A multifunctional power system protection and control circuit breaker device

Abstract

The present invention relates to the technical field of protecting circuit breakers, and specifically relates to a multifunctional power system protection and control circuit breaker device. The device includes: a load monitoring module, a load distribution optimization module, a thermal stability analysis module, a response adjustment module, and a performance verification module. In the present invention, by comprehensively analyzing a combination of multiple monitoring data, the accuracy of abnormal current and voltage identification is improved, false tripping and over-response are avoided, system safety is ensured, and when optimizing load distribution, based on real-time power distribution and equipment limits, the utilization rate of equipment resources and energy efficiency are improved. Temperature rise control prevents equipment damage caused by overheating by dynamically adjusting load distribution, enhances operation stability, and the real-time response adjustment mechanism ensures the flexibility and adaptability of power distribution, reduces energy loss during operation, and at the same time improves the overall operation efficiency of the power system through efficient monitoring.

Description

Technical Field

[0001] The present invention relates to the technical field of protective circuit breakers, and in particular, to a multifunctional power system protection and control circuit breaker device. Background Art

[0002] The technical field of protective circuit breakers involves the design and application of protection and control equipment in power systems. The core content of this field is to detect abnormal or fault states in power systems and quickly isolate the fault points to protect the safe operation of equipment and lines. The overall technical field covers the classification, design, manufacturing of power protection devices and their applications in different power scenarios, such as short-circuit protection, overload protection, and interlocking control with other electrical equipment. These technical fields focus on improving reliability and response speed, and achieve comprehensive protection of power systems by optimizing electrical structures, detection methods, and response mechanisms.

[0003] Among them, the multifunctional power system protection and control circuit breaker device refers to a device that can achieve comprehensive protection and control functions in a power system. For abnormal situations such as short circuits, overloads, and overcurrents in the power system, through the built-in current detection unit and breaking device, it realizes the rapid cut-off of abnormal current and system protection, and completes real-time status monitoring and fault identification through digital control technology. Specific technical means include using high-precision current sensors for real-time data acquisition, performing precise circuit breaking operations through preset response logics, and combining fast breaking mechanisms to ensure the safety and stability of power equipment and systems.

[0004] In the prior art, the data acquisition granularity in current and voltage detection is insufficient, resulting in difficulty in accurately responding to subtle changes in abnormalities. The load distribution mechanism fails to fully consider power limits and equipment status, easily leading to resource allocation imbalance or overload problems. The limitations of temperature rise control make the system unable to maintain stability under high load or environmental temperature changes, posing a risk of equipment damage. The response mechanism is not comprehensive in real-time status monitoring and has a lag in adjustment, increasing system energy consumption and operation risks, especially showing obvious shortcomings in complex power system scenarios. Summary of the Invention

[0005] The purpose of the present invention is to solve the drawbacks existing in the prior art, and to propose a multifunctional power system protection and control circuit breaker device.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions: A multifunctional power system protection and control circuit breaker device includes:

[0007] The load monitoring module collects and integrates the line current based on the current sensor built in the circuit breaker, calculates the line current measurement ratio in combination with the rated current value of the overcurrent protection unit, calculates the voltage deviation in combination with the output of the voltage detection unit, screens abnormal voltages according to the set threshold, and generates line current-voltage ratio distribution data;

[0008] The load distribution optimization module calculates the power distribution rate of multiple lines based on the line current-voltage ratio distribution data and in combination with the contact component state of the circuit breaker, compares it with the equipment power limit value, removes the distribution rate that exceeds the set value, and re-optimizes the load distribution in combination with the thermal power data to generate a power adjustment distribution plan;

[0009] The thermal stability analysis module calculates the impact of the load distribution on the temperature rise based on the power adjustment distribution plan and using the temperature rise record of the short-circuit detection module, compares it with the temperature rise limit value of the equipment, removes the configurations that do not meet the thermal stability, recalculates the load distribution, and generates a thermally stable load distribution value;

[0010] The response adjustment module detects the real-time state of the breaking mechanism based on the thermally stable load distribution value, calculates the deviation between the current load and the set value, compares the deviation with the overcurrent limit value, adjusts the load distribution, and completes the correction according to the contact separation position to generate a real-time load response ratio;

[0011] The performance verification module monitors the operating state of the circuit breaker action control loop based on the real-time load response ratio, calculates the power loss and the equipment capacity utilization rate, compares with the set operating efficiency threshold, screens the operating configurations that meet the conditions, and generates an optimized operating efficiency value for the circuit breaker.

[0012] The line current-voltage ratio distribution data includes line current collection, overcurrent protection unit, voltage deviation, and abnormal voltage screening. The power adjustment distribution plan specifically includes multi-line power distribution rate, equipment power limit value, and thermal power data. The thermally stable load distribution value specifically refers to temperature rise record, load distribution impact, and temperature rise limit value. The real-time load response ratio includes load deviation, overcurrent limit value, and contact separation position correction. The optimized operating efficiency value of the circuit breaker specifically includes power loss, equipment capacity utilization rate, and operating efficiency threshold.

[0013] As a further solution of the present invention, the steps for obtaining the line current-voltage ratio distribution data are specifically as follows:

[0014] Call the original current data output by the line current collection unit, calculate the line current measurement ratio in combination with the rated current value of the overcurrent protection unit, perform point-by-point comparison and judgment through the difference between the measurement ratio and the rated ratio, mark the sampling points whose deviation range exceeds the set standard, extract the abnormal line current sampling point data, and generate the line current measurement ratio analysis result;

[0015] Call the original voltage data output by the voltage detection unit, screen the abnormal voltage sampling points by comparing point by point with the set threshold, calculate the difference between the abnormal voltage and the rated voltage, count the abnormal voltage fluctuation distribution data, analyze the voltage deviation characteristics based on the distribution data, and generate the abnormal voltage screening result;

[0016] Combine the line current measurement ratio analysis result and the abnormal voltage screening result, calculate the line current-voltage ratio distribution, generate the result through the weight correction of the ratio distribution, and use the formula:

[0017]

[0018] Generate the line current-voltage ratio distribution result;

[0019] Among them, R represents the line current-voltage ratio distribution result, I i represents the line current value at the i-th sampling point, I rated represents the rated current value of the overcurrent protection unit, V i represents the voltage value at the i-th sampling point, V rated represents the rated voltage value, w i represents the weight parameter at the i-th sampling point, which is used to correct the influence of the abnormal point on the overall distribution, and n represents the total number of sampling points.

[0020] As a further solution of the present invention, the steps for obtaining the power adjustment distribution scheme are specifically as follows:

[0021] Based on the line current-voltage ratio distribution data, combine the state of the breaker contact assembly, calculate the power distribution rate of multiple lines, calculate the distribution by using the ratio of the line power value to the equipment power limit value, mark the abnormal distribution points, and obtain the preliminary power distribution analysis result;

[0022] Compare the preliminary power distribution analysis result with the equipment power limit value point by point, mark the power distribution points exceeding the set limit point by point, calculate the total power proportion of the exceeding points, and regenerate the marked power distribution data after removing the over-limit distribution points;

[0023] Extract the distribution points after removing the over-limit points from the marked power distribution data, combine the equipment thermal power output range to calculate the adjustment factor, re-optimize the load distribution of each distribution point, and generate the optimized load distribution result;

[0024] Combine the optimized load distribution result, recalculate the power distribution rate, and use the formula:

[0025]

[0026] Generate the power adjustment distribution scheme;

[0027] Among them, P adj represents the adjusted power distribution scheme, and P i represents the power value of the i-th line, and P max represents the equipment power limit value, and W i represents the weight factor adjusted according to the thermal power data of the i-th line, and n represents the total number of lines.

[0028] As a further solution of the present invention, the steps for obtaining the thermal stability load distribution value are specifically as follows:

[0029] Based on the power adjustment distribution scheme, using the temperature rise records of the short-circuit detection module, calculate the temperature rise value of each load configuration, identify the correlation between the temperature rise change and the load configuration by analyzing the influence of multiple configured load amounts on the temperature rise point by point, extract the temperature rise influence data after correlation analysis, and generate a preliminary temperature rise influence analysis result;

[0030] Compare the preliminary temperature rise influence analysis result with the temperature rise limit value of the equipment point by point, identify the load configurations exceeding the limit value, calculate the distribution data of the remaining configurations by excluding the configurations, and regenerate the load configuration adjustment result to obtain the adjusted load configuration data;

[0031] Combined with the adjusted load configuration data, calculate the current load distribution, reduce the overall temperature rise, and use the formula:

[0032]

[0033] Generate the thermal stability load distribution value;

[0034] Among them, T adj represents the thermal stability load distribution value, and Q i represents the load amount of the i-th configuration, and Q max represents the maximum safe load amount, and R i represents the temperature rise coefficient of the i-th configuration, and n represents the total number of configurations.

[0035] As a further solution of the present invention, the steps for obtaining the real-time load response ratio are specifically as follows:

[0036] Call the thermal stability load distribution value, detect the real-time state of the breaking mechanism, calculate the difference from the set load value by extracting the real-time load data, analyze the deviation range between the current load and the set value in a point-by-point comparison manner, screen the points with deviations exceeding the limit value and record the results, and generate the current load deviation data;

[0037] Call the current load deviation data, compare it with the overcurrent limit value point by point, mark the load points with deviation exceeding the limit and exclude them, reorganize the remaining load configurations and adjust the distribution ratio, and generate the corrected load distribution data;

[0038] Combined with the corrected load distribution data and the contact separation position data, analyze the influence of the contact separation position on the load distribution. By correcting the response ratio of each load point, use the formula:

[0039]

[0040] Calculate and generate the real-time load response ratio;

[0041] Among them, R real represents the real-time load response ratio, L i represents the current load value of the i-th configuration, L set represents the corresponding set load value, P i represents the correlation coefficient between the load and the contact separation position, C i represents the weight correction factor of the contact state, and n represents the total number of configurations.

[0042] As a further solution of the present invention, the steps for obtaining the optimized operation efficiency value of the circuit breaker are specifically as follows:

[0043] Based on the real-time load response ratio, monitor the operation state of the circuit breaker action control loop. By analyzing the real-time load response value of each configuration and its operation state, extract the power loss data, calculate the power loss ratio of each configuration, and generate the power loss data;

[0044] Call the power loss data and compare it point by point with the capacity utilization rate of the device. By judging whether the operation efficiency of the configuration reaches the set threshold, screen the operation configurations that meet the conditions, eliminate the configurations that do not meet the conditions and reorganize the distribution, and generate the operation configuration data that meets the conditions;

[0045] Combined with the operation configuration data that meets the conditions, analyze the power optimization potential of the operation state. By redistributing the load ratio and calculating the comprehensive optimization efficiency, comprehensively evaluate the operation performance based on the device capacity and power loss, using the formula:

[0046]

[0047] Calculate the comprehensive optimization efficiency value and generate the optimized operation efficiency value of the circuit breaker;

[0048] Among them, E opt represents the comprehensive optimization efficiency value, P used,i represents the power usage of the i-th configuration, W i represents the capacity weight factor of the i-th configuration, C i represents the power loss coefficient of the i-th configuration, n represents the total number of configurations, U j represents the voltage value of the j-th operation state, U maxrepresents the maximum operating voltage of the system, and m represents the total number of operating states.

[0049] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0050] In the present invention, by comprehensively analyzing multiple monitoring data, the accuracy of abnormal current and voltage identification is improved, false tripping and over-response are avoided, and the system safety is ensured. When optimizing the load distribution, based on the real-time power distribution and equipment limits, the utilization rate of equipment resources and energy efficiency are improved. The temperature rise control dynamically adjusts the load distribution to prevent equipment damage caused by overheating and enhances the operation stability. The real-time response adjustment mechanism ensures the flexibility and adaptability of power distribution, reduces the energy loss during operation, and at the same time improves the overall operation efficiency of the power system through efficient monitoring. Description of the Drawings

[0051] Figure 1 is the device flow chart of the present invention;

[0052] Figure 2 is the flow chart of the acquisition steps of the line current-voltage ratio distribution data of the present invention;

[0053] Figure 3 is the flow chart of the acquisition steps of the power adjustment distribution scheme of the present invention;

[0054] Figure 4 is the flow chart of the acquisition steps of the thermal stability load distribution value of the present invention;

[0055] Figure 5 is the flow chart of the acquisition steps of the real-time load response ratio of the present invention;

[0056] Figure 6 is the flow chart of the acquisition steps of the optimized operation efficiency value of the circuit breaker of the present invention. Detailed Embodiments

[0057] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0058] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, in the description of the present invention, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0059] Embodiment 1

[0060] Please refer to Figure 1 , a multifunctional power system protection and control circuit breaker device includes:

[0061] The load monitoring module collects and integrates line current based on the current sensor built in the circuit breaker, calculates the line current measurement ratio in combination with the rated current value of the overcurrent protection unit, calculates the voltage deviation in combination with the output of the voltage detection unit, screens abnormal voltages according to the set threshold, and generates line current voltage ratio distribution data;

[0062] The load distribution optimization module calculates the power distribution rate of multiple lines based on the line current voltage ratio distribution data, combines the state of the contact assembly of the circuit breaker, compares it with the equipment power limit value, removes the distribution rate that exceeds the set value, combines the thermal power data, re-optimizes the load distribution, and generates a power adjustment distribution plan;

[0063] The thermal stability analysis module calculates the impact of the load distribution on the temperature rise based on the power adjustment distribution plan and the temperature rise record of the short-circuit detection module, compares it with the temperature rise limit value of the equipment, removes the configurations that do not meet the thermal stability, recalculates the load distribution, and generates a thermally stable load distribution value;

[0064] The response adjustment module detects the real-time state of the breaking mechanism based on the thermally stable load distribution value, calculates the deviation between the current load and the set value, compares the deviation with the overcurrent limit value, adjusts the load distribution, completes the correction according to the contact separation position, and generates a real-time load response ratio;

[0065] The performance verification module monitors the operating state of the circuit breaker action control loop based on the real-time load response ratio, calculates the power loss and the equipment capacity utilization rate, compares it with the set operating efficiency threshold, screens the operating configurations that meet the conditions, and generates an optimized operating efficiency value of the circuit breaker.

[0066] The line current-voltage ratio distribution data includes line current acquisition, overcurrent protection unit, voltage deviation, abnormal voltage screening. The specific power adjustment distribution plan is the multi-line power distribution rate, equipment power limit, and thermal power data. The specific thermal stability load distribution value refers to the temperature rise record, load distribution impact, and temperature rise limit. The real-time load response ratio includes load deviation, overcurrent limit value, and contact separation position correction. The specific value of the optimized operating efficiency of the circuit breaker is power loss, equipment capacity utilization rate, and operating efficiency threshold.

[0067] Please refer to Figure 2 , and the specific steps for obtaining the line current-voltage ratio distribution data are as follows:

[0068] Call the original current data output by the line current acquisition unit, combine the rated current value of the overcurrent protection unit, calculate the line current measurement ratio, make a point-by-point comparison and judgment through the difference between the measurement ratio and the rated ratio, mark the sampling points where the deviation range exceeds the set standard, extract the data of abnormal line current sampling points, and generate the analysis result of the line current measurement ratio;

[0069] Segment the line current data according to the time series, count the average value and standard deviation of the line current values within each segment, combine the rated current value of the overcurrent protection unit, calculate the line current measurement ratio point by point, analyze the distribution characteristics of high-frequency fluctuation points through the time series characteristics of the ratio, compare the deviation values between the measurement ratio and the rated ratio of the high-frequency fluctuation points one by one, use the range characteristics of the deviation distribution to mark the sampling points that exceed the set standard, and extract the marked sampling points as abnormal line current points to generate the analysis result of the line current measurement ratio.

[0070] Call the original voltage data output by the voltage detection unit, screen the abnormal voltage sampling points through point-by-point comparison with the set threshold, calculate the difference between the abnormal voltage and the rated voltage, count the abnormal voltage fluctuation distribution data, and analyze the voltage deviation characteristics according to the distribution data to generate the abnormal voltage screening result;

[0071] Perform multi-stage processing according to the voltage deviation characteristics. Divide the voltage data into several segments according to the measurement time, calculate the statistical characteristics of the voltage values within each segment, calculate the average deviation and standard deviation of the voltage values, mark the abnormal segments according to the deviation characteristics of each segment, screen the marked abnormal segments through the set threshold, calculate the difference between the abnormal voltage value and the rated voltage value within each segment, generate the statistical data of the fluctuation distribution of the abnormal voltage and the rated voltage, analyze the fluctuation characteristics according to the statistical results, extract the segments with significantly abnormal distributions, and generate the abnormal voltage screening result.

[0072] Combine the line current measurement ratio analysis result and the abnormal voltage screening result, calculate the line current-voltage ratio distribution, generate the result through weight correction of the ratio distribution, and use the formula:

[0073]

[0074] Generate the line current-voltage ratio distribution result;

[0075] Wherein, R represents the line current-voltage ratio distribution result, I i represents the line current value at the i-th sampling point, I rated represents the rated current value of the overcurrent protection unit, V i represents the voltage value at the i-th sampling point, V rated represents the rated voltage value, w i represents the weight parameter at the i-th sampling point, which is used to correct the influence of abnormal points on the overall distribution, and n represents the total number of sampling points.

[0076] Formula:

[0077]

[0078] The advantage of the formula is that by combining the ratio relationship between the line current and voltage, the weight parameter is introduced to correct the influence of abnormal points on the overall distribution, so as to more accurately reflect the line current-voltage ratio distribution characteristics.

[0079] Detailed explanation of the formula and the formula calculation derivation process:

[0080] In the formula, R represents the line current-voltage ratio distribution result, I i represents the line current value at the i-th sampling point, which is obtained through the line current acquisition unit, I rated represents the rated current value of the overcurrent protection unit, which is provided by the device parameter setting, V i represents the voltage value at the i-th sampling point, which is obtained through the voltage detection unit, V rated represents the rated voltage value, which is provided by the device calibration parameters, w i represents the weight parameter at the i-th sampling point, which is obtained by calculating the deviation degree of the abnormal point, and n represents the total number of sampling points, which is calculated through the sampling frequency and time period.

[0081] In the parameter assignment, assume I i = 100, 120, 110, 115 (unit: A), I rated = 150 (unit: A), V i = 220, 230, 225, 235 (unit: V), V rated = 240 (unit: V), w i = 0.8, 1.0, 0.9, 0.85, n = 4.

[0082] The specific calculation process is as follows:

[0083]

[0084] Calculate the numerator part item by item:

[0085]

[0086] Denominator part calculation:

[0087] 0.8 + 1.0 + 0.9 + 0.85 = 3.55;

[0088] Final result calculation:

[0089]

[0090] This result indicates that the line current - voltage ratio distribution value is 0.141. This result is used to determine whether the line current - voltage fluctuation is within the normal range, and the electrical characteristic distribution of the line is obtained by combining with the analysis of the fluctuation range.

[0091] Please refer to Figure 3 , and the specific steps for obtaining the power adjustment distribution scheme are as follows:

[0092] Based on the line current - voltage ratio distribution data, combined with the state of the circuit breaker contact assembly, calculate the power distribution rate of multiple lines. Calculate the distribution using the ratio of the line power value to the equipment power limit value, mark the abnormal distribution points, and obtain the preliminary power distribution analysis result;

[0093] First, obtain the current data of each line from the line current acquisition unit, and calculate the line current - voltage ratio distribution through the ratio of current to voltage. Then, according to the state data of the contact assembly of the circuit breaker, combined with its corresponding current - carrying capacity, contact resistance, and mechanical wear conditions, calculate the power distribution rate of each line. The calculation formula for the power distribution rate is: P i = I i × V i × η i , where P i is the power distribution value of the i - th line, I i is the current value of the i - th line, V i is the voltage value of the i - th line, η i is the line power factor, which represents the power loss ratio of the line and is obtained based on the load and efficiency parameters of the equipment. It can be dynamically adjusted through the historical data and real - time monitoring results of the equipment, and then the basic data of power distribution is obtained. In this process, the current and voltage data are collected in real - time through sensors, while the power factor is evaluated according to the changes in the service life, maintenance status, and working environment of the equipment. According to the calculated power distribution rate, it can be further compared with the equipment power limit value, and the line points exceeding the set threshold are marked to obtain the preliminary power distribution analysis result.

[0094] Compare the preliminary power distribution analysis results with the equipment power limit point by point, mark the power distribution points that exceed the set limit point by point, calculate the total power ratio of the exceeded points, and regenerate the marked power distribution data after removing the exceeded distribution points;

[0095] By calculating the ratio of the power ratio of each line to the rated power of the equipment, using the formula:

[0096] Where, Power Ratio i is the power ratio of the i-th line, P i is the power value of the i-th line, P rated is the rated power value of the equipment, which is set according to the equipment type and the technical specifications of the manufacturer. Through the calculated ratio, it can be further judged whether the power of each line exceeds the safe operating range of the equipment. If it exceeds the set power limit, record it, mark it, and exclude the line that exceeds the limit, retain the line data that meets the specifications, generate the power distribution data, and the analysis results are used for the subsequent optimization of the load distribution and the establishment of the power adjustment plan.

[0097] Extract the distribution points after removing the exceeded points from the marked power distribution data, calculate the adjustment factor in combination with the equipment thermal power output range, and re-optimize the load distribution of each distribution point to generate the optimized load distribution result;

[0098] Determined by the difference between the actual operating temperature and the rated operating temperature of the equipment. When calculating, the following formula can be applied: Where, η i represents the adjustment factor of the i-th line, T work is the actual operating temperature of the equipment, T rated is the rated operating temperature of the equipment. According to the heat dissipation capacity and load conditions of the equipment, obtain the thermal power adjustment factor of each line, and then re-optimize the load distribution, distribute the adjusted power to each line, and generate the optimized load distribution result, which ensures that under the thermal power conditions, the power distribution of each line meets the maximum load capacity and heat dissipation requirements of the equipment.

[0099] Combined with the optimized load distribution result, recalculate the power distribution rate, using the formula:

[0100]

[0101] Generate the power adjustment distribution plan;

[0102] Where, P adj represents the adjusted power distribution plan, P i represents the power value of the i-th line, P maxRepresents the device power limit, in W i Represents the weight factor adjusted according to the thermal power data for the i-th line, where n represents the total number of lines.

[0103] Formula:

[0104]

[0105] The benefit of the formula is that by adding the adjustment factor W i , precise adjustment of the load distribution for each line can be achieved, ensuring that the power distribution of each line does not exceed the maximum load-bearing capacity of the device power, and further optimizing the load distribution among lines according to the thermal power output.

[0106] Detailed explanation of the formula and the derivation process of formula calculation:

[0107] In this formula, P adj is the adjusted power distribution scheme, P i is the power value of the i-th line, P max is the device power limit, W i is the weight factor of the i-th line, used to adjust the power proportion of each line. The weight factor will be dynamically calculated according to the changes in the working temperature, load, and device power factor of each line. For example, assume P1 = 50W, P2 = 70W, P max = 100W, and according to the current thermal power situation of the device, W1 = 0.8 and W2 = 1.2. Then, by substituting into the formula, the adjusted power distribution value is obtained as:

[0108]

[0109] This result indicates that the adjusted power distribution value is 1.24, indicating that under the maximum power limit of the device, the power distribution scheme after load optimization already meets the requirements.

[0110] Please refer to Figure 4 , and the specific steps for obtaining the thermally stable load distribution value are as follows:

[0111] Based on the power adjustment distribution scheme, using the temperature rise records of the short-circuit detection module, calculate the temperature rise value of each load configuration. By analyzing the influence of multiple configured load amounts on the temperature rise point by point, identify the correlation between the temperature rise change and the load configuration, extract the temperature rise influence data after correlation analysis, and generate a preliminary temperature rise influence analysis result;

[0112] First, obtain the temperature rise values of each load configuration. By collecting the temperature rise data under different load configurations and then comparing each configuration, analyze the relationship between the load and the temperature rise. For example, assume the temperature rise under a certain load configuration A is 45°C, while the temperature rise under configuration B is 55°C. These data will be evaluated through comparison. Then, compare the temperature rise values of each configuration with the standard temperature rise limit of the device. For example, if the set temperature rise limit is 50°C, it is found that the temperature rise of configuration A is lower than the limit, while that of configuration B exceeds the limit. After that, according to the temperature rise limit of the device, remove the load configurations whose temperature rises exceed the limit. For example, if the temperature rise of configuration B exceeds the limit value of 50°C, then this configuration will be excluded, while configuration A meets the thermal stability requirements. In this way, filter out the configuration data that meets the standards, further optimize its load distribution, generate the adjusted data after screening, ensure that the load configuration meets the thermal stability requirements, and obtain a suitable load distribution result.

[0113] Compare the preliminary analysis results of the temperature rise impact with the temperature rise limit of the device point by point, identify the load configurations that exceed the limit, calculate the distribution data of the remaining configurations by removing the configurations, and regenerate the adjusted results of the load configuration to obtain the adjusted load configuration data;

[0114] By combining the analysis results of the temperature rise impact with the temperature rise limit of the device, compare the temperature rise values of each load configuration with the maximum temperature rise limit of the device one by one. If it is found that the temperature rise of a certain configuration exceeds the limit, immediately remove and adjust it to ensure that all the remaining configurations are within the safe temperature rise range. Assume that for a certain load configuration C, the temperature rise is 60°C, which exceeds the temperature rise limit of the device of 50°C, then configuration C will be removed. At this time, by adjusting and optimizing the temperature rise of each remaining configuration, avoid the continued existence of configurations that do not meet the thermal stability, so as to ensure that the temperature rise of the entire system remains within the allowable range of the device. Then, we will further analyze the remaining load configurations and optimize them by adjusting the weight factors of the load distribution to ensure that each configuration operates within the optimal temperature rise range. Obtain a dataset of load configurations that meet the requirements adjusted according to the optimized data.

[0115] Combine the adjusted load configuration data, calculate the current load distribution, and reduce the overall temperature rise, using the formula:

[0116]

[0117] Generate the thermally stable load distribution value;

[0118] where, T adj represents the thermally stable load distribution value, Q i represents the load of the i-th configuration, Q max represents the maximum safe load, R iThe temperature rise coefficient representing the i-th configuration, and n represents the total number of configurations.

[0119] Formula:

[0120]

[0121] Detailed explanation of the formula and the derivation process of formula calculation:

[0122] In this formula, T adj represents the thermal stability load distribution value, Q i is the load of the i-th load configuration, Q max represents the maximum safe load of the device, R i is the temperature rise coefficient of the i-th load configuration, and n represents the number of load configurations. When calculating, first compare the load of each load configuration with the maximum load of the device. Assume that Q1 of load configuration 1 = 80 units, and the maximum load of the device Q max = 100 units, and the load ratio is obtained as Then calculate the temperature rise coefficient R1 for this configuration. Assume the temperature rise coefficient is 1.2, and the contribution of this item is:

[0123] 0.8 × 1.2 = 0.96;

[0124] Similarly, the calculation processes of other configurations will also be carried out in this way. By summing up the results of all configurations, the total temperature rise influence value is obtained. Select the minimum temperature rise value to ensure that the system reaches a thermally stable load distribution.

[0125] This result shows that through the reasonable weighting of load configuration and temperature rise coefficient, the optimized load distribution will optimize the thermal stability of the device, effectively reduce the load in the high-temperature area of the system, ensure the safe operation of the device, and reduce the risks caused by excessive temperature rise.

[0126] Please refer to Figure 5 , and the specific steps for obtaining the real-time load response ratio are as follows:

[0127] Call the thermal stability load distribution value, detect the real-time state of the breaking mechanism, calculate the difference between the real-time load data and the set load value by extracting the real-time load data, analyze the deviation range between the current load and the set value by using the point-by-point comparison method, screen the points with deviations exceeding the limit value and record the results to generate the current load deviation data;

[0128] Extract the real-time state data of the breaking mechanism, calculate the current load deviation by monitoring the difference between the real-time load data and the set load value. First, call the real-time monitoring module to obtain the real-time load value L i , and compare L i with the preset set load value L set point by point, and based on the difference calculation formula ΔL = Li -L set Calculate the load deviation, then compare the difference data with the allowable deviation range of the device, mark the over-limit deviation points by setting a threshold interval, calculate the proportion of the deviation at the points beyond the set range and eliminate these points, recheck the rationality of the load value through the data after elimination to ensure that the remaining load configuration is within the acceptable range, and generate the current load deviation data.

[0129] Call the current load deviation data, compare it point by point with the over-current limit value, mark and eliminate the load points with over-limit deviation, reorganize the remaining load configuration and adjust the allocation ratio to generate the corrected load allocation data;

[0130] Compare the deviation results point by point with the over-current limit value of the device, eliminate the load points with over-limit deviation by point-by-point judgment and reconfigure the load allocation ratio. First, calculate the relative proportion of each load point based on the deviation data, and use to quantify the deviation degree of each point. Then compare the quantified deviation data with the over-current limit value threshold I limit point by point, determine whether the relative proportion is over-limit, mark the over-limit load points and call the data of the remaining load points for reallocation, and adjust the load allocation ratio by calculating the distribution proportion formula of the remaining load to generate the corrected load allocation data.

[0131] Combine the corrected load allocation data and the contact separation position data, analyze the influence of the contact separation position on the load allocation, and correct the response ratio of each load point by using the formula:

[0132]

[0133] Calculate and generate the real-time load response ratio;

[0134] Among them, R real represents the real-time load response ratio, L i represents the current load value of the i-th configuration, L set represents the corresponding set load value, P i represents the correlation coefficient between the load and the contact separation position, C i represents the weight correction factor of the contact state, and n represents the total number of configurations.

[0135] Formula:

[0136]

[0137] The advantage of the formula is that by combining the current load value, the set load value, the correlation coefficient of the contact separation position, and the weight correction factor of the contact state, the real-time load response ratio is comprehensively calculated, which can dynamically reflect the actual matching degree between the load state and the characteristics of the breaking mechanism.

[0138] Detailed explanation of the formula and the derivation process of formula calculation:

[0139] L i = 95 A (obtained by real-time monitoring equipment for the current load value), L set = 100 A (obtained through preset data), P i = 1.1 (obtained by calculating the correlation coefficient through mechanical tests of the contact separation position), C i = 0.9 (weight correction factor generated through contact state analysis), n = 10 (obtained by counting the total number of loads configured in the system), and substitute into the formula for step-by-step calculation:

[0140]

[0141] The first step is to calculate the numerator part:

[0142]

[0143] After summation, the numerator part:

[0144] 10·0.945 = 9.45;

[0145] Calculate the denominator part:

[0146]

[0147] Calculate the ratio:

[0148]

[0149] This result indicates that the current load response ratio is 1.05, which means that the real-time load state is slightly higher than the set value but within the allowable range. Through this ratio, the load distribution scheme can be further corrected to ensure the stable operation of the breaking mechanism.

[0150] Please refer to Figure 6 , and the specific steps for obtaining the optimized operation efficiency value of the circuit breaker are as follows:

[0151] Based on the real-time load response ratio, monitor the operating state of the circuit breaker action control loop. By analyzing the real-time load response value of each configuration and its operating state, extract the power loss data, calculate the power loss ratio of each configuration, and generate the power loss data;

[0152] Analyze the load data of each operating state in the breaker action control loop, extract the real-time change trend of power loss one by one. By comparing the real-time record of the load response ratio with the operating state, obtain the real-time power data of each configuration, calculate the proportion of its power loss. For the extraction of power data, it is necessary to obtain the total power consumption of the breaker under each operating state and the power distribution of each configuration from the real-time monitoring module, through the calculation formula P used,i = P total ·R real,i where P total represents the current total power consumption of the breaker, and R real,i represents the load response ratio of the i-th configuration, ensure that the actual load of each configuration is optimized in the power distribution, verify the data validity by comparing with the operation record, and finally generate the power loss data.

[0153] Call the power loss data, compare it with the capacity utilization rate of the device point by point. By judging whether the configuration operation efficiency reaches the set threshold, screen the operating configurations that meet the conditions, eliminate the configurations that do not meet the conditions and reorganize the distribution, and generate the operating configuration data that meets the conditions;

[0154] By analyzing and evaluating the capacity utilization rate of the device, calculate the operation efficiency of each configuration one by one, and use the ratio of power loss to device capacity as a key indicator for comparison. The specific calculation of operation efficiency uses the formula where C total is the total capacity of the device, P used,i is the power usage of the i-th configuration. By screening the configurations that meet the set efficiency threshold, mark and eliminate the configurations that do not meet the conditions, reorganize the distribution of the remaining configurations, record the screening process in the device log, and verify the rationality of the final configuration item by item to generate the operating configuration data that meets the conditions.

[0155] Combined with the operating configuration data that meets the conditions, analyze the power optimization potential of the operating state. By redistributing the load ratio and calculating the comprehensive optimization efficiency, comprehensively evaluate the operating performance based on the device capacity and power loss, using the formula:

[0156]

[0157] Calculate the comprehensive optimization efficiency value and generate the optimized operating efficiency value of the breaker;

[0158] where, E opt represents the comprehensive optimization efficiency value, P used,i represents the power usage of the i-th configuration, W i represents the capacity weight factor of the i-th configuration, C i represents the power loss coefficient of the i-th configuration, n represents the total number of configurations, and U jThe voltage value representing the j-th operating state, U max represents the maximum operating voltage of the system, and m represents the total number of operating states.

[0159] Formula:

[0160]

[0161] The advantage of the formula is that by comprehensively evaluating the operating efficiency by combining the power consumption, capacity weight, and voltage stability, the overall optimization of the circuit breaker operating state is achieved.

[0162] Detailed explanation of the formula and the derivation process of the formula calculation:

[0163] 1. Obtain P used,i : Extract from the power data recorded in the operating state monitoring. Assume P used,1 = 50,

[0164] P used,2 = 60, P used,3 = 40;

[0165] 2. Obtain W i : According to the configured capacity weight, assume W1 = 0.5, W2 = 0.3, W3 = 0.2;

[0166] 3. Obtain C i : Extract from the equipment power loss data. Assume C1 = 20, C2 = 30, C3 = 25;

[0167] 4. Obtain U j and U max : Extract from the voltage monitoring record. Assume U1 = 220, U2 = 230, U3 = 240, U max = 240;

[0168] Derivation process:

[0169]

[0170]

[0171] The result shows that the comprehensive optimization efficiency value of the circuit breaker is 0.79, indicating that the current operating configuration has reached a good efficiency state, which is closely related to the optimized operating efficiency value of the circuit breaker and provides an important reference for the formulation of subsequent operating strategies.

[0172] The above are only the preferred embodiments of the present invention, and do not limit the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A multifunctional power system protection and control circuit breaker device, characterized in that, The device includes: Based on the current sensor built in the circuit breaker, the load monitoring module collects and integrates the line current, combines with the rated current value of the overcurrent protection unit to calculate the line current measurement ratio, and at the same time combines with the output of the voltage detection unit to calculate the voltage deviation, screens abnormal voltages according to the set threshold, and generates line current-voltage ratio distribution data; Based on the line current-voltage ratio distribution data, the load distribution optimization module combines with the contact component state of the circuit breaker to calculate the power distribution rate of multiple lines, compares it with the equipment power limit value, removes the distribution rate that exceeds the set value, combines with the thermal power data, and re-optimizes the load distribution to generate a power adjustment distribution plan; The specific steps for obtaining the power adjustment distribution plan are as follows: Based on the line current-voltage ratio distribution data, according to the contact component state data of the circuit breaker, combining its corresponding current-carrying capacity, contact resistance, and mechanical wear conditions, calculate the power distribution rate of multiple lines, calculate the distribution using the ratio of the line power value to the equipment power limit value, mark the abnormal distribution points, and obtain the preliminary power distribution analysis result; Compare the preliminary power distribution analysis result with the equipment power limit value point by point, mark the power distribution points that exceed the set limit point by point, calculate the total power ratio of the exceeded points, and regenerate the labeled power distribution data after removing the over-limit distribution points; Extract the distribution points after removing the over-limit points from the labeled power distribution data, combine with the equipment thermal power output range to calculate the adjustment factor, and re-optimize the load distribution of each distribution point to generate the optimized load distribution result; Combined with the optimized load distribution result, recalculate the power distribution rate using the formula: Generate a power adjustment distribution plan; Among them, P adj represents the adjusted power distribution scheme, P i represents the power value of the i-th line, P max represents the equipment power limit value, W i represents the weight factor adjusted by the i-th line according to the thermal power data, and n represents the total number of lines; Based on the power adjustment distribution plan, the thermal stability analysis module uses the temperature rise record of the short-circuit detection module to calculate the impact of the load distribution on the temperature rise, compares it with the temperature rise limit of the equipment, removes the configurations that do not meet the thermal stability, recalculates the load distribution, and generates the thermal stable load distribution value; The specific steps for obtaining the thermal stable load distribution value are as follows: Based on the power adjustment distribution plan, use the temperature rise record of the short-circuit detection module to analyze the relationship between its load and temperature rise, calculate the temperature rise value of each load configuration, identify the correlation between the temperature rise change and the load configuration by analyzing the impact of multiple configured load amounts on the temperature rise point by point, extract the temperature rise impact data after correlation analysis, and generate the preliminary temperature rise impact analysis result; Compare the preliminary temperature rise impact analysis result with the temperature rise limit of the equipment point by point. If it is found that the temperature rise of a certain configuration exceeds the limit, immediately remove and adjust it. Calculate the distribution data of the remaining configurations by removing the configuration, and regenerate the load configuration adjustment result to obtain the adjusted load configuration data; Combined with the adjusted load configuration data, calculate the current load distribution, reduce the overall temperature rise, using the formula: Generate the thermal stable load distribution value; Among them, T adj represents the thermally stable load distribution value, Q i represents the load of the i-th configuration, Q max represents the maximum safe load, R i represents the temperature rise coefficient of the i-th configuration, and n represents the total number of configurations; Based on the thermal stability load distribution value, the response adjustment module detects the real-time state of the breaking mechanism, calculates the deviation between the current load and the set value, compares the deviation with the overcurrent limit value, adjusts the load distribution, completes the correction according to the contact separation position, and generates the real-time load response ratio; The specific steps for obtaining the real-time load response ratio are as follows: Call the thermal stability load distribution value, detect the real-time state of the breaking mechanism, calculate the difference from the set load value by extracting the real-time load data, analyze the deviation range between the current load and the set value by using the point-by-point comparison method, screen the points where the deviation exceeds the limit value and record the results, and generate the current load deviation data; Call the current load deviation data, compare it with the overcurrent limit value point by point, mark and eliminate the load points with over-limit deviation, re-organize the remaining load configuration and adjust the distribution ratio, and generate the corrected load distribution data; Combined with the corrected load distribution data and the contact separation position data, analyze the influence of the contact separation position on the load distribution, and correct the response ratio of each load point by using the formula: Calculate and generate the real-time load response ratio; Among them, R real represents the real-time load response ratio, L i represents the current load value of the i-th configuration, L set represents the corresponding set load value, P i represents the correlation coefficient between the load and the contact separation position, C i represents the weight correction factor of the contact state, and n represents the total number of configurations; Based on the real-time load response ratio, the performance verification module monitors the operating state of the breaker action control loop, calculates the power loss and the equipment capacity utilization rate, compares with the set operating efficiency threshold, screens the operating configurations that meet the conditions, and generates the breaker optimized operating efficiency value; The specific steps for obtaining the breaker optimized operating efficiency value are as follows: Based on the real-time load response ratio, monitor the operating state of the breaker action control loop, extract the power loss data by analyzing the real-time load response value and its operating state of each configuration, calculate the power loss ratio of each configuration, and generate the power loss data; Call the power loss data, compare it with the equipment capacity utilization rate point by point, screen the operating configurations that meet the conditions by judging whether the configuration operating efficiency reaches the set threshold, eliminate the configurations that do not meet the conditions and re-organize the distribution, and generate the operating configuration data that meet the conditions; Combined with the operating configuration data that meet the conditions, analyze the power optimization potential of the operating state, re-distribute the load ratio and calculate the comprehensive optimization efficiency, comprehensively evaluate the operating performance based on the equipment capacity and power loss, and use the formula: Calculate the comprehensive optimization efficiency value and generate the breaker optimized operating efficiency value; Among them, E opt represents the comprehensive optimization efficiency value, P used,i represents the power consumption of the i-th configuration, W i represents the capacity weight factor of the i-th configuration, C i represents the power loss coefficient of the i-th configuration, n represents the total number of configurations, U j represents the voltage value of the j-th operating state, U max represents the maximum operating voltage of the system, m represents the total number of operating states.

2. The multifunctional power system protection and control circuit breaker device according to claim 1, characterized in that, The specific steps for obtaining the line current-voltage ratio distribution data are as follows: Call the original current data output by the line current acquisition unit, combine with the rated current value of the overcurrent protection unit, calculate the line current measurement ratio, judge by point-by-point comparison of the difference between the measurement ratio and the rated ratio, mark the sampling points where the deviation range exceeds the set standard, extract the abnormal line current sampling point data, and generate the line current measurement ratio analysis result; Call the original voltage data output by the voltage detection unit, screen the abnormal voltage sampling points by point-by-point comparison with the set threshold, calculate the difference between the abnormal voltage and the rated voltage, count the abnormal voltage fluctuation distribution data, analyze the voltage deviation characteristics according to the distribution data, and generate the abnormal voltage screening result; Combining the analysis result of the line current measurement ratio with the abnormal voltage screening result, calculate the line current-voltage ratio distribution, and generate a result through the weight correction of the ratio distribution, using the formula: Generate the line current-voltage ratio distribution result; Among them, R represents the line current-voltage ratio distribution result, I i represents the line current value at the i-th sampling point, I rated represents the rated current value of the overcurrent protection unit, V i represents the voltage value at the i-th sampling point, V rated represents the rated voltage value, w i represents the weight parameter at the i-th sampling point, which is used to correct the influence of abnormal points on the overall distribution, and n represents the total number of sampling points.

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