Disconnecting switch closing process state detection method and device and self-detection disconnecting switch

Abstract

The invention relates to an isolating switch closing process state detection method and device and a self-detection isolating switch. According to the method, when a switching-on signal is received, a laser range finder is synchronously controlled to rotate from a first support to a second support, then distance data collected by the laser range finder in the rotation process are obtained, and the switching-on detection result of the disconnecting switch can be determined based on the matching condition between the distance data and corresponding reference distance data. Therefore, according to the disconnecting switch closing process state detection method, the closing condition of the disconnecting switch is observed from the data dimension, and the disconnecting switch closing detection result is determined based on the measured distance data and the corresponding reference distance data, so that automatic disconnecting switch closing process state detection is realized; and the reliability of the closing detection result of the isolating switch is improved.

Description

Technical Field

[0001] The present application relates to the technical field of isolating switch closing process status detection, and in particular to an isolating switch closing process status detection method, device and self-detecting isolating switch. Background Art

[0002] In high-voltage power systems such as 220kV and above, horizontal folding disconnectors are widely used and are often used for closing control of substations. At present, whether the closing process of horizontal folding disconnectors is normal is still judged based on manual observation, which has low reliability. Summary of the invention

[0003] Based on this, it is necessary to provide a method and device for detecting the closing process state of an isolating switch with high reliability and a self-detecting isolating switch.

[0004] In a first aspect, a method for detecting a state of a disconnector closing process is provided, comprising:

[0005] When receiving the closing signal, the laser rangefinder is controlled to rotate from the first bracket to the second bracket; wherein the laser rangefinder is arranged on the first bracket, the first bracket is the bracket where the moving contact porcelain bottle is located, and the second bracket is the bracket where the static contact porcelain bottle is located;

[0006] Acquire distance data collected during the rotation of the laser rangefinder, where the distance data represents the distance between the laser rangefinder and at least one point on the conductive arm;

[0007] Determine the disconnector closing detection result according to the matching between the distance data and the corresponding reference distance data;

[0008] The reference distance data is the actual distance between the laser rangefinder and at least one point on the conductive arm during the normal closing process of the disconnector after receiving the closing signal.

[0009] In one embodiment, the conductive arm includes a first arm and a second arm, the first end of the first arm is rotatably connected to the moving contact porcelain bottle, the second end of the first arm is rotatably connected to the first end of the second arm, and the second end of the second arm is used to contact the static contact porcelain bottle in a closed state; when receiving a closing signal, the step of controlling the laser rangefinder to rotate from the first bracket to the second bracket includes:

[0010] When receiving the closing signal, the laser rangefinder is controlled to rotate to a preset position in the direction from the first bracket to the second bracket within the reference closing time;

[0011] The reference closing time is the time taken for the normal closing process of the disconnector after receiving the closing signal, and the preset position is the position where the first arm and the second arm are connected.

[0012] In one embodiment, the step of calculating the reference distance data includes:

[0013] Obtaining the angle ω(t) between the laser projected by the laser rangefinder and the first bracket at the current time t during the rotation of the laser rangefinder;

[0014] Obtain the angle θ(t) formed by the first arm at the current time t and the first arm in the closed state;

[0015] According to the angle ω(t), the angle θ(t) and the following expression, the reference distance s(t) corresponding to the current time t during the rotation of the laser rangefinder is calculated:

[0016]

[0017] Where H is the height of the first bracket, y p is the height difference between the laser rangefinder and the lowest point of the first bracket.

[0018] In one embodiment, the step of calculating the angle ω(t) comprises:

[0019] When the closing signal is received, the timing is started;

[0020] Calculate the angle ω(t) based on the accumulated timing duration and the following expression:

[0021]

[0022] Where, k is the ratio of the accumulated timing time at time t to the reference closing time, L down is the length of the first arm.

[0023] In one embodiment, the step of determining the disconnector closing detection result according to the matching between the distance data and the corresponding reference distance data includes:

[0024] When the distance data matches the corresponding reference distance data, it is determined that the closing process state of the disconnector is normal.

[0025] In one embodiment, the method further comprises:

[0026] When the closing signal is received, the timing is started;

[0027] According to the matching between the distance data and the corresponding reference distance data, the disconnector closing detection result is determined, including:

[0028] If the accumulated timing time is less than the reference closing time, and the distance data is greater than the corresponding reference distance data, it is determined that the closing process of the disconnector is stuck;

[0029] If the accumulated timing time is less than the reference closing time, and the distance data is less than the corresponding reference distance data, it is determined that the mechanical structure of the disconnector is abnormal;

[0030] If the accumulated timing duration is greater than or equal to the reference closing time, and the distance data is greater than the corresponding reference distance data, it is determined that the disconnector is not closed in place;

[0031] If the accumulated timing duration is greater than or equal to the reference closing time, and the distance data is less than the corresponding reference distance data, it is determined that the disconnector closing overtravel.

[0032] In one embodiment, the method further comprises:

[0033] When it is determined that the isolating switch closing process is stuck, generating and sending a first alarm signal;

[0034] In the case where it is determined that the mechanical structure of the disconnector is abnormal, generating and sending a second alarm signal;

[0035] When it is determined that the isolating switch is not fully closed, generating and sending a third alarm signal;

[0036] When it is determined that the isolating switch has exceeded the closing stroke, a fourth alarm signal is generated and sent.

[0037] In a second aspect, a device for detecting the state of a disconnector closing process is provided, the device comprising:

[0038] A laser rangefinder, which is arranged on the first bracket where the moving contact porcelain bottle of the disconnector is located, and is used to emit laser to the conductive arm of the disconnector;

[0039] A control module is connected to the laser rangefinder, and the control module is used to execute the steps of the above-mentioned isolating switch closing process state detection method.

[0040] In one embodiment, the above device further comprises:

[0041] A locking relay is connected in series between the circuit breaker and the control circuit of the circuit breaker;

[0042] The control module is connected to the locking relay, and is further configured to output a locking signal to the locking relay when receiving the third alarm signal or the fourth alarm signal, so as to drive the locking relay to lock the current state of the circuit breaker.

[0043] In a third aspect, a self-detecting isolating switch is provided, comprising an isolating switch and the above-mentioned isolating switch closing process state detection device.

[0044] The above-mentioned isolating switch closing process state detection method, device and self-detecting isolating switch, when receiving the closing signal, synchronously control the laser rangefinder to rotate from the first bracket to the second bracket, and then obtain the distance data collected by the laser rangefinder during the above-mentioned rotation process, and the isolating switch closing detection result can be determined based on the matching between the distance data and the corresponding reference distance data. Therefore, the isolating switch closing process state detection method observes the closing condition of the isolating switch from the data dimension, and determines the isolating switch closing detection result based on the measured distance data and the corresponding reference distance data, thereby realizing automated isolating switch closing process state detection and improving the reliability of the isolating switch closing detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 An application environment diagram of a method for detecting the state of a disconnector closing process in an embodiment;

[0047] Figure 2 A schematic flow chart of a method for detecting the state of a disconnector closing process in one embodiment;

[0048] Figure 3 A schematic diagram of a closed state of an isolating switch in one embodiment;

[0049] Figure 4 An equivalent diagram for calculating reference distance data in one embodiment;

[0050] Figure 5 It is a structural block diagram of a device for detecting the state of the closing process of an isolating switch in one embodiment;

[0051] Figure 6 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application 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 application and are not used to limit the present application.

[0053] The isolating switch closing process state detection method provided in the embodiment of the present application can be applied to Figure 1In the application environment shown. When the control module (not shown) receives the closing signal, the controller laser rangefinder 102 rotates from the first bracket 104 to the second bracket 106 to measure the distance data; the control module determines the disconnector closing detection result according to the matching between the obtained distance data and the corresponding reference distance data, thereby judging whether the closing process of the disconnector is normal by means of data measurement and data matching. The disconnector includes a first bracket 104, a second bracket 106, a moving contact porcelain bottle 108, a static contact porcelain bottle 110 and a conductive arm 112.

[0054] In an exemplary embodiment, Figure 2 As shown, a method for detecting the state of a disconnector closing process is provided, comprising:

[0055] S202, when receiving the closing signal, control the laser rangefinder to rotate from the first bracket to the second bracket; wherein the laser rangefinder is arranged on the first bracket, the first bracket is the bracket where the moving contact porcelain bottle is located, and the second bracket is the bracket where the static contact porcelain bottle is located.

[0056] S204, obtaining distance data collected during the rotation of the laser rangefinder, where the distance data represents the distance between the laser rangefinder and at least one point on the conductive arm.

[0057] Since the isolating switch responds to the closing signal, it starts to close. Moreover, when receiving the closing signal, the control module controls the laser rangefinder to rotate, so that the rotation action and the distance measurement action of the laser rangefinder are synchronized with the closing action of the isolating switch. Based on this, the isolating switch closing process state detection method can obtain distance data when the laser rangefinder and the isolating switch work synchronously, thereby reducing the error of the distance data and improving the reliability of the distance data.

[0058] S206, determining the disconnector closing detection result according to the matching condition between the distance data and the corresponding reference distance data.

[0059] The reference distance data is the actual distance between the laser rangefinder and at least one point on the conductive arm during the normal closing process of the disconnector after receiving the closing signal.

[0060] The reference distance data may be determined based on data from multiple normal closing processes of the disconnector, for example, the non-reference distance data may be determined by taking an average of the data from multiple normal closing processes of the disconnector.

[0061] During the closing process of the disconnector, the laser rangefinder performs rotation and distance measurement. At different times during the closing process, the position of the disconnector, the rotation angle of the laser rangefinder, and the distance data measured by the laser rangefinder are all different. Therefore, according to the matching relationship between the distance data at different times and the reference distance data of the disconnector at the corresponding time, the action of the disconnector at any time during the closing process can be confirmed. According to the action, the closing detection result of the disconnector can be determined.

[0062] Therefore, the above-mentioned disconnector closing process state detection method, when receiving the closing signal, synchronously controls the laser rangefinder to rotate from the first bracket to the second bracket, and then obtains the distance data collected by the laser rangefinder during the above-mentioned rotation process, and can determine the disconnector closing detection result based on the matching between the distance data and the corresponding reference distance data. Therefore, the disconnector closing process state detection method observes the closing condition of the disconnector from the data dimension, and determines the disconnector closing detection result based on the measured distance data and the corresponding reference distance data, thereby realizing automated disconnector closing process state detection and improving the reliability of the disconnector closing detection result.

[0063] In an exemplary embodiment, Figure 3 As shown, the conductive arm includes a first arm and a second arm, the first end of the first arm is rotatably connected to the moving contact porcelain bottle, the second end of the first arm is rotatably connected to the first end of the second arm, and the second end of the second arm is used to contact the static contact porcelain bottle in the closed state.

[0064] When receiving the closing signal, the laser rangefinder is controlled to rotate from the first bracket to the second bracket, including:

[0065] When a closing signal is received, the laser rangefinder is controlled to rotate to a preset position in a direction from the first bracket to the second bracket within a reference closing time.

[0066] The reference closing time is the time taken for the normal closing process of the disconnector after receiving the closing signal, and the preset position is the position where the first arm and the second arm are connected.

[0067] The distance between the preset position of the disconnector in the closed state and the laser rangefinder is fixed. By controlling the laser rangefinder to rotate to point to the preset position, the distance data obtained can indicate whether the disconnector is in place.

[0068] In an exemplary embodiment, the step of calculating the reference distance data includes:

[0069] Obtain the angle ω(t) between the laser projected by the laser rangefinder and the first bracket at the current time t during the rotation of the laser rangefinder (such as Figure 4 shown).

[0070] Get the angle θ(t) formed by the first arm at the current time t and the first arm in the closed state (such as Figure 4 shown).

[0071] According to the angle ω(t), the angle θ(t) and the following expression, the reference distance s(t) corresponding to the current time t during the rotation of the laser rangefinder is calculated:

[0072]

[0073] Where H is the height of the first bracket, y p is the height difference between the laser rangefinder and the lowest point of the first bracket.

[0074] When the disconnector is in the normal closing process, the calculation step of the reference distance data is performed at multiple moments to determine the reference distance at each moment, thereby providing reliable reference data for the disconnector closing process status detection.

[0075] In an exemplary embodiment, the step of calculating the angle ω(t) includes:

[0076] When the closing signal is received, the timing starts.

[0077] Calculate the angle ω(t) based on the accumulated timing duration and the following expression:

[0078]

[0079] Where, k is the ratio of the accumulated timing time at time t to the reference closing time, L down is the length of the first arm.

[0080] When the disconnector is in the normal closing process, the above angle ω(t) is calculated at multiple times to determine the angle ω(t) at each time, and then ω(t) is substituted into the expression of s(t) to obtain a reliable s(t).

[0081] Specifically, the derivation process of the formula of the reference distance s(t) is as follows:

[0082] like Figure 4 As shown, the end of the first bracket away from the moving contact porcelain bottle is taken as the coordinate origin O, the erection direction of the first bracket is the y-axis, and the direction perpendicular to the y-axis pointing to the second bracket is the x-axis. Figure 4 O1 in the middle moves in a circle, and the second arm moves Figure 4 O2 in the figure moves as the center of a circle, with O1 on the y-axis. According to the manufacturer's information on the isolating switch, we can know the length of the first arm, L down, the length of the second arm is L up , and the bracket height H, T close That is the reference closing time, so there is 0≤t≤T close .

[0083] Take any point A on the first arm, the distance between point A and the axis O1 is L A (0≤L A ≤L down ), during the closing process of the disconnector, the angle θ(t) (0°≤θ≤90°).

[0084] Hence there exists:

[0085]

[0086] Based on this, the coordinates of point A can be expressed as: A[L A cosθ(t),L A sinθ(t)+H]

[0087] Furthermore, the coordinates of point A can be expressed as:

[0088]

[0089] The laser rangefinder is installed at point P, and the coordinates of point P (x p ,y p ), since the laser rangefinder is very small and much smaller than the opening distance of the isolating switch, that is, x p < <L up+ L down , x p ≈0, that is, the coordinates of point P can be regarded as P(0,y p ).

[0090] At the end of closing, the angle ω(t) = ω max , and the specific ω can be determined by the following expression max :

[0091]

[0092] Therefore, during the closing process, according to the geometric relationship, the angle ω(t) can be expressed by the following formula:

[0093]

[0094] During the closing process, points O1, P, and A form a triangle. According to the cosine theorem, we have:

[0095]

[0096]

[0097] After sorting, you can get

[0098]

[0099] In this way, the reference distance corresponding to each moment t during the rotation of the laser rangefinder can be determined.

[0100] When the closing is completed, that is, t≥T close , the upper laser rangefinder rotates to the preset position, at this time, the distance data s should be measured:

[0101]

[0102] According to the distance data s and s(t)(t≥T close ) can be used to determine the closing state of the isolating switch.

[0103] In an exemplary embodiment, the step of determining the disconnector closing detection result according to the matching between the distance data and the corresponding reference distance data includes:

[0104] When the distance data matches the corresponding reference distance data, it is determined that the closing process state of the disconnector is normal.

[0105] Acquire multiple distance data of the laser rangefinder at different times during the rotation process, and compare these distance data with the reference distance data at the corresponding time. When the distance data is within the range defined by a certain value floating up and down with the reference distance data as the center point, it can be considered that the disconnector is in a smooth and normal state at any time during the closing process.

[0106] The above floating value range can be set according to the accuracy requirements in actual applications. The smaller the error required for the disconnector closing detection result, the smaller the corresponding floating value is set.

[0107] In an exemplary embodiment, the method further includes:

[0108] When the closing signal is received, the timing starts.

[0109] According to the matching between the distance data and the corresponding reference distance data, the disconnector closing detection result is determined, including:

[0110] If the accumulated timing duration is less than the reference closing time, and the distance data is greater than the corresponding reference distance data, it is determined that the closing process of the disconnector is stuck.

[0111] If the accumulated timing time is less than the reference closing time, it indicates that the disconnector is still in the closing process. If the distance data detected during the closing process is greater than the corresponding reference distance data, it indicates that the disconnector has an action lag due to insufficient lubrication, electrode aging, etc., which causes the disconnector closing process to be stuck.

[0112] If the accumulated timing duration is less than the reference closing time, and the distance data is less than the corresponding reference distance data, it is determined that the mechanical structure of the disconnector is abnormal.

[0113] If the distance data detected during the closing process is smaller than the corresponding reference distance data, it indicates that the disconnector is operating ahead of schedule due to mechanical distortion, slippage, etc.

[0114] If the accumulated timing duration is greater than or equal to the reference closing time, and the distance data is greater than the corresponding reference distance data, it is determined that the disconnector has not been fully closed.

[0115] If the accumulated timing duration is greater than or equal to the reference closing time, it indicates that the isolating switch has completed closing and is in the closed state. If the distance data detected in the closed state is greater than the corresponding reference distance data, it indicates that the isolating switch is arched in the opening direction, resulting in the isolating switch not being closed properly.

[0116] If the accumulated timing duration is greater than or equal to the reference closing time, and the distance data is less than the corresponding reference distance data, it is determined that the disconnector closing overtravel.

[0117] If the distance data detected in the closed state is smaller than the corresponding reference distance data, it indicates that the disconnector is concave in the closing direction, causing over-closing and resulting in failure of the disconnector to close properly.

[0118] In an exemplary embodiment, the method further includes:

[0119] When it is determined that the closing process of the disconnector is stuck, a first alarm signal is generated and sent.

[0120] The first alarm signal can carry information such as the number of the disconnector, the time of getting stuck, the reference distance data at the time of getting stuck, the distance data at the time of getting stuck, the deviation ratio between the reference distance data at the time of getting stuck and the distance data at the time of getting stuck, so that the staff can judge the time of getting stuck of the disconnector according to the information carried by the first alarm signal, and can carry out targeted inspection and maintenance work.

[0121] When it is determined that the mechanical structure of the disconnector is abnormal, a second alarm signal is generated and sent.

[0122] Corresponding to the first alarm signal, the second alarm signal can carry information such as the number of the isolating switch, the time of mechanical structure abnormality, the reference distance data at the time of mechanical structure abnormality, the distance data at the time of mechanical structure abnormality, the deviation ratio between the reference distance data at the time of mechanical structure abnormality and the distance data at the time of mechanical structure abnormality, so that the staff can judge the time of mechanical structure abnormality of the isolating switch according to the information carried by the second alarm signal, and can carry out targeted inspection and maintenance work.

[0123] When it is determined that the isolating switch is not fully closed, a third alarm signal is generated and sent.

[0124] The third alarm signal can carry information such as the number of the disconnector, distance data for incomplete closing, reference distance data for normal closing status, deviation ratio between the distance data for incomplete closing and the reference distance data for normal closing status, so that the staff can judge the degree of closing deviation of the disconnector according to the information carried by the third alarm signal, and can carry out targeted inspection and maintenance work.

[0125] When it is determined that the isolating switch has exceeded the closing stroke, a fourth alarm signal is generated and sent.

[0126] Corresponding to the third alarm signal, the fourth alarm signal can carry information such as the number of the disconnector, the distance data of the closing overtravel, the reference distance data of the normal closing state, the deviation ratio between the distance data of the closing overtravel and the reference distance data of the normal closing state, so that the staff can judge the degree of closing deviation of the disconnector according to the information carried by the fourth alarm signal, and thus carry out targeted inspection and maintenance work.

[0127] The above-mentioned first alarm signal, second alarm signal, third alarm signal and fourth alarm signal can all alert the staff through sound and light alarm modules, communication modules, display interfaces, etc., so that the staff can perform corresponding inspection and maintenance work in time according to the current alarm signal.

[0128] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0129] Based on the same inventive concept, the embodiment of the present application also provides a disconnector closing process state detection device for implementing the disconnector closing process state detection method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more disconnector closing process state detection device embodiments provided below can refer to the limitations of the disconnector closing process state detection method above, and will not be repeated here.

[0130] In an exemplary embodiment, Figure 5 As shown, a disconnector closing process state detection device 500 is provided, comprising: a laser rangefinder 102 and a control module 502, wherein:

[0131] The laser rangefinder 102 is arranged on the first bracket where the moving contact porcelain bottle of the disconnector is located, and the laser rangefinder is used to emit laser to the conductive arm of the disconnector.

[0132] The control module is connected to the laser rangefinder 102, and the control module 502 is used to execute the steps of the above-mentioned isolating switch closing process state detection method.

[0133] In an exemplary embodiment, the above-mentioned isolating switch closing process state detection device 500 further includes: a locking relay.

[0134] Wherein, the locking relay is connected in series between the circuit breaker and the control circuit of the circuit breaker.

[0135] The control module is connected to the locking relay, and is further configured to output a locking signal to the locking relay when receiving the third alarm signal or the fourth alarm signal, so as to drive the locking relay to lock the current state of the circuit breaker.

[0136] Since the third alarm signal and the fourth alarm signal both indicate that the isolating switch is in an abnormal closing state, if the isolating switch in the abnormal closing state continues to operate the corresponding circuit breaker, it will generate heat and discharge, thus posing a safety hazard. Therefore, by locking the state of the circuit breaker through the locking relay, the circuit breaker can maintain the current state unchanged and no longer respond to the operation of the isolating switch, thereby avoiding the occurrence of safety accidents and improving the safety and reliability of the circuit equipped with the isolating switch closing process state detection device 500.

[0137] Furthermore, when driving the locking relay to work, the control module can also send an alarm signal to the staff to warn the staff that the isolating switch is in an abnormal closing state and needs to be repaired, thereby improving the safety and reliability of the circuit equipped with the isolating switch closing process status detection device 500.

[0138] Each module in the above-mentioned isolating switch closing process state detection device can be implemented in whole or in part by software, hardware and their combination. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0139] In an exemplary embodiment, a self-detecting isolating switch is provided, comprising an isolating switch and the above-mentioned isolating switch closing process state detection device.

[0140] The self-detecting isolating switch equipped with a closing process status detection device for the isolating switch can complete the self-detection of the closing process, thereby ensuring that the self-detecting isolating switch can output a corresponding alarm signal in an abnormal closing state to alert the staff.

[0141] In an exemplary embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as shown in FIG. Figure 6 As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store reference distance data. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for detecting the state of the closing process of an isolating switch is implemented.

[0142] Those skilled in the art will understand that Figure 6 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0143] In an exemplary embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor executes the steps of any one of the above-mentioned methods for detecting the state of the disconnector closing process.

[0144] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of any method of the above-mentioned disconnector closing process state detection method are implemented.

[0145] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the steps of any one of the above-mentioned methods for detecting the state of the disconnector closing process.

[0146] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited thereto. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited thereto.

[0147] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0148] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for detecting the state of a disconnector closing process, characterized in that: include: When receiving the closing signal, the laser rangefinder is controlled to rotate from the first bracket to the second bracket; wherein the laser rangefinder is arranged on the first bracket, the first bracket is the bracket where the moving contact porcelain bottle is located, and the second bracket is the bracket where the static contact porcelain bottle is located; Acquire distance data collected during the rotation of the laser rangefinder, wherein the distance data represents the distance between the laser rangefinder and at least one point on the conductive arm; Determining a disconnector closing detection result according to a match between the distance data and corresponding reference distance data; The reference distance data is the actual distance between the laser rangefinder and at least one point on the conductive arm during the normal closing process of the disconnector after receiving the closing signal.

2. The method according to claim 1, characterized in that The conductive arm comprises a first arm and a second arm, the first end of the first arm is rotatably connected to the moving contact porcelain bottle, the second end of the first arm is rotatably connected to the first end of the second arm, and the second end of the second arm is used to contact the static contact porcelain bottle in a closed state; When receiving the closing signal, controlling the laser rangefinder to rotate from the first bracket to the second bracket includes: When receiving the closing signal, controlling the laser rangefinder to rotate to a preset position along the direction of the first bracket toward the second bracket within a reference closing time; The reference closing time is the time taken for the disconnector to undergo a normal closing process after receiving a closing signal, and the preset position is the position where the first arm and the second arm are connected.

3. The method according to claim 2, characterized in that The step of calculating the reference distance data comprises: Acquire the angle ω(t) between the laser projected by the laser rangefinder and the first bracket at the current time t during the rotation of the laser rangefinder; Obtaining an angle θ(t) formed by the first arm at the current time t and the first arm in the closed state; According to the angle ω(t), the angle θ(t) and the following expression, the reference distance s(t) corresponding to the current time t during the rotation of the laser rangefinder is calculated: Wherein, H is the height of the first bracket, y p is the height difference between the laser rangefinder and the lowest point of the first bracket.

4. The method according to claim 3, characterized in that The calculation steps of the angle ω(t) include: When the closing signal is received, starting the timing; Calculate the angle ω(t) based on the accumulated timing duration and the following expression: Wherein, k is the ratio of the accumulated timing duration at time t to the reference closing time, L down is the length of the first arm.

5. The method according to any one of claims 1 to 4, characterized in that: The step of determining the disconnector closing detection result according to a matching condition between the distance data and the corresponding reference distance data comprises: When the distance data matches the corresponding reference distance data, it is determined that the closing process state of the disconnector is normal.

6. The method according to any one of claims 1 to 4, characterized in that: The method further comprises: When the closing signal is received, starting the timing; The step of determining the disconnector closing detection result according to a matching condition between the distance data and the corresponding reference distance data comprises: If the accumulated timing duration is less than the reference closing time, and the distance data is greater than the corresponding reference distance data, it is determined that the closing process of the disconnector is stuck; If the accumulated timing duration is less than the reference closing time, and the distance data is less than the corresponding reference distance data, it is determined that the mechanical structure of the disconnector is abnormal; If the accumulated timing duration is greater than or equal to the reference closing time, and the distance data is greater than the corresponding reference distance data, it is determined that the disconnector is not closed properly; If the accumulated timing duration is greater than or equal to the reference closing time, and the distance data is less than the corresponding reference distance data, it is determined that the disconnector closing overtravel has occurred.

7. The method according to any one of claim 6, characterized in that: The method further comprises: When it is determined that the closing process of the isolating switch is stuck, generating and sending a first alarm signal; In the case where it is determined that the mechanical structure of the isolating switch is abnormal, generating and sending a second alarm signal; When it is determined that the isolating switch is not fully closed, generating and sending a third alarm signal; When it is determined that the isolating switch has exceeded the closing stroke, a fourth alarm signal is generated and sent.

8. A device for detecting the state of a disconnector during closing process, characterized in that: The device comprises: A laser rangefinder, which is arranged on the first bracket where the moving contact porcelain bottle of the disconnector is located, and is used to emit laser to the conductive arm of the disconnector; A control module, wherein the control module is connected to the laser rangefinder, and the control module is used to execute the steps of the disconnector closing process state detection method described in any one of claims 1 to 7.

9. The isolating switch closing process state detection device according to claim 8, characterized in that: Also includes: A locking relay, the locking relay being connected in series between the circuit breaker and a control circuit of the circuit breaker; The control module is connected to the locking relay, and is further configured to output a locking signal to the locking relay upon receiving a third alarm signal or a fourth alarm signal, so as to drive the locking relay to lock the current state of the circuit breaker.

10. A self-detecting isolating switch, characterized in that: It comprises an isolating switch and a closing process state detection device for the isolating switch according to any one of claims 8 to 9.

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