Ice melting access device for power transmission line

Abstract

The embodiment of the invention provides a power transmission line ice melting access device. The device comprises a control unit, a wire inlet unit, a rectification unit and an output unit, the wire inlet unit is connected with a power supply facility and used for receiving alternating current output by the power supply facility; the rectification unit is respectively connected with the wire inlet unit and the output unit and is used for converting alternating current into direct current; the output unit is used for being connected with a to-be-accessed power transmission line and inputting direct current into the power transmission line; the output unit comprises a quick connection terminal used for being connected with a power transmission line, the quick connection terminal comprises insulation clamping arms which are oppositely arranged, and elastic contact pieces used for being connected with the power transmission line are arranged on the opposite side faces of the insulation clamping arms. The elastic contact piece is electrically connected with the rectification unit and is used for transmitting the direct current output by the rectification unit. The method is used for solving the problems of complex operation and low access efficiency of an ice melting access device in the related technology.

Description

Technical Field

[0001] This application relates to the technical field of power grids, and particularly to a de-icing access device for transmission lines. Background Art

[0002] In cold regions, icing on power lines easily occurs, increasing the weight of the lines, leading to accidents such as pole tilt, collapse, and conductor breakage, seriously affecting the safety of the power grid. Currently, the commonly used de-icing method is the current de-icing method, which melts the ice layer by passing a large current through the line to utilize the thermal effect. However, when a mobile generator is used for AC de-icing, the connection problem between the generator and the 10kV line is relatively difficult to solve because there is a lack of a standardized interface between the de-icing device and the transmission line, resulting in low access efficiency, affecting the de-icing efficiency and bringing potential safety hazards.

[0003] In the prior art, the structures and connection methods of the mainly used de-icing access devices require a large amount of manual wiring and debugging, with complex operations, long access times, difficult to meet the rapid de-icing requirements, affecting the de-icing effect and potentially threatening the safety of operators. Summary of the Invention

[0004] An embodiment of this application provides a de-icing access device for a transmission line to solve the problems of complex operation and low access efficiency of the de-icing access device in the related art.

[0005] In a first aspect, an embodiment of this application provides a de-icing access device for a transmission line, including:

[0006] A control unit, an incoming line unit, a rectification unit, and an output unit;

[0007] The incoming line unit is connected to a power supply facility and is used to receive the alternating current output by the power supply facility; the rectification unit is respectively connected to the incoming line unit and the output unit, and the rectification unit is used to convert the alternating current into direct current; the output unit is used to be connected to the transmission line to be accessed and input the direct current into the transmission line; the control unit is respectively connected to the incoming line unit, the rectification unit, and the output unit.

[0008] The output unit includes a quick connection terminal for connecting to the transmission line. The quick connection terminal includes oppositely arranged insulating clamping arms, and elastic contact pieces for connecting to the transmission line are arranged on the opposite sides of the insulating clamping arms; the elastic contact pieces are electrically connected to the rectification unit and are used to transmit the direct current output by the rectification unit.

[0009] A locking mechanism is arranged at the end of the insulating clamping arm, and the locking mechanism is connected to the control unit. The control unit is used to control the locking mechanism to perform a locking action or a separating action.

[0010] In a possible implementation, there are two insulating clamping arms. One end of the two insulating clamping arms where the locking mechanism is provided is connected to each other through the locking mechanism, and the ends of the insulating clamping arms deviating from the locking mechanism are hinged to each other; or, a set of mutually cooperating locking mechanisms are respectively provided at both ends of the two insulating clamping arms, and each end of the insulating clamping arm is connected to the corresponding end of the other insulating clamping arm through the mutually cooperating locking mechanisms.

[0011] In a possible implementation, arc-shaped grooves are provided on the opposite sides of the insulating clamping arms, and the elastic contact pieces are arranged in the arc-shaped grooves; a damping buffer layer is provided between the elastic contact pieces and the clamping arms, and at least two sets of compression springs are arranged in the damping buffer layer corresponding to each elastic contact piece.

[0012] In a possible implementation, there are at least three elastic contact pieces connected to each insulating clamping arm, and the elastic contact pieces are arranged at relative angles; the elastic contact pieces are strip-shaped perpendicular to the insulating clamping arms, a hemispherical limiting block for connecting to the power transmission line is provided at one end of the elastic contact piece, and an arc-shaped flange for connecting to the power transmission line is provided at the end of the elastic contact piece deviating from the hemispherical limiting block.

[0013] In a possible implementation, the locking mechanism is an electromagnetic clutch connected to the control unit, and both ends of the electromagnetic clutch are respectively arranged at the end parts of the opposite sides of the insulating clamping arms; or, the locking mechanism includes a quick clamp and an electromagnetic clutch connected to the control unit, the quick clamp includes a snap-type clamp and a buckle that cooperate with each other, and the snap-type clamp and the buckle are respectively arranged on the end faces of the two insulating clamping arms.

[0014] In a possible implementation, the output unit includes a DC output bus connected to the quick connection terminal, and a DC circuit breaker is arranged on the DC output bus.

[0015] In a possible implementation, the incoming line unit includes an incoming line switch, a current transformer and an incoming line cable. The incoming line switch and the current transformer are respectively connected to the control unit, the incoming line switch and the current transformer are respectively arranged on the incoming line cable, and the incoming line cable is connected to the power supply facility through a quick plug-in connector.

[0016] In a possible implementation, the rectification unit includes a rectifier respectively connected to the incoming line cable and the DC output bus, the rectifier is electrically connected to the control unit, and a heat dissipation device is arranged on the rectifier.

[0017] In a possible implementation, the control unit includes a controller connected to the incoming line unit, the rectification unit and the output unit. The controller is also connected to the incoming line switch through a protection relay, and the controller is used to control the working states of the incoming line switch, the rectifier, the locking mechanism and the protection relay.

[0018] In a possible implementation, the ice melting access device further includes a monitoring and display unit connected to the controller, and the monitoring and display unit includes a display screen and an indicator light.

[0019] The transmission line ice melting access device provided by the embodiment of the present application is set as a combination of an incoming line unit, a rectifying unit, and an output unit, so as to access a power supply facility that needs to output alternating current, such as an alternating current power grid or other power supply facilities, through the incoming line unit. The rectifying unit rectifies the current output by the corresponding power supply facility to modulate it into a current with specified parameters, so that it can be better output to the transmission line to be ice-melted. By setting a quick connection terminal in the output unit to connect with the transmission line, the quick docking with different models of transmission lines and their busbars is realized by using an elastic contact piece. The quick connection terminal and the transmission line are quickly fixed by using a locking mechanism controlled by a control unit, and the fixing process can be automatically completed by electric control. Therefore, through the transmission line ice melting access device provided by this solution, the adaptation and connection with the transmission line can be completed quickly and efficiently, and the fixing with the transmission line can be automatically completed. The operation is simple, and the access efficiency from the power supply facility to the transmission line can be significantly improved, thereby improving the ice melting efficiency of the transmission line. Description of the Drawings

[0020] The drawings here are incorporated into the description and form a part of this description, showing embodiments consistent with the present application, and are used together with the description to explain the principles of the present application.

[0021] Figure 1 It is a scenario diagram of a transmission line ice melting device in the prior art provided by the embodiment of the present disclosure;

[0022] Figure 2 It is a schematic structural diagram of a transmission line ice melting access device provided by an embodiment of the present disclosure;

[0023] Figure 3 It is a schematic structural diagram of a quick connection terminal provided by the present application;

[0024] Figure 4 It is a schematic diagram of the cooperation relationship between the elastic contact piece and the arc-shaped groove provided by the present application;

[0025] Figure 5 It is a schematic diagram of the overall connection relationship of the transmission line ice melting access device provided by the present application;

[0026] Figure 6 It is a flowchart of an ice melting processing method based on the ice melting access device.

[0027] Among them, 100, ice melting device; 110, power supply facility; 120, transmission line;

[0028] 200. Ice melting access device, 210. Control unit, 211. Controller, 212. Protection relay, 213. Sensor, 220. Incoming line unit, 221. Incoming line switch, 222. Current transformer, 223. Incoming line cable, 224. Quick plug - in connector, 230. Rectification unit, 231. Rectifier, 232. Heat dissipation device, 240. Output unit, 241. DC output bus, 242. DC circuit breaker, 250. Monitoring and display unit, 251. Display screen, 252. Indicator lamp;

[0029] 300. Quick connection terminal, 310. Insulating clamping arm, 311. Arc - shaped groove, 312. Damping buffer layer, 313. Compression spring, 320. Elastic contact piece, 321. Hemispherical limit block, 322. Arc - shaped flange, 330. Locking mechanism, 331. Buckle - type clamp, 332. Buckle.

[0030] Through the above - mentioned drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and written descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0031] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0032] In cold regions, icing on power lines is likely to occur, increasing the weight of the lines, leading to accidents such as pole tilt, collapse, and wire breakage, seriously affecting the safety of the power grid. Currently, the commonly used ice - melting method is the current ice - melting method, which melts the ice layer by passing a large current through the part of the transmission line that needs ice - melting treatment and utilizing the thermal effect of the current heating the resistance. However, before the commonly used mobile generator in the existing ice - melting device conducts AC ice - melting, it is necessary to connect the generator to the transmission line to be ice - melted (such as a 10 kV transmission line). However, due to the lack of a standardized interface between the ice - melting device and the transmission line, the connection between the generator and the transmission line is difficult. It requires staff to manually complete the connection between the generator and the transmission line, resulting in low access efficiency, which in turn affects the ice - melting efficiency, and manual operation also brings safety hazards.

[0033] In the prior art, the structure and connection method of the ice melting access device mainly used are to complete the fixed connection between the ice melting access device and the transmission line through manual wiring. This process requires a large amount of manual wiring and debugging to ensure that power can be successfully supplied to the transmission line. However, the process is complex in operation and slow in access speed. It often takes a long time from preparation to the start of ice melting operation. In the case of severe icing, every minute of delay may increase the risk of line damage. At the same time, this method has poor adaptability because different power lines vary in voltage level, specification size, etc. It is difficult for existing access devices to quickly adapt to different lines, and it is necessary to modify or replace some components according to different situations, increasing the cost and operation difficulty. In addition, there is also the problem of low safety and reliability. Because some access devices have problems in terms of connection firmness, electrical insulation performance, etc., they are prone to failures during the ice melting process, affecting the ice melting effect and even posing a safety threat to operators and equipment.

[0034] The ice melting access device for transmission lines provided by this application solves the problem of difficult connection between the ice melting access device and the transmission line to be de-iced by setting quick connection terminals. It is connected to the transmission line and its busbar through elastic contact pieces, and the quick connection terminals are quickly fixed through a locking mechanism. Through the cooperation of the incoming line unit and the rectifying unit, the quick, efficient, and automated connection and fixation between the ice melting access device and the transmission line are realized, reducing the operation difficulty, improving the access efficiency, and further enhancing the ice melting efficiency.

[0035] Figure 1 As shown in the schematic diagram of the application scenario of the ice melting access device for transmission lines provided by this application, Figure 1 As shown, the specific application scenario of this application is: during the ice melting process, it is necessary to first connect the ice melting device 100 to the power supply facility 110 and the transmission line 120 to be de-iced respectively. The operation process requires repeated debugging and has low efficiency.

[0036] It should be noted that, Figure 1 In the shown scenario, the ice melting device, power supply facility, and transmission line are only exemplified by one or a specific number, but this disclosure is not limited thereto. That is to say, the number of ice melting devices, power supply facilities, and transmission lines can be arbitrary.

[0037] The technical solution of this application and how this technical solution solves the above technical problems will be described in detail below with specific embodiments. These several specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of this application will be described below with reference to the drawings.

[0038] Figure 2 Schematic diagram of the structure of the ice melting access device for transmission lines provided by this applicationFigure 1 , as Figure 2 shown, the ice melting access device 200 for the transmission line includes:

[0039] a control unit 210, an incoming line unit 220, a rectifying unit 230, and an output unit 240;

[0040] The incoming line unit 220 is connected to the power supply facility 110 and is used to receive the alternating current output by the power supply facility 110; the rectifying unit 230 is respectively connected to the incoming line unit 220 and the output unit 230, and the rectifying unit 240 is used to convert the alternating current into direct current; the output unit 240 is used to be connected to the transmission line 120 to be accessed and input the direct current into the transmission line 120; the control unit 210 is respectively connected to the incoming line unit 220, the rectifying unit 230, and the output unit 240;

[0041] The output unit 240 includes a quick connection terminal 300 for connecting to the transmission line 120. The quick connection terminal 300 includes insulating clamping arms 310 arranged oppositely. Elastic contact pieces 320 for connecting to the transmission line 120 are arranged on the opposite sides of the insulating clamping arms 310; the elastic contact pieces 320 are electrically connected to the rectifying unit 230 and are used to transmit the direct current output by the rectifying unit 230;

[0042] A locking mechanism 330 is arranged at the end of the insulating clamping arm 310. The locking mechanism 330 is connected to the control unit 210, and the control unit 210 is used to control the locking mechanism 330 to perform a locking action or a separating action.

[0043] Specifically, this embodiment is used to generally describe the main structure of the ice melting access device 200 and the principle of realizing vibration monitoring.

[0044] In this embodiment, the principle of the ice melting access device 200 to realize the connection between the power supply facility 110 and the transmission line 120 is that the incoming line unit 220 accesses the power supply facility 110, converts the current generated by the power supply facility 110 into direct current under specified parameters through the rectifying unit 230, then outputs it to the transmission line 120 through the output unit 240, and controls this current transmission process through the control unit 210. By passing current into the transmission line 120 and using the thermal effect to heat the transmission line 120, ice melting treatment is realized.

[0045] In the above structure, the incoming line unit 220 is responsible for connecting the power supply facility 110 (such as an AC power grid, a mobile generator, etc.) and measuring the incoming line current input through the power supply facility 110 (by measuring the parameters of the incoming line current, such as the current value, so as to perform conversion on it through the rectifying unit 230), and introducing power for the ice melting access device 200 of the transmission line.

[0046] The rectifying unit 230 is used to convert alternating current (the current generated in the power supply facility 110 is usually alternating current, but in practical applications, the rectifying unit 230 can also convert direct current and convert it into direct current with a specified voltage / current) into direct current and can adjust the output parameters.

[0047] The output unit 240 is used to output direct current to the power transmission line 120 that needs to be de-iced and is connected.

[0048] In addition, the control unit 210 is used to monitor the operating parameters corresponding to structures such as the incoming line unit 220 and the rectifying unit 230, so as to regulate the conversion process of the rectifying unit 230 for the current, and protect the power transmission line de-icing access device 200 and the de-icing power transmission line 120 in case of abnormalities (for example, by controlling the switch structure or circuit breaker and other structures arranged in the incoming line unit 220, the circuit can be disconnected when necessary to achieve the protection of the de-icing access device 200 and the power transmission line 120).

[0049] Furthermore, in the above structure, the output unit 240 adopts a unique structural design. By cooperating the elastic contact piece 320 with the locking mechanism 330, it can adapt to power lines and busbars of different specifications and shapes. When connected to a line or a busbar, the elastic contact piece 320 can automatically adapt to different sizes to ensure good electrical contact; the locking mechanism 330 is quickly locked manually or electrically to ensure the firmness of the connection (its specific structure will be further described in the subsequent embodiments).

[0050] At the same time, the quick connection terminal 300 has good insulation performance by arranging the insulating clamping arm 310, which can effectively prevent electric shock accidents, thus ensuring the safety of the access process and the de-icing process.

[0051] The power transmission line de-icing access device provided by the embodiment of the present application combines the power transmission line de-icing access device into an incoming line unit, a rectifying unit and an output unit, so as to use the incoming line unit to access the power supply facility that needs to output alternating current, rectify the current output by the corresponding power supply facility through the rectifying unit to modulate it into a current with specified parameters, so that it can be better output to the power transmission line to be de-iced. By setting a quick connection terminal in the output unit to connect with the power transmission line, the elastic contact piece is used to achieve quick docking with power transmission lines and their busbars of different models, and the locking mechanism controlled by the control unit is used to achieve quick fixation of the quick connection terminal and the power transmission line, and the fixation process can be automatically completed through electric control. Therefore, through the power transmission line de-icing access device provided by this solution, the adaptation and connection with the power transmission line can be completed quickly and efficiently, and the fixation with the power transmission line can be automatically completed, with simple operation, and can significantly improve the access efficiency from the power supply facility to the power transmission line, and further improve the de-icing efficiency of the power transmission line.

[0052] Figure 3 Schematic structural diagram of the quick connection terminal provided for this application Figure 4 Schematic diagram of the cooperation relationship between the elastic contact piece and the arc-shaped groove provided for this application Figure 5 Schematic diagram of the overall connection relationship provided for this application, as Figures 3 to 5 shown, in this embodiment, on the basis of the Figure 2 embodiment, in combination with Figures 2 to 5 , the specific structural composition of the transmission line ice melting access device 200 and the specific process of realizing quick access and ice melting treatment are described in detail. On the basis of the structure in the Figure 2 shown embodiment, this device further includes:

[0053] There are two insulating clamping arms 310. One end of the two insulating clamping arms 310 provided with the locking mechanism 330 is connected to each other through the locking mechanism 330, and the ends of the insulating clamping arms 310 deviating from the locking mechanism 330 are hinged to each other; alternatively, a set of mutually cooperating locking mechanisms 330 are respectively provided at both ends of the two insulating clamping arms 310, and each end of the insulating clamping arm 310 is connected to the corresponding end of the other insulating clamping arm 310 through the mutually cooperating locking mechanisms 330.

[0054] Specifically, as Figure 3 shown, the elastic contact piece 320 and the locking mechanism 330 are installed through the insulating clamping arm 310. During use, the staff usually contacts the insulating clamping arm 310 to control the quick connection terminal 300. Therefore, the insulating clamping arm 310 is set to two and fixedly connected to each other through the locking mechanism 330 to facilitate the connection between the quick connection terminal 300 and the transmission line 120 and at the same time facilitate the staff to use; in practical applications, in addition to the scheme of connecting through the locking mechanism 330 on one side, mutually cooperating locking mechanisms 330 can also be provided at both ends of the insulating clamping arm 310, and then the fixing of both ends of the insulating clamping arm 310 is respectively realized through the locking mechanisms 330 at both ends.

[0055] Compared with the scheme of fixing on one side through the locking mechanism 330 and hinging on the other side through a hinge, the flexibility of the movement and storage of the insulating clamping arm 310 when not connected to the transmission line 120 can be enhanced (because the locking mechanisms 330 on both sides can be unlocked, and then each insulating clamping arm 310 can be stored separately, instead of placing the whole structure together).

[0056] In some embodiments, arc-shaped grooves 311 are provided on the opposite sides of the insulating clamping arm 310, and the elastic contact piece 320 is arranged in the arc-shaped grooves 311; a damping buffer layer 312 is arranged between the elastic contact piece 320 and the clamping arm, and at least two groups of compression springs 313 are arranged in the damping buffer layer 312 corresponding to each elastic contact piece 320.

[0057] Specifically, by providing the arc-shaped groove 311, the power transmission line 120 is placed inside the arc-shaped groove 311, and through the connection of the elastic contact piece 320 with the power transmission line 120, the quick connection between the quick connection terminal 300 and the power transmission line 120 is achieved.

[0058] By providing the damping buffer layer 312 and the compression spring 313 in cooperation, the elastic contact piece 320 can move within a certain range relative to the insulating clamping arm 310. When the elastic contact piece 320 is connected to power transmission lines 120 of different sizes, by squeezing the compression spring 313 and the damping buffer layer 312, the effective contact between the elastic contact piece 320 and the power transmission line 120 is ensured, so that the elastic contact piece 320 can cooperate with power transmission lines 120 of different shapes and specifications, and the applicable range of the quick connection terminal 300 is improved.

[0059] In some embodiments, there are at least three elastic contact pieces 320 connected to each insulating clamping arm 310, and the elastic contact pieces 320 are arranged at relative angles; the elastic contact piece 320 is in the shape of a long strip perpendicular to the insulating clamping arm 310. One end of the elastic contact piece 320 is provided with a hemispherical limiting block 321 for connecting with the power transmission line 120, and the end of the elastic contact piece 320 deviating from the hemispherical limiting block 321 is provided with an arc-shaped flange 322 for connecting with the power transmission line 120.

[0060] Specifically, as Figure 3 and Figure 4 shown, by providing a plurality of elastic contact pieces 320, the elastic contact pieces 320 are made to fit the power transmission line 120 (or its bus bar) from different angles, and through the combination of a plurality of elastic contact pieces 320, the connection and fixation of the power transmission line 120 are realized from multiple angles, thus fully ensuring the stability of the fixed connection of the power transmission line 120.

[0061] By providing the cooperation of the hemispherical limiting block 321 and the arc-shaped flange 322, through the combination of arc-shaped / curved surface structures of different shapes, it is ensured that each elastic contact piece 320 can have multiple points (at least two points, such as the vertices of the hemispherical limiting block 321 and the arc-shaped flange 322) capable of connecting with the power transmission line 120, so as to adapt to power transmission lines 120 of different shapes as much as possible (for example, some power transmission line bus bars are in the shape of a groove and some are in the shape of a rectangle, and it is difficult for conventional connection structures to adapt), and the stability and reliability of the connection are ensured.

[0062] In some embodiments, the locking mechanism 330 is an electromagnetic clutch connected to the control unit 210, and both ends of the electromagnetic clutch are respectively arranged at the opposite side ends of the insulating clamping arm 310; alternatively, the locking mechanism 330 includes a quick clamp and an electromagnetic clutch connected to the control unit 210. The quick clamp includes a snap-type clamp 331 and a snap 332 that cooperate with each other, and the snap-type clamp 331 and the snap 332 are respectively arranged on the end faces of the two insulating clamping arms 310.

[0063] Specifically, as Figure 3 shown, by setting the electromagnetic clutch (i.e., the structure referred to as 330 in Figure 3 ) to be in a cooperative relationship with the control unit 210, electric control over the connection and disconnection states of the locking mechanism 330 is achieved through the control unit 210. The control unit 210 can send instructions to achieve the connection and disconnection of the electromagnetic clutch, so that the locking and unlocking of the quick connection terminal 300 can be completed quickly without manual operation; by additionally setting the combination of the snap-type clamp 331 and the snap 332, the locking mechanism 330 can be fixed manually. Through the cooperation of the two methods, the fixing effect of the locking mechanism 330 is ensured in case of abnormalities in the electromagnetic clutch, thereby ensuring the stability and safety of the connection of the quick connection terminal 300.

[0064] In some embodiments, the output unit 240 includes a DC output bus 241 connected to the quick connection terminal 300, and a DC circuit breaker 242 is arranged on the DC output bus 241.

[0065] Specifically, referring to Figure 5 , the DC output bus 241 can adopt a copper bar or an aluminum bar with high conductivity to ensure the efficiency and stability of current transmission. The surface of the bus is subjected to anti-corrosion treatment to improve its service life.

[0066] The DC circuit breaker 242 can be a DC circuit breaker with fast switching characteristics and reliable protection functions, which is used to quickly cut off the DC circuit in case of faults such as short circuits and overcurrents to protect the safety of the device and the line.

[0067] In some embodiments, the incoming line unit 220 includes an incoming line switch 221, a current transformer 222, and an incoming line cable 223. The incoming line switch 221 and the current transformer 222 are respectively connected to the control unit 210. The incoming line switch 221 and the current transformer 222 are respectively arranged on the incoming line cable 223, and the incoming line cable 223 is connected to the power supply facility 110 through a quick plug connector 224.

[0068] Specifically, the incoming line switch 221 can be a high-performance load switch or circuit breaker, which has the ability of quick switching on and off and high short-circuit breaking capacity. The operating mechanism of the incoming line switch 221 adopts an electric or pneumatic mode and is opened or closed through the instruction of the control unit 210, so as to realize remote control and ensure that the circuit can be quickly cut off in case of emergency.

[0069] The current transformer 222 is used to accurately measure the incoming line current. A high-precision and wide-range current transformer is adopted, and its output signal is transmitted to the control and protection unit to provide accurate data support for subsequent control and protection. The incoming line cable 223 can be selected with a suitable specification to have good electrical performance and mechanical performance and be able to withstand large current and tension. The connection mode between the incoming line cable 223 and the power supply facility 110 adopts a quick pluggable joint 224, which is convenient for quick connection and disconnection with the power supply facility 110 (such as the power grid or mobile generator).

[0070] In some embodiments, the rectification unit 230 includes a rectifier 231 respectively connected to the incoming line cable 223 and the DC output bus 241. The rectifier 231 is electrically connected to the control unit 210, and a heat dissipation device 232 is arranged on the rectifier 231.

[0071] Specifically, the rectifier 231 can adopt an advanced thyristor rectifier or IGBT rectifier, so as to efficiently convert the alternating current input by power supply facilities 110 such as the power grid into direct current. The rectifier 231 has precise voltage and current regulation functions and can flexibly adjust the output parameters according to different de-icing requirements according to the instruction of the control unit 210.

[0072] To ensure the stability of the rectifier 231 during long-term operation, an efficient heat dissipation device 232 such as a cooling fan or heat sink can be equipped for it. The heat dissipation device 232 is connected to the control unit 210 to monitor the temperature of the rectifier 231 through the control unit 210. When the temperature of the rectifier 231 is relatively high, an instruction is sent to the heat dissipation device 232, so as to automatically adjust the heat dissipation intensity of the heat dissipation device 232.

[0073] In some embodiments, the control unit 210 includes a controller 211 connected to the incoming line unit 220, the rectification unit 230 and the output unit 240. The controller 211 is also connected to the incoming line switch 221 through a protection relay 212. The controller 211 is used to control the working states of the incoming line switch 221, the rectifier 231, the locking mechanism 330 and the protection relay 212.

[0074] Specifically, the controller 211 can adopt an advanced microprocessor or PLC to meet the data processing ability and control functions required in the de-icing process.

[0075] The controller 211 sets sensors 213 at structures such as the incoming line switch 221, rectifier 231, and DC output bus 241 to collect parameters such as incoming line current, output voltage, and current, so as to adjust the output of the rectification unit 230 in real time according to the preset ice melting strategy and cut off the circuit when necessary to ensure the efficiency and safety of the ice melting process.

[0076] Multiple protection relays 212 such as overcurrent, overvoltage, undervoltage, and overheat protection relays can be set in the system. When an abnormal situation occurs in the device, the corresponding circuit can be quickly cut off through the protection relay 212 to prevent equipment damage and the expansion of accidents.

[0077] The above-mentioned sensors 213 specifically include various sensors such as current sensors, voltage sensors, and temperature sensors to monitor the operating parameters of the device in real time. The output signals of the sensors 213 are transmitted to the controller 211 to provide accurate data basis for control and protection.

[0078] In some embodiments, the ice melting access device 200 further includes a monitoring and display unit 250 connected to the controller 211. The monitoring and display unit 250 includes a display screen 251 and indicator lights 252.

[0079] Specifically, for the convenience of monitoring and controlling the ice melting access device 200, a monitoring and display unit 250 can also be set.

[0080] Among them, the display screen 251 uses a high-definition liquid crystal display screen, which can display the operating status, output voltage, current, temperature and other parameters of the device in real time.

[0081] According to actual needs, the display screen 251 can also have a touch operation function, and the operator can set parameters, perform operation control, etc. by touching the screen.

[0082] By additionally setting a variety of indicator lights 252, such as operating indicator lights, fault indicator lights, alarm indicator lights, etc., to intuitively indicate the working status of the device and facilitate the operator to quickly judge whether there is an abnormality in the device. The indicator lights 252 can be connected to the controller 211 and / or the corresponding structure to give feedback according to the values monitored by the controller 211 or the status of the corresponding device. The indicator lights 252 can use high-brightness and long-life LED lights to ensure clear visibility in different environments.

[0083] The ice melting access device provided by the embodiment of the present application maximizes the rapid and effective connection with transmission lines of different specifications and sizes by setting the quick connection terminal as a structure that cooperates with multiple elastic contact pieces, a damping buffer layer, a compression spring, an insulating clamping arm, and a locking mechanism. By setting corresponding cooperation structures in the output unit, the incoming line unit, the rectifying unit, the control unit, and the monitoring and display unit, the ice melting access device is maximally guaranteed to be quickly connected to the transmission line and the ice melting process is efficiently completed.

[0084] Based on the above structure, as Figure 6 shown, it is a flowchart of the ice melting process method based on the ice melting access device. Based on Figure 6 , the following briefly describes the operation steps of the ice melting access device 200 in actual application:

[0085] S610. Connect the incoming line unit to the power supply facility and connect the output unit to the transmission line.

[0086] Specifically, in the preparation stage, the operator first reliably connects the incoming line cable 223 of the incoming line unit 220 to the power supply facility 110 through a quick pluggable connector 224, and at the same time connects the quick connection terminal 300 of the output unit 240 to the transmission line 120 or the busbar that needs to be de-iced.

[0087] During the connection process, the elastic contact pieces 320 of the quick connection terminal 300 automatically adapt to the size of the line or busbar. The operator controls the locking mechanism 330 by operating the locking mechanism 330 or through the display screen 251 via the controller 211 to quickly lock the quick connection terminal 300 to ensure a firm connection.

[0088] S620. The control unit sends a start command to the incoming line unit and the rectifying unit.

[0089] Among them, the start command is used to instruct the incoming line unit and the rectifying unit to switch to the state of input current.

[0090] Specifically, after the controller 211 of the control unit 210 detects that the device has been correctly connected (such as the locking mechanism 330 has completed the locking action), it sends a start command, the incoming line switch 221 closes, and the alternating current of the power supply facility 110 enters the rectifying unit 230 through the incoming line unit 220. The rectifying unit 230 converts the alternating current into direct current and adjusts the output voltage and current according to the preset ice melting parameters. The direct current is transmitted to the transmission line 120 or the busbar that needs to be de-iced through the output unit 240, and the ice layer is melted by the thermal effect of the current.

[0091] S630. The monitoring and display unit monitors and controls the ice melting state in real time.

[0092] Specifically, during the ice melting process, the control unit 210 monitors the operating parameters of the device in real time through the sensor 213, such as the incoming line current, output voltage, current, temperature, etc. The controller 211 adjusts the output of the rectifier unit 230 in real time according to the monitored data to ensure the stability and efficiency of the ice melting process.

[0093] If abnormal conditions occur, such as overcurrent, overvoltage, overheating, etc., the protection relay 212 acts quickly to cut off the corresponding circuit. At the same time, the display screen 251 and the indicator light 252 of the monitoring and display unit 250 send out fault alarm information to remind the operator to handle it.

[0094] S640. The control unit controls each unit to end the operation.

[0095] Specifically, when the ice melting operation is completed, the operator issues a stop command through the monitoring and display unit 250. The controller 211 controls the rectifier unit 230 to stop output, then disconnects the DC circuit breaker 242 and the incoming line switch 221, and finally separates the incoming line cable 223 and the quick connection terminal 300 from the power supply facility 110 and the transmission line 120 respectively to complete the ice melting process.

[0096] Furthermore, before the above process, the ice melting access device 200 also includes an assembly and commissioning process. The relevant content is briefly described below.

[0097] Assembly of the device:

[0098] Assembly of the incoming line unit 220: Install and connect the incoming line switch 221, current transformer 222, and incoming line cable 223 according to the design requirements. Note that the communication line between the operating mechanism of the incoming line switch 221 and the control unit 210 is correctly connected, and the installation position of the current transformer 222 should be convenient for accurately measuring the incoming line current.

[0099] Assembly of the rectifier unit 230: After installing the rectifier 231 and the heat dissipation device 232 together, place them in a suitable position and make electrical connections with the incoming line unit 220. The air duct of the heat dissipation device 232 should be kept unobstructed to ensure good heat dissipation effect. At the same time, connect the control circuit of the rectifier 231 to the control unit 210 to achieve precise control of the rectifier 231.

[0100] Assembly of the output unit 240: Install the DC output bus 241, DC circuit breaker 242, and quick connection terminal 300. The connection of the DC output bus 241 should be firm and the contact resistance should be small; the opening and closing characteristics of the DC circuit breaker 242 should be debugged to ensure its normal operation; the elastic contact piece 320 and the locking mechanism 330 of the quick connection terminal 300 should be inspected and debugged to ensure its flexible and reliable operation.

[0101] Assembly of the control unit 210: Install the controller 211, the protection relay 212, and the sensor 213 in the control box, and make electrical connections and communication line connections. The installation position of the sensor 213 should be able to accurately collect the operating parameters of the device, and the operating parameters of the protection relay 212 should be set according to the rated parameters of the device.

[0102] Assembly of the monitoring and display unit 250: Connect the display screen 251 and the indicator light 252 to the control unit 210. The display effect of the display screen 251 should be debugged to ensure that the operating parameters of the device can be clearly displayed; the brightness and color of the indicator light 252 should meet the design requirements and be able to accurately indicate the working state of the device.

[0103] The following is a brief description of the debugging process of the ice melting access device 200:

[0104] Electrical performance debugging: Power on the device for testing, and check whether the electrical performance of the incoming line unit 220, the rectification unit 230, and the output unit 240 is normal. Measure the incoming line voltage and current, the output voltage and current of the rectification unit 230, and the output parameters of the output unit 240 to ensure that they meet the design requirements.

[0105] Protection function debugging: Simulate abnormal conditions such as overcurrent, overvoltage, undervoltage, and overheating, and check the operation of the protection relay 212. The protection relay 212 should be able to act quickly, cut off the corresponding circuit, and send a fault alarm message in the monitoring and display unit 250.

[0106] Quick connection terminal debugging: Debug the connection performance of the quick connection terminal 300, check the elasticity and contact effect of the elastic contact piece 320, and the locking force and reliability of the locking mechanism 330. Ensure that the quick connection terminal 300 can achieve good electrical connection and firm mechanical connection with different specifications of lines and busbars.

[0107] Intelligent control debugging: Set different ice melting parameters through the monitoring and display unit 250, and check whether the adjustment function of the controller 211 for the rectification unit 230 is normal. The controller 211 should be able to adjust the output of the rectification unit 230 in real time according to the preset parameters to ensure the stability and efficiency of the ice melting process.

[0108] As can be shown by the above example, the ice melting access device provided by this solution significantly improves the efficiency and reliability of the ice melting process for transmission lines, and promotes the intelligent operation and maintenance of power equipment.

[0109] Those of ordinary skill in the art can understand that all or part of the steps for implementing the algorithms and other related content of the above embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps of the above method embodiments; and the aforementioned storage medium includes various media that can store program codes, such as ROM, RAM, magnetic disks, or optical discs.

[0110] Finally, it should be noted that: After considering the specification and practicing the invention disclosed herein, those skilled in the art will readily think of other embodiments of the present invention. The present invention is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include the common general knowledge or conventional technical means in the technical field not disclosed in the present invention. It is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A transmission line ice melting access device, characterized in that: include: Control unit, incoming line unit, rectifier unit and output unit; The incoming line unit is connected to the power supply facility and is used to receive the alternating current output by the power supply facility; The rectifier unit is connected to the incoming line unit and the output unit respectively, and the rectifier unit is used to convert alternating current into direct current; the output unit is used to connect to the power transmission line to be connected, and input direct current into the power transmission line; The control unit is connected to the incoming line unit, the rectifying unit and the output unit respectively; The output unit includes a quick connection terminal for connecting to a power transmission line, the quick connection terminal includes insulating clamping arms arranged opposite to each other, and the opposite sides of the insulating clamping arms are provided with elastic contact pieces for connecting to the power transmission line; the elastic contact pieces are electrically connected to the rectifier unit and are used to transmit the direct current output by the rectifier unit; A locking mechanism is provided at the end of the insulating clamping arm, and the locking mechanism is connected to a control unit, and the control unit is used to control the locking mechanism to perform a locking action or a separation action.

2. The device according to claim 1, characterized in that There are two insulating clamping arms, one end of the two insulating clamping arms provided with a locking mechanism is connected to each other through the locking mechanism, and the ends of the insulating clamping arms that deviate from the locking mechanism are hinged to each other; or, both ends of the two insulating clamping arms are respectively provided with a group of mutually cooperating locking mechanisms, and each end of the insulating clamping arm is connected to the corresponding end of the other insulating clamping arm through the mutually cooperating locking mechanisms.

3. The device according to claim 2, characterized in that The insulating clamping arm has an arc-shaped groove on its opposite side, and the elastic contact piece is arranged in the arc-shaped groove; A damping buffer layer is arranged between the elastic contact piece and the clamping arm, and at least two groups of compression springs are arranged in the damping buffer layer corresponding to each elastic contact piece.

4. The device according to claim 3, characterized in that There are at least three elastic contact pieces connected to each insulating clamping arm, and the elastic contact pieces are arranged at relative angles; The elastic contact piece is in the shape of a long strip perpendicular to the insulating clamping arm, one end of the elastic contact piece is provided with a hemispherical limit block for connecting with the transmission line, and the end of the elastic contact piece deviating from the hemispherical limit block is provided with an arc flange for connecting with the transmission line.

5. The device according to claim 2, characterized in that The locking mechanism is an electromagnetic clutch connected to the control unit, and the two ends of the electromagnetic clutch are respectively arranged at the side ends opposite to the insulating clamping arm; or, The locking mechanism comprises a quick clamp and an electromagnetic clutch connected to the control unit, the quick clamp comprises a snap-on clamp and a buckle that cooperate with each other, and the snap-on clamp and the buckle are respectively arranged on the end surfaces of two insulating clamping arms.

6. The device according to any one of claims 1 to 5, characterized in that The output unit comprises a DC output busbar connected to the quick connection terminal, and a DC circuit breaker is arranged on the DC output busbar.

7. The device according to claim 6, characterized in that The incoming line unit includes an incoming line switch, a current transformer and an incoming line cable. The incoming line switch and the current transformer are respectively connected to the control unit. The incoming line switch and the current transformer are respectively arranged on the incoming line cable, and the incoming line cable is connected to the power supply facility through a quick plug-in connector.

8. The device according to claim 7, characterized in that The rectifier unit comprises a rectifier connected to the incoming cable and the DC output busbar respectively, the rectifier is electrically connected to the control unit, and a heat dissipation device is arranged on the rectifier.

9. The device according to claim 8, characterized in that The control unit includes a controller connected to the incoming line unit, the rectifier unit and the output unit. The controller is also connected to the incoming line switch through a protection relay. The controller is used to control the working status of the incoming line switch, the rectifier, the locking mechanism and the protection relay.

10. The device according to claim 6, characterized in that The ice melting access device further comprises a monitoring and display unit connected to the controller, wherein the monitoring and display unit comprises a display screen and an indicator light.

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