An intelligent stability protection system for a floating wind turbine generator set and its control method

Abstract

The present invention discloses an intelligent stability preservation system for a floating wind power generation unit, which comprises a floating body foundation, a ballast water unit, a bilge water unit, a ventilation unit, a liquid level telemetry unit and a control unit; the floating body foundation includes three pipe arms, and inside each pipe arm, an empty tank, a ballast water tank and a trimming water tank are sequentially arranged from the connection end to the end; the ballast water unit is connected to each ballast water tank and trimming water tank through multiple pipelines respectively; the bilge water unit is connected to each empty tank through multiple pipelines respectively; the ventilation unit is connected to each empty tank, ballast water tank and trimming water tank through multiple ventilation pipes respectively; there are multiple liquid level telemetry units, which are respectively arranged in each empty tank, ballast water tank and trimming water tank; the control unit is communicatively connected to the ballast water unit, the bilge water unit and the liquid level telemetry unit respectively. The present invention can effectively overcome the situation that the ocean environment causes excessive inclination and sway of the floating wind power generation unit, resulting in the shutdown of the unit and the inability to continuously work.

Description

Technical Field

[0001] The present invention relates to the technical field of floating wind turbines, and in particular to an intelligent stability protection system and a control method for a floating wind turbine. Background Art

[0002] The ocean has rich wind energy resources due to its vast sea area. In recent years, with the strong development of the country, the traditional wind turbine farms installed in the offshore areas have approached saturation. The deep sea has more abundant wind energy resources and the advantage of being far from the scope of human activities. However, due to its unstable environment, few wind turbines are arranged. Therefore, making full use of the wind energy resources in the deep sea not only reduces the demand for non-renewable energy but also improves the utilization rate of wind energy resources. At the same time, for some offshore power consumption scenarios far from the power grid, such as offshore oil and gas platforms, since the cost of laying special cables is too high, using floating wind turbines not only has a relatively lower power consumption cost compared to laying special cables but also can meet the requirements of emission reduction and carbon neutrality.

[0003] As the saying goes, there is no wave without wind. The deep-sea environment enables wind turbines to obtain stable and unlimited wind energy resources, but the entire wind turbine is also subjected to the impact of sea waves and ocean currents. These factors will have pitching, rolling and oscillating effects on the wind turbine, which will lead to the shutdown of the unit and the inability to continue working, thus affecting the working efficiency of the wind turbine. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an intelligent stability protection system and a control method for a floating wind turbine, which can effectively overcome the excessive inclination and shaking of the floating wind turbine caused by the ocean environment, thus preventing the wind turbine from shutting down and being unable to continue working.

[0005] The purpose of the present invention can be achieved by adopting the following technical solutions:

[0006] An intelligent stability protection system for a floating wind turbine includes a floating body foundation, a ballast water unit, a bilge water unit, a ventilation unit, a liquid level telemetry unit and a control unit;

[0007] The floating body foundation includes an upwind pipe arm and two downwind pipe arms. One end of the three is connected to form a Y shape. Inside each pipe arm, an empty tank, a ballast water tank and a trimming water tank are arranged in sequence from the connection end to the end;

[0008] The ballast water unit is respectively connected to each ballast water tank and trimming water tank through multiple pipelines, and is used for ballasting and de-ballasting the ballast water tank and trimming water tank, and adjusting the loading amount of the trimming water tank according to the pitching and rolling state of the wind turbine, so as to repair the floating state of the wind turbine;

[0009] The bilge water unit is connected to each empty tank through multiple pipelines respectively, and is used to discharge the seawater that accidentally enters the empty tank;

[0010] The ventilation unit is connected to each empty tank, ballast tank and trimming tank through multiple ventilation pipes respectively, and is used to keep each compartment communicating with the outside atmosphere to ensure the air pressure balance of each compartment;

[0011] There are multiple liquid level telemetry units, which are respectively arranged in each empty tank, ballast tank and trimming tank, and are used to obtain the liquid level information of each compartment and the longitudinal and transverse inclination state information of the wind turbine generator set, and provide the information to the control unit;

[0012] The control unit is respectively communicatively connected to the ballast water unit, the bilge water unit and the liquid level telemetry unit, and is used to analyze the best stability maintenance plan according to the longitudinal and transverse inclination state information of the wind turbine generator set and adjust the loading amount of the trimming tank by controlling the valve states of the ballast water unit to realize the floating state repair of the wind turbine generator set, and control the valve states of the bilge water unit according to the liquid level information of the empty tank, and then discharge the seawater in the empty tank.

[0013] Furthermore, the upwind boom and the two downwind booms are connected by a central connector. The tubular pile of the wind turbine generator set is arranged on the top of the central connector. The empty tank is used to provide the buoyancy demand of the wind turbine generator set. The ballast tank is used as the ballast of the wind turbine generator set, and its loading amount is in a full tank state when the wind turbine generator set is working. The trimming tank is used as a compartment for adjusting the longitudinal and transverse inclination state of the wind turbine generator set, and loads a set amount of seawater according to the stability demand of the wind turbine generator set. The inside of the upwind boom is the first empty tank, the first ballast tank and the first trimming tank. The inside of one of the downwind booms is respectively the second empty tank, the second ballast tank and the second trimming tank. The inside of the other downwind boom is respectively the third empty tank, the third ballast tank and the third trimming tank.

[0014] Further, the ballast water unit includes a first ballast pump, a second ballast pump, a seawater valve chest, a ballast water filter, a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a sixth valve, a seventh valve, an eighth valve, a ninth valve, a tenth valve, an eleventh valve, a twelfth valve, a thirteenth valve, a fourteenth valve, a fifteenth valve, a sixteenth valve, a seventeenth valve, an eighteenth valve, a nineteenth valve and a twentieth valve. One end of the first valve is connected to the seawater valve chest through a pipeline, and the other end thereof is respectively connected to one end of the ballast water filter and the first drainage main pipe of the bilge water unit through pipelines. The other end of the ballast water filter is connected to one end of the second valve through a pipeline. The other end of the second valve is respectively connected to the second drainage main pipe of the bilge water unit, one end of the third valve, one end of the fifth valve, one end of the fifteenth valve, one end of the nineteenth valve and one end of the twentieth valve through pipelines. The other end of the third valve is connected to one end of the first ballast pump through a pipeline. The other end of the first ballast pump is connected to one end of the fourth valve through a pipeline. The other end of the fifth valve is connected to one end of the second ballast pump through a pipeline. The other end of the second ballast pump is connected to one end of the sixth valve through a pipeline. The other end of the sixth valve is respectively connected to the other end of the fourth valve, one end of the seventh valve and one end of the eighth valve through pipelines. The other end of the seventh valve is respectively connected to the first drainage main pipe of the bilge water unit and the other end of the first valve through pipelines. The other end of the eighth valve is respectively connected to one end of the sixteenth valve, one end of the seventeenth valve and one end of the eighteenth valve through pipelines. The other end of the fifteenth valve is respectively connected to the other end of the sixteenth valve, one end of the ninth valve and one end of the tenth valve through pipelines. The other end of the ninth valve is connected to the first ballast water tank of the floating body foundation through a pipeline. The other end of the tenth valve is connected to the first trimming water tank of the floating body foundation through a pipeline. The other end of the nineteenth valve is connected to the other end of the eighteenth valve through a pipeline. The other end of the eighteenth valve is respectively connected to one end of the thirteenth valve and one end of the fourteenth valve through pipelines. The other end of the thirteenth valve is connected to the third ballast water tank of the floating body foundation through a pipeline. The other end of the fourteenth valve is connected to the third trimming water tank of the floating body foundation through a pipeline. The other end of the twentieth valve is connected to the other end of the seventeenth valve through a pipeline. The other end of the seventeenth valve is respectively connected to one end of the eleventh valve and one end of the twelfth valve through pipelines. The other end of the eleventh valve is connected to the second ballast water tank of the floating body foundation through a pipeline. The other end of the twelfth valve is connected to the second trimming water tank of the floating body foundation through a pipeline.

[0015] Further, the bilge water unit includes a bilge water pump, a bilge water filter, a first drainage main pipe, a second drainage main pipe, a first bilge valve, a second bilge valve, a third bilge valve, a fourth bilge valve, a fifth bilge valve and a sixth bilge valve. One end of the first bilge valve is connected to one end of the bilge water filter and one end of the sixth bilge valve, and the other end is connected to one end of the bilge water pump. The other end of the bilge water pump is connected to one end of the second bilge valve through a pipeline. The other end of the second bilge valve is connected to the first drainage main pipe. The other end of the sixth bilge valve is connected to the second drainage main pipe. The other end of the bilge water filter is respectively connected to one end of the third bilge valve, one end of the fourth bilge valve and one end of the fifth bilge valve through pipelines. The other ends of the third bilge valve, the fourth bilge valve and the fifth bilge valve are respectively connected to the first empty compartment, the second empty compartment and the third empty compartment of the floating body foundation through pipelines.

[0016] Further, the ventilation unit includes a ventilation main pipe and a plurality of ventilation branch pipes. The number of the ventilation branch pipes is the same as and corresponds one by one to the number of the compartments of the floating body foundation. One ventilation branch pipe is connected to one compartment, that is, one end of each ventilation branch pipe is connected to the corresponding compartment, and the other end extends into the central connecting body of the wind turbine generator set, climbs upward into the tubular pile of the wind turbine generator set and is connected to the ventilation main pipe. The ventilation main pipe is connected to a ventilation head arranged outside the tubular pile.

[0017] Further, the liquid level telemetry unit includes three draft liquid pressure sensors, three high and low level float switch alarms and a plurality of liquid level pressure sensors. The three draft liquid pressure sensors are respectively arranged at the bottoms of three ballast water tanks of the floating body foundation. The pressure generated by the contact with the outside seawater through the draft liquid pressure sensors is converted into the height of the current layout point below the water surface. Then, a plane is formed by the three layout points to obtain the longitudinal and transverse inclination state information of the current wind turbine generator set. The three high and low level float switch alarms are respectively arranged in three empty compartments of the floating body foundation. One liquid level pressure sensor is arranged in each empty compartment. Two liquid level pressure sensors are arranged in each ballast water tank. Two liquid level pressure sensors are arranged in each ballast water adjustment tank. Each draft liquid pressure sensor, high and low level float switch alarm and liquid level pressure sensor are all connected to the control unit through cables. The liquid level height of each compartment is monitored through the liquid level pressure sensors.

[0018] Further, the control unit is arranged inside the tubular pile of the wind turbine generator set and is connected to the liquid level telemetry unit, the ballast water unit and the bilge water unit through cables.

[0019] A control method for an intelligent stability protection system of a floating wind turbine generator set includes:

[0020] After the wind turbine is launched into the water, the liquid level telemetry unit monitors the longitudinal and transverse inclination state information of the wind turbine based on the draft at three points. If the longitudinal and transverse inclination state information of the wind turbine is monitored within the set stability range, the system remains silent. If the longitudinal and transverse inclination state information of the wind turbine is monitored to exceed the set stability range, the control unit analyzes the optimal stability preservation plan in real time and outputs an operation instruction to the ballast water unit.

[0021] After the operation instruction is issued, the corresponding ballast pump and valve in the ballast water unit are opened to adjust the loading volume of the ballast tank. When the ballast pump pumps / drains seawater from the cabin, the cabin is connected to the atmosphere through the ventilation unit.

[0022] When the liquid level telemetry unit monitors that the longitudinal and transverse inclination state information of the wind turbine after load adjustment meets the stability requirements, the control unit issues a stop signal to close the corresponding ballast pump and valve.

[0023] Furthermore, the state of the empty cabin is monitored in real time through the liquid level telemetry unit. When the empty cabin is flooded, the bilge water unit is controlled by the control unit to drain the water in the empty cabin in time to ensure that the empty cabin can continuously provide the original buoyancy to meet the requirements of the wind turbine. If any empty cabin is accidentally damaged, the control unit analyzes and controls the ballast water unit to reduce the loading volume of the ballast tank, and the ballast tank provides buoyancy to repair the floating state of the wind turbine.

[0024] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0025] Adopting the intelligent stability preservation system and its control method of the present invention can effectively enhance the stability of the wind turbine, protect the floating wind turbine from the influence of the marine environment, and reduce the occurrence of shutdown and inability to continue working caused by the external environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a distribution diagram of each cabin inside the floating body foundation in the present invention.

[0027] Figure 2 It is a schematic external view of the floating body foundation in the present invention.

[0028] Figure 3 It is a schematic diagram of the principle of the ballast water unit in the present invention.

[0029] Figure 4 It is a schematic diagram of the principle of the bilge water unit in the present invention.

[0030] Figure 5 It is a schematic diagram of the principle of the ventilation unit in the present invention.

[0031] Figure 6 It is an installation schematic diagram of the control unit in the present invention.

[0032] Figure 7 This is the schematic diagram of the control unit in the present invention.

[0033] Figure 8 This is the layout diagram of the liquid level telemetry unit in the present invention.

[0034] Figure 9 This is the schematic diagram of the three-point draft monitoring of the liquid level telemetry unit in the present invention. Detailed implementation manners

[0035] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] As Figure 1 、 Figure 2 shown, this embodiment provides a floating wind turbine intelligent stability protection system, including a floating body foundation, a ballast water unit, a bilge water unit, a ventilation unit, a liquid level telemetry unit 5 and a control unit 6;

[0037] The floating body foundation includes an upwind boom 101, a downwind boom 102 and a downwind boom 103. One ends of the three are connected to form a Y shape. Inside each boom, there are successively arranged a void space, a ballast water tank and a trimming water tank from the connection end to the end.

[0038] The ballast water unit is respectively connected to each ballast water tank and trimming water tank through multiple pipelines, and is used for ballasting and deballasting the ballast water tanks and trimming water tanks, and adjusting the loading amount of the trimming water tank according to the longitudinal and transverse inclination states of the wind turbine, so as to perform floating state repair on the wind turbine;

[0039] The bilge water unit is respectively connected to each void space through multiple pipelines, and is used for discharging seawater that accidentally enters the void space.

[0040] The ventilation unit is respectively connected to each void space, ballast water tank and trimming water tank through multiple ventilation pipes, and is used for keeping each cabin in communication with the outside atmosphere to ensure the air pressure balance of each cabin;

[0041] There are multiple liquid level telemetry units, which are respectively arranged in each void space, ballast water tank and trimming water tank, and are used for obtaining the liquid level information of each cabin and the longitudinal and transverse inclination state information of the wind turbine, and providing the information to the control unit;

[0042] The control unit is communicatively connected to the ballast water unit, the bilge water unit, and the liquid level telemetry unit respectively, and is used to analyze the optimal stability maintenance plan based on the longitudinal and transverse inclination state information of the wind turbine generator, and adjust the loading amount of the trimming water tank by controlling the valve states of the ballast water unit, so as to realize the floating state repair of the wind turbine generator, and control the valve states of the bilge water unit according to the liquid level information of the empty tank, and then discharge the seawater in the empty tank.

[0043] The upwind boom 101, the downwind boom 102, and the downwind boom 103 are connected by a central connector 104, and the pile 7 of the wind turbine generator is arranged at the top of the central connector 104; the empty tanks are used to provide the buoyancy requirement of the wind turbine generator, and the specific quantity is configured according to the stability requirement of the project; the ballast water tanks are used as ballast stones of the wind turbine generator, and their loading amounts are in a full tank state when the wind turbine generator is working, and their loading amounts can also be reduced according to the specific state of the unit to obtain a certain amount of buoyancy; the trimming water tanks are used as compartments for adjusting the longitudinal and transverse inclination states of the wind turbine generator, and are loaded with a certain amount of seawater according to the stability requirement of the wind turbine generator; the inside of the upwind boom is the first empty tank, the first ballast water tank, and the first trimming water tank, and the inside of one of the downwind booms is the second empty tank, the second ballast water tank, and the second trimming water tank respectively, and the inside of the other downwind boom is the third empty tank, the third ballast water tank, and the third trimming water tank respectively.

[0044] The quantity and structural form of the above-mentioned trimming water tanks, ballast water tanks, and empty tanks can be designed and configured according to the overall stability requirements of different units, and this embodiment only represents one kind of compartment configuration scheme.

[0045] The ballast water unit has the functions of ballasting, deballasting, and trimming. Considering that the wind turbine generator does not often have the situations of ballasting and deballasting, and at the same time to ensure that the ballast and deballast functions will not be lost due to the failure of a single water pump, the ballast water unit in this embodiment is set to a design scheme in which the sum of the single displacements of 2 water pumps meets the total ballast and deballast displacements.

[0046] Such as Figure 3As shown, the ballast water unit specifically includes a first ballast pump, a second ballast pump, a seawater valve chest, a ballast water filter, a first valve BW1, a second valve BW2, a third valve BW3, a fourth valve BW4, a fifth valve BW5, a sixth valve BW6, a seventh valve BW7, an eighth valve BW8, a ninth valve BW9, a tenth valve BW10, an eleventh valve BW11, a twelfth valve BW12, a thirteenth valve BW13, a fourteenth valve BW14, a fifteenth valve BW15, a sixteenth valve BW16, a seventeenth valve BW17, an eighteenth valve BW18, a nineteenth valve BW19, and a twentieth valve BW20. One end of the first valve BW1 is connected to the seawater valve chest through a pipeline, and the other end is respectively connected to one end of the ballast water filter and the first drainage main pipe of the bilge water unit through pipelines. The other end of the ballast water filter is connected to one end of the second valve BW2 through a pipeline. The other end of the second valve BW2 is respectively connected to the second drainage main pipe of the bilge water unit, one end of the third valve BW3, one end of the fifth valve BW5, one end of the fifteenth valve BW15, one end of the nineteenth valve BW19, and one end of the twentieth valve BW20 through pipelines. The other end of the third valve BW3 is connected to one end of the first ballast pump through a pipeline. The other end of the first ballast pump is connected to one end of the fourth valve BW4 through a pipeline. The other end of the fifth valve BW5 is connected to one end of the second ballast pump through a pipeline. The other end of the second ballast pump is connected to one end of the sixth valve BW6 through a pipeline. The other end of the sixth valve BW6 is respectively connected to the other end of the fourth valve BW4, one end of the seventh valve BW7, and one end of the eighth valve BW8 through pipelines. The other end of the seventh valve BW7 is respectively connected to the first drainage main pipe of the bilge water unit and the other end of the first valve BW1 through pipelines. The other end of the eighth valve BW8 is respectively connected to one end of the sixteenth valve BW16, one end of the seventeenth valve BW17, and one end of the eighteenth valve BW18 through pipelines. The other end of the fifteenth valve BW15 is respectively connected to the other end of the sixteenth valve BW16, one end of the ninth valve BW9, and one end of the tenth valve BW10 through pipelines. The other end of the ninth valve BW9 is connected to the first ballast water tank of the floating body foundation through a pipeline. The other end of the tenth valve BW10 is connected to the first trimming water tank of the floating body foundation through a pipeline. The other end of the nineteenth valve BW19 is connected to the other end of the eighteenth valve BW18 through a pipeline. The other end of the eighteenth valve BW18 is respectively connected to one end of the thirteenth valve BW13 and one end of the fourteenth valve BW14 through pipelines. The other end of the thirteenth valve BW13 is connected to the third ballast water tank of the floating body foundation through a pipeline. The other end of the fourteenth valve BW14 is connected to the third trimming water tank of the floating body foundation through a pipeline. The other end of the twentieth valve BW20 is connected to the other end of the seventeenth valve BW17 through a pipeline,The other end of the seventeenth valve BW17 is respectively connected to one end of the eleventh valve BW11 and one end of the twelfth valve BW12 through pipelines. The other end of the eleventh valve BW11 is connected to the second ballast water tank of the floating body foundation through a pipeline. The other end of the twelfth valve BW12 is connected to the second trimming water tank of the floating body foundation through a pipeline.

[0047] Before the wind turbine generator operates, the ballast water unit is controlled by the control unit to load seawater into the ballast water tank. After the seawater is loaded into the ballast water tank, the liquid level pressure sensor in the ballast water tank continuously detects the liquid level height inside the tank. When the liquid level height reaches the set loading height, the corresponding ballast pump and valve are closed. The loading of the trimming water tank is similar to that of the ballast water tank, but it needs to be loaded according to the real-time longitudinal and transverse inclination states of the wind turbine generator fed back by the control unit. When the balance state is reached, the corresponding ballast pump and valve are closed. When a certain amount of longitudinal and transverse inclination angles of the wind turbine generator affect the normal operation, the instruction issued by the control unit only trims the trimming water tank.

[0048] The ballast conditions of the trimming water tank and the ballast water tank can be realized in two forms. The first is gravity loading. Since the self-weight of the wind turbine generator has submerged the floating body foundation in seawater after it is launched, the water tank part is already below the sea level. Therefore, only the first valve BW1, the second valve BW2, the fifteenth valve BW15, the sixteenth valve BW16, the seventeenth valve BW17, and the eighteenth valve BW18 connecting to the seawater valve box need to be opened, and the ninth valve BW9 to the fourteenth valve BW14 connecting to each trimming water tank and ballast water tank are opened according to the loading requirements to achieve the purpose of loading. The second is pumping loading. Open the first valve BW1, the second valve BW2, the third valve BW3, the first ballast pump, and the fourth valve BW4, and simultaneously open the fifth valve BW5, the second ballast pump, and the sixth valve BW6. Then open the eighth valve BW8, the sixteenth valve BW16, the seventeenth valve BW17, and the eighteenth valve BW18, and open the ninth valve BW9 to the fourteenth valve BW14 connecting to each trimming water tank and ballast water tank according to the loading requirements to achieve the purpose of loading.

[0049] The discharging condition of the trimming water tank and the ballast water tank is achieved by the pumping form. Taking the first ballast water tank as an example, it is described as follows. Open the ninth valve BW9, the fifteenth valve BW15, the third valve BW3, the first ballast pump, the fourth valve BW4, the seventh valve BW7, and the first valve BW1, and pump the seawater in the tank outside the unit by the water pump. The pumping of the first ballast water tank by the second ballast pump has the same control logic as the first ballast pump. According to the discharging requirements of stability, all water tanks can be pumped separately or jointly by the first ballast pump or the second ballast pump. Considering that the upper part of the floating body foundation of the wind turbine generator is a pipe pile, if the discharged water climbs from the floating body foundation to the upper part of the pipe pile for discharging, the water stored in the vertical pipe end will not only have a certain impact on the stability center of gravity, but also the water pump performance is required for the drainage climb, and the economic benefit is not high. Therefore, the seawater discharge pipe outside the hull of the water tank of the present invention (specifically, the pipeline between the first valve BW1 and the seventh valve BW7) and the water intake pipe (specifically, the pipeline between the first valve BW1 and the ballast water filter) can share a common sea connection pipe, reduce the openings to ensure the structural strength, and optimize the design to reduce waste.

[0050] The trimming function of the ballast water unit is only for three trimming water tanks. The trimming function is introduced by way of example below. When it is necessary to transfer the ballast water of the first trimming water tank to the second trimming water tank, the tenth valve BW10, the fifteenth valve BW15, the third valve BW3, the first ballast pump, the fourth valve BW4, the eighth valve BW8, the seventeenth valve BW17, and the twelfth valve BW12 can be opened, and the trimming requirement is completed by pumping. The trimming of the second ballast pump is similar to that of the first ballast pump and will not be described here. The trimming actions of the remaining trimming water tanks are similar to the examples and will not be described here.

[0051] The ballasting, discharging, and trimming functions in the above ballast water unit can all be carried out simultaneously by opening the first and second ballast pumps. When one of the ballast pumps fails, the other ballast pump can also ensure the operation of the ballast water unit. At the same time, a drainage pipeline (i.e., the second drainage main pipe) from the bilge water unit is added to the ballast water unit of the present invention, and the optimized design reduces the redundant configuration of the bilge water unit and reduces the project cost.

[0052] The function of the bilge water unit is to discharge the accidental water ingress in the empty tank to ensure that the buoyancy provided by the empty tank can meet the buoyancy requirements of the wind turbine generator. As Figure 4As shown in the figure, it specifically includes a bilge pump, a bilge water filter, a first drainage main pipe, a second drainage main pipe, a first bilge valve BG1, a second bilge valve BG2, a third bilge valve BG3, a fourth bilge valve BG4, a fifth bilge valve BG5, and a sixth bilge valve BG6. One end of the first bilge valve BG1 is connected to one end of the bilge water filter and one end of the sixth bilge valve BG6, and the other end is connected to one end of the bilge pump. The other end of the bilge pump is connected to one end of the second bilge valve BG2 through a pipeline. The other end of the second bilge valve BG2 is connected to the first drainage main pipe. The other end of the sixth bilge valve BG6 is connected to the second drainage main pipe. The other end of the bilge water filter is respectively connected to one end of the third bilge valve BG3, one end of the fourth bilge valve BG4, and one end of the fifth bilge valve BG5 through pipelines. The other ends of the third bilge valve BG3, the fourth bilge valve BG4, and the fifth bilge valve BG5 are respectively connected to the first empty compartment, the second empty compartment, and the third empty compartment of the floating body foundation through pipelines.

[0053] To avoid the situation of reduced or lost buoyancy caused by the impact and accidental leakage of the empty compartment. When the empty compartment accidentally takes in water, the high and low level float switch alarm 502 arranged in the empty compartment sends a signal to the control unit in time. The control unit then opens the corresponding valves and the bilge pump of the bilge water unit. The bilge pump pumps the seawater that has entered the empty compartment out of the wind turbine generator until the water level in the empty compartment decreases to the low level value of the high and low level float switch alarm 502. The high and low level float switch alarm 502 feeds back the signal to the control unit to close the corresponding valves and the bilge pump.

[0054] The following takes the accidental water intake of the first empty compartment as an example for description. When the first empty compartment takes in water, open the third valve BW3 of the ballast water unit, turn on the bilge pump and the corresponding bilge valves, and the seawater is discharged to the seawater valve box through the first drainage main pipe. If the bilge pump fails, it is pumped out by the second drainage main pipe through the first ballast pump or the second ballast pump. Considering that the configuration of two ballast pumps in the ballast water unit can meet the displacement requirements of the bilge water unit, therefore, in the design of the present invention, the pump configuration is optimized. The bilge water unit uses one bilge pump. When the bilge pump fails, any one of the ballast pumps in the ballast water unit is enabled for redundant replacement.

[0055] Such as Figure 5As shown, the ventilation unit includes a main ventilation pipe 401 and a plurality of ventilation branch pipes 402. The number of the ventilation branch pipes 402 is consistent with and corresponds one by one to the number of the compartments of the floating body foundation. One ventilation branch pipe 402 is connected to one compartment, that is, one end of each ventilation branch pipe 402 is connected to the top of the corresponding compartment, and the other end extends into the central connection body 104 of the wind turbine generator, climbs upward into the tubular pile 7 of the wind turbine generator and is connected to the main ventilation pipe 401. The main ventilation pipe 401 is connected to a ventilation head 9 on an outer platform 8 outside the tubular pile 7. When the water tank is loaded or unloaded, positive or negative air pressure pumped by a pump will be generated in the compartment. At this time, the ventilation branch pipe 402 arranged at the top of the compartment and communicating with the outside atmosphere plays a role in balancing the pressure, avoiding damaging the strength of the compartment structure due to positive or negative air pressure, and ensuring the smooth progress of loading and unloading at the same time.

[0056] The following takes the first ballast water tank as an example for description: A ventilation branch pipe 402 is arranged at the top of the first ballast water tank. The ventilation branch pipe 402 sequentially passes through the first ballast water tank, the first empty compartment and enters the central connection body, then climbs to the tubular pile area to connect to the main ventilation pipe 401, and the main ventilation pipe 401 is connected to the ventilation head at the outer platform of the tubular pile to achieve the purpose of balancing the air pressure in the compartment. Among them, the pipeline passing through the first ballast water tank uses a sleeve joint as a connecting piece. When the present invention is designed and considers that one ventilation head is arranged for each of the 9 compartments, 9 through-wall penetrations and 9 ventilation heads will be arranged on the tubular pile wall, which will reduce the overall strength of the tubular pile. Therefore, a main ventilation pipe 401 is arranged above the maximum draft line of the wind turbine generator and one ventilation head is used to meet the ventilation requirements of all compartments. This solution not only reduces 9 through-wall penetrations and 9 ventilation heads to 1 through-wall penetration and 1 ventilation head, which can effectively reduce the project construction cost, but also greatly reduces the number of holes opened on the tubular pile wall, ensuring the overall structural strength of the tubular pile.

[0057] As Figure 6 、 Figure 7 shown, the control unit 6 is arranged in the main control unit 10 of the tubular pile 7 of the wind turbine generator, and the height position needs to be higher than the highest draft line to avoid the loss of system function caused by possible water inlet accidents. It is connected to each valve of the liquid level telemetry unit 5, the ballast water unit and the bilge water unit through a cable 12.

[0058] As Figure 8As shown in the figure, the liquid level telemetry unit specifically includes three draft liquid pressure sensors 501, three high and low level float switch alarms 502, and multiple liquid level pressure sensors 503. Their signal single modules can be integrated into the main control unit of the pipe pile. The three draft liquid pressure sensors 501 are respectively arranged at the bottoms of the three ballast water tanks of the floating body foundation. The pressure generated by the contact between the draft liquid pressure sensors 501 and the external seawater is converted into the height of the current layout point below the water surface. Then, a plane is formed through the three layout points to obtain the longitudinal and transverse inclination state information of the current wind turbine generator set. The three high and low level float switch alarms 502 are respectively arranged in the three empty tanks of the floating body foundation. One liquid level pressure sensor 503 is arranged in each empty tank, two liquid level pressure sensors 503 are arranged in each ballast water tank, and two liquid level pressure sensors 503 are arranged in each draft water tank. Each draft liquid pressure sensor 501, high and low level float switch alarm 502, and liquid level pressure sensor 503 are connected to the control unit through cables, and the liquid level height of each compartment is monitored by the liquid level pressure sensor 503.

[0059] When the ballast water tank and the draft water tank need to be ballasted or deballasted, the liquid level pressure sensors 503 arranged in the water tanks can monitor the liquid level height of the compartments in real time. When the empty tank accidentally floods and the liquid level reaches the high value of the float switch of the high and low level float switch alarm 502, a signal to open the valve and start the pump is triggered to the control unit. The control unit outputs an instruction to the bilge water unit. At the same time, the liquid level pressure sensor 503 arranged in the empty tank is used to monitor the rising height of the liquid level in the compartment in real time. When the water in the empty tank is pumped and drained to the low value of the float switch of the high and low level float switch alarm 502, a signal to stop the pump and close the valve is triggered to the control unit. The control unit outputs an instruction to the bilge water unit.

[0060] It should be noted that the present invention configures a three-point draft monitoring function in the liquid level telemetry unit, that is, draft liquid pressure sensors 501 communicating with the sea are arranged at the distal ends of the three pipe arms respectively. The probe of the draft liquid pressure sensor 501 contacts the external seawater, and the height between the draft liquid pressure sensor 501 and the sea level is obtained through the pressure exerted by the seawater, so as to obtain the longitudinal and transverse inclination state of the entire unit.

[0061] Taking the first ballast water tank as an example for the liquid level monitoring of the draft water tank and the ballast water tank, when the first ballast water tank needs to load seawater, it can be carried out according to the loading process of the ballast water unit. The liquid level pressure sensor 503 arranged in the first ballast water tank can continuously monitor the liquid level change of the compartment. When the liquid level pressure sensor 503 detects that the ballast water height reaches the set compartment liquid level, the liquid level pressure sensor 503 feeds back the compartment liquid level height to the control unit, and the control unit issues an instruction to close the corresponding valves and ballast pumps. The deballasting of the first ballast water tank is the reverse operation and will not be elaborated here.

[0062] Taking the first empty tank as an example for the liquid level monitoring of the empty tank, when the first empty tank is filled with water, the high-level float ball of the float switch of the high and low level float switch alarm 502 inside it floats to the high water level and triggers the water inlet signal. The high and low level float switch alarm 502 feeds back the signal to the control unit, and then the control unit issues an instruction to turn on the bilge pump and the corresponding valves of the bilge water unit. After the bilge pump pumps out the water inlet of the first empty tank, the liquid level gradually drops. When the liquid level drops to the low water level and triggers a signal, the high and low level float switch alarm 502 feeds back the signal to the control unit, and then the control unit issues an instruction to turn off the bilge pump and the corresponding valves. The liquid level pressure sensors 503 arranged in each empty tank are mainly used to monitor the current liquid level height of the cabin when the empty tank has continuous water inlet.

[0063] As Figure 9 shown, the three-point draft monitoring is specifically as follows: The pressure generated by any one of the draft liquid pressure sensors 501 in contact with the outside seawater is converted into the height of the current layout point below the water surface. Combining the layout points corresponding to the other 2 draft liquid pressure sensors 501, a plane is formed by the three layout points to obtain the longitudinal and transverse inclination state information of the current unit. When it is detected that the draft at the upwind end is deeper, the control unit issues an instruction to start the ballast water unit to adjust the ballast water of the first ballast tank until the wind turbine generator reaches overall balance and then issues a stop instruction.

[0064] This embodiment also provides a control method for the intelligent stability preservation system of the above floating wind turbine generator, including:

[0065] After the wind turbine generator is launched into the water, the liquid level telemetry unit monitors the longitudinal and transverse inclination state information of the wind turbine generator according to the three-point draft. If the longitudinal and transverse inclination state information of the wind turbine generator is within the set stability range, the system remains silent. If the longitudinal and transverse inclination state information of the wind turbine generator exceeds the set stability range, the control unit analyzes the optimal stability preservation plan in real time and outputs an operation instruction to the ballast water unit;

[0066] After the operation instruction is issued, the corresponding ballast pump and valve in the ballast water unit are opened to adjust the loading amount of the ballast tank. When the ballast pump pumps in / out seawater from the cabin, the ventilation unit connects the cabin with the atmosphere to keep the cabin air pressure balanced, offsetting the positive or negative pressure generated by the ballast pump during pumping and discharging, and the air pressure balance in the cabin is more conducive to the water pumping and discharging action of the water pump;

[0067] When the liquid level telemetry unit monitors that the longitudinal and transverse inclination state information of the wind turbine generator after ballast adjustment meets the stability requirements, the control unit issues a stop signal to close the corresponding ballast pump and valve.

[0068] During the operation of the unit, the status of the empty tank is monitored in real time through the liquid level telemetry unit. When the empty tank is flooded, the bilge water unit is controlled by the control unit to drain the water in the empty tank in time, ensuring that the empty tank can continuously provide the original buoyancy required by the wind turbine generator. If any empty tank is monitored to be accidentally damaged, the empty tank loses its buoyancy-providing function. At this time, the control unit automatically analyzes which ballast tank's seawater should be drained to make up for the unstable floating state of the wind turbine generator caused by the lack of buoyancy in the damaged empty tank. By reducing the loading volume of this ballast tank, the ballast tank provides buoyancy, thereby repairing the floating state of the wind turbine generator.

[0069] In summary, the present invention monitors the longitudinal and transverse inclination and draft status of the wind turbine generator by using a number of pressure sensors, and then the control unit issues a stability control instruction to achieve the floating state repair of the wind turbine generator. By setting the maximum longitudinal and transverse inclination angles and the maximum and minimum draft depths allowed for the wind turbine generator, when the signal fed back by the liquid level sensor to the control unit is an adjustment signal, the control unit analyzes the optimal stability maintenance plan and issues an adjustment instruction to correct the wind turbine generator to the optimal working state, ensuring that the wind turbine generator always operates continuously under the allowed floating state, avoiding shutdown or inability to continue working caused by the external environment. Moreover, during the operation of the wind turbine generator, the collection of longitudinal and transverse inclination information, data analysis, and regulation instructions are all automatically implemented by this fully intelligent system, shortening the time for manual adjustment of the floating state of the wind turbine generator and avoiding possible operation errors.

[0070] The above is only a preferred embodiment of the present invention for the patent, but the protection scope of the present invention for the patent is not limited thereto. Any person skilled in the art within the scope disclosed by the present invention for the patent, according to the technical solution of the present invention for the patent and its inventive concept, makes equivalent substitutions or changes, all belong to the protection scope of the present invention for the patent.

Claims

1. An intelligent stability protection system for a floating wind turbine generator set, characterized in that: It includes a floating body foundation, a ballast water unit, a bilge water unit, a ventilation unit, a liquid level telemetry unit and a control unit; The floating body foundation includes an upwind pipe arm and two downwind pipe arms. One end of the three is connected to form a Y shape. Inside each pipe arm, there are arranged a void space, a ballast water tank and a trimming water tank in sequence from the connecting end to the end. The upwind pipe arm and the two downwind pipe arms are connected by a central connector. The pile of the wind turbine generator is arranged on the top of the central connector. The void space is used to provide the buoyancy requirement of the wind turbine generator. The ballast water tank is used as the ballast of the wind turbine generator and is in a full tank state during the operation of the wind turbine generator. The trimming water tank is used as a chamber for adjusting the longitudinal and transverse inclination states of the wind turbine generator and loads a set amount of seawater according to the stability requirement of the wind turbine generator. Inside the upwind pipe arm, there are a first void space, a first ballast water tank and a first trimming water tank. Inside one of the downwind pipe arms, there are respectively a second void space, a second ballast water tank and a second trimming water tank. Inside the other downwind pipe arm, there are respectively a third void space, a third ballast water tank and a third trimming water tank; The ballast water unit is connected to each ballast water tank and trimming water tank through multiple pipelines, and is used for ballasting and deballasting the ballast water tank and trimming water tank, and adjusting the loading amount of the trimming water tank according to the longitudinal and transverse inclination states of the wind turbine generator, so as to repair the floating state of the wind turbine generator; The bilge water unit is connected to each void space through multiple pipelines and is used for discharging seawater that accidentally enters the void space; The ventilation unit is connected to each void space, ballast water tank and trimming water tank through multiple ventilation pipes, and is used to keep each chamber communicating with the outside atmosphere to ensure the air pressure balance of each chamber; There are multiple liquid level telemetry units, which are respectively arranged in each void space, ballast water tank and trimming water tank, and are used to obtain the liquid level information of each chamber and the longitudinal and transverse inclination state information of the wind turbine generator, and provide the information to the control unit. The liquid level telemetry unit includes three draft liquid pressure sensors, three high and low level float switch alarms and multiple liquid level pressure sensors. The three draft liquid pressure sensors are respectively arranged at the bottoms of the three trimming water tanks of the floating body foundation. The pressure generated by the contact with the outside seawater through the draft liquid pressure sensors is converted into the height of the current arrangement point below the water surface. Then, a plane is formed by the three arrangement points to obtain the longitudinal and transverse inclination state information of the current wind turbine generator. The three high and low level float switch alarms are respectively arranged in the three void spaces of the floating body foundation. One liquid level pressure sensor is arranged in each void space, two liquid level pressure sensors are arranged in each ballast water tank, and two liquid level pressure sensors are arranged in each trimming water tank. Each draft liquid pressure sensor, high and low level float switch alarm and liquid level pressure sensor are connected to the control unit through cables, and the liquid level height of each chamber is monitored through the liquid level pressure sensors; The control unit is communicatively connected to the ballast water unit, the bilge water unit, and the liquid level telemetry unit respectively, and is used to analyze the optimal stability maintenance plan according to the longitudinal and transverse inclination state information of the wind turbine generator, and adjust the loading amount of the ballast water tank by controlling the valve states of the ballast water unit, so as to realize the floating state repair of the wind turbine generator, and control the valve states of the bilge water unit according to the liquid level information of the empty tank, and then discharge the seawater in the empty tank.

2. The intelligent stability protection system for the floating wind turbine generator set according to claim 1, wherein: The ballast water unit includes a first ballast pump, a second ballast pump, a seawater valve chest, a ballast water filter, a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a sixth valve, a seventh valve, an eighth valve, a ninth valve, a tenth valve, an eleventh valve, a twelfth valve, a thirteenth valve, a fourteenth valve, a fifteenth valve, a sixteenth valve, a seventeenth valve, an eighteenth valve, a nineteenth valve and a twentieth valve. One end of the first valve is connected to the seawater valve chest through a pipeline, and the other end thereof is respectively connected to one end of the ballast water filter and the first drainage main pipe of the bilge water unit through pipelines. The other end of the ballast water filter is connected to one end of the second valve through a pipeline. The other end of the second valve is respectively connected to the second drainage main pipe of the bilge water unit, one end of the third valve, one end of the fifth valve, one end of the fifteenth valve, one end of the nineteenth valve and one end of the twentieth valve through pipelines. The other end of the third valve is connected to one end of the first ballast pump through a pipeline. The other end of the first ballast pump is connected to one end of the fourth valve through a pipeline. The other end of the fifth valve is connected to one end of the second ballast pump through a pipeline. The other end of the second ballast pump is connected to one end of the sixth valve through a pipeline. The other end of the sixth valve is respectively connected to the other end of the fourth valve, one end of the seventh valve and one end of the eighth valve through pipelines. The other end of the seventh valve is respectively connected to the first drainage main pipe of the bilge water unit and the other end of the first valve through pipelines. The other end of the eighth valve is respectively connected to one end of the sixteenth valve, one end of the seventeenth valve and one end of the eighteenth valve through pipelines. The other end of the fifteenth valve is respectively connected to the other end of the sixteenth valve, one end of the ninth valve and one end of the tenth valve through pipelines. The other end of the ninth valve is connected to the first ballast water tank of the floating body foundation through a pipeline. The other end of the tenth valve is connected to the first trimming water tank of the floating body foundation through a pipeline. The other end of the nineteenth valve is connected to the other end of the eighteenth valve through a pipeline. The other end of the eighteenth valve is respectively connected to one end of the thirteenth valve and one end of the fourteenth valve through pipelines. The other end of the thirteenth valve is connected to the third ballast water tank of the floating body foundation through a pipeline. The other end of the fourteenth valve is connected to the third trimming water tank of the floating body foundation through a pipeline. The other end of the twentieth valve is connected to the other end of the seventeenth valve through a pipeline. The other end of the seventeenth valve is respectively connected to one end of the eleventh valve and one end of the twelfth valve through pipelines. The other end of the eleventh valve is connected to the second ballast water tank of the floating body foundation through a pipeline. The other end of the twelfth valve is connected to the second trimming water tank of the floating body foundation through a pipeline.

3. The intelligent stability protection system of the floating wind turbine generator set according to claim 1, wherein: The bilge water unit includes a bilge water pump, a bilge water filter, a first drainage main pipe, a second drainage main pipe, a first bilge valve, a second bilge valve, a third bilge valve, a fourth bilge valve, a fifth bilge valve and a sixth bilge valve. One end of the first bilge valve is connected to one end of the bilge water filter and one end of the sixth bilge valve, and the other end thereof is connected to one end of the bilge water pump. The other end of the bilge water pump is connected to one end of the second bilge valve through a pipeline. The other end of the second bilge valve is connected to the first drainage main pipe. The other end of the sixth bilge valve is connected to the second drainage main pipe. The other end of the bilge water filter is respectively connected to one end of the third bilge valve, one end of the fourth bilge valve and one end of the fifth bilge valve through pipelines. The other ends of the third bilge valve, the fourth bilge valve and the fifth bilge valve are respectively connected to the first empty compartment, the second empty compartment and the third empty compartment of the floating body foundation through pipelines.

4. The intelligent stability protection system for a floating wind power generation unit according to claim 1, wherein: The ventilation unit includes a ventilation main pipe and a plurality of ventilation branch pipes. The number of the ventilation branch pipes is consistent with and corresponds to the number of the compartments of the floating body foundation one by one. One ventilation branch pipe is connected to one compartment, that is, one end of each ventilation branch pipe is connected to the corresponding compartment, and the other end extends into the central connecting body of the wind turbine generator set, climbs upward into the pipe pile of the wind turbine generator set and is connected to the ventilation main pipe. The ventilation main pipe is connected to a ventilation head arranged outside the pipe pile.

5. The intelligent stability protection system for a floating wind turbine generator set according to claim 1, characterized in that: The control unit is arranged inside the pipe pile of the wind turbine generator set and is connected to the liquid level telemetry unit, the ballast water unit and the bilge water unit through cables.

6. The control method of the intelligent stability protection system of the floating wind power generation unit according to any one of claims 1 to 5, characterized in that Including: After the wind turbine generator set is launched into the water, the liquid level telemetry unit monitors the longitudinal and transverse inclination state information of the wind turbine generator set according to the draft at three points. If the longitudinal and transverse inclination state information of the wind turbine generator set is monitored within the set stability range, the system remains silent. If the longitudinal and transverse inclination state information of the wind turbine generator set is monitored to exceed the set stability range, the control unit analyzes the optimal stability maintenance plan in real time and outputs an operation instruction to the ballast water unit. After the operation instruction is issued, the corresponding ballast pumps and valves in the ballast water unit are opened to adjust the loading amount of the ballast water tank. When the ballast pump pumps / drains seawater from the compartment, the compartment is connected to the atmosphere through the ventilation unit. When the liquid level telemetry unit monitors that the longitudinal and transverse inclination state information of the wind turbine generator set after adjustment meets the stability requirements, the control unit issues a stop signal to close the corresponding ballast pumps and valves.

7. The control method of the intelligent stability protection system for a floating wind power generation unit according to claim 6, characterized in that: The state of the empty compartment is monitored in real time through the liquid level telemetry unit. When the empty compartment is flooded, the bilge water unit is controlled by the control unit to drain the water in the empty compartment in time to ensure that the empty compartment can continuously provide the original buoyancy meeting the requirements of the wind turbine generator set. If any empty compartment is accidentally damaged, the control unit analyzes and controls the ballast water unit to reduce the loading amount of the ballast water tank, and the ballast water tank provides buoyancy to repair the floating state of the wind turbine generator set.

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