding to the third temperature coefficient is set to the first value to represent that the third temperature coefficient is in the first state.
[0041] When the temperature of the distribution terminal is within the second temperature range, if the second temperature coefficient is detected to be in the first state, it indicates that the second temperature coefficient is abnormal. At this time, there is no need to perform the inspection of the second temperature coefficient, and the first signal can be directly sent to disable the protection module.
[0042] When the temperature of the distribution terminal is within the third temperature range (such as the temperature range corresponding to the low-temperature correction coefficient), if the third temperature coefficient is detected to be in the first state, it indicates that the third temperature coefficient is abnormal. At this time, the first signal can be sent to disable the protection module.
[0043] It can be concluded from the above that in this embodiment, by setting the states of the second temperature coefficient and the third temperature coefficient, the repeated inspection of the second temperature coefficient and the third temperature coefficient can be avoided.
[0044] In an embodiment of the present disclosure, in response to the first relative error exceeding the error threshold, sending a first signal to the protection module corresponding to the distribution terminal includes: In response to the first relative error exceeding the error threshold, determining the second relative error of the second temperature coefficient and the third temperature coefficient; In response to the second relative error exceeding the error threshold, determining the third relative error of the first temperature coefficient and the third temperature coefficient; In response to the third relative error not exceeding the error threshold, setting the second temperature coefficient to the first state, where the first state is used to indicate that when the temperature of the distribution terminal is within the second temperature range, a first signal is sent to the protection module corresponding to the distribution terminal.
[0045] In this embodiment, when the second relative error between the first temperature coefficient and the second temperature coefficient is greater than the error threshold, and the second relative error between the second temperature coefficient and the third temperature coefficient is greater than the error threshold, but the third relative error between the first temperature coefficient and the third temperature coefficient is less than the error threshold, it indicates that both the first temperature coefficient and the third temperature coefficient are normal, and the second temperature coefficient is abnormal. At this time, the second temperature coefficient can be set to the first state. For example, a flag bit can be set for the second temperature coefficient, and the flag bit corresponding to the second temperature coefficient can be set to the first value to represent that the second temperature coefficient is in the first state.
[0046] When the temperature of the distribution terminal is within the second temperature range, if the second temperature coefficient is detected to be in the first state, it indicates that the second temperature coefficient is abnormal. At this time, the first signal can be sent to disable the protection module.
[0047] It can be concluded from the above that in this embodiment, through the joint inspection of the first relative error, the second relative error, and the third relative error, the abnormal state of the second temperature coefficient can be detected in a timely manner.
[0048] In an embodiment of the present disclosure, after sending a first signal to the protection module corresponding to the power distribution terminal, the power distribution terminal temperature coefficient inspection method further includes: Determine the change amount of the resistance values of the first resistor and the second resistor in the operating parameter detection circuit with respect to temperature based on the temperature of the power distribution terminal; correct the first temperature coefficient based on the change amount of the resistance values of the first resistor and the second resistor with respect to temperature, and send a second signal to the protection module corresponding to the power distribution terminal; The second signal is used to instruct the protection module to set the working state to the enabled state.
[0049] In this embodiment, the power distribution terminal temperature coefficient inspection method is applied to the measurement and control unit of the power distribution terminal. The measured value of the power distribution terminal is obtained by reading the output signals of each operating parameter detection circuit. The input signal of the operating parameter detection circuit is the output signal of the acquisition module of the operating parameter. The acquisition module of the operating parameter can be a sensor. Taking the operating parameter of current as an example, a current sensor can be used to collect the current signal. Since the output signal of the sensor is usually relatively weak, the output signal of the sensor is connected to the input end of the operating parameter detection circuit. The operating parameter detection circuit can amplify the output signal of the sensor and then connect it to the measurement and control unit. The measurement and control unit can obtain the specific value of the operating parameter by reading the output signal of the operating parameter detection circuit. Among them, the amplification factor of the operating parameter detection circuit is determined by the resistance values of the first resistor and the second resistor.
[0050] This embodiment takes into account that the resistance values of the first resistor and the second resistor will change with temperature. Therefore, based on the change amount of the resistance values of the first resistor and the second resistor with respect to temperature, the change amount of the amplification factor can be determined, and then the first temperature coefficient can be corrected based on the change amount of the amplification factor.
[0051] Specifically, correcting the first temperature coefficient based on the change amount of the resistance values of the first resistor and the second resistor with respect to temperature may include: Determine a first proportional parameter based on the reference resistance value of the first resistor and the reference resistance value of the second resistor; Obtain a first actual value of the operating parameter based on the first proportional parameter and the measured value of the operating parameter; the measured value of the operating parameter is the value corresponding to the output signal of the operating parameter detection circuit; Determine a first resistance value of the first resistor based on the change amount of the resistance value of the first resistor with respect to temperature and the reference resistance value of the first resistor, and determine a second resistance value of the second resistor based on the change amount of the resistance value of the second resistor with respect to temperature and the reference resistance value of the second resistor; Determine a second proportional parameter of the operating parameter detection circuit based on the first resistance value of the first resistor and the second resistance value of the second resistor; Determine a second actual value of the operating parameter based on the second proportional parameter and the measured value of the operating parameter; Calculate the first temperature coefficient based on the first actual value of the operating parameter and the corresponding second actual value.
[0052] In this embodiment, the first resistor is a sampling resistor and the second circuit is a proportional resistor. Still taking the operating parameter of current as an example, as Figure 2 shown, it is the schematic diagram of the current detection circuit. The output signal of the current sensor LH1 is connected to the current detection circuit. Assume that the current signal output by the current sensor LH1 is , and the current signal is converted into a voltage signal through the resistor (sampling resistor). The voltage signal is amplified by the non-inverting proportional amplifier circuit composed of the operational amplifier U1A, the resistor , and the resistor (the resistor , and the resistor are proportional resistors). The addition circuit composed of the operational amplifier U1B superimposes the AC signal output by the operational amplifier U1A and the DC reference signal VREF, raises the AC signal output by the operational amplifier U1A above 0V, and the operational amplifier U1B outputs a voltage signal of 0 - 3V to the measurement and control unit. The voltage signal read by the measurement and control unit is .
[0053] Ideally, the calculation formula between the current signal (that is, the first actual value) and the voltage signal is:
[0054] Assume that the resistance value of the resistor is 100 ohms, and the resistance values of the resistor and the resistor are equal. It can be obtained that:
[0055] Therefore, it is obtained that:
[0056] Considering the actual use, the resistance value of the resistor will increase with the increase of temperature. The temperature drift coefficients of the selected sampling resistor and proportional resistor are both 25 ppm, that is, when the temperature rises or falls by 1 degree Celsius, the resistance value changes by 25 parts per million, and the resistance increases with the increase of temperature. Assume that the temperature rises by 10 °C, then the resistance value of the resistor changes by 250 parts per million, that is, 0.025 ohms. At this time, the calculation formula between the current signal (the second actual value) and the voltage signal uo is:
[0057] Thus, it is obtained that:
[0058] According to the current signal under ideal conditions and the actual current signal , the first temperature coefficient can be obtained as:
[0059] In this embodiment, the same method can be used to correct the second temperature coefficient and the third temperature coefficient. After correcting each temperature correction coefficient, a second signal can be sent to timely activate the protection module to protect the electrical equipment. Similarly, after correcting the second temperature coefficient, the first state of the second temperature coefficient can be modified to the second state, and after correcting the third temperature coefficient, the first state of the third temperature coefficient can be modified to the second state. The second state of the second temperature coefficient is used to indicate that the second temperature coefficient is normal. Accordingly, when the temperature of the power distribution terminal is within the second temperature range, the first signal is no longer sent to the protection module corresponding to the power distribution terminal. The second state of the third temperature coefficient is used to indicate that the third temperature coefficient is normal. Accordingly, when the temperature of the power distribution terminal is within the third temperature range, the first signal is no longer sent to the protection module corresponding to the power distribution terminal.
[0060] From the above, it can be concluded that in this embodiment, the second actual value is calculated based on the change amounts of the sampling resistor and the proportional resistor with temperature in the operating parameter detection circuit, and thus the first temperature coefficient is determined based on the ratio of the second actual value to the first actual value, which can realize the automatic correction of the first temperature coefficient and ensure the accuracy of the first temperature coefficient.
[0061] In an embodiment of the present disclosure, determining the first relative error between the first temperature coefficient and the second temperature coefficient includes: Determining the first relative error between the first temperature coefficient and the second temperature coefficient based on the first formula, and the first formula is:
[0062] Wherein, represents the first relative error, represents the first temperature coefficient, represents the second temperature coefficient.
[0063] In this embodiment, the first relative error is obtained by calculating the ratio of the absolute value of the difference between the first temperature coefficient and the second temperature coefficient to the second temperature coefficient. The first relative error provides a unified measurement standard for comparing temperature coefficients of different magnitudes, enabling the use of the same method to evaluate the differences in temperature coefficients under different distribution terminal devices, different working environments, or different measurement conditions, enhancing the comparability and universality of the evaluation results.
[0064] Corresponding to the method for testing the temperature coefficient of a distribution terminal in the above embodiment, Figure 3 FIG. is a structural block diagram of a device for testing the temperature coefficient of a distribution terminal provided by an embodiment of the present disclosure. For ease of description, only parts related to the embodiments of the present disclosure are shown. Refer to Figure 3 The device 20 for testing the temperature coefficient of a distribution terminal includes: an error calculation module 21 and an output control module 22.
[0065] Among them, the error calculation module 21 is configured to determine a first relative error between a first temperature coefficient and a second temperature coefficient in response to the temperature of the distribution terminal being within a first temperature range; The first temperature coefficient and the second temperature coefficient are used to correct the measured values of the distribution terminal in the corresponding temperature range, and the first temperature coefficient corresponds to the first temperature range; The output control module 22 is configured to send a first signal to the protection module corresponding to the distribution terminal in response to the first relative error exceeding an error threshold; The first signal is used to instruct the protection module to set the working state to a disabled state.
[0066] In an embodiment of the present disclosure, the output control module 22 is specifically configured to: Determine a second relative error between a second temperature coefficient and a third temperature coefficient; Send a first signal to the protection module corresponding to the distribution terminal in response to the second relative error not exceeding the error threshold.
[0067] In an embodiment of the present disclosure, the output control module 22 is specifically further configured to: Determine a third relative error between the first temperature coefficient and the third temperature coefficient in response to the second relative error exceeding the error threshold; Send a first signal to the protection module corresponding to the distribution terminal in response to the third relative error exceeding the error threshold.
[0068] In an embodiment of the present disclosure, the output control module 22 is specifically further configured to: Set the second temperature coefficient and the third temperature coefficient to a first state in response to both the second relative error and the third relative error exceeding the error threshold; The first state of the second temperature coefficient is used to indicate that when the temperature of the power distribution terminal is within the second temperature range, a first signal is sent to the protection module corresponding to the power distribution terminal; The first state of the third temperature coefficient is used to indicate that when the temperature of the power distribution terminal is within the third temperature range, a first signal is sent to the protection module corresponding to the power distribution terminal.
[0069] In an embodiment of the present disclosure, the output control module 22 is specifically configured to: In response to the first relative error exceeding the error threshold, determine the second relative error of the second temperature coefficient and the third temperature coefficient; In response to the second relative error exceeding the error threshold, determine the third relative error of the first temperature coefficient and the third temperature coefficient; In response to the third relative error not exceeding the error threshold, set the second temperature coefficient to the first state, and the first state is used to indicate that when the temperature of the power distribution terminal is within the second temperature range, a first signal is sent to the protection module corresponding to the power distribution terminal.
[0070] In an embodiment of the present disclosure, the output control module 22 is specifically configured to: Determine the change amount of the resistance values of the first resistor and the second resistor in the operation parameter detection circuit with respect to temperature based on the temperature of the power distribution terminal; correct the first temperature coefficient based on the change amount of the resistance values of the first resistor and the second resistor with respect to temperature, and send a second signal to the protection module corresponding to the power distribution terminal; The second signal is used to indicate that the protection module sets its working state to the enabled state.
[0071] In an embodiment of the present disclosure, the error calculation module 21 is specifically configured to: Determine the first relative error of the first temperature coefficient and the second temperature coefficient based on the first formula, and the first formula is:
[0072] Wherein, represents the first relative error, represents the first temperature coefficient, represents the second temperature coefficient.
[0073] See Figure 4 , Figure 4 is a schematic block diagram of an electronic device provided by an embodiment of the present disclosure. As Figure 4The electronic device 300 in the present embodiment shown may include: one or more processors 301, one or more input devices 302, one or more output devices 303, and one or more memories 304. The above-mentioned processors 301, input devices 302, output devices 303, and memories 304 communicate with each other through a communication bus 305. The memory 304 is used to store a computer program, and the computer program includes program instructions. The processor 301 is used to execute the program instructions stored in the memory 304. Among them, the processor 301 is configured to call the program instructions to execute the functions of each module / unit in the above-mentioned device embodiments, for example Figure 3 the functions of the error calculation module 21 and the output control module 22 shown.
[0074] It should be understood that in the embodiments of the present disclosure, the so-called processor 301 may be a central processing unit (CPU), and this processor may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or this processor may also be any conventional processor, etc.
[0075] The input device 302 may include a touchpad, a fingerprint acquisition sensor (for acquiring the fingerprint information and the direction information of the fingerprint of the user), a microphone, etc., and the output device 303 may include a display (such as an LCD), a speaker, etc.
[0076] The memory 304 may include a read-only memory and a random access memory, and provide instructions and data to the processor 301. A part of the memory 304 may also include a non-volatile random access memory. For example, the memory 304 may also store information about the device type.
[0077] In specific implementation, the processors 301, input devices 302, and output devices 303 described in the embodiments of the present disclosure may implement the implementation manners described in the first embodiment and the second embodiment of the power distribution terminal temperature coefficient inspection method provided by the embodiments of the present disclosure, and may also implement the implementation manner of the electronic device described in the embodiments of the present disclosure, which will not be elaborated here.
[0078] In another embodiment of the present disclosure, a computer-readable storage medium is provided. The computer-readable storage medium stores a computer program, and the computer program includes program instructions. When the program instructions are executed by a processor, all or part of the processes in the methods of the above embodiments are implemented. It can also be completed by instructing related hardware through the computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the above method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file, or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disc, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal, and software distribution medium, etc.
[0079] The computer-readable storage medium can be an internal storage unit of the electronic device in any of the foregoing embodiments, such as the hard disk or memory of the electronic device. The computer-readable storage medium can also be an external storage device of the electronic device, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc. equipped on the electronic device. Further, the computer-readable storage medium can also include both the internal storage unit and the external storage device of the electronic device. The computer-readable storage medium is used to store the computer program and other programs and data required by the electronic device. The computer-readable storage medium can also be used to temporarily store the data that has been output or will be output.
[0080] Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present disclosure.
[0081] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described electronic devices and units can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.
[0082] In several embodiments provided by this application, it should be understood that the disclosed electronic devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed couplings or direct couplings or communication connections between each other can be indirect couplings or communication connections through some interfaces or units, or can also be electrical, mechanical or other forms of connection.
[0083] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiments of the present disclosure.
[0084] In addition, each functional unit in various embodiments of the present disclosure can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.
[0085] The above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.
Claims
1. A method for testing the temperature coefficient of a distribution terminal, characterized in that Including: In response to the temperature of the distribution terminal being within the first temperature range, determining a first relative error between a first temperature coefficient and a second temperature coefficient; The first temperature coefficient and the second temperature coefficient are used to correct the measured values of the distribution terminal within the corresponding temperature range, and the first temperature coefficient corresponds to the first temperature range; In response to the first relative error exceeding an error threshold, sending a first signal to a protection module corresponding to the distribution terminal; The first signal is used to instruct the protection module to set its working state to a disabled state.
2. The temperature coefficient inspection method for a power distribution terminal according to claim 1, wherein The step of, in response to the first relative error exceeding the error threshold, sending a first signal to a protection module corresponding to the distribution terminal includes: Determining a second relative error between a second temperature coefficient and a third temperature coefficient; In response to the second relative error not exceeding the error threshold, sending the first signal to a protection module corresponding to the distribution terminal.
3. The temperature coefficient inspection method for a power distribution terminal according to claim 2, wherein, The step of, in response to the first relative error exceeding the error threshold, sending a first signal to a protection module corresponding to the distribution terminal further includes: In response to the second relative error exceeding the error threshold, determining a third relative error between the first temperature coefficient and the third temperature coefficient; In response to the third relative error exceeding the error threshold, sending the first signal to a protection module corresponding to the distribution terminal.
4. The temperature coefficient inspection method for a power distribution terminal according to claim 3, characterized in that, Also including: In response to both the second relative error and the third relative error exceeding the error threshold, setting the second temperature coefficient and the third temperature coefficient to a first state; The first state of the second temperature coefficient is used to indicate that when the temperature of the distribution terminal is within the second temperature range, sending the first signal to a protection module corresponding to the distribution terminal; The first state of the third temperature coefficient is used to indicate that when the temperature of the distribution terminal is within the third temperature range, sending the first signal to a protection module corresponding to the distribution terminal.
5. The temperature coefficient inspection method for a power distribution terminal according to claim 1, characterized in that The step of, in response to the first relative error exceeding the error threshold, sending a first signal to a protection module corresponding to the distribution terminal includes: In response to the first relative error exceeding the error threshold, determining a second relative error between a second temperature coefficient and a third temperature coefficient; In response to the second relative error exceeding the error threshold, determining a third relative error between the first temperature coefficient and the third temperature coefficient; In response to the third relative error not exceeding the error threshold, setting the second temperature coefficient to the first state, where the first state is used to indicate that when the temperature of the distribution terminal is within the second temperature range, sending the first signal to a protection module corresponding to the distribution terminal.
6. The temperature coefficient inspection method for a power distribution terminal according to claim 1, characterized in that After sending the first signal to a protection module corresponding to the distribution terminal, the method for testing the temperature coefficient of the distribution terminal further includes: Based on the temperature of the distribution terminal, determining the temperature variation of the resistance values of a first resistor and a second resistor; both the first resistor and the second resistor are resistors in the operating parameter detection circuit of the distribution terminal; Based on the temperature variation of the resistance values of the first resistor and the second resistor, correcting the first temperature coefficient, and sending a second signal to a protection module corresponding to the distribution terminal; the second signal is used to instruct the protection module to set its working state to an enabled state.
7. The temperature coefficient inspection method of the power distribution terminal according to claim 1, characterized in that, Determining the first relative error of the first temperature coefficient and the second temperature coefficient includes: Determining the first relative error of the first temperature coefficient and the second temperature coefficient based on a first formula, where the first formula is: Wherein, represents the first relative error, represents the first temperature coefficient, represents the second temperature coefficient.
8. A temperature coefficient inspection device for a distribution terminal, characterized in that, Including: An error calculation module, configured to determine the first relative error of the first temperature coefficient and the second temperature coefficient in response to the temperature of the power distribution terminal being within a first temperature range; The first temperature coefficient and the second temperature coefficient are used to correct the measured values of the power distribution terminal in corresponding temperature ranges, and the first temperature coefficient corresponds to the first temperature range; An output control module, configured to send a first signal to the protection module corresponding to the power distribution terminal in response to the first relative error exceeding an error threshold; The first signal is used to instruct the protection module to set the working state to a disabled state.
9. An electronic device, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that, When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.
10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, the steps of the method according to any one of claims 1 to 7 are implemented.