A power supply system for a four-column low-voltage disconnector and its working method

Abstract

The present invention discloses a power supply system for a four-column low-voltage disconnect switch and its working method. Through the switching of the four-column low-voltage disconnect switch, it is possible to achieve power-off maintenance on the user side, and the working state of the four-column low-voltage disconnect switch can be identified to control the opening of the distribution box door, so as to force the staff to perform power-off maintenance operations and power-off operations on the distribution box, and only then can the distribution box be maintained.

Description

Technical Field

[0001] The present invention relates to the field of power supply, and particularly to a power supply system for a four-column type low-voltage disconnector and its working method. Background Art

[0002] In recent years, there have been more and more complaints and reports caused by power outages in power supply transformer substations, especially in rural pole-mounted transformer distribution substations. Most of the power outages in substations are mainly due to the maintenance of distribution boxes. In case of complex situations, power outages often last for several hours. Since the distribution box of the substation is located at the forefront of the customer's power consumption side (at the transformer outlet), every time maintenance is carried out, the entire substation where it is located will be powered off, seriously affecting the customer's growing demand for better power consumption.

[0003] The existing power supply method for substations is that the transformer supplies power to the distribution box, and then the distribution box supplies power to the customers. Therefore, when maintaining the distribution box, the entire substation needs to be powered off, and there is also the unsafe problem that workers perform live operations in order not to cut off the power for maintenance. Summary of the Invention

[0004] The purpose of the present application is to provide a power supply system for a four-column type low-voltage disconnector and its working method, which solves the problems in the prior art that the entire substation needs to be powered off during maintenance and the unsafe problem of live operations caused by workers in order not to cut off the power.

[0005] The present invention is achieved by the following technical solutions:

[0006] A power supply system for a four-column type low-voltage disconnector includes a four-column type low-voltage disconnector, a distribution box, a transformer, an electromagnetic lock, a data acquisition device, and a server;

[0007] When the first normally closed switch between the first insulating column and the second insulating column on the four-column type low-voltage disconnector is closed, the normally open switch between the second insulating column and the third insulating column is open, and the second normally closed switch between the third insulating column and the fourth insulating column is closed, the four-column type low-voltage disconnector connects the transformer to the distribution box and connects the distribution box to the user side; when the normally open switch between the second insulating column and the third insulating column on the four-column type low-voltage disconnector is closed, the first normally closed switch between the first insulating column and the second insulating column is open, and the second normally closed switch between the third insulating column and the fourth insulating column is open, the four-column type low-voltage disconnector connects the transformer to the user side; the electromagnetic lock is arranged on the box door of the distribution box, and both the electromagnetic lock and the data acquisition device are electrically connected to the server, and the data acquisition device is used to collect image data of the four-column type low-voltage disconnector.

[0008] Furthermore, the four-column low-voltage disconnect switch includes a mounting base, a first insulating post, a second insulating post, a third insulating post, a fourth insulating post, a first normally-closed knife switch, a normally-open knife switch, and a second normally-closed knife switch;

[0009] The first insulating post, the second insulating post, the third insulating post, and the fourth insulating post are evenly arranged on the mounting base. Metal connection lugs are provided at the ends of the first insulating post, the second insulating post, the third insulating post, and the fourth insulating post that are far from the mounting base. The metal connection lug of the first insulating post is connected to the incoming line end of the distribution box. The outgoing line end of the distribution box is connected to the metal connection lug of the fourth insulating post. The metal connection lug of the second insulating post is connected to the outgoing line end of the transformer. The incoming line end of the user side is connected to the metal connection lug of the third insulating post;

[0010] One end of the first normally-closed knife switch and one end of the normally-open knife switch are both hinged to the metal connection lug of the second insulating post. One end of the second normally-closed knife switch is hinged to the fourth insulating post;

[0011] When the first normally-closed knife switch is closed, the other end of the first normally-closed knife switch is connected to the metal connection lug of the first insulating post; when the normally-open knife switch is closed, the other end of the normally-open knife switch is connected to the metal connection lug of the third insulating post; when the second normally-closed knife switch is closed, the other end of the second normally-closed knife switch is connected to the metal connection lug of the third insulating post.

[0012] Furthermore, the four-column low-voltage disconnect switch further includes a first limit block, a second limit block, and an I-shaped limit device;

[0013] The first limit block is arranged on the first normally-closed knife switch, and the second limit block is arranged on the normally-open knife switch; when the first normally-closed knife switch is closed and the normally-open knife switch is open, the second limit block limits the first limit block so that the first normally-closed knife switch cannot rotate;

[0014] When the first normally-closed knife switch is open and the normally-open knife switch is closed, the first limit block limits the second limit block so that the normally-open knife switch cannot rotate;

[0015] The I-shaped limit device includes a first arm, a second arm, a third arm, a fourth arm, and a connecting rod. The first arm and the second arm are symmetrically arranged at one end of the connecting rod, and the third arm and the fourth arm are symmetrically arranged at the other end of the connecting rod. The angles between the first arm, the second arm, the third arm, the fourth arm and the connecting rod are all acute angles;

[0016] The middle part of the upper connecting rod of the I-shaped limiting device is rotationally connected to the metal terminal ear of the third insulating support in a damped manner; the first arm and the third arm are located on the side close to the normally open disconnecting switch, and the second arm and the fourth arm are located on the side close to the second normally closed disconnecting switch;

[0017] When the normally open disconnecting switch is closed, the normally open disconnecting switch is located in the cavity formed by the connecting rod, the first arm and the third arm, and the normally open disconnecting switch is limited by the third arm;

[0018] When the second normally closed disconnecting switch is closed, the second normally closed disconnecting switch is located in the cavity formed by the connecting rod, the second arm and the fourth arm, and the second normally closed disconnecting switch is limited by the fourth arm.

[0019] Further, the data acquisition device is an image acquisition device.

[0020] In a second aspect, an operating method of a power supply system of a four-column type low-voltage disconnecting switch provided by an embodiment of the present application includes:

[0021] Obtain real-time image data of the four-column type low-voltage disconnecting switch;

[0022] Identify the real-time image data to obtain the operating state of the four-column type low-voltage disconnecting switch, where the operating state includes a normal power supply state or a maintenance state, the normal power supply state indicates that the first normally closed disconnecting switch is closed, the normally open disconnecting switch is open, and the second normally closed disconnecting switch is closed, and the maintenance state indicates that the normally open disconnecting switch is closed, the first normally closed disconnecting switch is open, and the second normally closed disconnecting switch is open;

[0023] Control the electromagnetic lock according to the operating state of the four-column type low-voltage disconnecting switch.

[0024] Further, identifying the real-time image data to obtain the operating state of the four-column type low-voltage disconnecting switch includes:

[0025] Obtain training data and construct an operating state recognition model;

[0026] Train the operating state recognition model according to the training data to obtain a trained operating state recognition model;

[0027] Use the real-time image data as the input of the trained operating state recognition model to obtain the operating state of the four-column type low-voltage disconnecting switch.

[0028] Further, the training data is pre-stored data, and the training data includes training image data corresponding to the four-column type low-voltage disconnecting switch and operating states.

[0029] Further, the operating state recognition model is a neural network model.

[0030] Further, train the working state recognition model according to the training data to obtain the trained working state recognition model, including:

[0031] Use the training image data as the input of the working state recognition model, and use the working state as the expected output of the working state recognition model to train the working state recognition model to obtain the trained working state recognition model.

[0032] Further, control the electromagnetic lock according to the working state of the four-column low-voltage disconnector, including:

[0033] Judge whether the working state of the four-column low-voltage disconnector is the maintenance state. If so, open the electromagnetic lock; otherwise, do not open the electromagnetic lock.

[0034] The power supply system and its working method of a four-column low-voltage disconnector provided by this application can achieve the power-off-free maintenance on the user side through the switching of the four-column low-voltage disconnector, and can identify the working state of the four-column low-voltage disconnector to control the opening of the distribution box door, so as to force the staff to perform power-off-free maintenance operations and power-off operations on the distribution box, and only then can the maintenance of the distribution box be carried out. Brief Description of the Drawings

[0035] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts. In the drawings:

[0036] Figure 1 It is a schematic structural diagram of a power supply system of a four-column low-voltage disconnector provided by an embodiment of this application.

[0037] Figure 2 It is a schematic diagram of the normal power supply state of a four-column low-voltage disconnector provided by an embodiment of this application.

[0038] Figure 3 It is a schematic diagram of the maintenance state of a four-column low-voltage disconnector provided by an embodiment of this application.

[0039] Figure 4 It is a flowchart of the working method of a power supply system of a four-column low-voltage disconnector provided by an embodiment of this application.

[0040] Labels in the drawings and corresponding component names:

[0041] 1 - Mounting base, 2 - First insulating pillar, 3 - Second insulating pillar, 4 - Third insulating pillar, 5 - Fourth insulating pillar, 6 - First normally closed knife switch, 7 - First limit block, 8 - Normally open knife switch, 9 - Second limit block, 10 - Second normally closed knife switch, 11 - I-shaped limiting device, 12 - Distribution box, 13 - Transformer, 14 - Electromagnetic lock, 15 - Data acquisition device, 16 - Server, 17 - Metal connection ear of the third insulating pillar, 18 - First arm, 19 - Second arm, 20 - Third arm, 21 - Fourth arm, 22 - Connecting rod. Detailed implementation mode

[0042] To make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and the accompanying drawings. The illustrative embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0043] Embodiment 1

[0044] As Figure 1 shown, the embodiment of the present application provides a power supply system for a four-column type low-voltage disconnect switch, including a four-column type low-voltage disconnect switch, a distribution box 12, a transformer 13, an electromagnetic lock 14, a data acquisition device 15, and a server 16.

[0045] When the first normally closed knife switch 6 between the first insulating pillar 2 and the second insulating pillar 3 on the four-column type low-voltage disconnect switch is closed, the normally open knife switch 8 between the second insulating pillar 3 and the third insulating pillar 4 is opened, and the second normally closed knife switch 10 between the third insulating pillar 4 and the fourth insulating pillar 5 is closed, the four-column type low-voltage disconnect switch connects the transformer 13 to the distribution box 12 and connects the distribution box 12 to the user side; when the normally open knife switch 8 between the second insulating pillar 3 and the third insulating pillar 4 on the four-column type low-voltage disconnect switch is closed, the first normally closed knife switch 6 between the first insulating pillar 2 and the second insulating pillar 3 is opened, and the second normally closed knife switch 10 between the third insulating pillar 4 and the fourth insulating pillar 5 is opened, the four-column type low-voltage disconnect switch connects the transformer 13 to the user side; the electromagnetic lock 14 is arranged on the box door of the distribution box 12, and both the electromagnetic lock 14 and the data acquisition device 15 are electrically connected to the server 16, and the data acquisition device 15 is used to collect the image data of the four-column type low-voltage disconnect switch.

[0046] A power supply system of a four-column low-voltage disconnect switch provided by an embodiment of the present application can directly connect a transformer 13 to the user side while disconnecting the connection with a distribution box 12, realizing power-off maintenance. And a data acquisition device 15 is provided, which can acquire image data of the four-column low-voltage disconnect switch and send it to a server 16, and the server 16 can identify the image data of the four-column low-voltage disconnect switch to obtain the working state of the four-column low-voltage disconnect switch. When the working state of the four-column low-voltage disconnect switch is the maintenance state (that is, when the transformer 13 is connected to the user side), the electromagnetic lock 14 on the distribution box 12 is controlled to open, thus avoiding live operation by staff.

[0047] When in the normal power supply state, the first normally closed knife switch 6 is closed, the normally open knife switch 8 is open, and the second normally closed knife switch 10 is closed. The transformer 13 is connected to the distribution box 12 through the four-column low-voltage disconnect switch, and the distribution box 12 is connected to the user side. When it is necessary to switch the normal power supply state to the maintenance state, first close the normally open knife switch 8, and then disconnect the first normally closed knife switch 6 and the second normally closed knife switch 10 to achieve power-off maintenance.

[0048] In a possible implementation manner, the four-column low-voltage disconnect switch includes a mounting base 1, a first insulating column 2, a second insulating column 3, a third insulating column 4, a fourth insulating column 5, a first normally closed knife switch 6, a normally open knife switch 8, and a second normally closed knife switch 10.

[0049] The first insulating column 2, the second insulating column 3, the third insulating column 4, and the fourth insulating column 5 are uniformly arranged on the mounting base 1. Metal connection lugs are provided at the ends of the first insulating column 2, the second insulating column 3, the third insulating column 4, and the fourth insulating column 5 that are far from the mounting base 1. The metal connection lug of the first insulating column 2 is connected to the incoming line end of the distribution box 12, the outgoing line end of the distribution box 12 is connected to the metal connection lug of the fourth insulating column 5, the metal connection lug of the second insulating column 3 is connected to the outgoing line end of the transformer 13, and the incoming line end of the user side is connected to the metal connection lug of the third insulating column 4.

[0050] One end of the first normally closed knife switch 6 and one end of the normally open knife switch 8 are both hinged to the metal connection lug of the second insulating column 3, and one end of the second normally closed knife switch 10 is hinged to the fourth insulating column 5.

[0051] When the first normally closed knife switch 6 is closed, the other end of the first normally closed knife switch 6 is connected to the metal connection lug of the first insulating column 2; when the normally open knife switch 8 is closed, the other end of the normally open knife switch 8 is connected to the metal connection lug of the third insulating column 4; when the second normally closed knife switch 10 is closed, the other end of the second normally closed knife switch 10 is connected to the metal connection lug of the third insulating column 4.

[0052] By setting the first normally closed switch blade 6, normally open switch blade 8, and second normally closed switch blade 10, it is convenient to switch the connection relationship among the transformer 13, distribution box 12, and the user side, thereby realizing power-off maintenance.

[0053] In a possible implementation manner, the four-column low-voltage disconnecting switch further includes a first limiting block 7, a second limiting block 9, and an I-shaped limiting device 11.

[0054] The first limiting block 7 is arranged on the first normally closed switch blade 6, and the second limiting block 9 is arranged on the normally open switch blade 8; when the first normally closed switch blade 6 is closed and the normally open switch blade 8 is opened, the second limiting block 9 limits the first limiting block 7 to prevent the first normally closed switch blade 6 from rotating.

[0055] When the first normally closed switch blade 6 is opened and the normally open switch blade 8 is closed, the first limiting block 7 limits the second limiting block 9 to prevent the normally open switch blade 8 from rotating.

[0056] For example, the side surfaces of the first limiting block 7 and the second limiting block 9 are both right-angled triangles, and the other surfaces are all rectangular surfaces. Therefore, there are two mutually perpendicular rectangular surfaces on both the first limiting block 7 and the second limiting block 9. For the convenience of description, the two mutually perpendicular rectangular surfaces are respectively denoted as the first vertical surface and the second vertical surface, and the inclined surface between the two mutually perpendicular rectangular surfaces is denoted as the connecting surface. The first vertical surface on the first limiting block 7 is fixed on the first normally closed switch blade 6, and the second vertical surface on the first limiting block 7 is perpendicular to the first normally closed switch blade 6. The first vertical surface on the second limiting block 9 is fixed on the normally open switch blade 8, and the second vertical surface on the second limiting block 9 is perpendicular to the normally open switch blade 8. When the first normally closed switch blade 6 is closed and the normally open switch blade 8 is opened, the edge between the second vertical surface and the connecting surface on the second limiting block 9 contacts the second vertical surface on the first limiting block 7, thereby realizing the limitation of the first normally closed switch blade 6. When the first normally closed switch blade 6 is opened and the normally open switch blade 8 is closed, the edge between the second vertical surface and the connecting surface on the first limiting block 7 contacts the second vertical surface on the second limiting block 9, thereby realizing the limitation of the normally open switch blade 8.

[0057] Such as Figure 2 and Figure 3As shown together, the I-shaped limiting device 11 includes a first arm 18, a second arm 19, a third arm 20, a fourth arm 21 and a connecting rod 22. The first arm 18 and the second arm 19 are symmetrically arranged at one end of the connecting rod 22 close to the third insulating column 4, and the third arm 20 and the fourth arm 21 are symmetrically arranged at the other end of the connecting rod 22. The angles between the first arm 18, the second arm 19, the third arm 20, the fourth arm 21 and the connecting rod 22 are all acute angles (that is, the end of the first arm 18 away from the connecting rod 22 approaches the end of the third arm 20 away from the connecting rod 22, and the end of the second arm 19 away from the connecting rod 22 approaches the end of the fourth arm 21 away from the connecting rod 22).

[0058] Optionally, the first arm 18 and the second arm 19 have the same length, the third arm 20 and the fourth arm 21 have the same length, and the length of the first arm 18 is greater than the length of the third arm 20.

[0059] The middle part of the connecting rod 22 on the I-shaped limiting device 11 is rotationally connected to the metal connection ear 17 of the third insulating column 4 in a damped manner; the first arm 18 and the third arm 20 are located on the side close to the normally open knife switch 8, and the second arm 19 and the fourth arm 21 are located on the side close to the second normally closed knife switch 10.

[0060] When the normally open knife switch 8 is closed, the normally open knife switch 8 is located in the cavity formed by the connecting rod 22, the first arm 18 and the third arm 20, and the normally open knife switch 8 is limited by the third arm 20. At this time, the third arm 20 hooks the normally open knife switch 8, resulting in it being unable to be disconnected, and the four-column low-voltage disconnector is in the maintenance state. When it is necessary to switch from the maintenance state to the normal power supply state, it is necessary to first close the second normally closed knife switch 10, so that the second normally closed knife switch 10 presses the second arm 19, thereby causing the I-shaped limiting device 11 to rotate, driving the first arm 18 and the third arm 20. The first arm 18 pushes the normally open knife switch 8 to move, and at this time the third arm 20 is also rotating, enabling the normally open knife switch 8 to rotate successfully to achieve the disconnection of the normally open knife switch 8.

[0061] It should be noted that when the normally open knife switch 8 is closed and the second normally closed knife switch 10 rotates, the end of the second normally closed knife switch 10 away from the fourth insulating column 5 just does not contact the end of the fourth arm 21 away from the connecting rod 22, or the end of the second normally closed knife switch 10 away from the fourth insulating column 5 is 5 mm away from the end of the fourth arm 21 away from the connecting rod 22, so that the second normally closed knife switch 10 can smoothly rotate into the cavity formed by the connecting rod 22, the first arm 18 and the third arm 20.

[0062] When the second normally closed knife switch 10 is closed, the second normally closed knife switch 10 is located in the cavity formed by the connecting rod 22, the second arm 19 and the fourth arm 21, and the second normally closed knife switch 10 is limited by the fourth arm 21.

[0063] If the second normally closed knife switch 10 needs to be disconnected, the normally open knife switch 8 needs to be closed first, so that the normally open knife switch 8 pushes the I-shaped limiting device 11 to rotate, so that the second normally closed knife switch 10 can exit from the cavity formed by the connecting rod 22, the second arm 19 and the fourth arm 21.

[0064] It should be noted that when the second normally closed knife switch 10 is closed and the normally open knife switch 8 rotates, the end of the normally open knife switch 8 far from the second insulating pillar 3 just does not contact the end of the third arm 20 far from the third insulating pillar 4, or the end of the normally open knife switch 8 far from the second insulating pillar 3 is 5 mm away from the end of the third arm 20 far from the third insulating pillar 4, so that the normally open knife switch 8 can smoothly rotate into the cavity formed by the connecting rod 22, the second arm 19 and the fourth arm 21.

[0065] Through the interlock between the first normally closed knife switch 6, the normally open knife switch 8 and the second normally closed knife switch 10, when the first normally closed knife switch 6 and the second normally closed knife switch 10 are closed, the normally open knife switch 8 must be closed to disconnect the first normally closed knife switch 6 and the second normally closed knife switch 10. When the normally open knife switch 8 is closed, the first normally closed knife switch 6 and the second normally closed knife switch 10 must be closed to disconnect the knife switch of the normally open knife switch 8, so as to realize the interlock function and avoid misoperation by the staff.

[0066] In a possible implementation manner, the data acquisition device 15 is an image acquisition device.

[0067] Embodiment 2

[0068] As Figure 4 shown, the embodiment of the present application provides a working method for a power supply system of a four-column low-voltage disconnecting switch, including:

[0069] S1. Obtain real-time image data of the four-column low-voltage disconnecting switch through the data acquisition device 15.

[0070] S2. Identify the real-time image data through the server 16 to obtain the working state of the four-column low-voltage disconnecting switch. The working state includes a normal power supply state or a maintenance state. The normal power supply state means that the first normally closed knife switch 6 is closed, the normally open knife switch 8 is disconnected, and the second normally closed knife switch 10 is closed. The maintenance state means that the normally open knife switch 8 is closed, the first normally closed knife switch 6 is disconnected, and the second normally closed knife switch 10 is disconnected.

[0071] S2. Control the electromagnetic lock 14 according to the working state of the four-column low-voltage disconnecting switch.

[0072] A working method of a power supply system for a four-column low-voltage disconnector provided by an embodiment of the present application can force workers to switch the four-column low-voltage disconnector from the normal power supply state to the maintenance state before allowing the workers to perform internal maintenance on the distribution box 12, realizing maintenance without power interruption and avoiding live operation by the workers.

[0073] In a possible implementation manner, the real-time image data is recognized to obtain the working state of the four-column low-voltage disconnector, including:

[0074] Training data is obtained to construct a working state recognition model.

[0075] The working state recognition model is trained according to the training data to obtain a trained working state recognition model;

[0076] Taking the real-time image data as the input of the trained working state recognition model, the working state of the four-column low-voltage disconnector is obtained.

[0077] In a possible implementation manner, the training data is pre-stored data, and the training data includes training image data corresponding to the four-column low-voltage disconnector and the working state.

[0078] In a possible implementation manner, the working state recognition model is a neural network model.

[0079] Optionally, the working state recognition model can be a BP (Back Propagation) neural network.

[0080] In a possible implementation manner, training the working state recognition model according to the training data to obtain a trained working state recognition model includes:

[0081] Taking the training image data as the input of the working state recognition model and the working state as the expected output of the working state recognition model, training the working state recognition model to obtain a trained working state recognition model.

[0082] Optionally, the following method can be used to train the working state recognition model:

[0083] Initialize the weights of the working state recognition model.

[0084] Construct the error function E as:

[0085]

[0086] where d i represents the expected output corresponding to the i-th neuron in the output layer, and y iDenote the output of the $i$-th neuron in the output layer, where $i = 1, 2, \ldots, n$, and $n$ represents the total number of neurons in the output layer.

[0087] Use the training image data as the input of the working state recognition model, use the working state as the expected output of the working state recognition model, and obtain the error function value of the working state recognition model according to the error function.

[0088] Judge whether the error function value is less than the set threshold. If so, obtain the trained working state recognition model; otherwise, update the weights of the working state recognition model.

[0089] Update the weights of the working state recognition model as:

[0090] $w(t + 1)=w(t)+\Delta w(t)$

[0091]

[0092]

[0093]

[0094] where $w(t + 1)$ represents the updated weight, $w(t)$ represents the weight before update; $\Delta w(t)$ represents the current weight update amount, that is, the weight update amount of the $t$-th training; $\Delta w(t - 1)$ represents the previous weight update amount, that is, the weight update amount of the $(t - 1)$-th training, $\alpha$ represents the momentum coefficient, $\eta$ represents the learning rate, and $E(t)$ represents the error function value of the $t$-th training. represents the symbol of taking partial derivative, $\eta(t)$ represents the learning rate of the $t$-th training, $\eta(t - 1)$ represents the learning rate of the $(t - 1)$-th training, $u$ represents the first learning rate adjustment parameter, $d$ represents the first learning rate adjustment parameter, both $u$ and $d$ are constant terms, $\delta(t - 1)$ represents the intermediate coefficient of the $(t - 1)$-th training, $\delta(t)$ represents the intermediate coefficient of the $t$-th training, and $\varphi$ represents the third learning rate adjustment parameter, $\varphi$ is a constant term and can be 0.7.

[0095] By increasing the momentum coefficient, the occurrence of oscillation phenomena can be effectively avoided during the training process, and the learning rate is accelerated. By adjusting the learning rate, the learning speed is improved.

[0096] In a possible implementation manner, control the electromagnetic lock 14 according to the working state of the four-column type low-voltage disconnecting switch, including:

[0097] Judge whether the working state of the four-column type low-voltage disconnecting switch is the maintenance state. If so, open the electromagnetic lock 14; otherwise, do not open the electromagnetic lock 14.

[0098] In the above specific embodiments, the object, technical solution and beneficial effects of the present invention have been further described in detail. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A power supply system for a four-column low-voltage disconnector, characterized in that, it includes a four-column low-voltage disconnector, a distribution box, a transformer, an electromagnetic lock, a data acquisition device, and a server; The four-column low-voltage disconnector includes a mounting base, a first insulating column, a second insulating column, a third insulating column, a fourth insulating column, a first normally closed knife switch, a normally open knife switch, and a second normally closed knife switch; The first insulating column, the second insulating column, the third insulating column, and the fourth insulating column are evenly arranged on the mounting base. Metal connection lugs are provided at the ends of the first insulating column, the second insulating column, the third insulating column, and the fourth insulating column away from the mounting base. The metal connection lug of the first insulating column is connected to the incoming line end of the distribution box, and the outgoing line end of the distribution box is connected to the metal connection lug of the fourth insulating column. The metal connection lug of the second insulating column is connected to the outgoing line end of the transformer, and the incoming line end of the user side is connected to the metal connection lug of the third insulating column; One end of the first normally closed knife switch and one end of the normally open knife switch are both hinged to the metal connection lug of the second insulating column, and one end of the second normally closed knife switch is hinged to the fourth insulating column; When the first normally closed knife switch is closed, the other end of the first normally closed knife switch is connected to the metal connection lug of the first insulating column; When the normally open knife switch is closed, the other end of the normally open knife switch is connected to the metal connection lug of the third insulating column; When the second normally closed knife switch is closed, the other end of the second normally closed knife switch is connected to the metal connection lug of the third insulating column; The electromagnetic lock is arranged on the door of the distribution box, and both the electromagnetic lock and the data acquisition device are electrically connected to the server; The data acquisition device is used to acquire the image data of the four-column low-voltage disconnector; The server is used to identify the image data of the four-column low-voltage disconnector to obtain the working state of the four-column low-voltage disconnector, and control the electromagnetic lock according to the working state of the four-column low-voltage disconnector, where the working state includes a normal power supply state or a maintenance state.

2. The power supply system for a four-column low-voltage disconnector according to claim 1, characterized in that, When the first normally closed knife switch between the first insulating column and the second insulating column on the four-column low-voltage disconnector is closed, the normally open knife switch between the second insulating column and the third insulating column is opened, and the second normally closed knife switch between the third insulating column and the fourth insulating column is closed, the four-column low-voltage disconnector connects the transformer to the distribution box and connects the distribution box to the user side; When the normally open knife switch between the second insulating column and the third insulating column on the four-column low-voltage disconnector is closed, the first normally closed knife switch between the first insulating column and the second insulating column is opened, and the second normally closed knife switch between the third insulating column and the fourth insulating column is opened, the four-column low-voltage disconnector connects the transformer to the user side; The normal power supply state means that the first normally closed knife switch is closed, the normally open knife switch is opened, and the second normally closed knife switch is closed, and the maintenance state means that the normally open knife switch is closed, the first normally closed knife switch is opened, and the second normally closed knife switch is opened.

3. The power supply system for a four-column low-voltage disconnector according to claim 1, characterized in that, The four-column low-voltage disconnect switch further includes a first limit block, a second limit block, and an I-shaped limit device; the first limit block is arranged on the first normally-closed knife switch, and the second limit block is arranged on the normally-open knife switch; when the first normally-closed knife switch is closed and the normally-open knife switch is open, the second limit block limits the first limit block to prevent the first normally-closed knife switch from rotating; when the first normally-closed knife switch is open and the normally-open knife switch is closed, the first limit block limits the second limit block to prevent the normally-open knife switch from rotating; the I-shaped limit device includes a first arm, a second arm, a third arm, a fourth arm, and a connecting rod. The first arm and the second arm are symmetrically arranged at one end of the connecting rod, and the third arm and the fourth arm are symmetrically arranged at the other end of the connecting rod. The angles between the first arm, the second arm, the third arm, the fourth arm and the connecting rod are all acute angles. The middle part of the connecting rod on the I-shaped limit device is rotatably connected to the metal connection ear of the third insulating column in a damped manner; the first arm and the third arm are located on the side close to the normally-open knife switch, and the second arm and the fourth arm are located on the side close to the second normally-closed knife switch; when the normally-open knife switch is closed, the normally-open knife switch is located in the cavity formed by the connecting rod, the first arm and the third arm, and the normally-open knife switch is limited by the third arm; when the second normally-closed knife switch is closed, the second normally-closed knife switch is located in the cavity formed by the connecting rod, the second arm and the fourth arm, and the second normally-closed knife switch is limited by the fourth arm.

4. The power supply system of a four-column low-voltage disconnect switch according to claim 1, wherein, The server is used to identify the image data of the four-column low-voltage disconnect switch to obtain the working state of the four-column low-voltage disconnect switch, including: obtaining training data, constructing a working state recognition model; training the working state recognition model according to the training data to obtain a trained working state recognition model. Using the image data as the input of the trained working state recognition model to obtain the working state of the four-column low-voltage disconnect switch.

5. The power supply system of a four-column low-voltage disconnect switch according to claim 4, wherein, The training data is pre-stored data, and the training data includes the training image data corresponding to the four-column low-voltage disconnect switch and the working state.

6. The power supply system of a four-column low-voltage disconnect switch according to claim 5, wherein, The working state recognition model is a neural network model.

7. The power supply system of a four-column low-voltage disconnect switch according to claim 6, wherein, Training the working state recognition model according to the training data to obtain a trained working state recognition model, including: using the training image data as the input of the working state recognition model, using the working state as the expected output of the working state recognition model, and training the working state recognition model to obtain a trained working state recognition model.

8. The power supply system of a four-column low-voltage disconnect switch according to claim 1, wherein, Control the electromagnetic lock according to the working state of the four-column low-voltage disconnect switch, including: judging whether the working state of the four-column low-voltage disconnect switch is the maintenance state. If so, open the electromagnetic lock; otherwise, do not open the electromagnetic lock.

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