Trolley device for electricity testing and grounding of remote control switch cabinet and control method of trolley device

Abstract

The invention discloses a trolley device for electricity testing and grounding of a remote control type switch cabinet and a control method of the trolley device. The trolley device comprises an electric trolley and a remote control operation assembly arranged on the electric trolley. The electric trolley is provided with a grounding execution assembly and a voltage sensing assembly with dual redundancy configuration, the voltage sensing assembly is used for realizing electricity testing dual confirmation, the grounding execution assembly is used for executing grounding operation, and the remote control operation assembly can control and execute electricity testing and grounding actions; the remote control operation assembly comprises a controller and a remote controller which are in wireless communication, the remote controller remotely operates the controller to execute electric trolley electricity testing and grounding actions and receives and displays state information of the electric trolley, and the controller judges whether grounding operation is carried out or not through comprehensive electricity testing double confirmation. Electricity testing and grounding operation of the switch cabinet are completed through remote control operation, the live-line state of the bus of the switch cabinet can be accurately judged through double-confirmation electricity testing, the maintenance efficiency of the switch cabinet of the transformer substation is improved, and the safety of operation and maintenance personnel is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of switch cabinet operation and maintenance, and specifically relates to a remote-controlled switch cabinet electrical grounding testing trolley device and a control method thereof. Background Art

[0002] At present, when the substation switch cabinet is shut down for maintenance, in order to ensure the safety of personnel and equipment, it is necessary to carry out busbar power testing and grounding work in accordance with relevant specifications to ensure that there is no residual charge. At present, there are two common power testing methods in the actual on-site operation of substation switch cabinets for power testing and grounding: one is that after the switch cabinet interval is shut down, the maintenance personnel manually open the valve and use a tester with insulation function to conduct power testing operations inside the cabinet; the other is that if there is a companion shutdown on the low-voltage side of the main transformer at the same time, the power testing operation can be carried out at the busbar crossing position. If the above two methods cannot be implemented, direct power testing operations cannot be carried out. In addition, the above-mentioned power testing methods have hidden dangers to the personal safety of maintenance personnel or equipment safety. If the operator makes mistakes or omissions, or the equipment fails during the process, it may cause accidental discharge of the equipment, causing personal injury and economic losses.

[0003] As an improvement, some control-assisted electrical testing and grounding devices have appeared, which complete the switch cabinet electrical testing and grounding operations through certain automated control operations. However, at present, the accuracy of electrical testing by existing electrical testing and grounding equipment needs to be further improved, and due to the low degree of automation, more manual operations may be required, and remote control operations cannot be achieved, which cannot effectively improve the possible safety hazards of maintenance personnel and equipment. Summary of the invention

[0004] The present invention provides a remote-controlled switch cabinet electrical grounding test trolley device and a control method thereof, aiming to solve the problem that the accuracy of the electrical grounding test of the existing electrical grounding test equipment needs to be further improved, and due to the low degree of automation, more manual operations may be required, remote control operation cannot be achieved, and potential safety hazards of maintenance personnel and equipment cannot be effectively improved.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme: The present invention provides a trolley device for testing the electrical grounding of a remote-controlled switch cabinet, the trolley device comprising an electric trolley and a remote control operating component configured on the electric trolley; wherein: The electric trolley includes an electric chassis and a trolley frame arranged thereon, the trolley frame is provided with a voltage sensing component and a grounding actuator component, and the remote control operation component can control the grounding actuator component to perform the electric test and grounding actions of the electric trolley with the help of the electric chassis and the trolley frame; The remote control operation component includes a controller and a remote controller. The controller is arranged on the electric vehicle, and the remote controller is arranged outside the electric vehicle. The remote controller can exchange data with the controller through wireless transmission. The voltage sensing assembly includes a three-phase contact assembly and two voltage sensors configured for each phase contact assembly. The voltage sensing assembly is used to detect and display the energized state of the busbar of the grounding switch cabinet to be tested and upload it to the controller; the remote control can control the grounding action of the busbar of the grounding switch cabinet to be tested when the controller determines that both voltage sensors detect no voltage signal.

[0006] In some embodiments, the voltage sensing assembly includes a contact assembly and a voltage sensor and a live display configured thereon; in an operating state, the contact assembly contacts the busbar of the switch cabinet to be tested, and the voltage sensor transmits the voltage signal of the busbar of the switch cabinet to be tested to the controller. The controller determines whether the busbar of the switch cabinet to be tested is energized based on the voltage signal, and then displays the result through the live display and the remote control.

[0007] Furthermore, the contact assembly includes at least one contact arm and a plum blossom contact arranged at one end of the contact arm, the other end of the contact arm is connected to the trolley frame, and the voltage sensor is configured on the contact arm.

[0008] Furthermore, two voltage sensors are arranged on the contact assembly; when all voltage sensors detect no voltage signal, the controller determines that the busbar of the switch cabinet to be tested is not energized and the grounding operation can be performed; when any voltage sensor detects a voltage signal, the controller determines that the busbar of the switch cabinet to be tested is energized and the grounding operation cannot be performed.

[0009] Furthermore, the grounding execution component includes an electric grounding knife and a grounding knife status indicator. The electric grounding knife is controlled by the remote control operation component to perform grounding closing and grounding opening actions. The grounding knife status indicator is used to display the action status of the electric grounding knife.

[0010] In some embodiments, the controller includes an external signal acquisition module, a status indication module, a main controller module, a power module, a wireless unit and antenna module, an electric trolley module, and an electric ground knife module; The external signal acquisition module is used to collect external signals based on the electric trolley; the electric trolley module and the electric ground knife module are used to control the control drive unit of the electric trolley; the main controller module is used to analyze and process the received data and then issue instructions to control the trolley device; the power supply module is used to provide power; the status indication module is used to display the status of the trolley device in real time.

[0011] Furthermore, the wireless unit and the antenna module are used to realize wireless data exchange and transmission between the controller and the remote controller, and the wireless unit and the antenna module adopt Lora transmission.

[0012] Furthermore, the controller also includes a current limiting detection module, which is used to monitor the current signal of the trolley device during operation in real time and transmit the current signal to the main controller module. The main controller module analyzes the operating status of the trolley device according to the current signal and determines whether to continue to operate the trolley device according to the operating status.

[0013] Furthermore, the remote control includes a main remote control module, a power management module, a human-computer interaction module, a wireless unit and an antenna module; the main remote control module is used for human-computer interaction display and operation, and the wireless unit, the antenna module and the power management module are used for data acquisition, analysis and processing; the wireless unit and the antenna module are used to realize wireless data exchange between the controller and the remote control; the power management module is used to control the battery of the remote control; the human-computer interaction module is used to provide a display carrier and an operation carrier.

[0014] The present invention also provides a control method for a trolley device for testing electrical grounding of a remote-controlled switch cabinet, comprising the following steps: Place the trolley device into the substation transfer trolley, push the transfer trolley into the trolley room, connect the transfer trolley with the switch cabinet connector, and adjust and confirm the test position; Turn on the power supply and remote control of the trolley device, and remotely control the trolley device through the remote control. After completing the self-test and confirming that the function of the voltage sensor component is effective, remotely control the electric chassis vehicle to make the electric chassis vehicle run from the test position to the working position to complete the warehouse entry action; The voltage sensor component is used to determine whether the busbar of the switch cabinet to be tested is energized. The judgment result is displayed on the remote control. If any phase is detected to be energized, the remote control operation is locked and the grounding actuator is not started; After the busbar of the switch cabinet to be tested meets the no-power judgment, the grounding actuator of the trolley is controlled by the remote controller to perform electric closing operation; After completing the maintenance work, the grounding actuator is operated by the remote control to separate the grounding switch, start the withdrawal action, and make the electric trolley return from the working position to the test position.

[0015] Compared with the prior art, the remote control switch cabinet electrical grounding test trolley device and control method thereof of the present invention have the following beneficial effects: The present invention discloses a trolley device for testing electricity and grounding of a remote-controlled switch cabinet. The trolley device comprises an electric trolley and a remote-control operating component configured on the electric trolley; wherein: the electric trolley comprises an electric chassis vehicle and a trolley frame arranged thereon, the trolley frame is provided with a voltage sensing component and a grounding execution component, and the remote-control operating component can control the grounding execution component with the help of the electric chassis vehicle and the trolley frame to perform the electricity testing and grounding actions of the electric trolley; the remote-control operating component comprises a controller and a remote controller, the controller is arranged on the electric trolley, and the remote controller is arranged outside the electric trolley; the remote controller can exchange data with the controller through wireless transmission; the voltage sensing component comprises a three-phase contact component and two voltage sensors are configured for each phase contact component, the voltage sensing component is used to detect and display the charged state of the busbar of the grounding switch cabinet to be tested and upload it to the controller; the remote controller can control the grounding action of the busbar of the grounding switch cabinet to be tested when the controller determines that both voltage sensors have detected voltage signals. Based on the above, the present invention integrates the functions of power testing and grounding into one, and completes the power testing and grounding operation of the switch cabinet through remote control operation. The operation adopts a standardized standard power testing and grounding process, and the voltage sensing component of the present invention can accurately test the power to achieve double confirmation to determine whether the grounding execution component can perform the grounding operation, thereby improving the safety of subsequent operations by operators. At the same time, during the entire power testing process, maintenance personnel do not need to directly contact and monitor the switch cabinet equipment to be tested, which can effectively avoid personal injury caused by accidental discharge of the switch cabinet to be tested, thereby ensuring personal safety and improving the safety factor. The present invention provides an intelligent trolley device that integrates "double confirmation" of power testing, grounding, remote control operation, signal feedback and logical judgment. The trolley device is suitable for maintenance operations of substation switch cabinets, improves the maintenance efficiency of substation switch cabinets, reduces operational risks, ensures the safety of operation and maintenance personnel, and has better applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings in the specification are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0017] Figure 1 It is a structural schematic diagram of a trolley device for testing electrical grounding of a remote-controlled switch cabinet and a trolley device in a control method thereof according to the present invention; Figure 2 It is a side structural schematic diagram of a trolley device for testing and grounding electricity in a remote-controlled switch cabinet and a control method thereof according to the present invention; Figure 3 A schematic diagram of the top view of the structure of a trolley device for testing and grounding electricity in a remote-controlled switch cabinet and a control method thereof according to the present invention; Figure 4It is a front structural schematic diagram of a trolley device for testing and grounding electricity in a remote-controlled switch cabinet and a control method thereof according to the present invention; Figure 5 A schematic diagram of the principle of a remote control switch cabinet electrical grounding test trolley device and a control method thereof of the present invention; Figure 6 The present invention is a schematic diagram of the control logic of executing the electrical testing and grounding operation in a trolley device for electrical testing and grounding of a remote-controlled switch cabinet and a control method thereof.

[0018] Among them, 1. Live display, 2. Grounding knife status indicator, 3. Electric chassis, 4. Frame, 5. Voltage sensor, 6. Electric grounding knife, 7. Contact arm, 8. Plum blossom contact, 9. Controller, 10. Panel, 11. Remote control. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0022] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0023] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] How to remotely control the switch cabinet to complete the electrical testing and grounding operation, improve the operational safety, avoid personal injury caused by direct contact of maintenance personnel with the equipment, and how to ensure the personal safety of maintenance personnel.

[0026] like Figure 1-Figure 4 As shown, the present invention provides a trolley device for testing the electrical grounding of a remote-controlled switch cabinet, the trolley device comprises an electric trolley and a remote control operating component configured on the electric trolley; wherein: The electric trolley includes an electric chassis and a trolley frame arranged thereon, the trolley frame is provided with a voltage sensing component and a grounding actuator component, and the remote control operation component can control the grounding actuator component to perform the grounding action of the electric trolley with the help of the electric chassis and the trolley frame; The remote control operation component includes a controller and a remote controller. The controller is arranged on the electric vehicle, and the remote controller is arranged outside the electric vehicle. The remote controller can exchange data with the controller through wireless transmission. The voltage sensing assembly includes a three-phase contact assembly and two voltage sensors configured for each phase contact assembly. The voltage sensing assembly is used to detect and display the energized state of the busbar of the grounding switch cabinet to be tested and upload it to the controller; the remote control can control the grounding action of the busbar of the grounding switch cabinet to be tested when the controller determines that both voltage sensors have detected voltage signals.

[0027] The present invention realizes non-contact electrical testing and grounding of the switch cabinet by remotely controlling the trolley, which greatly improves the safety of personnel and equipment during the maintenance process. The operator is away from the switch cabinet throughout the process, and the electric entry and exit vehicle and the ground knife opening and closing operations are performed by remote control. The device has a complete electrical testing and grounding control logic and mechanical and electrical anti-mistake locking functions, which avoids personal injury and equipment failure caused by improper operation. The trolley device components adopt a modular and standardized design, which is convenient for replacement and maintenance of components. It can be adapted to KYN-type center-mounted switch cabinets from different suppliers, and has relatively wide applicability.

[0028] The voltage sensing assembly includes a contact assembly, a voltage sensor 5 and a live display 1 configured thereon; the contact assembly contacts the busbar of the switch cabinet to be tested, and the voltage sensor 5 transmits the live state of the busbar of the switch cabinet to be tested to the controller 9. The controller 9 determines whether the busbar of the switch cabinet to be tested is live based on the signal of the voltage sensor 5, and then displays the result through the live display 1 and the remote control 11. The voltage sensing assembly can accurately monitor the live state of the busbar of the switch cabinet to be tested, and display the result in real time through the controller 9 and the remote control 11, effectively avoiding the risk of live operation.

[0029] In some preferred embodiments, the voltage sensor 5 of the present invention is provided with two, and the two voltage sensors 5 are both configured in the contact assembly; when both voltage sensors 5 detect no voltage signal, the controller 9 determines that the busbar of the switch cabinet to be tested is not energized. The present invention adopts a redundant design of two sets of voltage sensors, and the two voltage sensors 5 realize the "double confirmation" of the energized state of the busbar of the switch cabinet to be tested, which effectively reduces the risk of failure of the switch cabinet electrical detection and enhances the accuracy and reliability of the electrical detection. In addition, the contact assembly of the present invention includes at least one contact arm 7 and a plum blossom contact 8 arranged at one end of the contact arm 7, the other end of the contact arm 7 is connected to the trolley frame 4, and the voltage sensor 5 is configured on the contact arm 7. The present invention improves the effectiveness of monitoring the voltage signal of the busbar of the switch cabinet to be tested through the design of the plum blossom contact.

[0030] The grounding actuator assembly includes an electric grounding knife 6 and a grounding knife status indicator 2. The electric grounding knife 6 is used to control the grounding closing and grounding opening actions through the remote control operation assembly, and the grounding knife status indicator 2 is used to display the action status of the electric grounding knife 6. The grounding actuator assembly enables the trolley device to automatically complete the grounding closing and grounding opening actions. The grounding knife status indicator enables the operator to understand the action status of the grounding knife switch in real time.

[0031] The frame 4 of the present invention is fixed to the side of the electric chassis 3 away from the switch cabinet; on the side of the frame 4 close to the switch cabinet, the contact arm 7 and the plum blossom contact 8 are installed on the upper part of the frame 3, two sets of voltage sensors 5 are installed in the middle of the frame 3, and the electric grounding knife 6 is installed in the lower part of the frame 3; the side of the frame 3 away from the switch cabinet is installed with a controller 9 and a panel 10; the panel 10 is provided with a live display 1 and a grounding knife status indicator 2, which are connected to the corresponding components through connecting wires; the remote controller 11 is independent of the structure of the electric trolley, and remotely controls the operation of the trolley device through wireless communication with the controller 9. The components of the trolley device are modular standard designs, which are relatively easy to replace and maintain, and can be adapted to KYN type center-mounted switch cabinets of different suppliers, and have a certain degree of versatility.

[0032] like Figure 5 As shown, the controller part principle of the controller 9 of the present invention is as follows: The external signal module mainly includes the following parts: a. Position signal: ground knife closed position, open position, trolley working position, test position. According to the current position status of the mechanism, the status indicator lights up and goes out. Before the mechanism moves, it needs to judge whether the current position meets the action requirements. If the conditions are not met, the action will not be responded, and the status indicator will give corresponding prompts; b. Interlocking signal: ground switch interlocking, trolley interlocking, manual / electric interlocking, etc. c. Trigger signal: grounding on, grounding off, remote in, remote out, used to control the action of the mechanism; d. Configuration signal: remote / local control. Through this signal, the controller can be conveniently configured to achieve local control or remote control.

[0033] The status indication module includes: operation, alarm, working position, test position, closed position, and open position indication, which are mainly used to display the position status of the controller's external mechanism and the operation status inside the controller.

[0034] The main controller module is used to collect, analyze and process external data, then build a corresponding model and control the external execution unit according to the model to realize the electric operation of the trolley device.

[0035] The control power supply module is used to provide a regulated power supply to provide power for the main controller and external control unit circuits.

[0036] The main power module provides power for the control power supply and the operation of the trolley motor and the grounding knife motor.

[0037] The wireless unit and the antenna module are used to realize the wireless exchange and transmission of controller data and remote controller data. The wireless transmission technology of the present invention adopts Lora transmission with good real-time data transmission performance.

[0038] The current limiting detection module is used to detect the current current in real time during the operation of the trolley device. The main controller performs software processing based on the collected signals, analyzes the current operation status, and decides whether to immediately cut off the power supply or maintain the current operation based on the operation status.

[0039] The electric trolley and ground knife module is a control drive unit used to control the forward and reverse rotation of the electric trolley and ground knife motors.

[0040] The present invention adopts Lora transmission technology to realize wireless data exchange and transmission between the controller and the remote controller, thereby improving the stability and anti-interference ability of data transmission. When the current limiting detection module detects an abnormal situation, it can timely determine and stop the operation of the trolley device.

[0041] like Figure 5 As shown, the remote controller 11 of the present invention comprises: The main controller module is used for collecting, analyzing and processing data from the human-computer interaction display, wireless unit and power management part.

[0042] The power management module is mainly used to manage the internal lithium battery boost and provide power for the normal operation of the main controller, wireless unit, display, etc. It detects the battery power in real time and prompts charging when the battery power is low.

[0043] The human-computer interaction module is mainly implemented through the LCD display, which can view the current operation status of the mechanism and issue corresponding commands.

[0044] The wireless unit and the antenna module are used to realize wireless data exchange between the remote controller 11 and the controller 9.

[0045] The present invention also provides a control method for a trolley device for testing electrical grounding of a remote-controlled switch cabinet, comprising the following steps: Place the trolley device into the substation transfer trolley, push the transfer trolley into the trolley room, connect the transfer trolley with the switch cabinet connector, and adjust and confirm the test position; Turn on the power supply of the trolley device and the remote controller 11, remotely control the trolley device through the remote controller 11, complete the self-check and confirm that the function of the voltage sensor component is effective, then remotely control the electric chassis vehicle 3 to make the electric chassis vehicle 3 run from the test position to the working position to complete the warehouse entry action; The voltage sensor component is used to determine whether the busbar of the switch cabinet to be tested is energized. The determination result is displayed on the remote controller 11. If any phase is detected to be energized, the remote control operation is locked and the grounding actuator is not started. After the busbar of the switch cabinet to be tested meets the no-power judgment, the grounding actuator of the trolley is controlled by the remote controller 11 to perform an electric closing operation; After the inspection and maintenance work is completed, the grounding actuator is operated by the remote controller 11 to separate the grounding switch, start the withdrawal action, and make the electric trolley return from the working position to the test position.

[0046] The present invention also provides a control method for a trolley device for testing electricity and grounding of a remote-controlled switch cabinet. Before the trolley is operated, a self-inspection of the equipment is first performed. The operation process is divided into five steps: positioning operation, trolley entry, electricity testing operation, grounding operation, and reset operation.

[0047] like Figure 6 The following is the locking control logic. First, confirm that the trolley has passed the self-test, and then put it into the test position of the cabinet trolley room, close the cabinet door, and operate the electric chassis car to complete the entry action, and feedback the arrival signal. By detecting the position signal of the grounding trolley and the energized display signal, only in the test position or working position, and when the electrical test determines that the bus is not powered, the grounding knife is allowed to be controlled to close the switch, and the closing signal of the grounding knife is fed back. After the inspection is completed, the grounding is operated to open the switch, and the opening signal of the grounding knife is fed back. After the grounding knife switch opening signal and the working position signal meet the conditions, it is allowed to exit the warehouse, and the arrival signal is fed back after the exit is completed. After the position is detected, open the cabinet door and return the trolley device to the transfer trolley. The steps of the method are as follows: Equipment self-test: This step is a self-test step, which aims to detect that the trolley's power test circuit indication is correct and the grounding circuit is unobstructed. The high-voltage generator configured on the remote-controlled switch cabinet power test grounding trolley verifies that there is no abnormality in the equipment; On-site operation: In this step, place the test and grounding trolley on the original transfer trolley of the substation, accurately push the trolley into the trolley room, ensure that the pressure plate is open, achieve good contact between the internal test circuit contacts and the busbar contacts, connect the trolley and the switch cabinet connector, and close the compartment door after confirming the test position; Cart entering the warehouse: In this step, turn on the remote control device, turn on the car power and remote control, and after completing the self-test, operate the electric chassis to make it run from the test position to the working position to complete the warehouse entry action; Electricity test operation: This step is used to determine whether the busbar is energized. After the trolley enters the warehouse successfully, check the double-energized display to determine whether the power supply side is energized. If both double-energized displays show no power at the same time, it can be proved that the busbar is not energized. If any phase is detected to be energized, the grounding knife switch operation will be locked, and the grounding switch is not allowed to be closed; Grounding operation: This step is to ground the busbar after the power test operation is completed. When the power test operation is completed and both energized display sensors show no power at the same time, the grounding operation module of the grounding switch can be unlocked. The system gives the grounding switch electric operation authority. At this time, operate the grounding switch to perform electric closing operation; Reset operation: This step is performed after the maintenance work is completed. When the maintenance is completed, the grounding switch is separated and the retraction action is started to make the remote control switch cabinet electrical testing grounding trolley return from the working position to the test position.

[0048] In actual working conditions, before implementing this device, the target substation should be surveyed on site to understand the model, quantity, and layout of the existing switch cabinets in the station, collect relevant information and data, and select the corresponding model of the remote-controlled switch cabinet power test and grounding trolley according to the model and specific size of the switch cabinet in the station, and investigate the power supply situation of the electric power test and grounding trolley when it is used in the station to determine the power supply technical route. At the same time, determine the storage location of the trolley according to the environment in the substation switch room and design the storage protection tooling.

[0049] After configuring the remote control switch cabinet electrical testing and grounding trolley, the routine maintenance of the trolley during operation and maintenance work includes: checking that the plum blossom contact 8, frame 3 and electric grounding knife 6 have no abnormal deformation and foreign matter attached; checking that the surface of the contact arm 7 and voltage sensor 5 has no damage or cracks, and that the power frequency withstand voltage between phases and to the ground has no breakdown and flashover; turning on the remote control 11, so that it can run electrically from the test position to the working position, and can complete the return action. Before each electrical testing and grounding, it is necessary to confirm in advance that the remote control operation of the trolley is correct.

[0050] In summary, the present invention provides a remote-controlled switch cabinet electrical testing and grounding trolley device and a control method thereof, which solves the current risk of electric shock to electrical testing and maintenance personnel due to live busbars during switch cabinet maintenance. The present invention integrates electrical testing and grounding on a trolley, and through the application of automation and intelligent technologies, greatly improves work efficiency while reducing the risk of human operational errors. Relevant operations are carried out by remotely controlling the trolley to ensure the personal safety of operators. The redundant design of dual electrical testing voltage sensors ensures the accuracy and reliability of equipment electrical testing. The present invention has a complete operation control locking logic, which ensures the standardized execution of operations and avoids damage to personnel and equipment caused by misoperation to a certain extent.

[0051] Finally, it should be noted that the above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the specification and described above, and any equivalent changes, modifications and evolutions made by using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A trolley device for testing the electrical grounding of a remote-controlled switch cabinet, characterized in that: The vehicle device comprises an electric vehicle and a remote control operating component configured on the electric vehicle; wherein: The electric trolley comprises an electric chassis (3) and a trolley frame (4) arranged thereon, the trolley frame (4) being provided with a voltage sensing component and a grounding actuator component, and the remote control operating component being able to control the grounding actuator component to perform the electric testing and grounding actions of the electric trolley by means of the electric chassis (3) and the trolley frame (4); The remote control operation component comprises a controller (9) and a remote controller (11), wherein the controller (9) is arranged on the electric vehicle, and the remote controller (11) is arranged outside the electric vehicle; the remote controller (11) is capable of exchanging data with the controller (9) through wireless transmission; The voltage sensing assembly comprises a three-phase contact assembly and two voltage sensors (5) configured for each phase contact assembly. The voltage sensing assembly is used to detect and display the energized state of the busbar of the grounding switch cabinet to be tested and upload it to the controller (9). The remote controller (11) can control the grounding action of the busbar of the grounding switch cabinet to be tested when the controller (9) determines that both voltage sensors (5) detect no voltage signal.

2. The trolley device for testing the electrical grounding of a remote-controlled switch cabinet according to claim 1 is characterized in that: The voltage sensing assembly is also provided with a live display (1). The three-phase contact assembly can be in contact with the busbar of the switch cabinet to be tested. Each of the voltage sensors (5) can transmit the live state of the busbar of the switch cabinet to be tested to the controller (9). The controller (9) determines whether the busbar of the switch cabinet to be tested is live based on the voltage signal, and then displays the result through the live display (1) and the remote controller (11).

3. The trolley device for testing the electrical grounding of a remote-controlled switch cabinet according to claim 2 is characterized in that: The contact assembly comprises at least one contact arm (7) and a plum blossom contact (8) arranged at one end of the contact arm (7); the other end of the contact arm (7) is connected to the trolley frame (4); and the voltage sensor (5) is arranged on the contact arm (7).

4. The trolley device for testing the electrical grounding of a remote-controlled switch cabinet according to claim 2 is characterized in that: The two voltage sensors (5) are both arranged on the contact assembly; when all the voltage sensors (5) detect no voltage signal, the controller (9) determines that the busbar of the switch cabinet to be tested is not energized and a grounding operation can be performed; when any one of the voltage sensors (5) detects a voltage signal, the controller (9) determines that the busbar of the switch cabinet to be tested is energized and a grounding operation cannot be performed.

5. The trolley device for testing the electrical grounding of a remote-controlled switch cabinet according to claim 3 is characterized in that: The grounding execution component comprises an electric grounding knife (6) and a grounding knife status indicator (2); the electric grounding knife (6) is controlled by a remote control operation component to perform grounding closing and grounding opening actions; and the grounding knife status indicator (2) is used to display the action status of the electric grounding knife (6).

6. The trolley device for testing the electrical grounding of a remote-controlled switch cabinet according to claim 1 is characterized in that: The controller (9) comprises an external signal acquisition module, a status indication module, a main controller module, a power module, a wireless unit and antenna module, an electric trolley module and an electric ground knife module; The external signal acquisition module is used to collect external signals based on the electric trolley; the electric trolley module and the electric ground knife module are used to control the control drive unit of the electric trolley; the main controller module is used to analyze and process the received data and then issue instructions to control the trolley device; the power supply module is used to provide power; the status indication module is used to display the status of the trolley device in real time.

7. The trolley device for testing the electrical grounding of a remote-controlled switch cabinet according to claim 6 is characterized in that: The wireless unit and the antenna module are used to realize wireless data exchange and transmission between the controller (9) and the remote controller (11), and the wireless unit and the antenna module adopt Lora transmission.

8. The trolley device for testing the electrical grounding of a remote-controlled switch cabinet according to claim 6 is characterized in that: The controller (9) further comprises a current limiting detection module, which is used to monitor the current signal of the trolley device in real time during operation and transmit the current signal to the main controller module. The main controller module analyzes the operation status of the trolley device according to the current signal and determines whether to continue to operate the trolley device according to the operation status.

9. The trolley device for testing the electrical grounding of a remote-controlled switch cabinet according to claim 6 is characterized in that: The remote controller (11) comprises a main remote controller module, a power management module, a human-machine interaction module, a wireless unit and an antenna module; the main remote controller module is used for human-machine interaction display and operation, and the wireless unit, the antenna module and the power management module are used for data collection, analysis and processing; the wireless unit and the antenna module are used for realizing wireless data exchange between the controller (9) and the remote controller (11); the power management module is used for controlling the battery of the remote controller (11); and the human-machine interaction module is used for providing a display carrier and an operation carrier.

10. A method for controlling a trolley device for testing electrical grounding of a remote-controlled switch cabinet according to any one of claims 1 to 9, characterized in that: The steps include: Place the trolley device into the substation transfer trolley, push the transfer trolley into the trolley room, connect the transfer trolley with the switch cabinet connector, and adjust and confirm the test position; Turning on the power supply of the trolley device and the remote controller (11), remotely controlling the trolley device through the remote controller (11), completing the self-check and confirming that the function of the voltage sensing component is effective, and then remotely controlling the electric chassis vehicle (3) so that the electric chassis vehicle (3) moves from the test position to the working position, thereby completing the warehouse entry action; The voltage sensing component is used to determine whether the busbar of the switch cabinet to be tested is energized. The determination result is displayed on the remote controller (11). If any phase is detected to be energized, the remote control operation is locked and the grounding actuator is not started. After the busbar of the switch cabinet to be tested meets the no-power judgment, the grounding actuator of the trolley is controlled by the remote controller (11) to perform an electric closing operation; After the inspection and maintenance work is completed, the grounding actuator is operated by the remote controller (11) to separate the grounding switch, thereby starting the retraction action and causing the electric trolley to retract from the working position to the test position.

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