Modularized vacuum circuit breaker and intelligent control system thereof

Abstract

The invention belongs to the technical field of vacuum circuit breaker management and control, and particularly relates to a modular vacuum circuit breaker and an intelligent control system thereof, the intelligent control system 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; according to the invention, the circuit breaker intelligent control module enables the modular vacuum circuit breaker to switch between a closing state and an opening state, and the action execution monitoring module monitors the opening and closing actions of the modular vacuum circuit breaker to judge whether the execution of the corresponding actions meets the requirements or not. The switching-on state monitoring module and the switching-off state monitoring module carry out abnormal analysis on the switching-on state and the switching-off state of the modular vacuum circuit breaker respectively, effective monitoring and control of the modular vacuum circuit breaker are achieved, the use safety of the modular vacuum circuit breaker is remarkably improved, and the supervision difficulty of remote supervision personnel is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum circuit breaker management and control, and in particular to a modular vacuum circuit breaker and an intelligent control system thereof. Background Art

[0002] Modular vacuum circuit breaker is a high-voltage switchgear that uses vacuum as an insulating and arc-extinguishing medium. Its structure is divided into multiple independent modules, each module has different functions, and these modules can be interconnected and work together to achieve the overall function of the circuit breaker. As an important part of the power system, the performance of modular vacuum circuit breaker directly affects the stable operation of the power system.

[0003] A Chinese invention patent with publication number CN102412547A discloses a control device for an outdoor high-voltage AC vacuum circuit breaker, which detects the current vector value of a three-phase line and compares it with the protection value to determine whether a three-phase unbalanced fault occurs in the line, thereby achieving zero-sequence protection;

[0004] However, in actual use, it is impossible to effectively monitor each execution action of the circuit breaker and reasonably evaluate its execution performance, and it is impossible to make abnormal judgments on the closing and opening states of the circuit breaker and comprehensively analyze the performance of the circuit breaker, which increases the difficulty of monitoring and controlling the operation of the circuit breaker and is not conducive to the management personnel to make reasonable improvement measures for the circuit breaker in a timely manner;

[0005] In view of the above technical defects, a solution is now proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a modular vacuum circuit breaker and an intelligent control system thereof, which solves the problems that the prior art is unable to effectively monitor each execution action of the modular vacuum circuit breaker and reasonably evaluate its execution performance, and is unable to make abnormal judgments on the closing state and opening state of the circuit breaker and comprehensively analyze the performance of the circuit breaker, and the circuit breaker operation monitoring and control is difficult.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] An intelligent control system for a modular vacuum circuit breaker, comprising a power grid intelligent monitoring and 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;

[0009] The grid intelligent monitoring and transmission module monitors the grid line corresponding to the modular vacuum circuit breaker, identifies the overload or short circuit fault of the corresponding grid line, 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] The supervisor sends an opening signal or a closing signal through the remote monitoring terminal. The circuit breaker intelligent control module switches the modular vacuum circuit breaker from the closing state to the opening state when receiving the opening signal, and switches the modular vacuum circuit breaker from the opening state to the closing state when receiving the closing signal;

[0011] The action execution monitoring module monitors the opening and closing actions of the modular vacuum circuit breaker, determines whether the execution of the corresponding action meets the requirements through analysis, and sends the judgment information of the corresponding action to the remote monitoring terminal;

[0012] The closing state monitoring module is used to analyze the closing abnormality of the modular vacuum circuit breaker when it is in the closing state, generate a closing state warning signal or a closing state normal signal through analysis, and send the closing state warning signal or the closing state normal signal to the remote monitoring terminal;

[0013] The opening state monitoring module is used to analyze the opening abnormality of the modular vacuum circuit breaker when it is in the opening state, generate an opening state warning signal or an opening state normal signal through analysis, and send the opening state warning signal or the opening state normal signal to the remote monitoring terminal.

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

[0015] The time length for the modular vacuum circuit breaker to complete the corresponding action is obtained and marked as the action time measurement value, and the average speed of the modular vacuum circuit breaker to perform the corresponding action is marked as the action speed measurement value, and the action speed measurement value is compared with the median value of the preset standard action speed measurement value range to perform difference calculation and take the absolute value to obtain the action speed analysis value;

[0016] And by inspecting and analyzing the motion trajectory of the moving contact to obtain the action trajectory output value, the action time measurement value, the action quick analysis value and the action trajectory output value are numerically calculated to obtain the action execution monitoring value, and the action execution monitoring value is numerically compared with the corresponding preset action execution monitoring threshold. If the action execution monitoring value exceeds the preset action execution monitoring threshold, it is judged that the execution of the corresponding action does not meet the requirements and the corresponding action execution operation is marked as a non-optimal operation; if the action execution monitoring value does not exceed the preset action execution monitoring threshold, it is judged that the execution of the corresponding action meets the requirements and the corresponding action execution operation is marked as a qualified operation.

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

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

[0019] And based on the actual motion trajectory and the corresponding standard motion trajectory, the position where the trajectory deviation begins to occur is identified and marked as the trajectory deviation point, the number of trajectory deviation points in the corresponding action process is obtained and marked as the action track deviation detection value; the action trajectory output value is obtained by numerically calculating the action track overlap detection value and the action track deviation detection value.

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

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

[0022] In the rectangular coordinate system, a closed calibration ray is drawn which is parallel to the X-axis and whose end point is on the Y-axis, and the closed area enclosed by the part of the closing force curve below the closed calibration ray and the closed calibration ray is marked as a non-tight area;

[0023] 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 up to obtain a non-tight coefficient, the non-tight coefficient is numerically compared with a preset non-tight coefficient threshold, and if the non-tight coefficient exceeds the preset non-tight coefficient threshold, a closing state 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 numerically compared with the preset non-tight analysis threshold, and 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 a non-tight risk value, and the non-tight analysis value with the largest value is marked as a non-tight analysis amplitude value;

[0025] 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, and the closing state monitoring value is numerically compared with the preset closing state monitoring threshold. If the closing state monitoring value exceeds the preset closing state monitoring threshold, a closing state warning signal is generated; if the closing state monitoring value does not exceed the preset closing state monitoring threshold, a closing state normal signal is generated.

[0026] Furthermore, the specific analysis process of the opening state 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 dynamic and static distance detection value, all the dynamic and static distance detection values ​​in a unit time are obtained, and the dynamic and static distance detection value with the smallest value is marked as the dynamic and static opening distance value, and the variance of all the dynamic and static distance detection values ​​in a unit time is calculated to obtain the dynamic and static distance wave value;

[0028] The dynamic and static opening distance value and the dynamic and static distance wave value are numerically compared with the preset dynamic and static opening distance threshold and the preset dynamic and static distance wave threshold 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 gate opening 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 gate opening status normal signal is generated.

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

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

[0031] The number of non-optimal operations performed during the detection period is collected and the ratio thereof is calculated with the total number of opening and closing actions performed by the modular vacuum circuit breaker during the detection period to obtain the circuit breaker execution abnormality value, and the number of closing state warning signals generated by the modular vacuum circuit breaker during the detection period and the number of opening state warning signals generated are marked as closing warning detection value and opening warning detection value respectively;

[0032] The circuit breaker reminder coefficient is obtained by numerically calculating the circuit breaker execution abnormal occupancy value, closing warning detection value and opening warning detection value, and the circuit breaker reminder coefficient is numerically compared with the preset circuit breaker reminder coefficient threshold. If the circuit breaker reminder coefficient exceeds the preset circuit breaker reminder 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 modular vacuum circuit breaker mentioned above.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. In the present invention, the modular vacuum circuit breaker is switched between the closing state and the opening state 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 execution of the corresponding action meets the requirements, and the closing state monitoring module and the opening state monitoring module respectively perform abnormal analysis on the closing state and the opening state of the modular vacuum circuit breaker, thereby realizing effective monitoring and control of the modular vacuum circuit breaker, significantly improving the use safety of the modular vacuum circuit breaker and reducing the supervision difficulty of remote supervisors;

[0036] 2. In the present invention, the operating performance of the modular vacuum circuit breaker during the detection period is analyzed by the circuit breaker analysis reminder module, and the analysis is used to determine whether a circuit breaker quality warning signal is generated. When the circuit breaker quality warning signal is generated, the remote supervision personnel are reminded to strengthen the subsequent operation supervision of the modular vacuum circuit breaker or replace the circuit breaker in time to ensure the subsequent use effect and safety, further reduce the difficulty of supervision of the modular vacuum circuit breaker, and have a high degree of intelligence. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with 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 DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Embodiment 1: Figure 1 As shown, a modular vacuum circuit breaker proposed in the present invention, 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 state monitoring module, an opening state monitoring module and a remote monitoring terminal;

[0042] The grid intelligent monitoring and transmission module monitors the grid line corresponding to the modular vacuum circuit breaker, identifies overload or short-circuit faults of the corresponding grid line, 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 cut off the corresponding grid circuit, prevent the fault from expanding, and protect the safety of power equipment and power systems.

[0043] And the supervisor can send an opening signal or a closing signal through the remote monitoring terminal as needed, and the circuit breaker intelligent control module receives the closing signal or the opening signal. When the circuit breaker intelligent control module receives the opening signal, the modular vacuum circuit breaker switches from the closing state to the opening state, and when the circuit breaker receives the closing signal, the modular vacuum circuit breaker switches 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, and judges whether the execution of the corresponding action meets the requirements through analysis, and sends the judgment information of the corresponding action to the remote monitoring terminal, so that the remote supervisor can grasp the action execution information of the modular vacuum circuit breaker in detail, which is conducive to the remote supervisor to make reasonable improvement measures for the modular vacuum circuit breaker in time to ensure the subsequent action execution effect; the specific analysis process of the action execution monitoring module is as follows:

[0045] The duration for the modular vacuum circuit breaker to complete the corresponding action is obtained and marked as the measured value during action (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 measured value during action, the faster the response speed of the circuit breaker and the more timely the protection of the power system);

[0046] 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 the time of complete opening or closing. If the opening / closing speed is too fast, it is easy to increase the mechanical vibration value of the circuit breaker, which is not good for the breaking performance of the circuit breaker; if the opening / closing speed is too slow, it is easy to cause the short-circuit fault of the power grid to last too long, causing overvoltage and overcurrent in the power system, and even damaging power equipment). The action speed measurement value is compared with the median value of the preset standard action speed measurement value range to perform difference calculation and take the absolute value to obtain the action speed analysis value;

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

[0048] Based on the actual motion trajectory and the corresponding standard motion trajectory, the position where the trajectory deviation begins to occur is identified and marked as the trajectory deviation point, and the number of trajectory deviation points in the corresponding action process is obtained and marked as the action trajectory deviation detection value;

[0049] The action trajectory output value PL is obtained by numerically calculating the action track overlap detection value PY and the action track decoupling detection value PM through the formula PL=sy1 / PY+sy2*PM; wherein sy1 and sy2 are preset proportional coefficients, sy1>sy2>0; and the larger the value of the action trajectory output value PL is, 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 action time measurement value HN, the action quick analysis value HS and the action trajectory output value PL through the formula HP=(re1*HN+re2*HS+re3*PL) / 3; wherein re1, re2 and re3 are preset proportional coefficients with values ​​greater than zero, and the larger the value of the action execution monitoring value HP is, the worse the execution performance of the modular vacuum circuit breaker in executing the corresponding action is in general;

[0051] The action execution monitoring value HP is numerically 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 execution performance of the modular vacuum circuit breaker in executing the corresponding action is poor overall. In this case, the execution of the corresponding action is judged not to meet the requirements 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 execution performance of the modular vacuum circuit breaker in executing the corresponding action is good overall. In this case, the execution of the corresponding action is judged to meet the requirements and the corresponding action execution operation is marked as a qualified operation.

[0052] The closing state monitoring module analyzes the closing abnormality of the modular vacuum circuit breaker when it is in the closing state, generates a closing state warning signal or a closing state normal signal through analysis, and sends the closing state warning signal or the closing state normal signal to the remote monitoring terminal. When the remote monitoring terminal receives the closing state warning signal, it issues a corresponding warning to remind the remote supervisor to take corresponding improvement measures in time, so as to ensure the safety of closing. The specific analysis process of the closing state monitoring module is as follows:

[0053] The closing force curve of the modular vacuum circuit breaker in unit time is collected (closing force is the key force to ensure that the moving contact and the static contact can be in close contact and maintain the closed state when the circuit breaker is in the closed state), and a rectangular coordinate system located 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 rectangular coordinate system, and the starting point of the closing force curve is located on the Y-axis;

[0054] In a rectangular coordinate system, a closed calibration ray is drawn which is parallel to the X-axis and whose endpoint is located on the Y-axis. It should be noted that the Y-axis coordinate value corresponding to the closed calibration ray represents a preset closing force threshold, wherein the value of the preset closing force threshold is a positive number; the portion of the closing force curve below the closed calibration ray and the closed area enclosed by the closed calibration ray are marked as a non-tight area;

[0055] 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 up to obtain a non-tight coefficient, and the non-tight coefficient is numerically compared with a 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 the static contact in close contact and maintain a closed state in the closed state, and a closing state warning signal is generated.

[0056] Further, if the non-tight coefficient does not exceed the preset non-tight coefficient threshold, the non-tight analysis value is numerically compared with the preset non-tight analysis threshold, and 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 a non-tight risk value, and the non-tight analysis value with the largest value is marked as a non-tight analysis amplitude value;

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

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

[0059] The opening state monitoring module analyzes the opening abnormality of the modular vacuum circuit breaker when it is in the opening state, generates an opening state warning signal or an opening state normal signal through analysis, and sends the opening state warning signal or the opening state normal signal to the remote monitoring terminal. When the remote monitoring terminal receives the opening state warning signal, it issues a corresponding warning to remind the remote supervisor to take corresponding improvement measures in time, so as to ensure the safety of the opening. The specific analysis process of the opening state monitoring module is as follows:

[0060] 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 dynamic and static distance detection value. It should be noted that the smaller the value of the dynamic and static distance detection value is, the more difficult it is to ensure that the circuit breaker can reliably isolate the circuit in the disconnected state, and the greater the safety risk. All dynamic and static distance detection values ​​in a unit time are obtained, and the dynamic and static distance detection value with the smallest value is marked as the dynamic and static opening distance value, and the variance of all dynamic and static distance detection values ​​in a unit time is calculated to obtain the dynamic and static distance wave value;

[0061] The dynamic-static opening distance value and the dynamic-static distance wave value are numerically compared with the preset dynamic-static opening distance threshold and the preset dynamic-static distance wave threshold respectively. If the dynamic-static opening distance value does not exceed the preset dynamic-static opening distance threshold or the dynamic-static distance wave value exceeds the preset dynamic-static distance wave 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 distance wave value does not exceed the preset dynamic-static distance wave threshold, it indicates that the current opening performance of the modular vacuum circuit breaker is good, and a opening status normal signal is generated.

[0062] Embodiment 2: Figure 2 As shown, the difference between this embodiment and the first embodiment is that the remote monitoring terminal is connected to the circuit breaker analysis and reminder module in communication, and the circuit breaker analysis and reminder module is used to set the detection period, preferably, the detection period is seven days; the operation performance of the modular vacuum circuit breaker during the detection period is analyzed, and it is determined whether to generate a circuit breaker quality warning signal through analysis, and when the circuit breaker quality warning signal is generated, it is sent to the remote monitoring terminal, and the remote monitoring terminal issues a corresponding warning when receiving the circuit breaker quality warning signal, so as to remind the remote supervisor to strengthen the operation supervision of the modular vacuum circuit breaker in the future, or replace the circuit breaker in time, so as to ensure the subsequent use effect 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 is collected and the ratio thereof is calculated with the total number of opening and closing actions performed by the modular vacuum circuit breaker during the detection period to obtain the circuit breaker execution abnormality value, and the number of closing state warning signals generated by the modular vacuum circuit breaker during the detection period and the number of opening state warning signals generated are marked as closing warning detection value and opening warning detection value respectively;

[0064] By formula The circuit breaker execution abnormal occupation value TR, closing warning detection value TF and opening warning detection value TN are numerically calculated to obtain the circuit breaker reminder coefficient TL; wherein es1, es2, es3 are preset proportional coefficients, and the values ​​of es1, es2, es3 are all positive numbers; and the larger the value of the circuit breaker reminder coefficient TL, the worse the overall operating condition of the modular vacuum circuit breaker during the detection period;

[0065] The circuit breaker reminder coefficient TL is numerically compared with the preset circuit breaker reminder coefficient threshold. If the circuit breaker reminder coefficient TL exceeds the preset circuit breaker reminder coefficient threshold, it indicates that the overall operating condition of the modular vacuum circuit breaker during the detection period is poor, and 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 the present invention is as follows: when in use, the modular vacuum circuit breaker is switched between the closing state and the opening state based on the closing signal and the opening signal through the circuit breaker intelligent control module to ensure the safety of the power grid line, and the opening and closing actions of the modular vacuum circuit breaker are monitored through the action execution monitoring module to determine whether the execution of the corresponding action meets the requirements, which is conducive to the remote supervision personnel to make reasonable improvement measures for the modular vacuum circuit breaker in time to ensure the subsequent action execution effect, and the closing state and the opening state of the modular vacuum circuit breaker are analyzed for abnormalities through the closing state monitoring module and the opening state monitoring module, and when the closing state warning signal or the opening state warning signal is generated, the remote supervision personnel are reminded to make corresponding improvement measures in time, so as to realize effective monitoring and control of the modular vacuum circuit breaker, significantly improve the use safety of the modular vacuum circuit breaker and reduce the supervision difficulty of the remote supervision personnel, and the intelligent degree is high.

[0067] The above formulas are all dimensionless and numerical calculations. The formula is a formula obtained by collecting a large amount of data and performing software simulation to obtain the most recent real situation. The preset parameters in the formula are set by technicians in this field according to actual conditions. The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the contents of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that technicians in the relevant technical field can understand and use the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. An intelligent control system for a modular vacuum circuit breaker, characterized in that: It includes a power grid intelligent monitoring and 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 grid intelligent monitoring and transmission module monitors the grid line corresponding to the modular vacuum circuit breaker, 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; The circuit breaker intelligent control module switches the modular vacuum circuit breaker from the closed state to the open state when receiving the opening signal, and switches the modular vacuum circuit breaker from the open state to the closed state when receiving the closing signal; The action execution monitoring module monitors the opening and closing actions of the modular vacuum circuit breaker, determines whether the execution of the corresponding action meets the requirements through analysis, 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 perform abnormal analysis on the closing state and opening state of the modular vacuum circuit breaker respectively, and generate a closing state warning signal or a closing state normal signal and an opening state warning signal or an opening state normal signal through analysis.

2. The intelligent control system of a modular vacuum circuit breaker according to claim 1, characterized in that: The specific analysis process of the action execution monitoring module includes: The motion trajectory of the moving contact is inspected and analyzed to obtain the action trajectory output value, and the action time measurement value, action quick analysis value and action trajectory output value are numerically calculated to obtain the action execution monitoring value. If the action execution monitoring value exceeds the preset action execution monitoring threshold, it is judged that the execution of the corresponding action does not meet the requirements and the corresponding action execution operation is marked as a non-optimal operation; if the action execution monitoring value does not exceed the preset action execution monitoring threshold, it is judged that the execution of the corresponding action meets the requirements and the corresponding action execution operation is marked as a qualified operation.

3. The intelligent control system of a modular vacuum circuit breaker according to claim 2, characterized in that: The specific analysis process of the moving contact motion trajectory inspection and analysis is as follows: The actual motion trajectory of the moving contact of the modular vacuum circuit breaker when performing the corresponding action is obtained, and the overlapping percentage of the actual motion trajectory and the corresponding standard motion trajectory is marked as the action track overlap detection value. The number of trajectory deviation points during the corresponding action process is obtained and marked as the action track deviation detection value; the action trajectory output value is obtained by numerically calculating the action track overlap detection value and the action track deviation detection value.

4. The intelligent control system of a modular vacuum circuit breaker according to claim 1, characterized in that: The specific analysis process of the closing status monitoring module includes: All non-tight areas are obtained, the area of ​​the corresponding non-tight area is marked as a non-tight analysis value, and the non-tight analysis values ​​of all non-tight areas are summed up to obtain a non-tight coefficient. If the non-tight coefficient exceeds a preset non-tight coefficient threshold, a closing state warning signal is generated.

5. The intelligent control system of a modular vacuum circuit breaker according to claim 4, characterized in that: If the non-tightness coefficient does not exceed the preset non-tightness coefficient threshold, the closing state monitoring value is obtained by numerically calculating the non-tightness coefficient, the non-tightness risk value and the non-tightness amplitude value. If the closing state monitoring value exceeds the preset closing state monitoring threshold, a closing state warning signal is generated; If the closing state monitoring value does not exceed the preset closing state monitoring threshold, a closing state normal signal is generated.

6. The intelligent control system of a modular vacuum circuit breaker according to claim 1, characterized in that: The specific analysis process of the trip status monitoring module is as follows: 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 trip state 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 trip state normal signal is generated.

7. The intelligent control system of a modular vacuum circuit breaker according to claim 1, characterized in that: The remote monitoring terminal is communicated with the circuit breaker analysis and reminder module. The circuit breaker analysis and reminder module is used to set the detection period. The circuit breaker reminder coefficient is obtained by numerically calculating the circuit breaker execution abnormal occupation value, closing warning detection value and opening warning detection value. If the circuit breaker reminder coefficient exceeds the preset circuit breaker reminder coefficient threshold, a circuit breaker quality warning signal is generated. When the circuit breaker quality warning signal is generated, it is sent to the remote monitoring terminal.

8. A modular vacuum circuit breaker, characterized in that: The modular vacuum circuit breaker adopts the intelligent control system of the modular vacuum circuit breaker as claimed in any one of claims 1 to 7.

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