A modular vacuum circuit breaker and its intelligent control system

Abstract

This invention belongs to the field of vacuum circuit breaker control technology, specifically a modular vacuum circuit breaker and its intelligent control system. The intelligent control system includes a power grid intelligent monitoring and transmission module, a circuit breaker intelligent control module, an action execution monitoring module, a closing status monitoring module, an opening status monitoring module, and a remote monitoring terminal. This invention enables the modular vacuum circuit breaker to switch between closing and opening states through the circuit breaker intelligent control module. The action execution monitoring module monitors the opening and closing actions of the modular vacuum circuit breaker to determine whether the corresponding actions meet the requirements. The closing status monitoring module and the opening status monitoring module perform anomaly analysis on the closing and opening states of the modular vacuum circuit breaker, respectively, achieving effective monitoring and control of the modular vacuum circuit breaker, significantly improving the safety of its use and reducing the monitoring difficulty for remote supervisors.

Description

Technical Field

[0001] This invention relates to the field of vacuum circuit breaker control technology, specifically a modular vacuum circuit breaker and its intelligent control system. Background Technology

[0002] A modular vacuum circuit breaker is a high-voltage switchgear that uses vacuum as an insulation and arc-extinguishing medium. Its structure is divided into multiple independent modules, each of which performs a different function. These modules can be interconnected and work together to realize the overall function of the circuit breaker. As an important component of the power system, the performance of the modular vacuum circuit breaker directly affects the stable operation of the power system.

[0003] A control device for an outdoor high-voltage AC vacuum circuit breaker is disclosed in Chinese invention patent with publication number CN102412547A. It determines whether a three-phase unbalanced fault has occurred in the line by detecting the current vector value of the three-phase line and comparing it with the protection value, thereby realizing zero-sequence protection.

[0004] However, in actual use, it is impossible to effectively monitor and reasonably evaluate the performance of each action of the circuit breaker, and it is impossible to make abnormal judgments on the closing and opening states of the circuit breaker and comprehensively analyze the performance status of the circuit breaker. This increases the difficulty of monitoring and controlling the operation of the circuit breaker and makes it difficult for managers to make reasonable improvement measures for the circuit breaker in a timely manner.

[0005] To address the aforementioned technical shortcomings, a solution is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a modular vacuum circuit breaker and its intelligent control system, which solves the problems of existing technologies being unable to effectively monitor and reasonably evaluate the performance of each action of the modular vacuum circuit breaker, and being unable to make abnormal judgments on the closing and opening states of the circuit breaker and comprehensively analyze the performance status of the circuit breaker, resulting in great difficulty in monitoring and controlling the operation of the circuit breaker.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A modular vacuum circuit breaker intelligent control system includes a power grid intelligent monitoring and transmission module, a circuit breaker intelligent control module, an action execution monitoring module, a closing status monitoring module, an opening status monitoring module, and a remote monitoring terminal;

[0009] The power grid intelligent monitoring and transmission module monitors the power grid lines corresponding to the modular vacuum circuit breaker, identifies overload or short-circuit faults in the corresponding power grid lines, generates a trip signal when an overload or short-circuit fault is detected, and sends the trip signal to the circuit breaker intelligent control module.

[0010] Supervisory personnel send opening or closing signals through a remote monitoring terminal. When the circuit breaker intelligent control module receives the opening signal, it switches the modular vacuum circuit breaker from the closing state to the opening state. When it receives the closing signal, it switches the modular vacuum circuit breaker from the opening state to the closing state.

[0011] The action execution monitoring module monitors the opening and closing actions of the modular vacuum circuit breaker, analyzes the data to determine whether the execution of the corresponding actions meets the requirements, and sends the judgment information of the corresponding actions to the remote monitoring terminal.

[0012] The closing status monitoring module is used to perform closing anomaly analysis on the modular vacuum circuit breaker when it is in the closing state. Through analysis, it generates a closing status warning signal or a closing status no-anomaly signal and sends the closing status warning signal or closing status no-anomaly signal to the remote monitoring terminal.

[0013] The tripping status monitoring module is used to analyze tripping anomalies when the modular vacuum circuit breaker is in the tripping state. Through analysis, it generates a tripping status warning signal or a tripping status normal signal and sends the tripping status warning signal or tripping status normal signal to the remote monitoring terminal.

[0014] Furthermore, the specific analysis process of the action execution monitoring module includes:

[0015] The time taken for the modular vacuum circuit breaker to complete the corresponding action is obtained and marked as the action time measurement value. The average speed at which the modular vacuum circuit breaker performs the corresponding action is also marked as the action speed measurement value. The difference between the action speed measurement value and the median of the preset standard action speed measurement value range is calculated and the absolute value is taken to obtain the action speed analysis value.

[0016] The system analyzes the motion trajectory of the moving contact to obtain the motion trajectory output value. It then calculates the motion execution monitoring value by combining the motion time measurement value, motion speed analysis value, and motion trajectory output value. Finally, it compares the motion execution monitoring value with the corresponding preset motion execution monitoring threshold. If the motion execution monitoring value exceeds the preset threshold, the system determines that the execution of the corresponding motion does not meet the requirements and marks the corresponding motion execution operation as a non-optimal operation. If the motion execution monitoring value does not exceed the preset threshold, the system determines that the execution of the corresponding motion meets the requirements and marks the corresponding motion execution operation as a qualified operation.

[0017] Furthermore, the specific analysis process for verifying and analyzing the motion trajectory of the moving contact is as follows:

[0018] When the modular vacuum circuit breaker performs the corresponding action, the actual movement trajectory of the moving contact is obtained, the actual movement trajectory is overlapped with the corresponding standard movement trajectory, and the percentage of overlap between the actual movement trajectory and the corresponding standard movement trajectory is marked as the action movement trajectory overlap detection value.

[0019] Furthermore, based on the actual motion trajectory and the corresponding standard motion trajectory, the position where trajectory deviance begins is identified and marked as the trajectory deviance point. The number of trajectory deviance points during the corresponding action is obtained and marked as the motion trajectory deviance detection value. The motion trajectory output value is obtained by numerically calculating the motion trajectory overlap detection value and the motion trajectory deviance detection value.

[0020] Furthermore, the specific analysis process of the closing status monitoring module includes:

[0021] The closing force curve of the modular vacuum circuit breaker was collected per unit time. A rectangular coordinate system located in the first quadrant was established with time as the X-axis and closing force as the Y-axis. The closing force curve was placed in the rectangular coordinate system, and the starting point of the closing force curve was located on the Y-axis.

[0022] In a rectangular coordinate system, draw a closed calibration ray parallel to the X-axis with its endpoint on the Y-axis. Mark the closed region enclosed by the portion of the closing force curve below the closed calibration ray and the closed calibration ray as a non-tight region.

[0023] All non-tight regions are obtained, and the area of ​​the corresponding non-tight region is marked as the non-tight analysis value. The non-tight analysis values ​​of all non-tight regions are summed to obtain the non-tight coefficient. The non-tight coefficient is compared with the preset non-tight coefficient threshold. If the non-tight coefficient exceeds the preset non-tight coefficient threshold, a closing status warning signal is generated.

[0024] Furthermore, if the non-tight coefficient does not exceed the preset non-tight coefficient threshold, the non-tight analysis value is compared with the preset non-tight analysis threshold. If the non-tight analysis value exceeds the preset non-tight analysis threshold, the corresponding non-tight area is marked as an emergency area; the number of emergency areas is marked as the non-tight risk value; and the non-tight analysis value with the largest value is marked as the non-tight amplitude value.

[0025] The closing status monitoring value is obtained by numerically calculating the non-tight coefficient, non-tight risk value, and non-tight amplitude value. The closing status monitoring value is then compared with the preset closing status monitoring threshold. If the closing status monitoring value exceeds the preset closing status monitoring threshold, a closing status early warning signal is generated; if the closing status monitoring value does not exceed the preset closing status monitoring threshold, a closing status normal signal is generated.

[0026] Furthermore, the specific analysis process of the tripping status monitoring module is as follows:

[0027] The distance between the moving contact and the stationary contact in the modular vacuum circuit breaker is collected in real time and marked as the moving-stationary distance detection value. All moving-stationary distance detection values ​​are obtained within a unit time, and the moving-stationary distance detection value with the smallest value is marked as the moving-stationary opening distance value. The variance of all moving-stationary distance detection values ​​within a unit time is calculated to obtain the moving-stationary distance wave value.

[0028] The dynamic and static opening distance values ​​and dynamic and static distance wave values ​​are compared with the preset dynamic and static opening distance thresholds and preset dynamic and static distance wave thresholds respectively. If the dynamic and static opening distance value does not exceed the preset dynamic and static opening distance threshold or the dynamic and static distance wave value exceeds the preset dynamic and static distance wave threshold, a tripping status warning signal is generated. If the dynamic and static opening distance value exceeds the preset dynamic and static opening distance threshold and the dynamic and static distance wave value does not exceed the preset dynamic and static distance wave threshold, a tripping status no-anomaly signal is generated.

[0029] Furthermore, the remote monitoring terminal is connected to the circuit breaker analysis and reminder module. The circuit breaker analysis and reminder module is used to set the detection period and analyze the operating performance of the modular vacuum circuit breaker during the detection period. The analysis is used to determine whether to generate a circuit breaker quality warning signal. When a circuit breaker quality warning signal is generated, it is sent to the remote monitoring terminal. When the remote monitoring terminal receives the circuit breaker quality warning signal, it issues a corresponding warning.

[0030] Furthermore, the specific analysis process of the circuit breaker analysis and alert module is as follows:

[0031] The number of non-optimal operations performed during the detection period was collected and compared with the total number of opening and closing operations of the modular vacuum circuit breaker during the detection period to obtain the circuit breaker execution abnormality value. The number of closing status warning signals and the number of opening status warning signals generated by the modular vacuum circuit breaker during the detection period were marked as closing warning detection value and opening warning detection value, respectively.

[0032] The circuit breaker warning coefficient is obtained by numerically calculating the circuit breaker execution abnormal value, closing warning detection value and opening warning detection value. The circuit breaker warning coefficient is then compared with the preset circuit breaker warning coefficient threshold. If the circuit breaker warning coefficient exceeds the preset circuit breaker warning coefficient threshold, a circuit breaker quality warning signal is generated.

[0033] Furthermore, the present invention also proposes a modular vacuum circuit breaker, which adopts the intelligent control system of the aforementioned modular vacuum circuit breaker.

[0034] Compared with the prior art, the beneficial effects of the present invention are:

[0035] 1. In this invention, the modular vacuum circuit breaker is switched between closed and open states by the intelligent control module of the circuit breaker. The action execution monitoring module monitors the opening and closing actions of the modular vacuum circuit breaker to determine whether the execution of the corresponding actions meets the requirements. The closing state monitoring module and the opening state monitoring module perform anomaly analysis on the closing and opening states of the modular vacuum circuit breaker respectively, so as to realize effective monitoring and control of the modular vacuum circuit breaker, significantly improve the safety of the modular vacuum circuit breaker and reduce the supervision difficulty for remote supervisors.

[0036] 2. In this invention, the operation performance of the modular vacuum circuit breaker during the detection period is analyzed by the circuit breaker analysis and reminder module. The analysis determines whether a circuit breaker quality warning signal should be generated. When a circuit breaker quality warning signal is generated, the remote monitoring personnel are reminded to strengthen the operation monitoring of the modular vacuum circuit breaker or replace the circuit breaker in a timely manner to ensure the subsequent use effect and safety. This further reduces the difficulty of monitoring the modular vacuum circuit breaker and has a high degree of intelligence. Attached Figure Description

[0037] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings;

[0038] Figure 1 This is a system block diagram of Embodiment 1 of the present invention;

[0039] Figure 2 This is a system block diagram of Embodiment 2 of the present invention. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Example 1: As Figure 1 As shown, the present invention proposes a modular vacuum circuit breaker. The intelligent control system adopted by the modular vacuum circuit breaker includes a power grid intelligent monitoring and transmission module, a circuit breaker intelligent control module, an action execution monitoring module, a closing status monitoring module, an opening status monitoring module, and a remote monitoring terminal.

[0042] The power grid intelligent monitoring and transmission module monitors the power grid lines corresponding to the modular vacuum circuit breaker, identifies overload or short-circuit faults in the corresponding power grid lines, generates a trip signal when an overload or short-circuit fault is detected, and sends the trip signal to the circuit breaker intelligent control module to control the modular vacuum circuit breaker to disconnect the corresponding power grid circuit, prevent the fault from escalating, and protect the safety of power equipment and the power system.

[0043] Furthermore, supervisors can send opening or closing signals via remote monitoring terminals as needed. The circuit breaker intelligent control module receives the closing or opening signals. When the circuit breaker intelligent control module receives the opening signal, it switches the modular vacuum circuit breaker from the closing state to the opening state. When it receives the closing signal, it switches the modular vacuum circuit breaker from the opening state to the closing state.

[0044] The action execution monitoring module monitors the opening and closing actions of the modular vacuum circuit breaker. Through analysis, it determines whether the execution of the corresponding actions meets the requirements and sends the judgment information to the remote monitoring terminal. This allows remote supervisors to have detailed information on each action execution of the modular vacuum circuit breaker, facilitating timely and appropriate improvement measures to ensure the effectiveness of subsequent actions. The specific analysis process of the action execution monitoring module is as follows:

[0045] The time taken for the modular vacuum circuit breaker to complete the corresponding action is obtained and marked as the action time measurement value (i.e., the time required for the modular vacuum circuit breaker to complete the opening or closing action from receiving the operation signal. The smaller the action time measurement value, the faster the circuit breaker's response speed and the more timely the protection of the power system).

[0046] Furthermore, the average speed at which the modular vacuum circuit breaker performs the corresponding action is marked as the action speed measurement value (referring to the average speed of the circuit breaker from receiving the corresponding operation signal to fully opening or closing. If the opening / closing speed is too fast, it will easily lead to an increase in the mechanical vibration value of the circuit breaker, which is detrimental to the breaking performance of the circuit breaker; if the opening / closing speed is too slow, it will easily lead to an excessively long duration of short-circuit faults in the power grid, causing overvoltage and overcurrent in the power system, and even damaging the power equipment). The difference between the action speed measurement value and the median value of the preset standard action speed measurement value range is calculated, and the absolute value is taken to obtain the action speed analysis value.

[0047] And the action trajectory output value is obtained by analyzing the motion trajectory of the moving contact. Specifically, the actual motion trajectory of the moving contact is obtained when the modular vacuum circuit breaker performs the corresponding action. The actual motion trajectory is overlapped with the corresponding standard motion trajectory. The percentage of overlap between the actual motion trajectory and the corresponding standard motion trajectory is marked as the action trajectory overlap detection value.

[0048] Furthermore, based on the actual motion trajectory and the corresponding standard motion trajectory, the position where the trajectory deviates first is identified and marked as the trajectory deviance point. The number of trajectory deviance points during the corresponding action is obtained and marked as the action trajectory deviance detection value.

[0049] The motion trajectory output value PL is obtained by numerically calculating the motion trajectory overlap value PY and the motion trajectory de-detection value PM using the formula PL=sy1 / PY+sy2*PM; where sy1 and sy2 are preset proportional coefficients, sy1>sy2>0; and the larger the value of the motion trajectory output value PL, the less the motion trajectory of the modular vacuum circuit breaker performing the corresponding action meets the requirements.

[0050] The action execution monitoring value HP is obtained by numerically calculating the measured value HN during action, the action speed analysis value HS, and the action trajectory output value PL using the formula HP=(re1*HN+re2*HS+re3*PL) / 3. Among them, re1, re2, and re3 are preset proportional coefficients with values ​​greater than zero. Furthermore, the larger the value of the action execution monitoring value HP, the worse the overall performance of the modular vacuum circuit breaker in performing the corresponding action.

[0051] The action execution monitoring value HP is compared with the corresponding preset action execution monitoring threshold. If the action execution monitoring value HP exceeds the preset action execution monitoring threshold, it indicates that the overall performance of the modular vacuum circuit breaker in performing the corresponding action is poor. In this case, the corresponding action is judged to be non-compliant and the corresponding action execution operation is marked as a non-optimal operation. If the action execution monitoring value HP does not exceed the preset action execution monitoring threshold, it indicates that the overall performance of the modular vacuum circuit breaker in performing the corresponding action is good. In this case, the corresponding action is judged to be compliant and the corresponding action execution operation is marked as a qualified operation.

[0052] The closing status monitoring module performs closing anomaly analysis on the modular vacuum circuit breaker when it is in the closed state. This analysis generates a closing status warning signal or a closing status normality signal, which is then sent to the remote monitoring terminal. Upon receiving the closing status warning signal, the remote monitoring terminal issues a corresponding alert to remind remote monitoring personnel to take timely corrective measures, thereby ensuring closing safety. The specific analysis process of the closing status monitoring module is as follows:

[0053] The closing force curve of the modular vacuum circuit breaker per unit time was collected (closing force is the key force to ensure that the moving contact and stationary contact can make close contact and maintain the closed state when the circuit breaker is closed). A rectangular coordinate system located in the first quadrant was established with time as the X-axis and closing force as the Y-axis. The closing force curve was placed in the rectangular coordinate system, and the starting point of the closing force curve was located on the Y-axis.

[0054] In a rectangular coordinate system, construct a closed calibration ray parallel to the X-axis with its endpoint on the Y-axis. It should be noted that the Y-axis coordinate value corresponding to the closed calibration ray represents the preset closing force threshold, where the preset closing force threshold is a positive number. The closed region enclosed by the portion of the closing force curve below the closed calibration ray and the closed calibration ray is marked as a non-tight region.

[0055] All non-tight regions are obtained, and the area of ​​the corresponding non-tight region is marked as the non-tight analysis value. The non-tight analysis values ​​of all non-tight regions are summed to obtain the non-tight coefficient. The non-tight coefficient is compared with the preset non-tight coefficient threshold. If the non-tight coefficient exceeds the preset non-tight coefficient threshold, it indicates that it is difficult to make the moving contact and stationary contact tightly contact and keep them closed under the closing state. Then, a closing state warning signal is generated.

[0056] Furthermore, if the non-tight coefficient does not exceed the preset non-tight coefficient threshold, the non-tight analysis value is compared with the preset non-tight analysis threshold. If the non-tight analysis value exceeds the preset non-tight analysis threshold, the corresponding non-tight area is marked as an emergency area; the number of emergency areas is marked as the non-tight risk value; and the non-tight analysis value with the largest value is marked as the non-tight amplitude value.

[0057] Through formula The non-tightening coefficient XR, non-tightening risk value XL, and non-tightening amplitude value XW are numerically calculated to obtain the closing status monitoring value XN; where wq1, wq2, and wq3 are preset proportional coefficients, wq2 > wq3 > wq1 > 0.36; and the larger the value of the closing status monitoring value XN, the worse the overall closing performance of the modular vacuum circuit breaker is.

[0058] The closing status monitoring value XN is compared with the preset closing status monitoring threshold. If the closing status monitoring value XN exceeds the preset closing status monitoring threshold, it indicates that the current closing performance of the modular vacuum circuit breaker is poor overall, and a closing status warning signal is generated. If the closing status monitoring value XN does not exceed the preset closing status monitoring threshold, it indicates that the current closing performance of the modular vacuum circuit breaker is good overall, and a closing status normal signal is generated.

[0059] The tripping status monitoring module performs tripping anomaly analysis on the modular vacuum circuit breaker when it is in the tripped state. This analysis generates either a tripping status warning signal or a tripping status normal signal, which is then sent to the remote monitoring terminal. Upon receiving the tripping status warning signal, the remote monitoring terminal issues a corresponding alert to remind remote monitoring personnel to take timely corrective measures, thereby ensuring tripping safety. The specific analysis process of the tripping status monitoring module is as follows:

[0060] The distance between the moving and stationary contacts in the modular vacuum circuit breaker is collected in real time and marked as the moving-stationary distance detection value. It should be noted that the smaller the value of the moving-stationary distance detection value, the more difficult it is to ensure that the circuit breaker reliably isolates the circuit in the open state, and the greater the safety risk. All moving-stationary distance detection values ​​are obtained within a unit time, and the moving-stationary distance detection value with the smallest value is marked as the moving-stationary opening distance value. The variance of all moving-stationary distance detection values ​​within a unit time is calculated to obtain the moving-stationary distance wave value.

[0061] The dynamic-static opening distance value and dynamic-static opening distance waveform value are compared with the preset dynamic-static opening distance threshold and preset dynamic-static opening distance waveform threshold respectively. If the dynamic-static opening distance value does not exceed the preset dynamic-static opening distance threshold or the dynamic-static opening distance waveform value exceeds the preset dynamic-static opening distance waveform threshold, it indicates that the current opening performance of the modular vacuum circuit breaker is poor, and a opening status warning signal is generated. If the dynamic-static opening distance value exceeds the preset dynamic-static opening distance threshold and the dynamic-static opening distance waveform value does not exceed the preset dynamic-static opening distance waveform threshold, it indicates that the current opening performance of the modular vacuum circuit breaker is good, and a opening status no abnormality signal is generated.

[0062] Example 2: Figure 2 As shown, the difference between this embodiment and Embodiment 1 is that the remote monitoring terminal is connected to the circuit breaker analysis and reminder module. This module is used to set the detection period, preferably seven days. During the detection period, the operational performance of the modular vacuum circuit breaker is analyzed to determine whether a circuit breaker quality warning signal should be generated. When a warning signal is generated, it is sent to the remote monitoring terminal. Upon receiving the warning signal, the remote monitoring terminal issues a corresponding warning to remind remote supervisors to strengthen the monitoring of the modular vacuum circuit breaker's operation or replace it promptly, thereby ensuring subsequent effectiveness and safety. The specific analysis process of the circuit breaker analysis and reminder module is as follows:

[0063] The number of non-optimal operations performed during the detection period was collected and compared with the total number of opening and closing operations of the modular vacuum circuit breaker during the detection period to obtain the circuit breaker execution abnormality value. The number of closing status warning signals and the number of opening status warning signals generated by the modular vacuum circuit breaker during the detection period were marked as closing warning detection value and opening warning detection value, respectively.

[0064] Through formula The circuit breaker warning coefficient TL is obtained by numerically calculating the circuit breaker execution abnormality value TR, closing warning detection value TF, and opening warning detection value TN. Among them, es1, es2, and es3 are preset proportional coefficients, and the values ​​of es1, es2, and es3 are all positive numbers. Furthermore, the larger the value of the circuit breaker warning coefficient TL, the worse the overall operating condition of the modular vacuum circuit breaker is during the detection period.

[0065] The circuit breaker warning coefficient TL is compared with the preset circuit breaker warning coefficient threshold. If the circuit breaker warning coefficient TL exceeds the preset circuit breaker warning coefficient threshold, it indicates that the overall operating condition of the modular vacuum circuit breaker during the testing period is poor. It is necessary to strengthen the operation supervision of the modular vacuum circuit breaker or replace the circuit breaker in the future. Then, a circuit breaker quality warning signal is generated.

[0066] The working principle of this invention is as follows: During use, the intelligent control module of the circuit breaker switches the modular vacuum circuit breaker between closed and open states based on closing and opening signals, ensuring the safety of the power grid. The action execution monitoring module monitors the opening and closing actions of the modular vacuum circuit breaker to determine whether the corresponding actions meet the requirements. This allows remote monitoring personnel to promptly take reasonable improvement measures for the modular vacuum circuit breaker, ensuring the effectiveness of its subsequent actions. Furthermore, the closing and opening status monitoring modules perform anomaly analysis on the closing and opening states of the modular vacuum circuit breaker, respectively. When a closing or opening status warning signal is generated, it alerts remote monitoring personnel to take timely corrective measures. This achieves effective monitoring and control of the modular vacuum circuit breaker, significantly improving its operational safety and reducing the monitoring difficulty for remote personnel, demonstrating a high degree of intelligence.

[0067] The above formulas are all dimensionless numerical calculations. These formulas are derived from software simulations using collected data to obtain the most recent real-world results. The preset parameters in the formulas are set by those skilled in the art according to actual conditions. The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. The preferred embodiments do not describe all details exhaustively, nor do they limit the invention to specific implementations. Obviously, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An intelligent control system for a modular vacuum circuit breaker, characterized in that, The circuit breaker intelligent control module comprises a power grid intelligent monitoring transmission module, a circuit breaker intelligent control module, an action execution monitoring module, a closing state monitoring module, an opening state monitoring module and a remote monitoring terminal. The power grid intelligent monitoring transmission module monitors the power grid line corresponding to the modularized vacuum circuit breaker, generates an opening signal when an overload or short-circuit fault is detected, and sends the opening signal to the circuit breaker intelligent control module. The circuit breaker intelligent control module switches the modularized vacuum circuit breaker from the closing state to the opening state when the opening signal is received, and switches the modularized vacuum circuit breaker from the opening state to the closing state when the closing signal is received. The action execution monitoring module monitors the opening and closing actions of the modularized vacuum circuit breaker, analyzes to determine whether the execution of the corresponding action meets the requirements, and sends the judgment information of the corresponding action to the remote monitoring terminal. The closing state monitoring module and the opening state monitoring module respectively analyze the closing state and the opening state of the modularized vacuum circuit breaker, analyze to generate a closing state early warning signal or a closing state no anomaly signal and an opening state early warning signal or an opening state no anomaly signal. The specific analysis process of the action execution monitoring module includes: The time length of the completion of the corresponding action of the modularized vacuum circuit breaker is obtained and marked as an action time measurement value, and the average speed of the execution of the corresponding action of the modularized vacuum circuit breaker is obtained and marked as an action speed measurement value. The action speed measurement value is compared with the median value of the preset standard action speed measurement value range, and the absolute value is obtained by difference calculation to obtain an action speed analysis value. The action time measurement value, the action speed analysis value and the action trajectory output value are calculated to obtain an action execution monitoring value. The action execution monitoring value is compared with the corresponding preset action execution monitoring threshold value. If the action execution monitoring value exceeds the preset action execution monitoring threshold value, it is determined that the execution of the corresponding action does not meet the requirements, and the corresponding action execution operation is marked as an execution non-optimal operation. If the action execution monitoring value does not exceed the preset action execution monitoring threshold value, it is determined that the execution of the corresponding action meets the requirements, and the corresponding action execution operation is marked as an execution qualified operation. The specific analysis process of the action execution monitoring module includes: The actual movement trajectory of the moving contact when the modularized vacuum circuit breaker executes the corresponding action is obtained, and the actual movement trajectory is detected with the corresponding standard movement trajectory. The overlapping percentage of the actual movement trajectory and the corresponding standard movement trajectory is marked as an action trajectory overlap detection value. The position where the trajectory starts to deviate is identified based on the actual movement trajectory and the corresponding standard movement trajectory, and is marked as a trajectory deviation point. The number of trajectory deviation points in the corresponding action process is obtained and marked as an action trajectory deviation detection value. The action trajectory output value is obtained by numerically calculating the action trajectory overlap detection value and the action trajectory deviation detection value. The specific analysis process of the closing state monitoring module includes: The closing force curve of the modular vacuum circuit breaker in a unit time is collected, a straight coordinate system in the first quadrant is established with time as the X-axis and closing force as the Y-axis, the closing force curve is placed in the straight coordinate system, and the starting point of the closing force curve is located on the Y-axis; A closing calibration ray parallel to the X-axis and with the end point located on the Y-axis is drawn in the straight coordinate system, and the closed area surrounded by the closing force curve and the closing calibration ray is marked as a non-tight area; All non-tight areas are obtained, the area of the corresponding non-tight area is marked as a non-tight analysis value, the non-tight analysis values of all non-tight areas are summed to obtain a non-tight coefficient, the non-tight coefficient is compared with a preset non-tight coefficient threshold value, if the non-tight coefficient exceeds the preset non-tight coefficient threshold value, a closing state early warning signal is generated; If the non-tight coefficient does not exceed the preset non-tight coefficient threshold value, the non-tight analysis value is compared with a preset non-tight analysis threshold value, if the non-tight analysis value exceeds the preset non-tight analysis threshold value, the corresponding non-tight area is marked as an emergency area, the number of the emergency areas is marked as a non-tight risk value, and the non-tight analysis value with the largest value is marked as a non-tight amplitude value; The closing state monitoring value is obtained by numerically calculating the non-tight coefficient, the non-tight risk value and the non-tight amplitude value, the closing state monitoring value is compared with a preset closing state monitoring threshold value, if the closing state monitoring value exceeds the preset closing state monitoring threshold value, a closing state early warning signal is generated, and if the closing state monitoring value does not exceed the preset closing state monitoring threshold value, a closing state no-abnormal signal is generated; The specific analysis process of the opening state monitoring module is as follows: The distance between the moving contact and the static contact in the modular vacuum circuit breaker is collected in real time and marked as a moving-static distance detection value, all moving-static distance detection values in a unit time are obtained, the moving-static distance detection value with the smallest value is marked as a moving-static opening distance value, and the variance of all moving-static distance detection values in the unit time is calculated to obtain a moving-static distance wave value; The moving-static opening distance value and the moving-static distance wave value are compared with a preset moving-static opening distance threshold value and a preset moving-static distance wave threshold value respectively, if the moving-static opening distance value does not exceed the preset moving-static opening distance threshold value or the moving-static distance wave value exceeds the preset moving-static distance wave threshold value, an opening state early warning signal is generated, and if the moving-static opening distance value exceeds the preset moving-static opening distance threshold value and the moving-static distance wave value does not exceed the preset moving-static distance wave threshold value, an opening state no-abnormal signal is generated.

2. The intelligent control system of a modular vacuum circuit breaker according to claim 1, wherein, The remote monitoring terminal is communicatively connected to the circuit breaker analysis and reminding module, the circuit breaker analysis and reminding module is used to set a detection period, a circuit breaker reminding coefficient is obtained by numerically calculating the circuit breaker execution abnormal value, the closing early warning detection value and the opening early warning detection value, if the circuit breaker reminding coefficient exceeds a preset circuit breaker reminding coefficient threshold value, a circuit breaker quality early warning signal is generated, and the circuit breaker quality early warning signal is sent to the remote monitoring terminal when it is generated.

3. A modular vacuum circuit breaker, characterized by, The modular vacuum circuit breaker adopts the intelligent control system of the modular vacuum circuit breaker according to any one of claims 1-2.

Images