CN114382347A

CN114382347A - Offshore wind turbine control system

Info

Publication number: CN114382347A
Application number: CN202111523478.9A
Authority: CN
Inventors: 杜将武; 陈崇民; 邓平强; 曾庆华; 纪长久; 苏晓明; 邹业传; 林良财; 余泳; 王永锋
Original assignee: Huadian Fujian Wind Power Co ltd
Current assignee: Huadian Fujian Wind Power Co ltd
Priority date: 2021-12-13
Filing date: 2021-12-13
Publication date: 2022-04-22

Abstract

The invention discloses an offshore wind power fan control system which comprises a tower body assembly, wherein the tower body assembly comprises an engine room and a tower drum, the engine room is arranged at the top of the tower drum, a yaw part is arranged at the top of the tower drum and connected with the engine room, and a control cabinet is arranged at the bottom in the tower drum; the power generation assembly comprises blades, a hub, a variable pitch piece, a main shaft and a generator, wherein the main shaft is arranged in the engine room and connected with the generator, the hub is connected with the main shaft, the blades are distributed on the periphery of the hub, and the variable pitch piece is connected with the blades; according to the invention, the fixed piece can be switched to be opened by using a key according to the situation after power failure, so that the situation that the fixed piece cannot be opened after power failure is avoided.

Description

Offshore wind turbine control system

Technical Field

The invention relates to the technical field of offshore wind power, in particular to an offshore wind power fan control system.

Background

The kinetic energy of wind is converted into mechanical kinetic energy, and then the mechanical energy is converted into electric kinetic energy, namely wind power generation. According to current windmill technology, the generation of electricity can be started at a breeze speed (in the order of breeze) of about three meters per second. Wind power generation is forming a hot tide in the world because it does not require the use of fuel and does not produce radiation or air pollution. The wind generating set is generally arranged in desert, gobi, sea and other areas, the operation environment is severe, the traffic is inconvenient, and the maintenance is difficult. The main control system of the wind generating set is arranged in a control cabinet of a tower, and the surface of the existing wind generating set is mostly coated after acid pickling and phosphating, so that the wind generating set has certain functions of corrosion resistance and salt mist resistance; but be connected through the key between the cabinet door of switch board and the cabinet body, lead to the leakproofness of switch board relatively poor, hardly resist the corruption of external environment to each part of the internal control system of cabinet, influence generating set operation's stability.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments, and in this section as well as in the abstract and the title of the invention of this application some simplifications or omissions may be made to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made keeping in mind the above problems occurring in the prior art and/or the problems occurring in the prior art.

Therefore, the invention aims to solve the technical problem that the existing electromagnetic lock for the control cabinet is difficult to open after power failure.

In order to solve the technical problems, the invention provides the following technical scheme: an offshore wind turbine control system comprises,

the tower body assembly comprises an engine room and a tower drum, the engine room is arranged at the top of the tower drum, a yaw part is arranged at the top of the tower drum and connected with the engine room, and a control cabinet is arranged at the bottom in the tower drum;

the power generation assembly comprises blades, a hub, a variable pitch part, a main shaft and a power generator, wherein the main shaft is arranged in the engine room and connected with the power generator, the hub is connected with the main shaft, the blades are distributed on the periphery of the hub, and the variable pitch part is connected with the blades.

As a preferable scheme of the offshore wind turbine control system of the present invention, wherein: the main shaft is connected with a gear box, and the gear box is connected with a generator through a high-speed shaft.

As a preferable scheme of the offshore wind turbine control system of the present invention, wherein: a brake is arranged on the high-speed shaft; an electric control cabinet is connected to the generator.

As a preferable scheme of the offshore wind turbine control system of the present invention, wherein: the power distribution assembly comprises a rotor side converter and a grid side converter, the rotor side converter is connected with the generator and the control cabinet, and the grid side converter is connected with the rotor side converter and the control cabinet.

As a preferable scheme of the offshore wind turbine control system of the present invention, wherein: the variable-pitch piece is connected with a variable-pitch motor.

As a preferable scheme of the offshore wind turbine control system of the present invention, wherein: the control cabinet comprises a cabinet body and a cabinet door, wherein an embedded groove is formed in the cabinet body, and a protection part, a power supply assembly and a lightning protection part are arranged in the embedded groove;

the cabinet door is arranged at the opening of the built-in groove.

As a preferable scheme of the offshore wind turbine control system of the present invention, wherein: one side of the cabinet door is hinged with the cabinet body, and a lock hole is formed in the side face of the cabinet door.

As a preferable scheme of the offshore wind turbine control system of the present invention, wherein: the side wall of the built-in groove is inwards provided with a first square groove, the side surface of the cabinet body is inwards provided with a pipe groove, and the first square groove is vertically communicated with the pipe groove.

As a preferable scheme of the offshore wind turbine control system of the present invention, wherein: the pipe groove is characterized by further comprising an unlocking piece and a fixing piece, wherein the fixing piece is embedded in the first square groove, the end part of the fixing piece is connected with the bottom of the first square groove through a first spring, the unlocking piece is embedded in the pipe groove, and the end part of the unlocking piece is connected with the bottom of the pipe groove through a second spring;

the end of the fixing piece is provided with a first inclined plane.

As a preferable scheme of the offshore wind turbine control system of the present invention, wherein: both sides are provided with the side groove on the mounting, side groove one side edge is provided with the second inclined plane.

The invention has the beneficial effects that: according to the invention, the fixed piece can be switched to be opened by using a key according to the situation after power failure, so that the situation that the fixed piece cannot be opened after power failure is avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

fig. 1 is a schematic diagram illustrating an overall distribution structure of a tower assembly and a power generation assembly in an offshore wind turbine control system according to an embodiment of the present invention;

fig. 2 is a schematic view of an electrical connection structure between a control cabinet and a power generation assembly in the offshore wind turbine control system according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a control cabinet in an offshore wind turbine control system according to an embodiment of the present invention;

fig. 4 is a schematic structural view illustrating a pilot embedded in a limiting groove in an offshore wind turbine control system according to an embodiment of the present invention;

fig. 5 is a schematic structural view illustrating a fixing member embedded in a first square groove in an offshore wind turbine control system according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a second through slot in the offshore wind turbine control system according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a fixing member in an offshore wind turbine control system according to an embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Next, the present invention will be described in detail with reference to the drawings, wherein the cross-sectional views illustrating the structure of the device are not enlarged partially according to the general scale for convenience of illustration when describing the embodiments of the present invention, and the drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.

Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 to 7, the embodiment provides an offshore wind turbine control system, which includes a tower body assembly 100, where the tower body assembly 100 includes a nacelle 101 and a tower 102, the nacelle 101 is disposed at the top of the tower 102, a yaw part 103 is disposed at the top of the tower 102 and connected to the nacelle 101, and a control cabinet 104 is disposed at the bottom inside the tower 102; the power generation assembly 200 comprises blades 201, a hub 202, a variable pitch piece 203, a main shaft 204 and a power generator 205, wherein the main shaft 204 is arranged in the nacelle 101 and connected with the power generator 205, the hub 202 is connected with the main shaft 204, the blades 201 are distributed on the periphery of the hub 202, and the variable pitch piece 203 is connected with the blades 201.

The main shaft 204 is connected with a gear box 206, and the gear box 206 is connected with a generator 205 through a high-speed shaft 207; a brake 207a is arranged on the high-speed shaft 207; an electric control cabinet 205a is connected to the generator 205; the power distribution assembly 300 comprises a rotor-side converter 301 and a grid-side converter 302, wherein the rotor-side converter 301 is connected with the generator 205 and the control cabinet 104, and the grid-side converter 302 is connected with the rotor-side converter 301 and the control cabinet 104; pitch piece 203 is connected with pitch motor 203 a.

In this embodiment, the variable speed constant frequency doubly-fed wind turbine generally comprises main parts such as blades, a step-up gear box, a generator, a yaw device, a pitch device, a tower and a control system, and the functions of the variable speed constant frequency doubly-fed wind turbine are described in detail below:

the blade 101: the wind wheel is used for converting wind energy into mechanical energy and is formed by installing blades (2-3 blades are generally used in a large-scale commercial wind turbine generator at present) with excellent pneumatic performance on a hub. The wind wheel rotating at low speed is accelerated by the speed-increasing gear box through the transmission system, and power is transmitted to the generator. The above-mentioned components are all mounted on the plane of the machine cabin, and the whole machine cabin is lifted by a high-rise building frame, and because the wind direction is frequently changed, in order to effectively utilize wind energy, a windward device is necessary, and according to the wind direction signal measured by a wind vane, a controller controls a yaw motor to drive a small gear meshed with a large gear on a tower frame to rotate, so that the machine cabin is always facing the wind. The hub is a hub of the wind wheel, is a connecting part of the root of the blade and the main shaft, and is also used for controlling the pitch of the blade.

Gearbox 206: the gearbox 206 connects the low speed shaft and the high speed shaft transmission and increases the speed of the high speed shaft 207 by a factor of 100.

The generator 205: the wind motor generator converts mechanical energy into electrical energy. Compared with the power generation equipment on the common power grid, the generator on the wind driven generator is different: the wind generator 205 needs to operate under fluctuating mechanical energy conditions. The wind turbine generator 205 that is typically used is an induction generator or an asynchronous generator, and some use permanent magnet synchronous generators.

The yaw member 103: the nacelle is rotated by means of an electric motor in order to adjust the rotor blades to the optimum cut-in angle of the wind direction. The yaw 103 is operated by an electronic controller which can ascertain the wind direction from a wind vane. Typically, a wind turbine will only deflect a few degrees at a time as the wind changes its direction.

The variable-pitch part 203: pitch is the size of the blade mounted on the hub that can be controlled to change its pitch angle. In the operation process, when the output power is less than the rated power, the pitch angle is kept unchanged at the position of 0 degree and is not regulated; when the output power of the generator reaches the rated power, the adjusting system adjusts the size of the pitch angle according to the change of the output power, so that the output power of the generator is kept at the rated power. At this time, the control system participates in regulation to form closed-loop control.

Tower 102: the wind turbine tower carries a nacelle and a rotor. Generally high towers are advantageous because the higher the distance from the ground, the higher the wind speed. The tower height of a 600 kilowatt wind motor is 40-60 meters, and the tower height of 5 megawatts exceeds 100 meters. The supporting tower can be tubular or in a lattice shape according to different bases. Tubular towers are safer for maintenance personnel as they can reach the top of the tower through an internal ladder. The advantage of a lattice tower is that it is lightweight and relatively technically mature (same principle as an offshore oil rig).

The control cabinet 104: the control system is the brain of the wind generating set, automatically completes all working processes of the wind generating set and provides a human-computer interface and a remote monitoring interface. The performance of the control system has a crucial influence on the operating efficiency and the service life of the fan. The control software can accurately realize the special control requirements of the wind generating set according to the research results of the basic theory of wind power generation and the data in the actual operation process of the set, and has very important significance on the safety and reliability of the set.

Further, the control cabinet 104 comprises a cabinet body 104a and a cabinet door 104b, an internal groove 104c is arranged in the cabinet body 104a, and a protection piece 104d, a power supply assembly 104e and a lightning arrester 104f are arranged in the internal groove 104 c; the cabinet door 104b is arranged at the opening of the built-in slot 104 c; one side of the cabinet door 104b is hinged with the cabinet body 104b, and a lock hole A is arranged on the side surface of the cabinet door 104 b.

Further, a first square groove 401 is inwardly arranged on the side wall of the built-in groove 104c, a pipe groove 402 is inwardly arranged on the cabinet body 104a from the side, and the first square groove 401 is vertically communicated with the pipe groove 402.

The pipe joint further comprises an unlocking piece 501 and a fixing piece 502, wherein the fixing piece 502 is embedded in the first square groove 401, the end part of the fixing piece 502 is connected with the bottom of the first square groove 401 through a first spring 502b, the unlocking piece 501 is embedded in the pipe groove 402, and the end part of the unlocking piece 501 is connected with the bottom of the pipe groove 402 through a second spring 501 a;

the end of the fixing member 502 is provided with a first slope 502 a.

It should be noted that both the first square groove 401 and the pipe groove 402 may have a groove structure having a square cross section.

It should be noted that the present invention is used in cooperation with a corresponding cabinet door 104b to be fixed, the cabinet door 104b is disposed at a door frame and hinged, an insertion slot is disposed at an end of the cabinet door 104b, and the first square slot 401 corresponds to the insertion slot.

Further, an unlocking piece 501 and a fixing piece 502 are arranged beside the built-in groove 104c, it should be noted that, in an initial state, the end of the fixing piece 502 extends out of the first square groove 401, and the portion of the end provided with the first inclined surface 502a is located in the built-in groove 104c, when the cabinet door 104b is closed, the cabinet door 104b contacts the first inclined surface 502a and pushes the fixing piece 502 into the first square groove 401, and after the slot 404a corresponds to the first square groove 401, the fixing piece 502 is inserted into the first square groove 401 to achieve locking under the pushing of the first spring 502 b.

In this embodiment, the fixing member 502 is used to fix the cabinet door 104b, so as to ensure the normativity of the control cabinet in the using process and some unnecessary confusion, the cabinet door 104b needs to be locked, and the unlocking needs to be performed after the user or the administrator swipes the card.

The fixing member 502 can also be switched to an unlocking mode under the condition of power loss, and under the condition of normal power on, the fixing member 502 is unlocked by an electric control or manually without a key, and needs to be unlocked by the key after power loss.

The unlocking member 501 is embedded in the pipe groove 402; the end of the unlocking piece 501 is connected with the bottom of the pipe groove 402 through a second spring 501 a; the unlocking piece 501 can be pressed, the end of the unlocking piece 501 extends out of the pipe groove 402 in the initial state, the second spring 501a is compressed after the pressing, and the unlocking piece 501 is popped out by the second spring 501a after the releasing.

Two sides of the fixing member 502 are provided with side grooves 502c, and one side edge of the side groove 502c is provided with a second inclined surface 502 d; one end of the unlocking piece 501 is provided with a third inclined surface 501b, and the unlocking piece 501 is provided with an end groove 501 c; the first through hole 501c is provided at the middle position of the unlocking member 501, and is offset from the side groove 502 c.

It should be noted that one end of the unlocking piece 501 provided with the third inclined surface 501b is embedded in the side groove 502c, and when the unlocking piece 501 is pressed, the third inclined surface 501b contacts the second inclined surface 502d, and the fixing piece 502 is pressed into the first groove 401, so that the cabinet door 104b can be opened.

Specifically, the cabinet body 104a is further provided with a limiting groove 401c, and the limiting groove 401c is communicated with the pipe groove 402 through a first through groove 401 d; the limiting groove 401c is arranged in parallel with the first square groove 401, and the limiting groove 401c is communicated with the first square groove 401 through a second through groove 401 e; the invention also comprises a pilot piece 503, wherein the pilot piece 503 comprises a limiting plate 503a and a clamping rod 503b arranged at the end part of the limiting plate 503a, the limiting plate 503a is embedded in the limiting groove 401c, the clamping rod 503b is embedded in the first through groove 401d, and the end part of the limiting plate 503a is provided with a third spring 503d connected with the bottom of the limiting groove 401 c; a through hole 503c is formed in the limiting plate 503a in a penetrating manner, a pull rod 502e is arranged on the side surface of the fixing member 502, and the pull rod 502e penetrates through the second through groove 401e and is arranged in the through hole 503 c; the cabinet body 104a is further provided with a first electromagnet 401h and a second electromagnet 401j, the first electromagnet 401h corresponds to the first square groove 401, and the second electromagnet 401j corresponds to the limiting groove 401 c.

Note that the end of the fixing member 502 and the end of the stopper plate 503a are both provided with a magnetic material.

In the initial state, the end of the catch rod 503b is in the tube groove 402, and the end of the catch rod 503b is inserted into the end groove 501c, so that the unlocking member 501 cannot be pressed.

It should be noted that the pilot part 503 is used for switching the working state of the fixing part 502, when the second electromagnet 401j is powered on first, the limiting plate 503a is attracted and pulled down, the end of the clamping rod 503b exits the pipe groove 402 and completely sinks into the first through groove 401d, when the fixing part 502 is attracted and retracted into the first through groove 401, the cabinet door 104b can be opened; if the first electromagnet 401h fails and cannot be electrically controlled, the unlocking piece 501 is not limited to operate because the clamping rod 503b is not located in the pipe groove 402, so that the unlocking piece 501 can be manually pressed, the unlocking piece 501 drives the fixing piece 502 to tighten in the first square groove 401, and the cabinet door 104b can be opened at the same time.

Referring to fig. 4, the length of the through hole 503c is greater than the thickness of the pull rod 502e, that is, the pull rod 502e can move in the through hole 503c relative to the limit plate 503a, specifically, in an initial state, the pull rod 502e is located at the right edge of the through hole 503c, so that the fixing member 502 does not move along with the movement when the limit plate 503a moves to the right, and the fixing member 502 moves the limit plate 503a to the right, so that the electric unlocking can be controlled by the first electromagnet 401h when the second electromagnet 401j fails without power failure.

Furthermore, a first rotary groove 401f and a second rotary groove 401g are arranged in the side wall of the cabinet body 104a, the first rotary groove 401f is communicated with the second rotary groove 401g, the first rotary groove 401f is communicated with the first square groove 401, the invention also comprises a lock core 504, a rotary disc 504a is arranged at the end part of the lock core 504, a pawl 504b is arranged on the circumferential side surface of the rotary disc 504a, and a ratchet 502f is arranged on the side surface of the fixing member 502.

It should be noted that the pawl 504b is connected to the turntable 504a by a hinge and the inner side of the pawl 501b is connected to the turntable 504a by a spring, i.e. when the pawl 504b is pressed towards the center of the turntable 504a, the pawl 504b rotates and the pressure is removed and the spring will again spring the pawl 504b outwards.

When the system is powered off integrally, the first electromagnet 401h and the second electromagnet 401j are powered off and cannot work, and at the moment, the key is needed to unlock the control fixing piece 502 to act, specifically, the structures of the lock cylinder 504 and the first rotary groove 401f are consistent with the internal structure of the existing lock, namely, the lock cylinder 504 can rotate relative to the first rotary groove 401f after a correct key is inserted into the lock cylinder 504, otherwise, the lock cylinder 504 cannot rotate.

When the lock core 504 can rotate, the pawl 504b will drive the ratchet 502f to move together, so that the fixing member 502 is retracted into the first slot 401 to unlock. The ratchet bar and pawl are configured such that in the energized state, the dial 504a does not interfere with the movement of the mount 502.

It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. The utility model provides an offshore wind-powered electricity generation fan control system which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the tower body assembly (100) comprises a machine room (101) and a tower barrel (102), the machine room (101) is arranged at the top of the tower barrel (102), a yaw piece (103) is arranged at the top of the tower barrel (102) and connected with the machine room (101), and a control cabinet (104) is arranged at the bottom in the tower barrel (102);

the power generation assembly (200) comprises blades (201), a hub (202), a variable pitch piece (203), a main shaft (204) and a power generator (205), wherein the main shaft (204) is arranged in the cabin (101) and connected with the power generator (205), the hub (202) is connected with the main shaft (204), the blades (201) are distributed on the periphery of the hub (202), and the variable pitch piece (203) is connected with the blades (201).

2. The offshore wind turbine control system of claim 1, wherein: the main shaft (204) is connected with a gearbox (206), and the gearbox (206) is connected with a generator (205) through a high-speed shaft (207).

3. Offshore wind turbine control system according to claim 1 or 2, characterized in that: a brake (207a) is arranged on the high-speed shaft (207); an electric control cabinet (205a) is connected to the generator (205).

4. The offshore wind turbine control system of claim 3, wherein: the power distribution assembly (300) comprises a rotor-side converter (301) and a grid-side converter (302), the rotor-side converter (301) is connected with the generator (205) and the control cabinet (104), and the grid-side converter (302) is connected with the rotor-side converter (301) and the control cabinet (104).

5. The offshore wind turbine control system of claim 4, wherein: the variable-pitch piece (203) is connected with a variable-pitch motor (203 a).

6. The offshore wind turbine control system of claim 5, wherein: the control cabinet (104) comprises a cabinet body (104a) and a cabinet door (104b), a built-in groove (104c) is arranged in the cabinet body (104a), and a protection piece (104d), a power supply assembly (104e) and a lightning arrester (104f) are arranged in the built-in groove (104 c);

the cabinet door (104b) is arranged at the opening of the built-in groove (104 c).

7. The offshore wind turbine control system according to any one of claims 4 to 6, wherein: one side of the cabinet door (104b) is hinged with the cabinet body (104b), and a lock hole (A) is formed in the side face of the cabinet door (104 b).

8. The offshore wind turbine control system of claim 7, wherein: the side wall of the built-in groove (104c) is inwards provided with a first square groove (401), the cabinet body (104a) is inwards provided with a pipe groove (402) from the side surface, and the first square groove (401) is vertically communicated with the pipe groove (402).

9. The offshore wind turbine control system of claim 8, wherein: the pipe groove structure is characterized by further comprising an unlocking piece (501) and a fixing piece (502), wherein the fixing piece (502) is embedded in the first square groove (401), the end portion of the fixing piece (502) is connected with the bottom of the first square groove (401) through a first spring (502b), the unlocking piece (501) is embedded in the pipe groove (402), and the end portion of the unlocking piece (501) is connected with the bottom of the pipe groove (402) through a second spring (501 a);

the end of the fixing piece (502) is provided with a first inclined surface (502 a).

10. Offshore wind turbine control system according to claim 8 or 9, characterized in that: both sides are provided with side groove (502c) on mounting (502), side groove (502c) one side edge is provided with second inclined plane (502 d).