Multifunctional power system protection and control circuit breaker device

Abstract

The invention relates to the technical field of protection circuit breakers, in particular to a multifunctional power system protection and control circuit breaker device which comprises a load monitoring module, a load distribution optimization module, a thermal stability analysis module, a response adjustment module and a performance verification module. According to the invention, comprehensive analysis is carried out by combining multiple items of monitoring data, the accuracy of current and voltage abnormity identification is improved, wrong breaking and excessive response are avoided, the system safety is guaranteed, and the utilization rate and energy efficiency of equipment resources are improved based on real-time power distribution and equipment limit during load distribution optimization. According to temperature rise control, load distribution is dynamically adjusted, equipment damage caused by overheating is prevented, operation stability is enhanced, a real-time response adjusting mechanism ensures flexibility and adaptability of power distribution, energy loss in the operation process is reduced, and meanwhile, the overall operation efficiency of a power system is improved 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 field of protective circuit breaker technology includes the design and application of protection and control equipment in power systems. The core content of this field is to quickly isolate the fault point to protect the safe operation of equipment and lines by detecting abnormal or fault conditions in the power system. The overall technical field covers the classification, design, manufacturing of power protection devices and their application in different power scenarios, such as short-circuit protection, overload protection and linkage control with other electrical equipment. These technical fields focus on improving reliability and response speed, and achieve comprehensive protection of the power system by optimizing electrical structure, detection method and response mechanism.

[0003] Among them, the multifunctional power system protection and control circuit breaker device refers to a device that can realize comprehensive protection and control functions in the power system. For abnormal conditions such as short circuit, overload, overcurrent, etc. in the power system, the built-in current detection unit and disconnecting device can realize the rapid disconnection of abnormal current and system protection, and complete real-time status monitoring and fault identification through digital control technology. Specific technical means include the use of high-precision current sensors for real-time data collection, the execution of precise circuit breaking operations through preset response logic, and the combination of fast disconnecting mechanisms to ensure the safety and stability of power equipment and systems.

[0004] The existing technology has insufficient data collection granularity in current and voltage detection, which makes it difficult to accurately respond to subtle changes in abnormalities. The load distribution mechanism fails to fully consider power limits and equipment status, which can easily lead to unbalanced resource allocation or overload problems. The limitations of temperature rise control make it impossible for the system to maintain stability under high load or ambient temperature changes, and there is a risk of equipment damage. The response mechanism does not fully monitor the real-time status, and the adjustment is delayed, which increases the system energy consumption and operation risks, especially in complex power system scenarios. Summary of the invention

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

[0006] In order to achieve the above object, the present invention adopts the following technical solution: A multifunctional power system protection and control circuit breaker device comprises: The load monitoring module collects and integrates the line current based on the current sensor built into the circuit breaker, calculates the line current measurement ratio in combination with the rated current value of the overcurrent protection unit, and calculates the voltage deviation in combination with the output of the voltage detection unit. It screens abnormal voltages according to the set threshold and generates line current-voltage ratio distribution data. The load distribution optimization module calculates the power distribution rate of multiple lines based on the line current-voltage ratio distribution data and the contact assembly status of the circuit breaker, compares it with the equipment power limit, 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; The thermal stability analysis module calculates the influence of load distribution on temperature rise based on the power adjustment distribution scheme and the temperature rise record of the short circuit detection module, compares it with the temperature rise limit of the equipment, removes the configuration that does not meet the thermal stability, recalculates the load distribution, and generates a thermally stable load distribution value; 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; The performance verification module monitors the operating status of the circuit breaker action control loop based on the real-time load response ratio, calculates the power loss and equipment capacity utilization, compares the set operating efficiency threshold, screens the operating configuration that meets the conditions, and generates the circuit breaker optimized operating efficiency value.

[0007] The line current-voltage ratio distribution data includes line current acquisition, overcurrent protection unit, voltage deviation, and abnormal voltage screening; the power adjustment distribution scheme specifically includes multi-line power distribution rate, equipment power limit, and thermal power data; the thermally stable load distribution value specifically refers to 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 circuit breaker optimized operation efficiency value specifically includes power loss, equipment capacity utilization, and operation efficiency threshold.

[0008] As a further solution of the present invention, the step of acquiring the line current-voltage ratio distribution data is specifically as follows: The original current data output by the line current acquisition unit is called, combined with the rated current value of the overcurrent protection unit, to calculate the line current measurement ratio, and the difference between the measured ratio and the rated ratio is compared and judged point by point, and the sampling points whose deviation range exceeds the set standard are marked, and the abnormal line current sampling point data is extracted to generate the line current measurement ratio analysis results; The original voltage data output by the voltage detection unit is called, and the voltage abnormal sampling points are screened by comparing point by point with the set threshold, the difference between the abnormal voltage and the rated voltage is calculated, the abnormal voltage fluctuation distribution data is counted, the voltage deviation characteristics are analyzed according to the distribution data, and the abnormal voltage screening results are generated; Combining the line current measurement ratio analysis result with the abnormal voltage screening result, the line current voltage ratio distribution is calculated, and the result is generated by weight correction of the ratio distribution, using the formula: ; Generate line current-voltage ratio distribution results; R represents the line current-voltage ratio distribution result, represents the line current value at the i-th sampling point, Represents the rated current value of the overcurrent protection unit, represents the voltage value of the i-th sampling point, Represents the rated voltage value, Represents the weight parameter of the i-th sampling point, which is used to correct the impact of outliers on the overall distribution. n represents the total number of sampling points.

[0009] As a further solution of the present invention, the steps of obtaining the power adjustment distribution solution are specifically as follows: Based on the line current-voltage ratio distribution data and in combination with the state of the circuit breaker contact assembly, the power distribution rate of the multiple lines is calculated, the distribution is calculated using the ratio of the line power value to the equipment power limit, abnormal distribution points are marked, and preliminary power distribution analysis results are obtained; Compare the preliminary power distribution analysis results with the power limit of the equipment point by point, mark the power distribution points that exceed the set limit point by point, calculate the total power ratio of the exceeding points, remove the exceeding distribution points and regenerate the marked power distribution data; Extract the distribution points after removing the over-limit points from the marked power distribution data, calculate the adjustment factor in combination with the thermal power output range of the equipment, re-optimize the load distribution of each distribution point, and generate an optimized load distribution result; Combined with the optimized load distribution results, the power distribution rate is recalculated using the formula: ; generating a power adjustment distribution plan; in, represents the adjusted power distribution scheme, represents the power value of the ith line, Represents the device power limit, Represents the weight factor of the ith line adjusted according to the thermal power data, and n represents the total number of lines.

[0010] As a further solution of the present invention, the step of obtaining the thermally stable load distribution value is specifically as follows: Based on the power adjustment distribution scheme, the temperature rise value of each load configuration is calculated by using the temperature rise record of the short circuit detection module, the influence of multiple configured load amounts on the temperature rise is analyzed point by point, the correlation between the temperature rise change and the load configuration is identified, the temperature rise influence data after the correlation analysis is extracted, and a preliminary temperature rise influence analysis result is generated; Compare the preliminary temperature rise impact analysis results with the temperature rise limit of the equipment point by point, identify the load configuration that exceeds the limit, calculate the distribution data of the remaining configurations by eliminating the configurations, regenerate the load configuration adjustment results, and obtain the adjusted load configuration data; Combined with the adjusted load configuration data, calculate the current load distribution and reduce the overall temperature rise using the formula: ; Generate thermally stable load distribution values; in, represents the thermally stable load distribution value, represents the load of the ith configuration, Represents the maximum safe load capacity, represents the temperature rise coefficient of the i-th configuration, and n represents the total number of configurations.

[0011] As a further solution of the present invention, the step of obtaining the real-time load response ratio is specifically as follows: The thermally stable load distribution value is called to detect the real-time state of the breaking mechanism, the difference between the real-time load data and the set load value is calculated by extracting the real-time load data, the deviation range between the current load and the set value is analyzed by point-by-point comparison, the points where the deviation exceeds the limit value are screened and the results are recorded to generate the current load deviation data; The current load deviation data is called, and compared with the overcurrent limit value point by point, and the load points with excessive deviation are marked and eliminated, and the remaining load configuration is reorganized and the distribution ratio is adjusted to generate the corrected load distribution data; Combined with the corrected load distribution data and contact separation position data, the influence of the contact separation position on the load distribution is analyzed, and the response ratio of each load point is corrected, using the formula: ; Calculate and generate real-time load response ratio; in, Represents the real-time load response ratio, represents the current load value of the i-th configuration, Represents the corresponding set load value, Represents the correlation coefficient between load and contact separation position, Represents the weight correction factor of the contact state, and n represents the total number of configurations.

[0012] As a further solution of the present invention, the step of obtaining the optimized operating efficiency value of the circuit breaker is specifically as follows: Based on the real-time load response ratio, the operating state of the circuit breaker action control loop is monitored, and the power loss data is extracted by analyzing the real-time load response value of each configuration and its operating state, and the power loss ratio of each configuration is calculated to generate the power loss data; The power loss data is called and compared with the capacity utilization rate of the equipment point by point. By judging whether the configuration operation efficiency reaches the set threshold, the operation configurations that meet the conditions are screened, the configurations that do not meet the conditions are eliminated and reorganized to generate the operation configuration data that meets the conditions; Combined with the operating configuration data that meets the conditions, the power optimization potential of the operating state is analyzed, and the operating performance is comprehensively evaluated based on the equipment capacity and power loss by redistributing the load ratio and calculating the comprehensive optimization efficiency. The formula is used: ; Calculate the comprehensive optimization efficiency value and generate the circuit breaker optimization operation efficiency value; in, Represents the comprehensive optimization efficiency value, represents the power usage of the ith configuration, represents the capacity weight factor of the ith configuration, represents the power loss coefficient of the i-th configuration, n represents the total number of configurations, represents the voltage value of the jth operating state, represents the maximum operating voltage of the system, and m represents the total number of operating states.

[0013] Compared with the prior art, the advantages and positive effects of the present invention are: In the present invention, by combining multiple monitoring data for comprehensive analysis, the accuracy of current and voltage anomaly identification is improved, erroneous disconnection and over-response are avoided, and system safety is guaranteed. When optimizing load distribution, based on real-time power distribution and equipment limits, equipment resource utilization and energy efficiency are improved. Temperature rise control prevents equipment damage caused by overheating by dynamically adjusting load distribution, thereby enhancing operational stability. The real-time response adjustment mechanism ensures the flexibility and adaptability of power distribution, reduces energy loss during operation, and improves the overall operating efficiency of the power system through efficient monitoring. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a flow chart of the device of the present invention; Figure 2 A flow chart of the steps for obtaining line current-voltage ratio distribution data of the present invention; Figure 3 A flow chart of the steps for obtaining the power adjustment distribution scheme of the present invention; Figure 4 A flow chart of the steps for obtaining the thermally stable load distribution value of the present invention; Figure 5 A flow chart of the steps for obtaining the real-time load response ratio of the present invention; Figure 6 The present invention is a flow chart of the steps for obtaining the optimized operating efficiency value of the circuit breaker. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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 intended to limit the present invention.

[0015] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are 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 cannot be understood as limiting the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0016] Example: See also Figure 1 , a multifunctional power system protection and control circuit breaker device comprises: The load monitoring module collects and integrates the line current based on the current sensor built into the circuit breaker, calculates the line current measurement ratio in combination with the rated current value of the overcurrent protection unit, and calculates the voltage deviation in combination with the output of the voltage detection unit. It screens abnormal voltages according to the set threshold and generates line current-voltage ratio distribution data. The load distribution optimization module calculates the power distribution rate of multiple lines based on the line current-voltage ratio distribution data and the contact assembly status of the circuit breaker, compares it with the equipment power limit, 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; The thermal stability analysis module uses the temperature rise record of the short-circuit detection module based on the power adjustment distribution scheme to calculate the impact of load distribution on temperature rise, compares it with the temperature rise limit of the equipment, removes the configuration that does not meet the thermal stability requirements, recalculates the load distribution, and generates a thermally stable load distribution value; The response adjustment module detects the real-time status 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; The performance verification module monitors the operating status of the circuit breaker action control loop based on the real-time load response ratio, calculates the power loss and equipment capacity utilization, compares the set operating efficiency threshold, screens the operating configuration that meets the conditions, and generates the circuit breaker optimized operating efficiency value.

[0017] The line current-voltage ratio distribution data includes line current acquisition, overcurrent protection unit, voltage deviation, and abnormal voltage screening. The power adjustment distribution plan specifically includes multi-line power distribution rate, equipment power limit, and thermal power data. The thermally stable load distribution value specifically refers to 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 circuit breaker optimization operation efficiency value specifically includes power loss, equipment capacity utilization, and operation efficiency threshold.

[0018] See also Figure 2 , the specific steps for obtaining the line current-voltage ratio distribution data are as follows: The original current data output by the line current acquisition unit is called, combined with the rated current value of the overcurrent protection unit, to calculate the line current measurement ratio, and the difference between the measured ratio and the rated ratio is compared and judged point by point, and the sampling points whose deviation range exceeds the set standard are marked, and the abnormal line current sampling point data is extracted to generate the line current measurement ratio analysis results; The line current data is segmented according to the time series, and the average and standard deviation of the line current values ​​in each segment are counted. Combined with the rated current value of the overcurrent protection unit, the line current measurement ratio is calculated point by point. The distribution characteristics of the high-frequency fluctuation points are analyzed through the time series characteristics of the ratio. The deviation values ​​of the measured ratio of the high-frequency fluctuation points and the rated ratio are compared one by one. The sampling points that exceed the set standard are marked using the range characteristics of the deviation distribution. The marked sampling points are extracted as abnormal line current points to generate the line current measurement ratio analysis results.

[0019] The original voltage data output by the voltage detection unit is called, and the voltage abnormal sampling points are screened by comparing point by point with the set threshold, the difference between the abnormal voltage and the rated voltage is calculated, the abnormal voltage fluctuation distribution data is counted, the voltage deviation characteristics are analyzed according to the distribution data, and the abnormal voltage screening results are generated; Multi-stage processing is performed according to the voltage deviation characteristics. The voltage data is divided into several segments according to the measurement time. The statistical characteristics of the voltage value in each segment are calculated, the average deviation and standard deviation of the voltage value are calculated, and the abnormal segments are marked according to the deviation characteristics of each segment. The marked abnormal segments are screened by setting a threshold, and the difference between the abnormal voltage value and the rated voltage value in each segment is calculated. The fluctuation distribution statistical data of the abnormal voltage and the rated voltage is generated. The fluctuation characteristics are analyzed according to the statistical results, and the segments with significantly abnormal distribution are extracted to generate abnormal voltage screening results.

[0020] Combine the line current measurement ratio analysis results with the abnormal voltage screening results to calculate the line current voltage ratio distribution, and generate the result through the weight correction of the ratio distribution, using the formula: ; Generate line current-voltage ratio distribution results; R represents the line current-voltage ratio distribution result, represents the line current value at the i-th sampling point, Represents the rated current value of the overcurrent protection unit, represents the voltage value of the i-th sampling point, Represents the rated voltage value, Represents the weight parameter of the i-th sampling point, which is used to correct the impact of outliers on the overall distribution. n represents the total number of sampling points.

[0021] formula: ; The benefit of the formula is that it introduces a weight parameter in combination with the ratio relationship between line current and voltage to correct the influence of abnormal points on the overall distribution, thereby more accurately reflecting the line current-voltage ratio distribution characteristics.

[0022] Detailed explanation of the formula and the process of formula calculation and derivation: In the formula, R represents the line current-voltage ratio distribution result, represents the line current value of the i-th sampling point, obtained through the line current acquisition unit, Represents the rated current value of the overcurrent protection unit, which is provided by the device parameter setting. Represents the voltage value of the i-th sampling point, obtained through the voltage detection unit, Represents the rated voltage value, provided by the equipment calibration parameters. represents the weight parameter of the i-th sampling point, which is calculated by the deviation degree of the outlier point. n represents the total number of sampling points, which is calculated by the sampling frequency and time period.

[0023] In parameter assignment, assume (Unit: A), (Unit: A), (Unit: V), (Unit: V), .

[0024] The specific calculation process is:

[0025] Calculate the numerator term by term:

[0026] Denominator calculation:

[0027] The final result is calculated:

[0028] The result shows that the line current-voltage ratio distribution value is 0.141. This result is used to determine whether the line current and voltage fluctuations are within the normal range. Combined with the fluctuation range analysis, the electrical characteristics distribution of the line is obtained.

[0029] See also Figure 3 , the specific steps for obtaining the power adjustment distribution plan are: Based on the line current-voltage ratio distribution data and combined with the circuit breaker contact assembly status, the power distribution rate of multiple lines is calculated, the distribution is calculated using the ratio of the line power value to the equipment power limit, abnormal distribution points are marked, and preliminary power distribution analysis results are obtained; First, the current data of each line is obtained from the line current acquisition unit, and the line current-voltage ratio distribution is calculated by the ratio of current to voltage. Then, the power distribution rate of each line is calculated according to the contact assembly status data of the circuit breaker, combined with its corresponding current carrying capacity, contact resistance and mechanical wear. The calculation formula of the power distribution rate is: ,in, is the power distribution value of the ith line, is the current value of the i-th circuit, is the voltage value of the ith circuit, It is the line power factor, which indicates the power loss ratio of the line. It is obtained based on the load and efficiency parameters of the equipment. It can be dynamically adjusted through the equipment historical data and real-time monitoring results to obtain the basic data of power distribution. In this process, current and voltage data are collected in real time through sensors, while the power factor is evaluated based on the equipment age, maintenance status and changes in the working environment. According to the calculated power distribution rate, it can be further compared with the equipment power limit, marking the line points that exceed the set threshold, and obtaining preliminary power distribution analysis results.

[0030] 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 exceeding points, remove the exceeding distribution points and regenerate the marked power distribution data; By calculating the power ratio of each line to the rated power of the equipment, use the formula: ,in, is the power ratio of the ith line, is the power value of the ith line, The rated power value of the equipment is set according to the equipment type and the manufacturer's technical specifications. The calculated ratio can be used to further determine whether the power of each line exceeds the safe operating range of the equipment. If it exceeds the set power limit, it will be recorded and marked, and the lines exceeding the limit will be excluded. The line data that meets the specifications will be retained to generate power distribution data. The analysis results will be used for the subsequent optimization of load distribution and the establishment of power adjustment plans.

[0031] Extract the distribution points after removing the over-limit points from the marked power distribution data, calculate the adjustment factor based on the equipment thermal power output range, re-optimize the load distribution of each distribution point, and generate the optimized load distribution result; It is determined by the difference between the actual operating temperature of the equipment and the rated operating temperature. When calculating, the following formula can be applied: ,in, represents the adjustment factor of the ith line, is the actual operating temperature of the device, is the rated operating temperature of the device. According to the heat dissipation capacity and load condition of the device, the thermal power adjustment factor of each line is obtained, and then the load distribution is re-optimized, and the adjusted power is distributed to each line to generate the optimized load distribution result. This result ensures that under the thermal power condition, the power distribution of each line meets the maximum load capacity and heat dissipation requirements of the device.

[0032] Combined with the optimized load distribution results, recalculate the power distribution rate using the formula:

[0033] generating a power adjustment distribution plan; in, represents the adjusted power distribution scheme, represents the power value of the ith line, Represents the device power limit, Represents the weight factor of the ith line adjusted according to the thermal power data, and n represents the total number of lines.

[0034] formula

[0035] The usefulness of the formula is that by adding the adjustment factor , it is possible to accurately adjust the load distribution of each line, ensure that the power distribution of each line does not exceed the maximum carrying capacity of the equipment power, and further optimize the load distribution between the lines based on the thermal power output.

[0036] Detailed explanation of the formula and the process of formula calculation and derivation: In this formula, is the adjusted power distribution scheme, is the power value of the ith line, is the device power limit, is the weight factor of the ith line, which is used to adjust the power share of each line. The weight factor is dynamically calculated according to the changes in the operating temperature, load and power factor of each line. For example, assuming And according to the current thermal power of the equipment, Then, by substituting the formula, the adjusted power distribution value is:

[0037] The result shows that the adjusted power distribution value is 1.24, which means that under the maximum power limit of the equipment, the power distribution scheme after load optimization has met the requirements.

[0038] See also Figure 4 , the specific steps for obtaining the thermally stable load distribution value are: Based on the power adjustment distribution scheme, the temperature rise value of each load configuration is calculated using the temperature rise record of the short-circuit detection module. The impact of multiple configured loads on the temperature rise is analyzed point by point, the correlation between the temperature rise change and the load configuration is identified, and the temperature rise impact data after the correlation analysis is extracted to generate preliminary temperature rise impact analysis results. First, the temperature rise value of each load configuration is obtained. By collecting its temperature rise data under different load configurations, each configuration is compared to analyze the relationship between its load and temperature rise. For example, assuming that the temperature rise under a load configuration A is 45°C, and the temperature rise under configuration B is 55°C, these data will be evaluated by comparison. Next, the temperature rise value of each configuration is compared with the standard temperature rise limit of the equipment. For example, if the temperature rise limit is set to 50°C, it is found that the temperature rise of configuration A is lower than the limit, while configuration B exceeds the limit. After that, according to the temperature rise limit of the equipment, the load configuration that exceeds the temperature rise limit is removed. For example, if the temperature rise of configuration B exceeds the limit of 50°C, the configuration will be eliminated, and configuration A meets the thermal stability requirements. In this way, the configuration data that meets the standard is screened out, and its load distribution is further optimized to generate the screened adjustment data to ensure that the load configuration meets the thermal stability requirements and obtain a suitable load distribution result.

[0039] Compare the preliminary temperature rise impact analysis results with the temperature rise limit of the equipment point by point, identify the load configuration that exceeds the limit, calculate the distribution data of the remaining configurations by eliminating the configurations, regenerate the load configuration adjustment results, and obtain the adjusted load configuration data; By combining the results of the temperature rise impact analysis with the temperature rise limit of the equipment, the temperature rise values ​​of the load configurations are compared with the maximum temperature rise limit of the equipment one by one. If the temperature rise of a certain configuration exceeds the limit, it will be immediately removed and adjusted to ensure that all remaining configurations are within the safe temperature rise range. Assuming that for a certain load configuration C, the temperature rise is 60°C, which exceeds the temperature rise limit of the equipment by 50°C, configuration C will be removed. At this time, by adjusting and optimizing the temperature rise of each remaining configuration, the configuration that does not meet the thermal stability continues to exist, thereby ensuring that the temperature rise of the entire system remains within the allowable range of the equipment. Next, we will further analyze the remaining load configurations and optimize them by adjusting the weight factor of the load distribution to ensure that each configuration operates within the optimal temperature rise range. Obtain a load configuration data set that meets the requirements adjusted based on the optimized data.

[0040] Combined with the adjusted load configuration data, calculate the current load distribution and reduce the overall temperature rise using the formula: ; Generate thermally stable load distribution values; Among them, among them, represents the thermally stable load distribution value, represents the load of the ith configuration, Represents the maximum safe load capacity, represents the temperature rise coefficient of the i-th configuration, and n represents the total number of configurations.

[0041] formula: ; Detailed explanation of the formula and the process of formula calculation and derivation: In this formula, represents the thermally stable load distribution value, represents the load of the ith configuration, Represents the maximum safe load capacity, represents the temperature rise coefficient of the i-th configuration, and n represents the total number of configurations. When calculating, first compare the load of each load configuration with the maximum load of the device. Assuming that the load configuration 1 Unit, maximum load of equipment Unit, the load ratio is , then calculate the temperature rise coefficient for this configuration , assuming the temperature rise coefficient is 1.2, the contribution of this term is:

[0042] Similarly, the calculation process for other configurations will be carried out in the same way. By summing the results of all configurations, the total temperature rise impact value is obtained. The minimum temperature rise value is selected to ensure that the system achieves thermally stable load distribution.

[0043] The results show that through the reasonable weighting of load configuration and temperature rise coefficient, the optimized load distribution will achieve the optimization of the thermal stability of the equipment, effectively reduce the load in the high temperature area of ​​the system, ensure the safe operation of the equipment, and reduce the risks caused by excessive temperature rise.

[0044] See also Figure 5 ,The specific steps for obtaining the real-time load response ratio are: Call the thermally stable load distribution value, detect the real-time status of the breaking mechanism, calculate the difference between the real-time load data and the set load value, analyze the deviation range between the current load and the set value by point-by-point comparison, select the points where the deviation exceeds the limit value and record the results, and generate the current load deviation data; Extract the real-time status data of the disconnecting mechanism, calculate the current load deviation by monitoring the difference between the real-time load data and the set load value, and first call the real-time monitoring module to obtain the real-time load value ,Will With the preset setting load value Perform point-by-point comparison and calculate the difference according to the formula Calculate the load deviation, then compare the difference data with the deviation range allowed by the equipment, mark the out-of-limit deviation points by setting the threshold interval, calculate the deviation ratio at the points beyond the set range and eliminate these points, and verify the rationality of the load value again through the eliminated data to ensure that the remaining load configuration is within an acceptable range and generate the current load deviation data.

[0045] Call the current load deviation data, compare it point by point with the overcurrent limit value, mark the load points with excessive deviation and remove them, reorganize the remaining load configuration and adjust the distribution ratio to generate the corrected load distribution data; The deviation result is compared point by point with the overcurrent limit value of the device. The load points with excessive deviation are eliminated through point-by-point judgment and the load distribution ratio is reconfigured. First, the relative proportion of each load point is calculated based on the deviation data. The deviation degree of each point is quantified in the form of Compare point by point to determine whether the relative proportion exceeds the limit, mark the load point that exceeds the limit and call the remaining load point data for redistribution, and calculate the distribution proportion formula of the remaining load Adjust the load distribution ratio and generate corrected load distribution data.

[0046] Combined with the corrected load distribution data and contact separation position data, the influence of contact separation position on load distribution is analyzed. By correcting the response ratio of each load point, the formula is used: ; Calculate and generate real-time load response ratio; in, Represents the real-time load response ratio, represents the current load value of the i-th configuration, Represents the corresponding set load value, Represents the correlation coefficient between load and contact separation position, Represents the weight correction factor of the contact state, and n represents the total number of configurations.

[0047] formula: ; The benefit 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 disconnecting mechanism.

[0048] Detailed explanation of the formula and the process of formula calculation and derivation: (obtain the current load value through real-time monitoring equipment), (obtained through preset data), (Correlation coefficient calculated by mechanical testing of contact separation position), (weight correction factor generated by contact state analysis), n=10 (obtained through statistics of the total load quantity of system configuration), substitute into the formula and calculate step by step:

[0049] The first step is to calculate the numerator:

[0050] The numerator after summation:

[0051] Calculate the denominator:

[0052] Calculate the ratio:

[0053] The result shows 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. This ratio can be used to further correct the load distribution scheme to ensure stable operation of the disconnecting mechanism.

[0054] See also Figure 6 , the specific steps for obtaining the optimized operation efficiency value of the circuit breaker are: Based on the real-time load response ratio, monitor the operating status of the circuit breaker action control loop, extract power loss data by analyzing the real-time load response value of each configuration and its operating status, calculate the power loss ratio of each configuration, and generate power loss data; Analyze the load data of each operating state in the circuit breaker action control loop, extract the real-time change trend of power loss one by one, obtain the real-time power data of each configuration by comparing the real-time record of the load response ratio with the operating state, and calculate its power loss ratio. For the extraction of power data, it is necessary to obtain the total power consumption of the circuit breaker in each operating state and the power distribution of each configuration from the real-time monitoring module, and calculate the formula ,in, Indicates the current total power consumption of the circuit breaker, It represents the load response ratio of the i-th configuration, ensuring that the actual load of each configuration is optimized in the power distribution. The data validity is verified by comparing with the operation record, and finally the power loss data is generated.

[0055] Call the power loss data and compare it with the capacity utilization of the equipment point by point. By judging whether the configuration operation efficiency reaches the set threshold, screen the operation configurations that meet the conditions, remove the configurations that do not meet the conditions and reorganize the distribution to generate the operation configuration data that meets the conditions; By analyzing and evaluating the equipment capacity utilization, the operating efficiency of each configuration is calculated one by one, and the ratio of power loss to equipment capacity is compared as the key indicator. The specific calculation of operating efficiency is based on the formula ,in is the total capacity of the device, The power usage of the i-th configuration is obtained by screening configurations that meet the set efficiency threshold, marking and removing configurations that do not meet the conditions, recombining the distribution of the remaining configurations, recording the screening process in the device log, and verifying the rationality of the final configuration through item-by-item evaluation to generate running configuration data that meets the conditions.

[0056] Combined with the operating configuration data that meets the conditions, analyze the power optimization potential of the operating state, redistribute the load ratio and calculate the comprehensive optimization efficiency, and comprehensively evaluate the operating performance based on the equipment capacity and power loss. The formula is: ; Calculate the comprehensive optimization efficiency value and generate the circuit breaker optimization operation efficiency value; in, Represents the comprehensive optimization efficiency value, represents the power usage of the ith configuration, represents the capacity weight factor of the ith configuration, represents the power loss coefficient of the i-th configuration, n represents the total number of configurations, represents the voltage value of the jth operating state, represents the maximum operating voltage of the system, and m represents the total number of operating states.

[0057] formula: ; The benefit of the formula is that it comprehensively optimizes the circuit breaker operating status by combining power usage, capacity weight and voltage stability to comprehensively evaluate the operating efficiency.

[0058] Detailed explanation of the formula and the process of formula calculation and derivation: 1. Get : Extracted from the power data recorded in the operating status monitoring, assuming

[0059] 2. Get :According to the configured capacity weight, assuming

[0060] 3. Get : Extracted from the equipment power loss data, assuming

[0061] 4. Get and : Extracted from voltage monitoring records, assuming

[0062] Derivation process:

[0063] The result shows that the comprehensive optimization efficiency value of the circuit breaker is 0.79, indicating that the current operating configuration has achieved 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.

[0064] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in other forms. Any technician familiar with the profession may use the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still falls 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 comprises: The load monitoring module collects and integrates the line current based on the current sensor built into the circuit breaker, calculates the line current measurement ratio in combination with the rated current value of the overcurrent protection unit, and calculates the voltage deviation in combination with the output of the voltage detection unit. It screens abnormal voltages according to the set threshold and generates line current-voltage ratio distribution data. The load distribution optimization module calculates the power distribution rate of multiple lines based on the line current-voltage ratio distribution data and the contact assembly status of the circuit breaker, compares it with the equipment power limit, 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; The thermal stability analysis module calculates the influence of load distribution on temperature rise based on the power adjustment distribution scheme and the temperature rise record of the short circuit detection module, compares it with the temperature rise limit of the equipment, removes the configuration that does not meet the thermal stability, recalculates the load distribution, and generates a thermally stable load distribution value; 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; The performance verification module monitors the operating status of the circuit breaker action control loop based on the real-time load response ratio, calculates the power loss and equipment capacity utilization, compares the set operating efficiency threshold, screens the operating configuration that meets the conditions, and generates the circuit breaker optimized operating efficiency value.

2. The multifunctional power system protection and control circuit breaker device according to claim 1, characterized in that: The line current-voltage ratio distribution data includes line current acquisition, overcurrent protection unit, voltage deviation, and abnormal voltage screening; the power adjustment distribution scheme specifically includes multi-line power distribution rate, equipment power limit, and thermal power data; the thermally stable load distribution value specifically refers to 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 circuit breaker optimized operation efficiency value specifically includes power loss, equipment capacity utilization, and operation efficiency threshold.

3. The multifunctional power system protection and control circuit breaker device according to claim 2, characterized in that: The steps for obtaining the line current-voltage ratio distribution data are specifically as follows: The original current data output by the line current acquisition unit is called, combined with the rated current value of the overcurrent protection unit, to calculate the line current measurement ratio, and the difference between the measured ratio and the rated ratio is compared and judged point by point, and the sampling points whose deviation range exceeds the set standard are marked, and the abnormal line current sampling point data is extracted to generate the line current measurement ratio analysis results; The original voltage data output by the voltage detection unit is called, and the voltage abnormal sampling points are screened by comparing point by point with the set threshold, the difference between the abnormal voltage and the rated voltage is calculated, the abnormal voltage fluctuation distribution data is counted, the voltage deviation characteristics are analyzed according to the distribution data, and the abnormal voltage screening results are generated; Combining the line current measurement ratio analysis result with the abnormal voltage screening result, the line current voltage ratio distribution is calculated, and the result is generated by weight correction of the ratio distribution, using the formula: ； Generate line current-voltage ratio distribution results; R represents the line current-voltage ratio distribution result, represents the line current value at the i-th sampling point, Represents the rated current value of the overcurrent protection unit, represents the voltage value of the i-th sampling point, Represents the rated voltage value, Represents the weight parameter of the i-th sampling point, which is used to correct the impact of outliers on the overall distribution. n represents the total number of sampling points.

4. The multifunctional power system protection and control circuit breaker device according to claim 3, characterized in that: The steps for obtaining the power adjustment distribution scheme are specifically as follows: Based on the line current-voltage ratio distribution data and in combination with the state of the circuit breaker contact assembly, the power distribution rate of the multiple lines is calculated, the distribution is calculated using the ratio of the line power value to the equipment power limit, abnormal distribution points are marked, and preliminary power distribution analysis results are obtained; Compare the preliminary power distribution analysis results with the power limit of the equipment point by point, mark the power distribution points that exceed the set limit point by point, calculate the total power ratio of the exceeding points, remove the exceeding distribution points and regenerate the marked power distribution data; Extract the distribution points after removing the over-limit points from the marked power distribution data, calculate the adjustment factor in combination with the thermal power output range of the equipment, re-optimize the load distribution of each distribution point, and generate an optimized load distribution result; Combined with the optimized load distribution results, the power distribution rate is recalculated using the formula: ； generating a power adjustment distribution plan; in, represents the adjusted power distribution scheme, represents the power value of the ith line, Represents the device power limit, Represents the weight factor of the ith line adjusted according to the thermal power data, and n represents the total number of lines.

5. The multifunctional power system protection and control circuit breaker device according to claim 4, characterized in that: The steps for obtaining the thermally stable load distribution value are specifically as follows: Based on the power adjustment distribution scheme, the temperature rise value of each load configuration is calculated by using the temperature rise record of the short circuit detection module, the influence of multiple configured load amounts on the temperature rise is analyzed point by point, the correlation between the temperature rise change and the load configuration is identified, the temperature rise influence data after the correlation analysis is extracted, and a preliminary temperature rise influence analysis result is generated; Compare the preliminary temperature rise impact analysis results with the temperature rise limit of the equipment point by point, identify the load configuration that exceeds the limit, calculate the distribution data of the remaining configurations by eliminating the configurations, regenerate the load configuration adjustment results, and obtain the adjusted load configuration data; Combined with the adjusted load configuration data, calculate the current load distribution and reduce the overall temperature rise using the formula: ； Generate thermally stable load distribution values; in, represents the thermally stable load distribution value, represents the load of the ith configuration, Represents the maximum safe load capacity, represents the temperature rise coefficient of the i-th configuration, and n represents the total number of configurations.

6. The multifunctional power system protection and control circuit breaker device according to claim 5, characterized in that: The step of obtaining the real-time load response ratio is specifically as follows: The thermally stable load distribution value is called to detect the real-time state of the breaking mechanism, the difference between the real-time load data and the set load value is calculated by extracting the real-time load data, the deviation range between the current load and the set value is analyzed by point-by-point comparison, the points where the deviation exceeds the limit value are screened and the results are recorded to generate the current load deviation data; The current load deviation data is called, and compared with the overcurrent limit value point by point, and the load points with excessive deviation are marked and eliminated, and the remaining load configuration is reorganized and the distribution ratio is adjusted to generate the corrected load distribution data; Combined with the corrected load distribution data and contact separation position data, the influence of the contact separation position on the load distribution is analyzed, and the response ratio of each load point is corrected, using the formula: ； Calculate and generate real-time load response ratio; in, Represents the real-time load response ratio, represents the current load value of the i-th configuration, Represents the corresponding set load value, Represents the correlation coefficient between load and contact separation position, Represents the weight correction factor of the contact state, and n represents the total number of configurations.

7. The multifunctional power system protection and control circuit breaker device according to claim 6, characterized in that: The steps for obtaining the optimized operation efficiency value of the circuit breaker are specifically as follows: Based on the real-time load response ratio, the operating state of the circuit breaker action control loop is monitored, and the power loss data is extracted by analyzing the real-time load response value of each configuration and its operating state, and the power loss ratio of each configuration is calculated to generate the power loss data; The power loss data is called and compared with the capacity utilization rate of the equipment point by point. By judging whether the configuration operation efficiency reaches the set threshold, the operation configurations that meet the conditions are screened, the configurations that do not meet the conditions are eliminated and reorganized to generate the operation configuration data that meets the conditions; Combined with the operating configuration data that meets the conditions, the power optimization potential of the operating state is analyzed, and the operating performance is comprehensively evaluated based on the equipment capacity and power loss by redistributing the load ratio and calculating the comprehensive optimization efficiency. The formula is used: ； Calculate the comprehensive optimization efficiency value and generate the circuit breaker optimization operation efficiency value; in, Represents the comprehensive optimization efficiency value, represents the power usage of the ith configuration, represents the capacity weight factor of the ith configuration, represents the power loss coefficient of the i-th configuration, n represents the total number of configurations, represents the voltage value of the jth operating state, represents the maximum operating voltage of the system, and m represents the total number of operating states.

Images