Isolator closing process state detection method and device and self-detection isolator

Abstract

The application relates to a disconnecting switch closing process state detection method and device and a self-detecting disconnecting switch. The method synchronously controls a laser range finder to rotate from a first support to a second support upon receiving a closing signal, then acquires distance data collected by the laser range finder during the rotation, and can determine a disconnecting switch closing detection result based on matching between the distance data and corresponding reference distance data. Therefore, the disconnecting switch closing process state detection method observes the closing condition of the disconnecting switch from the data dimension, and determines the disconnecting switch closing detection result 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 disconnecting switch closing detection result is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of isolator closing process state detection, in particular to an isolator closing process state detection method, device and self-detecting isolator. BACKGROUND

[0002] In high-voltage power systems such as 220kV and above, horizontal folding isolators are widely used, and are often used for closing control in substations. At present, whether the closing process of the horizontal folding isolator is normal is still observed and judged manually, and the reliability is low. SUMMARY

[0003] Therefore, it is necessary to provide an isolator closing process state detection method, device and self-detecting isolator with high reliability.

[0004] In a first aspect, an isolator closing process state detection method is provided, comprising:

[0005] When the closing signal is received, the laser range finder is controlled to rotate from the first support to the direction of the second support; wherein the laser range finder is arranged on the first support, the first support is a support where the moving contact porcelain bottle is located, and the second support is a support where the static contact porcelain bottle is located;

[0006] Distance data collected in the rotating process of the laser range finder is acquired, and the distance data represents the distance between the laser range finder and at least one point on the conductive arm;

[0007] According to the matching condition between the distance data and the corresponding reference distance data, the isolator closing detection result is determined;

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

[0009] In one of the embodiments, the conductive arm includes a first arm and a second arm, the first end of the first arm is rotatably connected with the moving contact porcelain bottle, the second end of the first arm is rotatably connected with 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 closing state; when the closing signal is received, the step of controlling the laser range finder to rotate from the first support to the direction of the second support includes:

[0010] When the closing signal is received, the laser range finder is controlled to rotate to a preset position along the first support to the direction of the second support within a reference closing time;

[0011] The reference closing time is the time consumed in the normal closing process of the isolator 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 of the embodiments, the step of calculating the reference distance data comprises:

[0013] obtaining an angle ω(t) between the laser emitted by the laser range finder at the current time t and the first support during the rotation of the laser range finder;

[0014] obtaining an angle θ(t) between the first arm and the first arm formed at the closing state at the current time t;

[0015] calculating the reference distance s(t) corresponding to the current time t during the rotation of the laser range finder according to the angle ω(t), the angle θ(t) and the following expression:

[0016]

[0017] wherein H is the height of the first support, y p is the height difference between the laser range finder and the lowest point of the first support.

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

[0019] starting the timing when the closing signal is received;

[0020] calculating the angle ω(t) according to the accumulated timing duration and the following expression:

[0021]

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

[0023] In one of the embodiments, the step of determining the closing detection result of the disconnecting switch according to the matching between the distance data and the corresponding reference distance data comprises:

[0024] determining that the closing process of the disconnecting switch is normal in the case that the distance data matches the corresponding reference distance data.

[0025] In one of the embodiments, the above method further comprises:

[0026] starting the timing when the closing signal is received;

[0027] determining the closing detection result of the disconnecting switch according to the matching between the distance data and the corresponding reference distance data, comprising:

[0028] determining that the closing process of the disconnecting switch is stuck in the case that the accumulated timing duration is less than the reference closing time and the distance data is greater than the corresponding reference distance data.

[0029] If the accumulated time 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;

[0030] If the accumulated time 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 closing is not in place.

[0031] If the accumulated time 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 is overstroke.

[0032] In one of the embodiments, the above method further comprises:

[0033] In the case of determining that the disconnector closing process is stuck, a first alarm signal is generated and sent;

[0034] In the case of determining that the mechanical structure of the disconnector is abnormal, a second alarm signal is generated and sent;

[0035] In the case of determining that the disconnector closing is not in place, a third alarm signal is generated and sent;

[0036] In the case of determining that the disconnector closing is overstroke, a fourth alarm signal is generated and sent.

[0037] In a second aspect, a disconnector closing process state detection device is provided, which comprises:

[0038] A laser range finder, which is arranged on a first support 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, which is connected to the laser range finder, and is used to execute the steps of the above disconnector closing process state detection method.

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

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

[0042] The control module is connected to the lockout relay, and is further used to output a lockout signal to the lockout relay to drive the lockout relay to lock the current state of the circuit breaker in the case of receiving the third alarm signal or the fourth alarm signal.

[0043] In a third aspect, a self-detecting disconnector is provided, which comprises a disconnector and the above disconnector closing process state detection device.

[0044] The isolation switch closing process state detection method, device and self-detection isolation switch provided by the above method can determine the isolation switch closing detection result based on the matching between the distance data and the corresponding reference distance data. Therefore, the isolation switch closing process state detection method observes the closing condition of the isolation switch from the data dimension, and determines the isolation switch closing detection result based on the measured distance data and the corresponding reference distance data, so as to realize the automatic isolation switch closing process state detection and improve the reliability of the isolation switch closing detection result. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed to be used in the description of the embodiments of the present application or the related art will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other related drawings can be obtained by those skilled in the art without creative labor.

[0046] Figure 1 An application environment diagram of the isolation switch closing process state detection method in an embodiment;

[0047] Figure 2 A flowchart of the isolation switch closing process state detection method in an embodiment;

[0048] Figure 3 A closing state diagram of the isolation switch in an embodiment;

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

[0050] Figure 5 A structural block diagram of the isolation switch closing process state detection device in an embodiment;

[0051] Figure 6 An internal structure diagram of the computer device in an embodiment. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0053] The isolation switch closing process state detection method provided by the embodiments of the present application can be applied to, for example Figure 1The application environment shown. The control module (not shown) receives the closing signal, the controller controls the laser range finder 102 to rotate from the first support 104 to the direction of the second support 106 to measure the distance data; the control module determines the disconnecting switch closing detection result according to the matching between the obtained distance data and the corresponding reference distance data, so as to judge whether the closing process of the disconnecting switch is normal in the way of data measurement and data matching. Wherein, the disconnecting switch includes the first support 104, the second support 106, the moving contact porcelain bottle 108, the static contact porcelain bottle 110 and the conductive arm 112.

[0054] In an exemplary embodiment, as shown, a disconnecting switch closing process state detection method is provided, comprising: Figure 2

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

[0056] S204, obtaining the distance data collected in the rotating process of the laser range finder, the distance data representing the distance between the laser range finder and at least one point on the conductive arm.

[0057] Since the disconnecting switch responds to the closing signal and starts closing. Also, when receiving the closing signal, the control module controls the laser range finder to rotate, so that the rotating action and the ranging action of the laser range finder are synchronized with the closing action of the disconnecting switch. Based on this, the disconnecting switch closing process state detection method can obtain distance data under the condition that the laser range finder and the disconnecting switch work synchronously, thereby reducing the error of the distance data and improving the reliability of the distance data.

[0058] S206, according to the matching between the distance data and the corresponding reference distance data, determine the disconnecting switch closing detection result.

[0059] Wherein, the reference distance data is the actual distance between the laser range finder and at least one point on the conductive arm in the normal closing process of the disconnecting switch after receiving the closing signal.

[0060] The reference distance data can be determined based on the data in the multiple normal closing processes of the disconnecting switch, such as determining the reference distance data by taking the average of the data in the multiple normal closing processes of the disconnecting switch.

[0061] ​In the closing process of the disconnecting switch, the laser range finder performs rotating action and distance measurement action. At different time points in the closing process, the position of the disconnecting switch, the rotating angle of the laser range finder, and the distance data measured by the laser range finder are all different. Therefore, according to the matching relationship between the distance data at different time points and the reference distance data of the disconnecting switch at the corresponding time points, the action condition of the disconnecting switch at any time point in the closing process can be determined. According to the action condition, the closing detection result of the disconnecting switch can be determined.

[0062] Therefore, the disconnecting switch closing process state detection method can determine the closing detection result of the disconnecting switch by synchronously controlling the laser range finder to rotate from the first support to the second support when the closing signal is received, then acquiring the distance data collected by the laser range finder in the above rotating process, and determining the closing detection result of the disconnecting switch based on the matching condition between the distance data and the corresponding reference distance data. Therefore, the disconnecting switch closing process state detection method observes the closing condition of the disconnecting switch from the data dimension, and determines the closing detection result of the disconnecting switch based on the measured distance data and the corresponding reference distance data, thereby realizing automatic detection of the closing process state of the disconnecting switch and improving the reliability of the closing detection result of the disconnecting switch.

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

[0064] When the closing signal is received, the laser range finder is controlled to rotate from the first support to the second support, including:

[0065] When the closing signal is received, the laser range finder is controlled to rotate to a preset position along the first support to the second support within a reference closing time.

[0066] The reference closing time is the time consumed by the normal closing process of the disconnecting switch after receiving the closing signal. 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 disconnecting switch in the closed state and the laser range finder is fixed. By controlling the laser range finder to rotate to the position pointing to the preset position, the distance data obtained can represent whether the disconnecting switch is closed in place.

[0068] In one exemplary embodiment, the calculation step of the above reference distance data includes:

[0069] The angle ω(t) between the laser projected by the laser range finder at the current time t and the first support in the rotating process of the laser range finder is acquired (as shown inFigure 4 (As shown).

[0070] Obtain the angle θ(t) formed by the first arm at the current time t and the first arm in the closed state (e.g., Figure 4 (As shown).

[0071] Based on the included angles ω(t), θ(t), and the following expression, calculate the reference distance s(t) corresponding to the current time t during the rotation of the laser rangefinder:

[0072]

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

[0074] During the normal closing process of the disconnecting switch, the above-mentioned reference distance data calculation steps are performed at multiple times to determine the reference distance at each time, thereby providing reliable reference data for the status detection of the disconnecting switch closing process.

[0075] In an exemplary embodiment, the steps for calculating the included angle ω(t) include:

[0076] The timer starts when the closing signal is received.

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

[0078]

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

[0080] During the normal closing process of the disconnecting switch, the aforementioned included angle ω(t) is calculated at multiple moments to determine the included angle ω(t) at each moment. Then, ω(t) is substituted into the expression of s(t) to obtain a reliable s(t).

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

[0082] like Figure 4 As shown, the origin O of the coordinate system is the end of the porcelain insulator furthest from the moving contact in the first support. The direction along which the first support is erected is the y-axis, and the direction perpendicular to the y-axis pointing to the second support is the x-axis. The first arm is... Figure 4 O1 in the middle makes a circular motion, and the second arm moves in a circular motion. Figure 4 O2 in the circuit moves in a circle, with O1 positioned on the y-axis. The length L of the first arm can be determined from the disconnector manufacturer's specifications. down, the length L of the second arm up , and the height H of the support close , i.e. the reference closing time, so there is 0≤t≤T close .

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

[0084] Therefore, there is:

[0085]

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

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

[0088]

[0089] The laser range finder is installed at P, and the coordinates of P are P(x p ,y p ). Since the laser range finder is very small and much smaller than the opening distance of the disconnector, i.e. x p <<L up+ L down , x p ≈0, the coordinates of P can be considered as P(0,y p ).

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

[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, O1, P, and A form a triangle, according to the cosine law, we have:

[0095]

[0096]

[0097] After the arrangement, the distance data s(t) can be obtained

[0098]

[0099] Thus, the reference distance corresponding to each time t during the rotation of the laser range finder can be determined.

[0100] When the closing is finished, i.e. t≥T close , the laser range finder is rotated to the preset position, at this time, the distance data s should be measured:

[0101]

[0102] According to the size relationship between the distance data s and s(t) (t≥T close ), the closing state of the disconnecting switch can be determined.

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

[0104] In the case that the distance data matches the corresponding reference distance data, it is determined that the closing process state of the disconnecting switch is normal.

[0105] The distance data of the laser range finder at different times during the rotation is obtained, and these distance data is compared with the reference distance data at the corresponding time. When the distance data is within a range that is centered on the reference distance data and has a certain floating value, it can be considered that the disconnecting switch is in a smooth normal state at any time during the closing process.

[0106] The floating value range can be set according to the accuracy requirement in actual application. The smaller the error requirement for the closing detection result of the disconnecting switch, the smaller the floating value set.

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

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

[0109] According to the matching condition between the distance data and the corresponding reference distance data, the closing detection result of the disconnecting switch is determined, comprising:

[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 disconnecting switch is stuck.

[0111] If the accumulated time length is less than the reference closing time, and the distance data is greater than the corresponding reference distance data, it is determined that the mechanical structure of the disconnector is abnormal.

[0112] If the accumulated time length 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 in the closing process is less than the corresponding reference distance data, it indicates that the disconnector moves ahead due to reasons such as mechanical distortion, sliding, etc.

[0114] If the accumulated time length 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 closing is not in place.

[0115] The accumulated time length greater than or equal to the reference closing time indicates that the disconnector has completed closing at this time and is in a closed state. If the distance data detected in the closed state is greater than the corresponding reference distance data, it indicates that the disconnector is arched towards the opening direction, resulting in the disconnector closing not in place.

[0116] If the accumulated time length 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 is overstroke.

[0117] If the distance data detected in the closed state is less than the corresponding reference distance data, it indicates that the disconnector is concave towards the closing direction, causing excessive closing, resulting in the disconnector closing not in place.

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

[0119] In the case of determining that the disconnector closing process 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 stuck time, the reference distance data at the stuck time, the distance data at the stuck time, the deviation ratio of the reference distance data at the stuck time and the distance data at the stuck time, so that the staff can determine the stuck time of the disconnector according to the information carried by the first alarm signal, and can carry out targeted inspection and maintenance work.

[0121] In the case of determining 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 mechanical structure abnormal time, the reference distance data of the mechanical structure abnormal time, the distance data of the mechanical structure abnormal time, the deviation ratio of the reference distance data of the mechanical structure abnormal time and the distance data of the mechanical structure abnormal time, so that the staff can determine the mechanical structure abnormal time of the isolating switch according to the information carried by the second alarm signal, and thus can carry out targeted inspection and maintenance work.

[0123] In the case where it is determined that the isolating switch is not in place after closing, a third alarm signal is generated and sent.

[0124] The third alarm signal can carry information such as the number of the isolating switch, the distance data of the closing deviation, the reference distance data of the normal closing state, and the deviation ratio of the distance data of the closing deviation and the reference distance data of the normal closing state, so that the staff can determine the closing deviation degree of the isolating switch according to the information carried by the third alarm signal, and thus can carry out targeted inspection and maintenance work.

[0125] In the case where it is determined that the isolating switch is over-travel after closing, 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 isolating switch, the distance data of the closing over-travel, the reference distance data of the normal closing state, and the deviation ratio of the distance data of the closing over-travel and the reference distance data of the normal closing state, so that the staff can determine the closing deviation degree of the isolating switch according to the information carried by the fourth alarm signal, and thus can carry out targeted inspection and maintenance work.

[0127] The first alarm signal, the second alarm signal, the third alarm signal and the fourth alarm signal can all alert the staff through a sound and light alarm module, a communication module, a display interface, etc., so that the staff can timely perform corresponding inspection and maintenance work according to the current alarm signal.

[0128] It should be understood that although each step in the flowchart involved in each of the above-described embodiments is displayed in sequence according to the arrow, these steps are not necessarily executed in sequence according to the arrow. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and these steps can be executed in other sequences. Moreover, at least part of the steps in the flowchart involved in each of the above-described embodiments can include multiple steps or stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence of these steps or stages is not necessarily sequential, but can be executed in rotation or alternation with at least part of other steps or steps or stages in other steps.

[0129] Based on the same inventive concept, the embodiments of the present application also provide a disconnecting switch closing process state detection device for implementing the disconnecting switch closing process state detection method described above. The device provides a solution to the problem similar to the implementation described in the above method, so the specific limitations in one or more disconnecting switch closing process state detection device embodiments provided below can refer to the limitations of the disconnecting switch closing process state detection method described above, which will not be described here.

[0130] In one exemplary embodiment, as shown in Figure 5 A disconnecting switch closing process state detection device 500 is provided, comprising: a laser range finder 102 and a control module 502, wherein:

[0131] The laser range finder 102 is arranged on a first support where the moving contact porcelain bottle of the disconnecting switch is located, and the laser range finder is used to emit laser to the conductive arm of the disconnecting switch.

[0132] The control module is connected to the laser range finder 102, and the control module 502 is used to execute the steps of the disconnecting switch closing process state detection method described above.

[0133] In one exemplary embodiment, the disconnecting switch closing process state detection device 500 described above further comprises: a lockout relay.

[0134] The lockout 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 lockout relay, and the control module is further used to output a lockout signal to the lockout relay to drive the lockout relay to lock the current state of the circuit breaker in the case of receiving the third alarm signal or the fourth alarm signal.

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

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

[0138] The modules in the disconnector closing process state detection device can be implemented by software, hardware, or a combination thereof. The modules can be embedded in or independent of a processor in a computer device in hardware form, or stored in a memory in the computer device in software form, so that the processor can call and execute the operations corresponding to the modules.

[0139] In an exemplary embodiment, a self-detection disconnector is provided, including a disconnector and the disconnector closing process state detection device.

[0140] The self-detection disconnector with the disconnector closing process state detection device can complete self-detection of the closing process, thereby ensuring that the self-detection disconnector 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, which can be a server, and an internal structure diagram of the computer device can be as shown in Figure 6 The computer device includes a processor, a memory, an input / output interface (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 configured 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 operating system and the computer program in the non-volatile storage medium to run. The database of the computer device is configured to store reference distance data. The input / output interface of the computer device is configured to exchange information between the processor and external devices. The communication interface of the computer device is configured to communicate with a terminal through a network connection. The computer program is executed by the processor to implement a disconnector closing process state detection method.

[0142] Those skilled in the art can understand that Figure 6 the structure shown in the figure is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the computer device to which the scheme of the present application is applied. A specific computer device can 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. The memory stores a computer program, and the processor executes the steps of any of the disconnector closing process state detection methods.

[0144] In one embodiment, a computer readable storage medium is provided, having stored thereon a computer program which, when executed by a processor, implements the steps of any of the above-mentioned isolation switch closing process state detection methods.

[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 of the above-mentioned isolation switch closing process state detection methods.

[0146] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiments can be completed by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer readable storage medium and can include the processes of the above-mentioned embodiments when executed. Any reference to a memory, database or other medium used in the embodiments provided by the present application can include at least one of a non-volatile memory and a volatile memory. The non-volatile memory can include a read-only memory (ROM), a magnetic tape, a floppy disk, a flash memory, an optical memory, a high-density embedded non-volatile memory, a resistive random access memory (ReRAM), a magnetoresistive random access memory (MRAM), a ferroelectric random access memory (FRAM), a phase change memory (PCM), a graphene memory, etc. The volatile memory can include a random access memory (RAM) or an external cache memory, etc. As an illustration but not limitation, the RAM can be in various forms, such as a static random access memory (SRAM) or a dynamic random access memory (DRAM), etc. The database involved in the embodiments provided by the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in the embodiments provided by the present application can be a general processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., without being limited thereto.

[0147] Any technical features in the above embodiments can be combined, and for the sake of brevity, not all possible combinations are described above, however, any combination of these technical features is deemed to be within the scope of the present application.

[0148] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, several modifications 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 should be subject to the appended claims.

Claims

1. A method for detecting the status of a closing process of a disconnector, characterized in that, The method comprises: controlling the laser range finder to rotate from the first support to the second support when a closing signal is received; wherein the laser range finder is arranged on the first support, the first support is a support where the movable contact porcelain bottle is located, and the second support is a support where the static contact porcelain bottle is located; acquiring distance data collected during rotation of the laser range finder, the distance data representing a distance between the laser range finder and at least one point on the conducting arm; determining a closing detection result of the disconnecting switch according to matching between the distance data and corresponding reference distance data; wherein the reference distance data is an actual distance between the laser range finder and at least one point on the conducting arm during normal closing of the disconnecting switch after the closing signal is received; wherein the conducting arm comprises a first arm and a second arm, a first end of the first arm is rotatably connected to the movable contact porcelain bottle, a second end of the first arm is rotatably connected to a first end of the second arm, and a second end of the second arm is used to contact the static contact porcelain bottle in a closing state; the step of controlling the laser range finder to rotate from the first support to the second support when the closing signal is received comprises: controlling the laser range finder to rotate to a preset position along the first support to the second support within a reference closing time after the closing signal is received; wherein the reference closing time is a time consumed by normal closing of the disconnecting switch after the closing signal is received, and the preset position is a position where the first arm and the second arm are connected; wherein the calculation step of the reference distance data comprises: acquiring an included angle ω(t) between laser projected by the laser range finder and the first support at a current time t during rotation of the laser range finder; acquiring an included angle θ(t) between the first arm and the first arm in the closing state at the current time t; calculating a reference distance s(t) corresponding to the current time t during rotation of the laser range finder according to the included angle ω(t), the included angle θ(t), and the following expression: where H is the height of the first bracket, y p is the height difference between the laser range finder and the lowest point of the first bracket.

2. The method of claim 1, wherein, the calculation step of the included angle ω(t) comprises: starting timing when the closing signal is received; calculating the included angle ω(t) according to the accumulated timing duration and the following expression: wherein k is the ratio of the accumulated timing duration at the time t to the reference closing time, L down is the length of the first arm.

3. The method according to any one of claims 1-2, characterized in that, the step of determining the closing detection result of the disconnecting switch according to matching between the distance data and the corresponding reference distance data comprises: in the case that the distance data matches the corresponding reference distance data, determining that a closing process state of the disconnecting switch is normal.

4. The method according to any one of claims 1-2, characterized in that, The method further comprises: starting timing when the closing signal is received; the step of determining the closing detection result of the disconnecting switch according to matching 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, determining that the disconnecting switch has a closing process with card stagnation; if the accumulated timing duration is less than the reference closing time, and the distance data is less than the corresponding reference distance data, determining that a mechanical structure of the disconnecting switch is abnormal. if the accumulated time length 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 closing of the disconnector is not in place; if the accumulated time length 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 closing of the disconnector is overstroke.

5. The method of claim 4, wherein, The method further comprises: generating and sending a first alarm signal in the case of determining that the closing process of the disconnector is stuck; generating and sending a second alarm signal in the case of determining that the mechanical structure of the disconnector is abnormal; generating and sending a third alarm signal in the case of determining that the closing of the disconnector is not in place; generating and sending a fourth alarm signal in the case of determining that the closing of the disconnector is overstroke.

6. A device for detecting the status of a disconnector switch during closing, characterized in that, The device comprises: a laser range finder, which is arranged on a first support where the porcelain bottle of the moving contact of the disconnector is located, and is used to emit laser to the conductive arm of the disconnector; a control module, which is connected to the laser range finder, and is used to execute the steps of the disconnector closing process state detection method according to any one of claims 1-5.

7. The isolating switch closing process state detection device according to claim 6, characterized by Further comprising: a lockout relay, which is connected in series between the circuit breaker and the control circuit of the circuit breaker; the control module is connected to the lockout relay, and is further used to output a lockout signal to the lockout relay to drive the lockout relay to lock the current state of the circuit breaker in the case of receiving the third alarm signal or the fourth alarm signal.

8. A self-detecting disconnector, characterized by The device comprises a disconnector and the disconnector closing process state detection device according to any one of claims 6-7.

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