Protective device for isolation baffle plate of fan converter

Abstract

The invention relates to the technical field of fan converters, and discloses a protection device for an isolation baffle of a fan converter. According to the protection device for the isolation baffle of the fan converter, an automatic detection and warning system is formed by combining physical locking of electromagnetic limiting, dynamic monitoring of vibration and real-time feedback, live-line accidents caused by illegal disassembly of the isolation baffle can be effectively prevented, and operation and maintenance standardability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine converters, and in particular to a protective device for an isolation baffle of a wind turbine converter. Background Art

[0002] The wind turbine converter, a core component of a wind power generation system, consists primarily of a grid-side power distribution cabinet, a generator-side power distribution cabinet, a grid-side power cabinet, and a generator-side power cabinet. During installation, the generator-side power distribution cabinet is directly connected to the wind turbine generator, allowing the generator-side power cabinet to convert the AC power generated by the generator into DC power. The grid-side power module then converts the DC power into three-phase AC power, which is then boosted by a box-type transformer for transmission to the grid. This ensures high-efficiency conversion and stable output of wind power, significantly improving grid-connected compatibility.

[0003] The three-phase copper busbars in the grid-side power distribution cabinet of the wind turbine converter are connected to the low-voltage side of the box-type transformer via cables. However, in actual use, the three-phase copper busbars in the grid-side power distribution cabinet of the wind turbine converter were exposed at the connection point with the cables, posing a risk of electric shock. Therefore, an isolation baffle has been installed. According to the wind turbine converter operating procedures, the low-voltage side of the box-type transformer must be powered off before removing the isolation baffle to inspect and repair the cables, grid-side circuit breakers, and other components.

[0004] However, due to the weak safety awareness of power operation and maintenance personnel, violation of operating procedures, or mistaken entry into live intervals, the illegal removal of isolation baffles without disconnecting the low-voltage circuit breaker of the box transformer often occurs. Summary of the Invention

[0005] In view of this, the present invention provides a protective device for an isolation baffle of a wind turbine converter to solve the problem of illegal disassembly of the isolation baffle.

[0006] Specifically, the present invention provides a protective device for an isolation baffle of a wind turbine converter, comprising a fixed base, wherein the fixed base is used to fix the isolation baffle at the connection between the three-phase copper busbar and the cable of the grid-side distribution module. The protective device also includes a protective pressure plate, an electromagnetic limit assembly, a vibration detection component, a warning component and a control terminal. Wherein, the electromagnetic limit assembly is installed on the fixed base, and the electromagnetic limit assembly has a first state in which the protective pressure plate is fixedly installed on the fixed base, and a second state in which the protective pressure plate is unlocked; the vibration detection component is installed on the protective pressure plate; the warning component is installed on the protective pressure plate; the control terminal is used to control the electromagnetic limit assembly to switch between the first state and the second state, the control terminal is communicated with the vibration detection component, and is used to receive the actual vibration value fed back by the vibration detection component, and the control terminal is provided with a vibration threshold, the control terminal is communicated with the warning component, and when the electromagnetic limit assembly is in the first state and the actual vibration value is greater than the vibration threshold, the control terminal generates a warning signal and transmits it to the warning component.

[0007] Beneficial effects: By setting up an electromagnetic limit component and a vibration detection component, when in use, if the low-voltage side of the box transformer is not powered off, the electromagnetic limit component is in the first state, fixing the protective pressure plate on the fixed base. If the operation and maintenance personnel forcibly remove the isolation baffle in violation of regulations, it will cause additional vibration of the protective pressure plate. At this time, the vibration detection component can capture the abnormal vibration value and feed it back to the control terminal, and compare the actual vibration value with the vibration threshold at the control terminal. If the vibration value exceeds the standard and the electromagnetic limit component is still in the first state, a warning signal is immediately generated and transmitted to the warning component, thereby triggering the warning component to issue an alarm. Compared with the traditional operation mode that relies on the safety awareness of operation and maintenance personnel, this protective device forms an automated detection and alarm system by combining the physical locking of the electromagnetic limit, dynamic monitoring of vibration, and real-time feedback. It can effectively prevent the occurrence of live electrical accidents caused by the illegal removal of isolation baffles and improve the standardization of operation and maintenance.

[0008] In an optional embodiment, the electromagnetic limit assembly includes an electromagnetic protection body and a protective cover. The electromagnetic protection body is mounted on the fixed base, the electromagnetic protection body defines a receiving chamber, and the receiving chamber has a first opening. The protective cover is slidably mounted on the first opening. The protective cover at least partially opens the first opening under the action of an external force, and closes the first opening under the action of a reset assembly after the external force is removed.

[0009] In an optional embodiment, the electromagnetic protection body is further provided with a fixed lock hole; the protection pressure plate is provided with a fixed lock core, and the fixed lock core is used to be installed in the fixed lock hole.

[0010] In an optional embodiment, the electromagnetic protection body is further provided with a mounting boss, the mounting boss is arranged in the accommodating chamber, the mounting boss is provided with a guide chamber, and the guide chamber is provided with a second opening; the reset assembly includes a limiter, a guide member and an elastic reset member. The limiter is installed at the second opening; the guide member is provided with a fixed end, a transition section and a movable end in sequence along its length direction, the fixed end is connected to the protective cover plate, the transition section is passed through the second opening, and the movable end is located inside the guide chamber; the elastic reset member is located inside the guide chamber, the elastic deformation direction of the elastic reset member is the guide direction of the guide chamber, and the two ends of the elastic reset member that are away from each other along its elastic deformation direction are respectively fixed to the limiter and the movable end.

[0011] In an optional embodiment, an electromagnetic lock hole is formed on the end surface of the protective cover plate close to the fixed base; the electromagnetic limit assembly further includes an electromagnetic lock outer shell, a guide inner shell, an electromagnetic armature and an electromagnetic lock core. The electromagnetic lock shell is installed inside the accommodating chamber; the guide inner shell is located inside the electromagnetic lock shell, and the end of the guide inner shell away from the fixed base is spaced apart from the end of the electromagnetic lock shell away from the fixed base; the electromagnetic armature is installed at the end of the electromagnetic lock shell away from the fixed base; the electromagnetic lock core includes a lock core part, an adsorption part and a guide part connected in sequence, the lock core part extends from the inside of the accommodating chamber to the outside of the electromagnetic lock shell, the end of the lock core part away from the fixed base is adapted to the electromagnetic lock hole for being plugged into the electromagnetic lock hole, the adsorption part is arranged between the end of the guide inner shell away from the fixed base and the end of the electromagnetic lock shell away from the fixed base, and the adsorption part reciprocates between the two ends under the action of the electromagnetic armature, and the guide part passes through the end of the guide inner shell away from the fixed base and extends to the inside of the guide inner shell.

[0012] In an optional embodiment, one end of the protective pressure plate is a hinged end, which is movably mounted on the surface of the fixed base, and the other end is a movable end, which rotates around the hinged end under the action of external force and approaches or moves away from the fixed base; the fixed lock core is arranged at the movable end.

[0013] In an optional embodiment, the protective pressure plate is further provided with an avoidance gap, the avoidance gap is located between the hinged end and the movable end, and the avoidance gap is used for snap-fitting and installing on the outer periphery of the isolation baffle.

[0014] In an optional embodiment, the fixed base includes a mounting base surface, which is used to install the isolation baffle and the electromagnetic limit assembly; the protective device also includes a wheel base, which is installed on the mounting base surface, the wheel base is connected to the hinged end of the protective pressure plate, and the wheel base rotates under the action of external force, and the rotation direction of the wheel base is parallel to the mounting base surface.

[0015] In an optional embodiment, a receiving groove is formed at the end of the protective pressure plate close to the fixed base, and the receiving groove is used to receive a connecting piece for fixing the isolation baffle to the fixed base.

[0016] In an optional embodiment, the protective cover is slidably mounted on the first opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the specific embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic structural diagram of the protective device for the isolation baffle of a wind turbine converter provided by the present invention in a first state;

[0019] Figure 2 A schematic structural diagram of the protective device for the isolation baffle of a wind turbine converter provided by the present invention when in the second state;

[0020] Figure 3 This is a structural schematic diagram of the protective device for the isolation baffle of a wind turbine converter provided by the present invention when the protective pressure plate is opened;

[0021] Figure 4 This is a structural schematic diagram of the protective device for the isolation baffle of a wind turbine converter provided by the present invention when the protective pressure plate is opened;

[0022] Figure 5 This is a schematic structural diagram of the installed rotor base in the protective device for the isolation baffle of a wind turbine converter provided by the present invention;

[0023] Figure 6 This is a partial enlarged structural diagram of the rotor base after installation in the protective device for the isolation baffle of the wind turbine converter provided by the present invention;

[0024] Figure 7 A schematic diagram of the structure in which a warning member is installed on the surface of a protective pressure plate in a protective device for an isolation baffle of a wind turbine converter provided by the present invention;

[0025] Figure 8 This is a schematic structural diagram of a protection device for a wind turbine converter isolation baffle provided by the present invention, in which a vibration detection component is installed inside a protection pressure plate;

[0026] Figure 9 This is a schematic structural diagram of the warning member installed in the protective device for the isolation baffle of the wind turbine converter provided by the present invention;

[0027] Figure 10 This is a partial enlarged structural diagram of the hinged connection between the protective pressure plate and the runner base in the protective device for the isolation baffle of the wind turbine converter provided by the present invention;

[0028] Figure 11 This is a schematic structural diagram of the protective device for the isolation baffle of a wind turbine converter provided by the present invention with the protective cover partially opened;

[0029] Figure 12 A schematic structural diagram of the electromagnetic protection body in the protection device for the isolation baffle of a wind turbine converter provided by the present invention;

[0030] Figure 13 A schematic structural diagram of a protective cover plate in a protective device for an isolation baffle of a wind turbine converter provided by the present invention;

[0031] Figure 14 A schematic structural diagram of a protective cover plate in a protective device for an isolation baffle of a wind turbine converter provided by the present invention;

[0032] Figure 15 This is a schematic structural diagram of the reset assembly after installation in the protective device for the isolation baffle of the wind turbine converter provided by the present invention;

[0033] Figure 16 A schematic diagram of the structure of the electromagnetic lock core after installation in the electromagnetic limit assembly of the protective device for the isolation baffle of the wind turbine converter provided by the present invention;

[0034] Figure 17 A schematic diagram of the working process of the protective device for the isolation baffle of the wind turbine converter provided by the present invention;

[0035] Figure 18 A schematic diagram of an electrical circuit when the protective device for the isolation baffle of a wind turbine converter provided by the present invention is in use;

[0036] Figure 19 This is a structural diagram of the grid-side power distribution module of the wind turbine converter provided by the present invention being electrically connected to the box-type transformer;

[0037] Figure 20 This is a structural schematic diagram of the wind turbine converter provided by the present invention.

[0038] Description of reference numerals:

[0039] 1. Fixed base; 111. Mounting base; 112. Mounting hole;

[0040] 21. Protective pressure plate; 211. Fixed lock core; 212. Hinge end; 213. Movable end; 214. Avoidance notch; 215. Accommodation slot;

[0041] 3. Electromagnetic limit assembly; 31. Electromagnetic protection body; 311. Accommodating chamber; 312. Fixed lock hole; 313. Mounting boss; 314. Guide chamber; 315. Mounting portion; 32. Protective cover; 321. Electromagnetic lock hole; 33. Electromagnetic lock housing; 34. Guide inner housing; 35. Electromagnetic armature; 36. Electromagnetic lock core; 361. Lock core portion; 362. Adsorption portion; 363. Guide portion;

[0042] 4. Vibration detection parts;

[0043] 5. Warning device; 51. Speaker; 52. Indicator light;

[0044] 6. Reset assembly; 61. Limiting member; 62. Guide member; 621. Fixed end; 622. Transition section; 623. Movable end; 63. Elastic reset member;

[0045] 7. Wheel base;

[0046] 81. Isolation baffle; 82. Connector; 83. Cable; 84. Grid-side circuit breaker;

[0047] 91. Generator-side power distribution module; 92. Generator-side power module; 93. Grid-side power module; 94. Grid-side power distribution module; 95. Low-voltage module of box-type transformer;

[0048] 101. Main switch; 102. First electromagnetic relay; 103. Second electromagnetic relay; 104. Third electromagnetic relay; 105. Third electromagnetic relay coil; 106. Time delay relay. DETAILED DESCRIPTION

[0049] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0050] As a core component in a wind turbine system, the wind turbine converter primarily consists of a grid-side power distribution cabinet, a generator-side power distribution cabinet, a grid-side power cabinet, and a generator-side power cabinet. During installation, the generator-side power distribution cabinet is directly connected to the wind turbine generator, allowing the generator-side power cabinet to convert the alternating current (AC) generated by the generator into direct current (DC). The grid-side power module then converts the DC energy into three-phase AC, which is then boosted by a box-type transformer for transmission to the grid. This ensures highly efficient conversion and stable output of wind power, significantly improving grid-connected compatibility.

[0051] The three-phase copper busbars in the grid-side power distribution cabinet of the wind turbine converter are connected to the low-voltage side of the box-type transformer via cables. However, in actual use, the three-phase copper busbars in the grid-side power distribution cabinet of the wind turbine converter were exposed at the connection point with the cables, posing a risk of electric shock. Therefore, an isolation baffle has been installed. According to the wind turbine converter operating procedures, the low-voltage side of the box-type transformer must be powered off before removing the isolation baffle to inspect and repair the cables, grid-side circuit breakers, and other components.

[0052] However, due to the weak safety awareness of power operation and maintenance personnel, violation of operating procedures, or mistaken entry into live intervals, the illegal removal of isolation baffles without disconnecting the low-voltage circuit breaker of the box transformer often occurs.

[0053] To this end, compared with the traditional operating mode that relies on the safety awareness of operation and maintenance personnel, this protective device forms an automated detection and alarm system by combining the physical locking of electromagnetic limiters, dynamic monitoring of vibrations, and real-time feedback. It can effectively prevent the occurrence of live electrical accidents caused by illegal disassembly of isolation baffles and improve the standardization of operation and maintenance.

[0054] The following combination Figures 1 to 20 , describing embodiments of the present invention.

[0055] According to an embodiment of the present invention, in one aspect, a protective device for an isolation baffle of a wind turbine converter is provided.

[0056] like Figure 1 As shown, the protective device includes a fixed base 1, which is used to fix the isolation baffle 81 at the connection between the three-phase copper busbar of the grid-side power distribution module and the cable 83. The protective device also includes a protective pressure plate 21, an electromagnetic limit assembly 3, a vibration detector 4, a warning element 5 and a control terminal.

[0057] Among them, the electromagnetic limit assembly 3 is installed on the fixed base 1, and the electromagnetic limit assembly 3 has a first state in which the protective pressure plate 21 is fixedly installed on the fixed base 1, and a second state in which the protective pressure plate 21 is unlocked; the vibration detection component 4 is installed on the protective pressure plate 21; the warning component 5 is installed on the protective pressure plate 21; the control terminal is used to control the electromagnetic limit assembly 3 to switch between the first state and the second state, and the control terminal is communicated with the vibration detection component 4 for receiving the actual vibration value fed back by the vibration detection component 4, and the control terminal is provided with a vibration threshold, and the control terminal is communicated with the warning component 5. When the electromagnetic limit assembly 3 is in the first state and the actual vibration value is greater than the vibration threshold, the control terminal generates a warning signal and transmits it to the warning component 5.

[0058] In this way, by setting up the electromagnetic limit assembly 3 and the vibration detection component 4, when in use, if the low-voltage side of the transformer is not powered off, the electromagnetic limit assembly 3 is in the first state (locked state), and the protective pressure plate 21 is fixed on the fixed base 1. If the operation and maintenance personnel forcibly remove the isolation baffle 81 in violation of regulations, it will cause the protective pressure plate 21 to vibrate.

[0059] For example, when the low-voltage module 95 of the box-type transformer is not powered off, if the isolation baffle 81 is forcibly removed, the vibration detection component 4 can capture the abnormal vibration value and feed it back to the control terminal. The control terminal compares the actual vibration value with the vibration threshold. If the vibration value exceeds the standard and the electromagnetic limit component 3 is still in the first state (that is, the power is not cut off and the electromagnetic limit component 3 is still working), a warning signal is immediately generated and transmitted to the warning component 5, thereby triggering the warning component 5 to issue an alarm and remind the operation and maintenance personnel to remove the isolation baffle 81 in accordance with the prescribed procedures.

[0060] Furthermore, when it is detected that the low-voltage module 95 of the box-type transformer is energized, the electromagnetic limit assembly 3 locks the protective pressure plate 21 to ensure that the isolation baffle 81 cannot be removed when the low-voltage module 95 of the box-type transformer is energized.

[0061] It can be explained that the vibration detection element 4 is preferably a vibration sensor. The vibration threshold here means that when the electromagnetic limit assembly 3 is in the first state and the isolation baffle 81 is not forcibly removed, the vibration value detected by the vibration sensor has a value range.

[0062] During actual use, when the electromagnetic limit assembly 3 is in the first state and the actual vibration value fed back to the control terminal exceeds the value range, the control terminal will generate a warning signal and transmit it to the warning member 5 for warning.

[0063] It can be explained that the structure of the warning member 5 is not specifically limited.

[0064] Preferably, the warning element 5 includes a sound warning element 5 and a light warning element 5 , such as a speaker 51 and an indicator light 52 .

[0065] It can be explained that the fixed base 1 is preferably an L-shaped structure and is made of triangular steel.

[0066] It can be explained that, in order to prevent the isolation baffle 81 from tipping over after installation, a pair of fixing bases 1 are used to fix the isolation baffle 81 .

[0067] Preferably, a protective pressure plate 21 , an electromagnetic limit assembly 3 , a vibration detection component 4 , and a warning component 5 are installed on one of the fixed bases 1 .

[0068] Furthermore, a pair of fixing bases 1 are preferably welded and fixedly mounted on a pair of opposite inner walls of the cabinet where the grid-side power distribution module 94 is located.

[0069] Furthermore, the isolation baffle 81 is tightly connected to the fixed base 1 through the mounting hole 112 and the connecting piece 82 .

[0070] It should be noted that there is no specific limitation on the connection method between the protective pressure plate 21 and the fixed base 1. The protective pressure plate 21 and the fixed base 1 can be connected using connectors 82 such as bolts and nuts after mounting holes 112 are formed in both the protective pressure plate 21 and the fixed base 1. Alternatively, a snap-fit ​​connection, hinged connection, or other similar methods can be used.

[0071] Preferably, the protective pressure plate 21 is fixed to the fixed base 1 by hinged connection.

[0072] Likewise, there is no specific limitation on the connection between the isolation baffle 81 and the fixed base 1. They can be connected using fasteners such as bolts and nuts, or by snap-fit ​​connection, hinge connection, etc.

[0073] Preferably, if Figures 1 to 3 、 Figure 5 and Figure 6 As shown, the mounting base surface 111 of the fixed base 1 and the isolation baffle 81 are both provided with mounting holes 112 that penetrate therethrough. After installation, fasteners such as bolts and nuts are used to complete the fixation.

[0074] It can be explained that when the protective pressure plate 21 is installed, the protective pressure plate 21 is at least partially located in the accommodating chamber 311 .

[0075] Preferably, if Figures 1 to 4 、 Figures 7 to 9 As shown, one end of the protective pressure plate 21 is a hinged end 212, which is movably mounted on the surface of the fixed base 1, and the other end is a movable end 213. The movable end 213 rotates around the hinged end 212 under the action of external force and moves closer to or away from the fixed base 1, so that the movable end 213 enters the accommodating chamber 311 or is taken out of the accommodating chamber 311; the fixed lock core 211 is set at the movable end 213.

[0076] In this way, by setting one end of the protective pressure plate 21 as a hinged end 212 and movably installed on the surface of the fixed base 1, and setting the other end as a movable end 213, the movable end 213 can rotate around the hinged end 212 above the fixed base 1 under the action of external force; by setting the fixed lock core 211 at the movable end 213, when the protective pressure plate 21 needs to be closed, the fixed lock core 211 is aligned with the fixed lock hole 312 by rotation until the locking is completed.

[0077] The opening and closing actions of the protective pressure plate 21 are made a continuous process, and by the hinged setting of the protective pressure plate 21, the isolation baffle 81 can be disassembled and installed without completely disassembling the protective pressure plate 21, which reduces the operation difficulty and saves operation time.

[0078] In one embodiment, Figures 1 to 4 、 Figures 7 to 9 As shown, the protective pressure plate 21 is further provided with an avoidance gap 214 . The avoidance gap 214 is located between the hinge end 212 and the movable end 213 . The avoidance gap 214 is used for buckling and installation on the outer periphery of the isolation baffle 81 .

[0079] In this way, by providing an avoidance gap 214 at the protective pressure plate 21, and setting the avoidance gap 214 between the hinged end 212 and the movable end 213, during installation, the avoidance gap 214 is snap-fitted and installed on the outer periphery of the isolation baffle 81, completing precise snapping, achieving close contact, and reducing the risk of exposure at the connection between the three-phase copper busbar and the cable 83.

[0080] In one embodiment, Figures 1 to 10 As shown, the fixed base 1 includes a mounting base surface 111, which is used to install the isolation baffle 81 and the electromagnetic limit assembly 3; the protective device also includes a wheel base 7, which is installed on the mounting base surface 111, and the wheel base 7 is connected to the hinge end 212 of the protective pressure plate 21, and the wheel base 7 rotates under the action of external force, and the rotation direction of the wheel base 7 is parallel to the mounting base surface 111.

[0081] In this way, by providing a rotary base 7 on the fixed base 1 and connecting it to the hinged end 212 of the protective pressure plate 21, the protective pressure plate 21 is allowed to rotate sideways or obliquely upward when opened, rather than simply swinging vertically. The opening direction of the protective pressure plate 21 can be adjusted as needed according to the actual space, thereby realizing rotary opening and closing control of the protective pressure plate 21, avoiding interference with other components, and making the layout more reasonable.

[0082] It can be explained that the wheel base 7 is configured as a cylindrical structure, such as Figures 1 to 6 and Figure 10As shown, the top center area is hollowed out, retaining only two side walls that are oppositely and spaced apart, and mounting holes 112 are provided on both side walls for mounting the hinge end 212 in the shape of a rotating shaft, thereby realizing hinge connection.

[0083] At the same time, it has a built-in axis of rotation perpendicular to the mounting base 111, so that the rotation direction of the installed wheel base 7 is parallel to the mounting base 111. The protective pressure plate 21 can swing around the wheel base 7 and cross the mounting base 111 and rotate on the mounting base 111.

[0084] In addition, the setting of the wheel base 7 is coordinated with the electromagnetic limit assembly 3 to prevent illegal operations.

[0085] Specifically, the rotation angle of the wheel base 7 can be linked to the electromagnetic limit assembly 3. For example, the wheel base 7 is allowed to rotate only when the electromagnetic limit assembly 3 is unlocked; if forced rotation is attempted without power being turned off, the electromagnetic limit assembly 3 will remain locked, physically blocking the operation path.

[0086] In one embodiment, Figures 1 to 4 Kazuto Figure 8 As shown, a receiving groove 215 is formed at the end of the protective pressure plate 21 close to the fixed base 1 , and the receiving groove 215 is used to receive the connecting piece 82 that fixes the isolation baffle 81 to the fixed base 1 .

[0087] In this way, a receiving groove 215 for accommodating the connecting member 82 is opened at the end of the protective pressure plate 21 close to the fixed base 1. After installation, the receiving groove 215 completely hides the connecting member 82 of the fixed isolation baffle 81 inside the protective pressure plate 21 to prevent it from being directly exposed to the external environment, providing a physical barrier for the connecting member 82 and protecting it.

[0088] At the same time, the receiving groove 215 accommodates the connecting member 82 inside the protective pressure plate 21, which can improve the space utilization efficiency and make the overall layout more compact.

[0089] During use, by rotating the wheel base 7 and swinging the protective pressure plate 21, the avoidance notch 214 of the protective pressure plate 21 is tightly fastened and installed on the isolation baffle 81. At this time, the portion of the connecting piece 82 corresponding to the accommodating groove 215 protruding from the isolation baffle 81 will be located inside the accommodating groove 215.

[0090] It can be explained that the number of the accommodating grooves 215 and the number of the connecting members 82 correspond one to one.

[0091] Furthermore, a sealing ring or protective cover is provided at the receiving groove 215 to seal it and prevent pollutants such as moisture or dust from entering, thereby avoiding rust or functional failure caused by environmental factors such as moisture and salt spray when the connecting member 82 is in the receiving groove 215.

[0092] In one embodiment, Figures 1 to 3 and Figure 11 As shown, the electromagnetic limit assembly 3 includes an electromagnetic protection body 31 and a protective cover 32. The electromagnetic protection body 31 is mounted on the fixed base 1 and defines a receiving chamber 311 with a first opening. The protective cover 32 is slidably mounted on the first opening. When an external force is applied, the protective cover 32 at least partially opens the first opening. When the external force is removed, the protective cover 32 closes the first opening under the action of the reset assembly 6.

[0093] With this arrangement, by providing the electromagnetic protection body 31 with a housing chamber 311 and a first opening in the housing chamber 311, the protective pressure plate 21 can be moved through the first opening and secured within or removed from the housing chamber 311. When the electromagnetic limit assembly 3 is in the first state, the external force is removed, and the protective cover 32, under the action of the reset assembly 6, closes the first opening, forming a physical barrier that prevents maintenance personnel from directly contacting or removing the isolation baffle 81, thereby preventing any unauthorized removal of the isolation baffle 81.

[0094] At the same time, under the action of external force, the protective cover 32 is opened to release the protective pressure plate 21.

[0095] It can be explained that the form in which the protective cover 32 is slidably mounted on the first opening is not specifically limited, and is preferably a form in which a slider is slidably mounted on a slide groove.

[0096] As one embodiment, the protective cover 32 is provided with a slider, such as a trapezoidal slider, and a slide groove is provided on the inner wall of the first opening. The cross section of the slide rail is adapted to the cross section of the slide rail. During installation, the sliding protrusion of the slider is placed into the slide groove.

[0097] In one embodiment, Figures 1 to 3 、 Figure 7 、 Figure 8 、 Figure 11 and Figure 12 As shown, the electromagnetic protection body 31 is further provided with a fixed lock hole 312 ; the protection pressure plate 21 is provided with a fixed lock core 211 , and the fixed lock core 211 is used to be installed in the fixed lock hole 312 .

[0098] In this configuration, by providing a fixed lock hole 312 on the electromagnetic protection body 31 and providing a fixed lock core 211 on the protection pressure plate 21, during installation, the fixed lock core 211 is inserted into the fixed lock hole 312 to fix the protection pressure plate 21.

[0099] In one embodiment, Figure 11 and Figure 12As shown, the electromagnetic protection body 31 is further provided with a mounting boss 313 , which is disposed in the accommodating chamber 311 . The mounting boss 313 is provided with a guide chamber 314 , which is provided with a second opening.

[0100] The reset assembly 6 includes a limiter 61, a guide 62, and an elastic reset member 63. The limiter 61 is fixedly mounted at the second opening; the guide 62 is provided with a fixed end 621, a transition section 622, and a movable end 623 along its length. The fixed end 621 is connected to the protective cover 32, the transition section 622 is passed through the second opening, and the movable end 623 is located inside the guide chamber 314. The elastic reset member 63 is located inside the guide chamber 314. The elastic deformation direction of the elastic reset member 63 is the guide direction of the guide chamber 314, and the two ends of the elastic reset member 63 that are away from each other along the elastic deformation direction are fixed to the limiter 61 and the movable end 213 respectively.

[0101] Such a configuration, through the configuration of the reset component 6 , helps to accurately reset the protective cover 32 .

[0102] Specifically, by connecting the fixed end 621 of the guide member 62 to the protective cover 32, the transition section 622 passes through the second opening, and the movable end 623 is located in the guide chamber 314, the elastic reset member 63 is applied with elastic force along the guide direction of the guide chamber 314, and its two ends are respectively fixed to the limit member 61 and the movable end 623 to ensure that the opening and closing process of the protective cover 32 always follows the preset posture, avoiding reset failure due to offset or jamming.

[0103] At the same time, by installing the limiting member 61 at the second opening, the guide member 62 and the elastic return member 63 can be at least partially fixed in the guide chamber 314.

[0104] It should be noted that the moving direction of the guide member 62 is the length direction, and the parts of the guide member 62 that move inside the guide chamber 314 are the transition section 622 and the movable end portion 623 .

[0105] It can be explained that a third opening is provided in the guide chamber 314 opposite to the second opening, so that the movable end portion 623 can extend out of the guide chamber 314 at the third opening when the protective cover 32 opens the first opening.

[0106] It can be explained that the number of guide members 62 , elastic return members 63 and guide chambers 314 corresponds one to one.

[0107] Preferably, a pair of guide chambers 314 , a pair of guide members 62 , and a pair of elastic return members 63 are provided.

[0108] It can be noted that the shape of the guide chamber 314 is not specifically limited.

[0109] Preferably, the cross-sectional shape of the guide chamber 314 is circular.

[0110] Furthermore, the guide chamber 314 is cylindrical in shape as a whole.

[0111] It should be noted that the second opening is provided at the end of the guide chamber 314 close to the fixing lock hole 312 .

[0112] It can be explained that the limiting member 61 is preferably a nut with an external thread, and the second opening of the guide chamber 314 is provided with an internal thread matching the nut.

[0113] During installation, the nut is placed on the outside of the transition section, and the movable end 623 and the transition section 622 extend into the guide chamber 314 at the second opening, and the nut is screwed into the second opening until it is tightened, so that the movable end 623 and the transition section 622 move to the required position.

[0114] Furthermore, the elastic reset member 63 is preferably a spring. During installation, the spring is sleeved outside the transition section 622 and the movable end portion 623 of the guide member 62.

[0115] When installed, the spring is in a naturally extended state.

[0116] During use, an external force acts on the protective cover 32, causing it to slide outward along the chute. During this time, the spring gradually compresses, storing energy. After the protective pressure plate 21 swings to the desired position and engages the isolation baffle 81, the fixed lock core 211 engages within the fixed lock hole 312, completing the locking process. Subsequently, the external force is removed, the spring releases its energy, and under the action of the spring's elastic force, the protective cover 32 gradually returns to its original position, isolating and protecting the protective pressure plate 21.

[0117] Afterwards, the electromagnetic limiting assembly 3 further limits the protective pressure plate 21 to achieve multiple protections.

[0118] In one embodiment, Figure 11 、 Figure 13 、 Figure 15 and Figure 16 As shown, an electromagnetic lock hole 321 is opened on the end surface of the protective cover plate 32 close to the fixed base 1; the electromagnetic limit assembly 3 also includes an electromagnetic lock outer shell 33, a guide inner shell 34, an electromagnetic armature 35 and an electromagnetic lock core 36.

[0119] The electromagnetic lock shell 33 is installed inside the accommodating chamber 311; the guide inner shell 34 is located inside the electromagnetic lock shell 33, and the end of the guide inner shell 34 facing away from the fixed base 1 is spaced apart from the end of the electromagnetic lock shell 33 facing away from the fixed base 1; the electromagnetic armature 35 is installed at the end of the electromagnetic lock shell 33 facing away from the fixed base 1.

[0120] Preferably, a third opening is provided at the end of the electromagnetic lock housing 33 facing away from the fixed base 1 , and the electromagnetic armature 35 is installed at the third opening.

[0121] like Figures 1 to 6 、 Figure 10 and Figure 16 As shown, the electromagnetic lock core 36 includes a lock core portion 361 , an adsorption portion 362 and a guide portion 363 which are connected in sequence.

[0122] The lock core portion 361 extends from the interior of the accommodating chamber 311 toward the third opening and extends to the outside of the electromagnetic lock housing 33 .

[0123] The end of the lock core portion 361 facing away from the fixed base 1 is adapted to the electromagnetic lock hole 321 and is used for being inserted into the electromagnetic lock hole 321 .

[0124] The adsorption portion 362 is disposed between the end of the guide inner shell 34 away from the fixed base 1 and the end of the electromagnetic lock outer shell 33 away from the fixed base 1 , and the adsorption portion 362 reciprocates between the two ends under the action of the electromagnetic armature 35 .

[0125] The guide portion 363 is disposed through the end portion of the guide inner shell 34 away from the fixed base 1 and extends into the interior of the guide inner shell 34 .

[0126] With such a configuration, precise electromagnetic control and reliable locking of the protective cover 32 are achieved through the configuration of the electromagnetic lock outer shell 33 , the guide inner shell 34 , the electromagnetic armature 35 and the electromagnetic lock core 36 .

[0127] Specifically, the guide inner shell 34 provides a precise guide path for the linear motion of the lock core part 361, and the electromagnetic armature 35 provides different magnetic fields when energized in the forward and reverse directions, so that the adsorption part 362 of the electromagnetic lock core 36 will make linear reciprocating motion along the guide direction of the guide inner shell 34 under the action of the magnetic force of the electromagnetic armature 35. Since the lock core part 361, the adsorption part 362 and the guide part 363 are arranged in sequence, the lock core part 361 will be driven to make reciprocating motion, thereby realizing remote control locking and unlocking.

[0128] Among them, the electromagnetic armature 35 is attracted by the logic as follows Figure 18 As shown, when current is detected at the grid-side busbar of the wind turbine converter, a closing signal is given to the first electromagnetic relay 102. At this time, the main switch 101 is in the normally closed state, and DC current is passed through the positive and negative poles of the KM wire. The electromagnetic armature 35 is energized to generate a magnetic field and attract the adsorption part 362. The lock core part 361 will be embedded in the electromagnetic lock hole 321, and the protective cover will be locked in a limited position, so that the operation and maintenance personnel cannot push the protective cover 32, thereby completing the physical isolation of the protective pressure plate 21.

[0129] If unlocking is required, the main switch 101 is in the normally open state, the electromagnetic armature 35 does not generate a magnetic field, the adsorption portion 362 is not affected by the magnetic field, and gradually separates from the electromagnetic lock hole 321 under the action of its own gravity.

[0130] Of course, in other optional embodiments, alternating current can also be passed through the positive and negative poles of the KM wire, with the power supply direction subsequently defined as forward and reverse. Specifically, when the electromagnetic armature 35 is energized in either the forward or reverse direction, the adsorption portion 362 is magnetically attracted to the end of the electromagnetic lock housing 33, driving the lock core 361 to precisely insert into the electromagnetic lock hole 321 of the protective cover 32, thereby achieving locking. When the electromagnetic armature 35 is energized in the other direction, the lock core 361 retracts, releasing the lock.

[0131] In one embodiment, the electromagnetic protection body 31 is further provided with a mounting portion 315 for mounting the electromagnetic lock housing 33 .

[0132] like Figure 11 、 Figure 12 、 Figure 15 and Figure 16 As shown, the mounting portion 315 is adapted to the electromagnetic lock housing 33 and is in the form of a fixing groove. During installation, the electromagnetic lock housing 33 is inserted into the fixing groove.

[0133] When using the aforementioned protective device for the isolation baffle of a wind turbine converter, the isolation baffle 81 is secured to the mounting base 111 of the fixed base 1 via the connector 82. The runner base 7 is then adjusted, and the movable end 213 of the protective pressure plate 21 is operated until the avoidance notch 214 is fully engaged and pressed against the isolation baffle 81, so that the connector 82 corresponding to the receiving groove 215 on the isolation baffle 81 is completely located within the receiving groove 215. The protective cover 32 is then slid until the fixed lock core 211 is fully embedded in the fixed lock hole 312, completing the locking operation. The external force is then removed, allowing the protective cover 32 to return to its original position under the action of the elastic return member 63. When it is detected that the low-voltage module 95 of the box-type transformer (or the incoming busbar of the converter grid-side distribution module 94, hereinafter referred to as the converter grid-side incoming busbar) is energized (the current is greater than 0), the control circuit controls the electromagnetic armature 35 to be attracted, and the electromagnetic lock core 36 enters the electromagnetic lock hole 321, completing the mechanical and electromagnetic interlocking of the electromagnetic limit assembly 3 and the protective pressure plate 21.

[0134] like Figures 1 to 18 As shown, when it is detected that the current of the incoming busbar on the grid side of the converter is not 0 and the electrical signal is 1, the electromagnetic armature 35 is attracted, the lock core part 361 is embedded in the electromagnetic lock hole 321, the protective cover 32 is locked, and the physical isolation of the protective pressure plate 21 fixing the lock core 211 is completed.

[0135] Furthermore, the protective device for the isolation baffle of the wind turbine converter further includes a main switch 101 , a first electromagnetic relay 102 , a second electromagnetic relay 103 , a third electromagnetic relay 104 and a time delay relay 106 .

[0136] Among them, the first electromagnetic relay 102 is installed on the main line of the control circuit, the electromagnetic armature 35 is installed on one branch of the control circuit, the coils of the second electromagnetic relay 103 and the third electromagnetic relay 104 are installed on another branch of the control circuit, the third electromagnetic relay 104, the delay relay 106, and the warning member 5 are installed on another branch of the control circuit, and the three branches are arranged in parallel.

[0137] Among them, the delay relay 106 is selected as a delayed disconnection time relay.

[0138] Further, if Figure 17 and Figure 18 As shown, when it is detected that the actual vibration value measured by the vibration sensor is greater than the vibration threshold, the electrical signal is 1, the second electromagnetic relay 103 is closed, the third electromagnetic relay 104 is energized, and the third electromagnetic relay 104 is controlled to be closed. During the delayed disconnection time period of the delay relay 106, the speaker 51 and the indicator light 52 of the warning member 5 sound an alarm.

[0139] Furthermore, when it is detected that the incoming busbar current on the grid side of the converter is 0 and the electrical signal is 0, the first electromagnetic relay 102 is disconnected, the electromagnetic limit assembly 3 fails, the protective cover 32 can slide freely, and the protective pressure plate 21 can be unlocked by using the key. At the same time, the warning part 5 fails, and the operation and maintenance personnel can freely remove the isolation baffle 81.

[0140] Furthermore, when it is necessary to carry out inspection or testing with the incoming busbar on the grid side of the converter energized, in order to avoid the situation where the electromagnetic limit assembly 3 is locked and the isolation baffle 81 cannot be removed, a main switch 101 is provided in the control background, and the electrical connection end of the main switch 101 is connected to the trunk line where the first electromagnetic relay 102 is located. At this time, the on-duty personnel at the control terminal agree to disconnect the main switch 101. At this time, the electromagnetic limit assembly 3 and the warning member 5 are both invalid, and the operation and maintenance personnel can remove the isolation baffle 81 on site. The control circuit where the electromagnetic limit assembly 3 and the warning member 5 are located is as follows. Figure 18 shown.

[0141] It can be explained that the above-mentioned protective device for the isolation baffle of the wind turbine converter is applied to the wind turbine converter, such as Figure 19 and Figure 20 As shown, the wind turbine converter includes a machine-side cabinet group and a grid-side cabinet group.

[0142] Specifically, the machine-side cabinet group includes a machine-side distribution module 91 and a machine-side power module 92. The machine-side distribution module 91 is electrically connected to the wind turbine generator set through a cable 83, and the machine-side power module 92 is electrically connected to the machine-side distribution module 91 through a cable 83; the grid-side cabinet group includes a grid-side power module 93 and a grid-side distribution module 94. The grid-side power module 93 is electrically connected to the machine-side power module 92 through a cable 83, and the grid-side distribution module 94 is electrically connected to the grid-side power cabinet through a cable 83, and the grid-side distribution module 94 is used to be electrically connected to the box-type transformer.

[0143] Among them, the grid-side distribution module 94 is equipped with a three-phase copper busbar, an isolation baffle 81 and a protective device for the isolation baffle of the wind turbine converter. The three-phase copper busbar is electrically connected to the low-voltage module 95 of the box-type transformer through a cable 83. The isolation baffle 81 is installed at the connection between the three-phase copper busbar and the cable 83. The protective device is installed at the isolation baffle 81 to prevent operation and maintenance personnel from illegally dismantling the isolation baffle 81.

[0144] In one embodiment, Figure 19 As shown, a grid-side circuit breaker 84 is installed inside the grid-side power distribution module 94 .

[0145] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A protective device for an isolation baffle of a wind turbine converter, comprising a fixed base (1), wherein the fixed base (1) is used to fix the isolation baffle (81) at the connection between the three-phase copper busbar and the cable (83) of the grid-side power distribution module (94), characterized in that: The protective gear also includes: Protective pressure plate (21); An electromagnetic limiting assembly (3), the electromagnetic limiting assembly (3) being mounted on the fixed base (1), the electromagnetic limiting assembly (3) having a first state in which the protective pressure plate (21) is fixedly mounted on the fixed base (1), and a second state in which the protective pressure plate (21) is unlocked; a vibration detection member (4), the vibration detection member (4) being mounted on the protective pressure plate (21); A warning member (5), the warning member (5) being mounted on the protective pressure plate (21); A control terminal, wherein the control terminal is used to control the electromagnetic limiting component (3) to switch between a first state and a second state, the control terminal is in communication connection with the vibration detection component (4), and is used to receive an actual vibration value fed back by the vibration detection component (4), and the control terminal is provided with a vibration threshold value, and the control terminal is in communication connection with the warning component (5), and when the electromagnetic limiting component (3) is in the first state and the actual vibration value is greater than the vibration threshold value, the control terminal generates a warning signal and transmits it to the warning component (5).

2. The protective device for the isolation baffle of a wind turbine converter according to claim 1, characterized in that: The electromagnetic limiting assembly (3) comprises: An electromagnetic protection body (31), the electromagnetic protection body (31) being mounted on the fixed base (1), the electromagnetic protection body (31) being provided with a receiving chamber (311), and the receiving chamber (311) being provided with a first opening; A protective cover plate (32) is slidably mounted at the first opening. The protective cover plate (32) at least partially opens the first opening under the action of an external force, and after the external force is removed, the protective cover plate (32) closes the first opening under the action of a reset assembly (6).

3. The protective device for the isolation baffle of a wind turbine converter according to claim 2, characterized in that: The electromagnetic protection body (31) is also provided with a fixing lock hole (312); The protective pressure plate (21) is provided with a fixed lock core (211), and the fixed lock core (211) is used to be installed in the fixed lock hole (312).

4. The protective device for the isolation baffle of a wind turbine converter according to claim 3, characterized in that: The electromagnetic protection body (31) is further provided with a mounting boss (313), the mounting boss (313) being arranged in the accommodating chamber (311), the mounting boss (313) being provided with a guide chamber (314), and the guide chamber (314) being provided with a second opening; The reset component (6) comprises: A limiting member (61), the limiting member (61) is installed at the second opening in a limiting manner; A guide member (62), the guide member (62) being provided with a fixed end portion (621), a transition section (622), and a movable end portion (623) in sequence along its length direction, the fixed end portion (621) being connected to the protective cover plate (32), the transition section (622) being passed through the second opening, and the movable end portion (623) being located inside the guide chamber (314); An elastic return member (63), the elastic return member (63) is located inside the guide chamber (314), the elastic deformation direction of the elastic return member (63) is the guide direction of the guide chamber (314), and the two ends of the elastic return member (63) that are away from each other along the elastic deformation direction are respectively fixed to the limit member (61) and the movable end (213).

5. The protective device for the isolation baffle of a wind turbine converter according to any one of claims 2 to 4, characterized in that: An electromagnetic lock hole (321) is provided on the end surface of the protective cover plate (32) close to the fixed base (1); The electromagnetic limiting assembly (3) further comprises: an electromagnetic lock housing (33), the electromagnetic lock housing (33) being installed inside the accommodating chamber (311); A guide inner shell (34), the guide inner shell (34) is located inside the electromagnetic lock outer shell (33), and the end of the guide inner shell (34) facing away from the fixed base (1) is spaced apart from the end of the electromagnetic lock outer shell (33) facing away from the fixed base (1); an electromagnetic armature (35), the electromagnetic armature (35) being mounted on an end of the electromagnetic lock housing (33) facing away from the fixed base (1); An electromagnetic lock core (36), the electromagnetic lock core (36) includes a lock core portion (361), an adsorption portion (362) and a guide portion (363) connected in sequence, the lock core portion (361) extends from the inside of the accommodating chamber (311) to the outside of the electromagnetic lock shell (33), the end of the lock core portion (361) away from the fixed base (1) is adapted to the electromagnetic lock hole (321) for insertion into the electromagnetic lock hole (321), the adsorption portion (362) is arranged between the end of the guide inner shell (34) away from the fixed base (1) and the end of the electromagnetic lock shell (33) away from the fixed base (1), and the adsorption portion (362) reciprocates between the two ends under the action of the electromagnetic armature (35), the guide portion (363) is penetrated by the end of the guide inner shell (34) away from the fixed base (1) and extends to the inside of the guide inner shell (34).

6. The protective device for the isolation baffle of a wind turbine converter according to any one of claims 3 to 4, characterized in that: One end of the protective pressure plate (21) is a hinged end (212), and the hinged end (212) is movably mounted on the surface of the fixed base (1). The other end is a movable end (213), and the movable end (213) rotates around the hinged end (212) under the action of an external force and moves closer to or away from the fixed base (1). The fixed lock core (211) is arranged at the movable end (213).

7. The protective device for the isolation baffle of a wind turbine converter according to claim 6, characterized in that: The protective pressure plate (21) is further provided with an escape notch (214), the escape notch (214) being located between the hinged end (212) and the movable end (213), and the escape notch (214) being used for being fastened and mounted on the outer periphery of the isolation baffle (81).

8. The protective device for the isolation baffle of a wind turbine converter according to claim 6, characterized in that: The fixed base (1) comprises a mounting base surface (111), and the mounting base surface (111) is used for mounting an isolation baffle (81) and an electromagnetic limiting assembly (3); The protective device further comprises a wheel base (7), the wheel base (7) being mounted on the mounting base surface (111), the wheel base (7) being connected to the hinge end (212) of the protective pressure plate (21), and the wheel base (7) being rotated under the action of an external force, and the rotation direction of the wheel base (7) being parallel to the mounting base surface (111).

9. The protective device for the isolation baffle of a wind turbine converter according to any one of claims 1 to 4, characterized in that: The protective pressure plate (21) is provided with a receiving groove (215) at an end portion close to the fixed base (1), and the receiving groove (215) is used to receive a connecting piece (82) for fixing the isolation baffle (81) to the fixed base (1).

10. The protective device for the isolation baffle of a wind turbine converter according to any one of claims 2 to 4, characterized in that: The protective cover plate (32) is slidably mounted on the first opening.

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