Semi-submersible type wave energy-wind energy integrated power generation platform and damping regulation and control method of damping regulation and control system of semi-submersible type wave energy-wind energy integrated power generation platform

Abstract

The invention discloses a semi-submersible wave energy-wind energy integrated power generation platform and a damping regulation and control method of a damping regulation and control system of the semi-submersible wave energy-wind energy integrated power generation platform. The platform comprises a semi-submersible wind driven generator platform, a wind driven generator set, a wave energy power generation device, an energy storage system, a sea area detection system and the damping regulation and control system. The wave energy power generation devices are divided into two groups on the inner side and the outer side of the platform, each wave energy power generation device comprises a platform inner side wave energy power generation device and a platform outer side wave energy power generation device, and each wave energy power generation device comprises a swing arm floater, a universal hinge, a connecting arm and a damping adjusting module. The semi-submersible wind power generation device and the wave power generation device are combined, and offshore renewable resources are comprehensively utilized; the six-buoy design is adopted, buoyancy is dispersed, stability and safety are improved, and meanwhile space is provided for a wave power generation device; the floaters are symmetrically arranged in a hexagonal shape and carry a damping regulation and control system, and the whole structure is more easily stabilized by adjusting the damping of the floaters in all directions.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ocean renewable energy, in particular to a semi-submersible wave energy and wind energy integrated power generation platform and a damping regulation method of a damping regulation system thereof. BACKGROUND

[0002] With the increasing demand for energy and the increasing dependence on clean energy, ocean energy, as a clean energy source with great potential, has attracted widespread attention. Among them, offshore wind energy and wave energy, with their significant advantages of large reserves, wide distribution and renewable, have become the focus of the field of ocean energy development.

[0003] Offshore wind energy and wave energy have large reserves and are closely related in distribution. The wave energy reserves in areas rich in wind energy are often also considerable. However, existing offshore wave energy generation devices and wind power generation devices are usually arranged separately, which can easily cause waste of resources.

[0004] The prior art lacks a cooperative utilization mechanism. The space for installing wave energy generation devices on traditional wind turbine platforms is limited, which can easily result in low power generation efficiency. At the same time, there is often a structural conflict between wave energy generation devices and offshore wind turbines, and the oscillating motion of wave energy generation devices can affect the stability of wind turbines. SUMMARY

[0005] The present application aims to provide a semi-submersible wave energy and wind energy integrated power generation platform that can change the damping of the floater holding device to keep it stable and maximize the capture of wave energy. Another object of the present application is to provide a damping regulation method for a damping regulation system of a semi-submersible wave energy and wind energy integrated power generation platform.

[0006] Technical solution: The semi-submersible wave energy and wind energy integrated power generation platform comprises a semi-submersible wind turbine platform, a wind turbine unit, a wave energy generation device, an energy storage system, a sea area detection system, and a damping regulation system. The semi-submersible wind turbine serves as the bearing platform for the wind turbine unit and the mounting base for the wave energy generation device. The wind turbine unit is mounted above the center column of the semi-submersible wind turbine platform.

[0007] Further, the wave energy generation device comprises an inboard wave energy generation device and an outboard wave energy generation device. Both groups of wave energy generation devices use a swing arm floater type wave energy generation device. The swing arm floater generation device is composed of a bowl-shaped floater, a universal joint, a damping adjustment module, and a connecting arm. The floater is connected to one end of the connecting arm through the universal joint and the damping adjustment module, and the other end of the connecting arm is connected to the center column transmission shaft or the upper transmission shaft between the floater and the pontoon.

[0008] Preferably, the damping adjustment module is a magnetorheological fluid damper.

[0009] Further, the energy storage system is installed at the bottom of the central tower, adopts super capacitor energy storage, stores part of the energy generated by the generator, and provides energy for the start of the wind turbine, the operation of the sea area detection system and the operation of the damping control system.

[0010] Further, the sea area detection system emits electromagnetic waves to the sea surface through a radar wave meter, receives echo signals reflected by the wave surface to measure the wave height, scans the radar beam on the sea surface, calculates the height and position of the wave according to the intensity and time delay of the echo signal, extracts the time sequence data of the wave height through data analysis, and transmits the extracted time sequence data of the wave height to the damping control system.

[0011] Further, the damping control system adopts an industrial computer, can receive and analyze the sea area information sent by the sea area detection system, calculate the most suitable damping of each floater, and send the damping adjustment module of each floater.

[0012] Further, the semi-submersible wind turbine platform comprises a central column and six main pontoons, the six main pontoons are symmetrically distributed in a hexagonal shape around the central column, and the central column and the main pontoons are connected through cross braces and inclined braces.

[0013] Further, the swing arm floater type wave power generation device is divided into two groups, each group has six, one group is installed at the bottom of the central column hexagonal, and the other group is installed on the transmission shaft at the upper connection between the pontoons, and the floater is coupled with the platform base through the connecting arm.

[0014] The damping control method of the damping control system of the semi-submersible wave energy-wind energy integrated power generation platform comprises the following steps:

[0015] The radar wave meter of the sea area detection system emits electromagnetic waves to the sea surface, receives echo signals reflected by the wave surface to measure the wave height, scans the radar beam on the sea surface, calculates the height and position of the wave according to the intensity and time delay of the echo signal, extracts the time sequence data of the wave height through data analysis, and transmits the extracted time sequence data of the wave height to the damping control system;

[0016] The industrial computer of the damping control system compares the wave height with the risk wave height, calculates the most suitable damping of each floater, and sends the damping adjustment module of each floater;

[0017] The damping adjustment module adjusts the damping coefficient c to make the natural period T of the floater close to the wave period T. 固有

[0018] ​Further, the damping adjustment module is a magneto-rheological fluid damper, if the wave height does not reach the risk wave height, the current is reduced under the low wave condition, the magnetic field is weakened, the viscosity of the magneto-rheological fluid is low, the swing arm is allowed to swing freely to maximize energy capture, under the high wave condition, the current is increased, the magnetic field is enhanced, the solidification degree of the magneto-rheological fluid is increased, and the damping is increased to protect the stability of the structure.

[0019] Advantages: compared with the prior art, the present application has the following advantages: 1, the present application can comprehensively utilize offshore wind energy and wave energy, through motion coordination design, improve the comprehensive energy utilization rate, share platform, energy storage system and anchoring system, reduce the investment cost, better adapt to deep sea sea conditions; 2, the present application adopts six floating cylinders with uniform distribution design, the buoyancy is dispersed, when a single floating cylinder or floater damping adjustment fails, the remaining floating cylinders can still provide stable support through adjustment, which significantly improves the restoring moment; compared with the traditional three floating cylinder structure, there is more space around the floating cylinder, and the swing arm floater type wave energy power generation device can be installed; 3, the swing arm floater part of the present application has a damping adjustment system, which can adjust the size of the floater damping according to the sea conditions, when the wave energy is sufficient, the floater damping is reduced to maximize the capture of wave energy, when the wave is too severe, the damping is increased to protect the structure. When a single floater fails, the damping distribution of the remaining floaters is automatically adjusted to maintain the overall stability. The damping adjustment module adopts a magneto-rheological fluid damper, which adjusts the damping by changing the current size, which is self-consistent with the offshore power generation device, and the magneto-rheological fluid technology avoids mechanical valve structure, improves reliability and response speed. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 Fig. 1 is a structural schematic diagram of the semi-submersible wave energy-wind energy integrated power generation platform of the present application;

[0021] Figure 2 Fig. 3 is a structural schematic diagram of the inside wave energy power generation device adopting the swing arm floater type wave energy power generation device;

[0022] Figure 3 Fig. 4 is a structural schematic diagram of the outside wave energy power generation device adopting the swing arm floater type wave energy power generation device;

[0023] Figure 4 Fig. 5 is a structural schematic diagram of the damping adjustment module;

[0024] Figure 5 Fig. 6 is a flow chart of the damping adjustment method of the present application. DETAILED DESCRIPTION

[0025] The present application will be further described below in conjunction with the drawings.

[0026] The semi-submersible wave energy-wind energy integrated power generation platform comprises a six-float semi-submersible wind turbine platform 1, a wind turbine set 2, a wave energy power generation device 3, an energy storage system 4, a sea area detection system 5 and a damping control system 6.

[0027] The six-float semi-submersible wind turbine platform is a hexagonal structure, and six main floats are symmetrically distributed in a hexagonal shape around a central column, and are connected between parts by cross braces and diagonal braces. The platform is mainly made of high-strength steel and concrete, and the structure is designed to facilitate modular prefabrication. The wind turbine set is a 5MW wind turbine set, which can maintain a rated power of 5MW by adjusting the blade angle.

[0028] As shown in Figure 2 and Figure 3 , the wave energy power generation device is divided into two groups of platform inside wave energy power generation device and platform outside wave energy power generation device, and the two groups of power generation devices are both swing arm floater type wave energy power generation devices, which comprise a swing arm floater 7, a universal hinge 8, a connecting arm 9 and a damping adjustment module 10. The swing arm floater is a bowl-shaped floater, which enhances the energy concentration effect and improves the multi-directional wave adaptability. The floater and the connecting arm are connected by a universal hinge, and a damping adjustment module is additionally provided. In operation, the floater is pushed by the wave to heave, roll or pitch, driving the linear generator connected by the universal hinge, and the connecting arm drives the power generation device of the connecting shaft to generate electricity together.

[0029] The energy storage system is installed at the bottom of the central tower and uses super capacitor energy storage. The super capacitor has a small volume and can provide high power required for starting the wind turbine, the operation power of the sea area detection system and the power required for damping adjustment of the wave energy generator. When the wind turbine set and the wave energy system are powered, the energy storage system is preferentially powered to maintain the operating power of the application.

[0030] The sea area detection system uses a distributed radar wave meter array installed on the upper end of each main float. A plurality of radar sensors emit high-frequency electromagnetic beams to the sea surface, and the antenna array receives the echo signals reflected by the wave surface and transmits them to the information processor to measure the wave height and frequency. The processor calculates the wave propagation distance according to the time delay of the echo signal, and inversely calculates the wave surface shape according to the echo intensity distribution. The calculator analyzes the echo time series data using fast Fourier transform, extracts the dominant frequency of the wave, calculates the effective wave height through the wave surface slope change rate, and records the wave propagation direction. Finally, the time series data of the extracted wave height is transmitted to the damping control system.

[0031] As shown in Figure 5As shown, the damping control system uses an industrial computer. The computer first compares the wave height with the risk wave height. If the wave height does not reach the risk wave height, the current is reduced under low wave conditions, the magnetic field is weakened, the viscosity of the magnetorheological fluid is low, and the swing arm is allowed to swing freely to maximize energy capture. Under high wave conditions, the current is increased, the magnetic field is enhanced, the solidification degree of the magnetorheological fluid is increased, and the damping is increased to protect the structural stability. The computer adjusts the damping coefficient c according to the formula

[0032]

[0033] Wherein: k is the material stiffness, which can be adjusted by changing the material and shape of the float.

[0034] m is the mass of the float.

[0035] C is the damping size, which is proportional to the current size.

[0036] The natural period of the float is calculated, and the difference between the detected sea wave period and the natural period of the float is calculated:

[0037] e = T-T 固有

[0038] A feedback control strategy is adopted, and the target is to control the target by adjusting the damping coefficient c, and the control target is to minimize |e|, so that the natural period T of the float 固有 is close to the sea wave period T. If T 固有 <T (the float vibrates too fast), the current is reduced to reduce the magnetic field strength, and the damping coefficient c is reduced. If T 固有 >T (the float vibrates too slowly), the current is increased to increase the magnetic field strength, and the damping coefficient c is increased.

[0039] The wave energy generation device is calculated to make the motion period close to the wave period to capture the sea wave energy. If the sea conditions are bad, the wave height exceeds the risk wave height, and the damping of the float is increased or even limited to protect the structure. During the use of the present application, when a certain float fails, the damping coefficient c is adjusted to c1 at this time.

[0040]

[0041] The system redistributes the target damping coefficient of the remaining floats to ensure overall torque balance.

[0042] The semi-submersible wave energy-wind energy integrated power generation platform combines the functions of offshore wind power generation devices and wave energy generation devices, improves the comprehensive energy utilization rate through motion coordination design, and simultaneously uses the floating platform, energy storage system and anchoring system of the two devices, thereby reducing the investment cost. The semi-submersible platform can better adapt to deep sea conditions compared to general platforms. The six floating cylinders are evenly distributed, the buoyancy is dispersed, and when a single floating cylinder or floater fails, the remaining floating cylinders can still provide stable support through adjustment, thereby significantly improving the restoring moment. Compared with the traditional three floating cylinder structure, there is more space around the floating cylinder, and the pendulum arm floater type wave energy generation device can be installed. The pendulum arm floater part is provided with a damping adjustment system, which can adjust the floater damping according to the sea conditions. When the wave energy is sufficient, the floater damping is reduced to maximize the capture of wave energy, and when the wave is too violent, the damping is increased to protect the structure. When a single floater fails, the damping distribution of the remaining floaters is automatically adjusted to maintain the overall stability.

[0043] The damping adjustment method of the damping adjustment system of the semi-submersible wave energy-wind energy integrated power generation platform comprises the following steps:

[0044] The radar wave meter of the sea area detection system transmits electromagnetic waves to the sea surface, receives the echo signals reflected by the wave surface to measure the wave height, scans the radar beam on the sea surface, calculates the height and position of the wave according to the intensity and time delay of the echo signal, extracts the time sequence data of the wave height through data analysis, and transmits the extracted time sequence data of the wave height to the damping adjustment system.

[0045] The industrial computer of the damping adjustment system compares the wave height with the risk wave height, calculates the most suitable damping of each floater, and sends it to the damping adjustment module of each floater.

[0046] The damping adjustment module adjusts the damping coefficient c to make the natural period T 固有 Close to the wave period T.

[0047] Further, the damping adjustment module is a magneto-rheological fluid damper. If the wave height does not reach the risk wave height, the current is reduced under low wave conditions, the magnetic field is weakened, the viscosity of the magneto-rheological fluid is low, the pendulum is allowed to swing freely to maximize energy capture, and under high wave conditions, the current is increased, the magnetic field is enhanced, the solidification degree of the magneto-rheological fluid is improved, and the damping is increased to protect the stability of the structure.

Claims

1. A semi-submersible wave energy-wind energy integrated power generation platform, characterized in that, It includes a semi-submersible wind turbine platform, a wind turbine generator set, a wave energy power generation device, an energy storage system, a marine monitoring system, and a damping control system; the semi-submersible wind turbine generator set serves as the carrier platform for the wind turbine generator set and the mounting base for the wave energy power generation device, with the wind turbine generator set mounted on top of the central column of the semi-submersible wind turbine generator platform.

2. The semi-submersible wave energy-wind energy integrated power generation platform according to claim 1, characterized in that, The wave energy generation device includes an inner wave energy generation device and an outer wave energy generation device on the platform; both sets of wave energy generation devices adopt the swing arm float type wave energy generation device; the swing arm float generation device consists of a bowl-shaped float, a universal joint, a damping adjustment module and a connecting arm. The float is connected to one end of the connecting arm through the universal joint and the damping adjustment module, and the other end of the connecting arm is connected to the central column drive shaft or the upper drive shaft between the floats.

3. The semi-submersible wave energy-wind energy integrated power generation platform according to claim 2, characterized in that, The damping adjustment module is a magnetorheological fluid damper.

4. The semi-submersible wave energy-wind energy integrated power generation platform according to claim 2, characterized in that, The energy storage system is installed at the bottom of the central tower and uses supercapacitors for energy storage. The energy storage system stores part of the energy generated by the generator and provides energy for the start-up of the wind turbine, the operation of the marine monitoring system, and the operation of the damping control system.

5. The semi-submersible wave energy-wind energy integrated power generation platform according to claim 4, characterized in that, The marine detection system is used to transmit electromagnetic waves to the sea surface through a radar wave meter, and to receive the echo signals reflected back from the wave surface to measure the wave height. The radar beam scans the sea surface, and calculates the wave height and position based on the intensity and time delay of the echo signal. After data analysis, the system extracts the time-series data of the wave height and transmits the extracted time-series data of the wave height to the damping control system.

6. The semi-submersible wave energy-wind energy integrated power generation platform according to claim 5, characterized in that, The damping control system uses an industrial computer that can receive and analyze sea area information sent by the sea area detection system, calculate the most suitable damping for each float, and send it to the damping adjustment module of each float.

7. The semi-submersible wave-wind power generation platform according to claim 1, characterized in that, The semi-submersible wind turbine platform includes a central column and six main buoys. The six main buoys are symmetrically distributed in a hexagon around the central column, and the central column and the main buoys are connected by horizontal and diagonal braces.

8. The semi-submersible wave-wind power generation platform according to claim 1, characterized in that, The swing-arm float-type wave energy generation device is divided into two groups, with six in each group. One group is installed at the bottom hexagon of the central column, and the other group is installed on the drive shaft at the upper connection between the floats. The floats are coupled to the platform base through the connecting arm.

9. A damping control method for the damping control system of the semi-submersible wave energy-wind energy integrated power generation platform according to any one of claims 1-8, characterized in that, Includes the following steps: The radar wave meter of the marine monitoring system emits electromagnetic waves into the sea surface and receives the echo signals reflected back from the wave surface to measure the wave height. The radar beam scans the sea surface and calculates the wave height and position based on the intensity and time delay of the echo signal. After data analysis, the time series data of the wave height is extracted and transmitted to the damping control system. The industrial computer of the damping control system compares the wave height with the risk wave height, calculates the most suitable damping for each float, and sends it to the damping adjustment module of each float. The damping adjustment module adjusts the damping coefficient c to change the float's natural period T. 固有 Approaching wave cycle T.

10. The damping control method of the damping control system of the semi-submersible wave energy-wind energy integrated power generation platform according to claim 9, characterized in that, The damping adjustment module is a magnetorheological fluid damper. If the wave height does not reach the risk wave height, the current is reduced under low wave conditions, the magnetic field is weakened, the viscosity of the magnetorheological fluid is low, and the swing arm is allowed to swing freely to maximize energy capture. Under high wave conditions, the current is increased, the magnetic field is strengthened, the solidification degree of the magnetorheological fluid is increased, and the damping is increased to protect the structural stability.

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