CN110578769B - Self-protection system and self-protection method of wave energy power generation device in extreme marine environment - Google Patents
Self-protection system and self-protection method of wave energy power generation device in extreme marine environment Download PDFInfo
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- CN110578769B CN110578769B CN201910830766.5A CN201910830766A CN110578769B CN 110578769 B CN110578769 B CN 110578769B CN 201910830766 A CN201910830766 A CN 201910830766A CN 110578769 B CN110578769 B CN 110578769B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
- F03B13/14—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
- F03B13/16—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem"
- F03B13/18—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/28—Counterweights, i.e. additional weights counterbalancing inertia forces induced by the reciprocating movement of masses in the system, e.g. of pistons attached to an engine crankshaft; Attaching or mounting same
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
- B63B2035/442—Spar-type semi-submersible structures, i.e. shaped as single slender, e.g. substantially cylindrical or trussed vertical bodies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
- B63B2035/4433—Floating structures carrying electric power plants
- B63B2035/4466—Floating structures carrying electric power plants for converting water energy into electric energy, e.g. from tidal flows, waves or currents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/90—Mounting on supporting structures or systems
- F05B2240/95—Mounting on supporting structures or systems offshore
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/96—Preventing, counteracting or reducing vibration or noise
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
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Abstract
The invention discloses a self-protection system and a self-protection method of a wave energy power generation device in an extreme marine environment, wherein the self-protection system comprises two cylindrical rigid body guide posts with bottoms deeply buried in the sea floor and tops exposed out of the sea surface, a working platform lifting device is arranged at the top end of each guide post, a working platform is arranged at the top end of each working platform lifting device, a controller, a singlechip, an electromagnetic relay and a storage battery are arranged in the working platform, a vibration absorption block lifting device is arranged at the top of the working platform, and a vibration absorption block is arranged at the top of the vibration absorption block lifting device. The self-protection system and the self-protection method disclosed by the invention utilize the principle of a dynamic vibration absorber to transfer the intense vibration of the floater and the working platform in extreme sea conditions to the vibration absorbing block fixedly connected with the working platform, so that the acting force of the vibration absorbing block on the working platform and the floater just balances the wave force directly born by the working platform and the floater, namely the vibration absorbing block is utilized to absorb the vibration energy of the floater and the working platform, thereby achieving the purpose of reducing the intense vibration of the floater and the working platform.
Description
Technical Field
The invention belongs to the field of wave energy power generation devices, and particularly relates to a self-protection system and a self-protection method of a wave energy power generation device in an extreme marine environment.
Background
When extremely severe sea conditions are met, the floats and the working platform of the offshore oscillating-float wave energy generating device are impacted by huge wind waves, so that the float structure is possibly damaged, and the working platform is possibly instable and overturned due to overlarge amplitude, so that the service life and the working performance of the wave energy generating device are seriously affected. Therefore, it is necessary to make the wave energy power generation device timely judge the vibration condition of the wave energy power generation device when facing to extremely severe sea conditions and automatically and effectively make self-protection measures, but most of the existing wave energy power generation devices have no self-protection function, and when extremely severe sea conditions occur, some electric devices on the working platform of the wave energy power generation device and the floats are often destroyed because timely protection is not available.
Disclosure of Invention
The invention aims to solve the technical problem of providing a self-protection system and a self-protection method of a wave energy power generation device in an extreme marine environment.
The invention adopts the following technical scheme:
in a self-sustaining system for a wave energy power plant in an extreme marine environment, the improvement comprising: the self-protection system comprises two cylindrical rigid body guide posts, wherein the bottoms of the cylindrical rigid body guide posts are deeply buried in the sea floor, the tops of the guide posts are exposed out of the sea surface, a working platform lifting device is arranged at the top of the guide posts, a working platform is arranged at the top of the working platform lifting device, a controller, a singlechip, an electromagnetic relay and a storage battery are arranged in the working platform, a vibration absorbing block lifting device is arranged at the top of the working platform, a vibration absorbing block is arranged at the top of the vibration absorbing block lifting device, in addition, a cylindrical floater penetrates through the two guide posts, floats on the sea surface and can slide up and down along the two guide posts, an iron block is arranged at the top of the cylindrical floater and is opposite to the electromagnetic relay, a power generation system and a vibration sensor are arranged in the cylindrical floater, the singlechip is respectively electrically connected with the vibration sensor, the vibration sensor is used for controlling the lifting of the working platform lifting device and the vibration absorbing block lifting device through the controller, the power output end of the power generation system is electrically connected with the storage battery, and the storage battery is used for supplying power for all components in the self-protection system.
Further, the working platform is fixedly arranged at the top end of the lifting device of the working platform in a welding mode.
Further, the bottom of the working platform lifting device is embedded and fixed at the top of the guide post; the vibration absorption block lifting device is embedded and welded inside the working platform.
Further, the shock absorbing block is a mass block with large density and small volume.
Further, a circular groove is formed in the position, opposite to the electromagnetic relay, of the bottom of the working platform, and the iron block is a circular iron block.
Further, the working platform lifting device and the vibration absorbing block lifting device are telescopic tension compression rods.
The self-protecting method of the wave energy power generation device in the extreme marine environment, which uses the self-protecting system, is characterized by comprising the following steps:
(1) The vibration sensor senses the vibration displacement amplitude of the cylindrical floater in real time and transmits the vibration displacement amplitude to the singlechip, and the singlechip carries out real-time, comprehensive and multifunctional intelligent processing on the sensed data;
(21) Under normal sea conditions, the vibration displacement amplitude is within a preset safety range, and the cylindrical floater performs up-down heave motion along with waves to drive a power generation system in the cylindrical floater to generate power, and the power generated by the power generation system can be output to a storage battery for storage;
(22) Under extreme sea conditions, the vibration displacement amplitude exceeds a preset safe transition range, the singlechip controls the vibration absorption block lifting device to drive the vibration absorption block to lift up, the lifting height is adjusted in real time by the singlechip according to the vibration displacement amplitude, the singlechip also switches on the electromagnetic relay and controls the working platform lifting device to descend through the controller until the cylindrical floater can be attracted to the bottom of the working platform through the magnetic force of the electromagnetic relay, at the moment, the cylindrical floater and the working platform form a whole, and the vibration absorption block adjusts the integral displacement amplitude within the safe transition range;
(221) When the sea surface returns to normal sea conditions, the vibration displacement amplitude falls to a preset safety range again, the singlechip controls the vibration absorption block lifting device to drive the vibration absorption block to descend to an initial position through the controller, the singlechip also cuts off the electromagnetic relay and controls the working platform lifting device to ascend to the initial position through the controller, magnetic force disappears after the electromagnetic relay is cut off, the cylindrical floater falls back to the sea surface again, and the power generation by wave heave continues.
Further, in the step (1), the vibration sensor senses the vibration displacement amplitude of the cylindrical floater in real time, and the singlechip performs the vibration displacement according to a general motion equation x=x m sin2 pi ft to determine vibration displacement X, X m Representing the vibration displacement amplitude, f representing the vibration frequency.
Further, the vibration displacement amplitude safety range of the cylindrical floater can be set to be 0-0.3m, the safety transition range can be set to be 0.3-0.5m, and the parameter ranges of different wave energy power generation devices can be set according to specific environments under actual sea conditions.
The beneficial effects of the invention are as follows:
the self-protection system and the self-protection method disclosed by the invention utilize the principle of a dynamic vibration absorber to transfer the intense vibration of the floater and the working platform to the vibration absorbing block fixedly connected with the working platform in extreme sea conditions, so that the acting force of the vibration absorbing block on the working platform and the floater just balances the wave force directly born by the working platform and the floater, namely the vibration absorbing block absorbs the vibration energy of the floater and the working platform, thereby achieving the purpose of reducing the intense vibration of the floater and the working platform, avoiding the working platform from overturning under severe sea conditions, and simultaneously utilizing magnetic force to absorb the cylindrical floater to the bottom of the working platform, reducing the intense vibration of the cylindrical floater and protecting the self structure from being damaged. Thereby timely and effectively protecting the wave energy power generation device under extreme sea conditions.
The self-protection system and the self-protection method disclosed by the invention aim at the situation that the wave energy power generation device is subjected to extremely large impact of wind waves and causes severe vibration under extreme sea conditions, the principle of the dynamic vibration absorber is fully utilized, the vibration absorbing block is driven to rise by the lifting device to serve as an upper structure, the working platform and the cylindrical floater are integrated to serve as a lower structure, and the vibration of the lower structure can be eliminated when the upper structure connected with the working platform vibrates, so that the impact suffered by the working platform is reduced, the vibration of the whole wave energy power generation device is reduced, and meanwhile, the floater structure can be prevented from being damaged. The wave energy power generation device can be effectively protected in real time, vibration of the working platform in extreme sea conditions is reduced to the maximum extent, and the safety of the floater is effectively guaranteed; the automatic monitoring of vibration parameters and the automatic adjustment of the rising height of the vibration absorbing block can be realized, the protection efficiency is high, and the device can be suitable for different extreme sea conditions.
The self-protection system disclosed by the invention has the advantages of simple structure, convenience in manufacturing, small occupied space and low cost, and can effectively avoid the working platform from overturning under extreme sea conditions.
Drawings
FIG. 1 is a schematic illustration of the dynamic vibration absorber principle utilized by the present invention;
FIG. 2 is a schematic diagram of the self-protecting system disclosed in embodiment 1 of the present invention under normal sea conditions;
FIG. 3 is a schematic diagram of the self-protecting system disclosed in embodiment 1 of the present invention under extreme sea conditions;
FIG. 4 is a graph of a numerical model without taking self-preservation measures;
fig. 5 is a numerical model diagram in which self-protection measures are taken.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, taking the forced vibration of the double-degree-of-freedom steel frame system under the simple harmonic load as an example, the displacement amplitudes of the upper layer structure and the lower layer structure are respectively as follows:
D 0 ＝(k 11 -θ 2 m 1 )(k 22 -θ 2 m 2 )-k 12 k 21 (3)
F p(t) ＝F p sinθt (4)
wherein k is 11 ＝k 1 +k 2 ，k 12 ＝k 21 ＝-k 2 ，k 22 ＝k 2 ，k 1 And k 2 The rigidity coefficients of the lower rod and the upper rod are respectively; y is Y 2 And Y 1 The displacement amplitude is the displacement amplitude of the upper and lower layer structures of the system; m is m 1 Is the main system quality, m 2 Is an additional system quality; f (F) p1 And F p2 Simple harmonic loading respectively acting on the lower layer structure and the upper layer structure, wherein theta is loading frequency, and the loading amplitude F p1 ＝F p ，F p2 ＝0。
When no upper layer structure absorbs vibration, the displacement of the lower layer structure is as follows:
where ω is the natural frequency of the structure,when meeting k 2 ＝θ 2 m 2 Under this condition
Y 1 ＝0 (6)
I.e. the displacement amplitude of the underlying structure is 0. The mass m of the vibration absorbing block in the self-protection system 2 The method comprises the following steps:
and due toThe wind load after the rise caused by the large density and the small volume is also smaller, namely the load amplitude F p2 Close to 0; f (F) p1 The wave load of the floater is that the volume of the floater is large, so that the wave force of the floater is huge under the extreme sea condition, and the floater can vibrate severely; thus when the whole system is easier to satisfy k 2 ＝θ 2 m 2 Under the condition, the displacement amplitude of the lower structure can be effectively reduced, namely the severe vibration of the floater and the working platform is reduced to the greatest extent.
In the embodiment 1, as shown in fig. 1, the embodiment discloses a self-protection system of a wave energy power generation device in an extreme ocean environment, the self-protection system comprises two cylindrical rigid body guide posts 8 with bottoms deeply buried on the ocean floor and tops exposed on the ocean surface, a working platform lifting device 4 is arranged at the top ends of the guide posts, a working platform 2 is arranged at the top ends of the working platform lifting device, a controller 3, a singlechip, an electromagnetic relay 10 and a storage battery 11 are arranged in the working platform, a vibration absorption block lifting device 9 is arranged at the top ends of the working platform, a vibration absorption block 1 is arranged at the top ends of the vibration absorption block lifting device, a cylindrical floater 6 is penetrated on the two guide posts and can slide up and down along the two guide posts, an iron block 5 is arranged at the top ends of the cylindrical floater and is opposite to the position of the electromagnetic relay, a power generation system 7 and a vibration sensor 12 are arranged in the cylindrical floater, the singlechip is respectively and electrically connected with the vibration sensor, the controller and the electromagnetic relay, the singlechip is electrically connected with the vibration absorption block lifting device and the storage battery through the controller according to vibration parameters obtained from the vibration sensor, and the vibration sensor is connected with the power generation system through the power supply end of the self-protection system.
In this embodiment, the working platform is fixedly mounted on the top end of the lifting device of the working platform in a welding manner. The bottom of the working platform lifting device is embedded and fixed at the top of the guide column; the vibration absorption block lifting device is embedded and welded inside the working platform. The vibration absorbing block is a mass block with large density and small volume. The bottom of the working platform is provided with the circular groove at the position opposite to the electromagnetic relay, the iron block is a circular iron block, and after the circular iron block is magnetically attracted to the circular groove, the contact area between the cylindrical floater and the working platform can be increased, so that the cylindrical floater and the working platform are better integrated. The working platform lifting device and the vibration absorbing block lifting device are telescopic tension rods made of high-strength materials.
The working principle of the self-protection system is that the vibration of the lower layer structure can be eliminated through the vibration of the connected upper layer structure by relying on the principle of a dynamic vibration absorber, namely when the double-freedom-degree system forcedly vibrates under the action of load. Therefore, when the extreme sea condition occurs, the vibration absorbing block rises upwards through the vibration absorbing block lifting device to serve as a superstructure, and a double-degree-of-freedom system is formed by the whole body of the cylindrical floater and the working platform, when the k is satisfied 2 ＝θ 2 m 2 When Y is 1 =0, at which time the amplitude of the vibration displacement of the cylindrical float and the working platform is 0. The wind load that work platform received is less, can neglect, and cylindrical float is because the volume is great, and the wave force that receives is huge when extreme sea state, consequently carries out numerical simulation to the state of device under the extreme sea state in order to explain the service condition of the self preservation system that this embodiment disclosed.
The device conditions are as follows: the length of the guide column is 10m, and the diameter D 1 =0.15m, modulus of elasticity E 1 ＝2.06×10 11 Pa(N/m 2 ) The method comprises the steps of carrying out a first treatment on the surface of the Cylindrical float parameters: diameter d=3.6 m, height h=2.4 m, and total 5t with the work platform mass; elastic modulus E of vibration absorbing block lifting device 2 ＝2.678×10 11 Pa(N/m 2 ) The diameter is 0.04m; wave parameters for setting extreme sea conditions: wave height h=3m, period t=8s, wavelength 71m, wave number 0.088, water depth d=10m. The horizontal wave force of the cylindrical float can be found by Morrison's equation
The coefficients are known: c (C) D ＝1.2，C M =2, substituting the data, F is obtained from equation (9) p1 ＝f H = 78.412kN; the allowable displacement of the shock absorbing block is set as Y 2 =1m, from equation (7), it can be seen that k 2 = 78.412kN/m, load frequencyRate ofThus, from equation (8), m 2 127.12kg, a shock-absorbing mass 2m long, 0.2m wide and 0.05m high, having a density of 6356kg/m 3 Is made of high-density material, has smaller volume, and is subjected to much smaller wind load than the wave force of the floater when lifted under extreme sea conditions, namely the load amplitude F p2 Near 0; from equation (5), it can be seen that the displacement Y of the underlying structure is not taken under extreme sea conditions 1 =0.64 m; at the same time according to k 2 The extending and elevating distance of the vibration absorbing block is calculated to be 2.17m, so that the design requirement is met. Therefore, the shock of 7.8 tons of force can be eliminated by using a 127.12kg shock absorbing block, and the stability of the cylindrical float and its internal structure can be greatly protected.
The feasibility of the method is demonstrated by performing numerical tests. Establishing a numerical model according to the parameters, wherein the numerical model is shown in figure 4, and the maximum displacement of the working platform under the action of waves is about 0.64m when no self-protection measures are taken under extreme sea conditions; the numerical model after self-protection measures are adopted is shown in fig. 5, the amplitude of the vibration absorbing block is 1m, the rising distance is 2.17m, the design requirement is met, the maximum displacement of the cylindrical floater and the working platform under the wave action is about 0.08m, equipment such as a motor on the oscillating floater and the working platform is well protected, and damage to the equipment such as the motor caused by severe shaking of the working platform under extreme sea conditions is avoided.
The embodiment also discloses a self-protection method of the wave energy power generation device in an extreme marine environment, which comprises the following steps of:
(1) The vibration sensor senses the vibration displacement amplitude of the cylindrical floater in real time and transmits the vibration displacement amplitude to the singlechip, and the singlechip carries out real-time, comprehensive and multifunctional intelligent processing on the sensed data;
(21) Under normal sea conditions, as shown in fig. 1, the vibration displacement amplitude is within a preset safety range, and the cylindrical floater moves vertically along with waves to drive a power generation system in the cylindrical floater to generate power, and the power generated by the power generation system can be output to a storage battery for storage;
(22) Under extreme sea conditions, as shown in fig. 2, the vibration displacement amplitude exceeds a preset safe transition range, the singlechip controls the vibration absorption block lifting device to drive the vibration absorption block to lift through the controller, the lifting height is adjusted in real time by the singlechip according to the vibration displacement amplitude, the singlechip also switches on the electromagnetic relay and controls the working platform lifting device to descend through the controller until the cylindrical floater can be attracted to the bottom of the working platform through the magnetic attraction iron block of the electromagnetic relay, at the moment, the cylindrical floater and the working platform form a whole, and the whole displacement amplitude is adjusted in the safe transition range through the vibration absorption block;
(221) When the sea surface returns to normal sea conditions, the vibration displacement amplitude falls to a preset safety range again, the singlechip controls the vibration absorption block lifting device to drive the vibration absorption block to descend to an initial position through the controller, the singlechip also cuts off the electromagnetic relay and controls the working platform lifting device to ascend to the initial position through the controller, magnetic force disappears after the electromagnetic relay is cut off, the cylindrical floater falls back to the sea surface again, and the power generation by wave heave continues.
Two rigid body guide posts are buried in the sea bottom, the top ends of the two rigid body guide posts are welded with the working platform through the lifting device, and the descending working platform and the floats form a lower layer structure together in extreme sea conditions. Under normal conditions, the vibration displacement amplitude of the cylindrical floater has a certain safety range, and the general motion equation is x=x m sin2 pi ft, so that different wave energy power generation devices need to set a safe displacement amplitude range according to actual sea conditions. For example, when the vibration displacement parameter is set to: 0-0.3m; the vibration displacement parameter range of the safe transition is set as follows: 0.3-0.5m; the inside of the cylindrical float is threatened to be destroyed when the safe transition range is broken, and is therefore not allowed to occur. When the sea state is normal, the vibration parameters of the working platform are changed in a normal range, and the wave energy power generation device generates power normally; when the extreme sea condition occurs, the vibration intensity of the working platform can reach or exceed the parameter limit under the normal sea condition, the vibration sensor and the single chip can analyze the displacement amplitude in real time, and the control can be started once the analysis result exceeds the parameter range of the safe transition (the vibration displacement exceeds 0.5 m)The controller controls the expansion and contraction of the lifting device; when the vibration sensor detects that the parameter value falls to the normal sea condition range (the vibration displacement is lower than 0.3 m), the lifting device is restored to the original state. The bottom of the vibration absorption block lifting device is embedded and welded inside the working platform, the vibration absorption block is fixed at the top of the lifting device, and the controller is fixedly arranged at one side of the working platform; the lifting device of the working platform is fixedly embedded in the guide post, is of a telescopic structure and is controlled to stretch and retract by a controller. All the power transmission lines are made of special materials, seawater corrosion is avoided, and the storage battery realizes power supply for all the output devices. When the extreme sea condition occurs, the ascending vibration absorbing block has smaller stress amplitude under the action of wind load due to smaller volume, so the vibration absorbing block can serve as an upper structure of a double-degree-of-freedom system, and vibration energy of a lower structure is effectively absorbed, so that stability of the floater and the working platform under the extreme sea condition is protected.
Claims (9)
1. A self-sustaining system for a wave energy power plant in an extreme marine environment, characterized by: the self-protection system comprises two cylindrical rigid body guide posts, wherein the bottoms of the cylindrical rigid body guide posts are deeply buried in the sea floor, the tops of the guide posts are exposed out of the sea surface, a working platform lifting device is arranged at the top of the guide posts, a working platform is arranged at the top of the working platform lifting device, a controller, a singlechip, an electromagnetic relay and a storage battery are arranged in the working platform, a vibration absorbing block lifting device is arranged at the top of the working platform, a vibration absorbing block is arranged at the top of the vibration absorbing block lifting device, in addition, a cylindrical floater penetrates through the two guide posts, floats on the sea surface and can slide up and down along the two guide posts, an iron block is arranged at the top of the cylindrical floater and is opposite to the electromagnetic relay, a power generation system and a vibration sensor are arranged in the cylindrical floater, the singlechip is respectively electrically connected with the vibration sensor, the vibration sensor is used for controlling the lifting of the working platform lifting device and the vibration absorbing block lifting device through the controller, the power output end of the power generation system is electrically connected with the storage battery, and the storage battery is used for supplying power for all components in the self-protection system.
2. Self-sustaining system for a wave energy power plant in an extreme marine environment, according to claim 1, wherein: the working platform is fixedly arranged at the top end of the lifting device of the working platform in a welding mode.
3. Self-sustaining system for a wave energy power plant in an extreme marine environment, according to claim 1, wherein: the bottom of the working platform lifting device is embedded and fixed at the top of the guide column; the vibration absorption block lifting device is embedded and welded inside the working platform.
4. Self-sustaining system for a wave energy power plant in an extreme marine environment, according to claim 1, wherein: the vibration absorbing block is a mass block with large density and small volume.
5. Self-sustaining system for a wave energy power plant in an extreme marine environment, according to claim 1, wherein: and a circular groove is arranged at the bottom of the working platform and opposite to the electromagnetic relay, and the iron block is a circular iron block.
6. Self-sustaining system for a wave energy power plant in an extreme marine environment, according to claim 1, wherein: the working platform lifting device and the vibration absorbing block lifting device are telescopic tension compression rods.
7. A self-protecting method of a wave energy power generation device in an extreme marine environment, using the self-protecting system of claim 1, comprising the steps of:
(1) The vibration sensor senses the vibration displacement amplitude of the cylindrical floater in real time and transmits the vibration displacement amplitude to the singlechip, and the singlechip processes the sensed data in real time;
(21) Under normal sea conditions, the vibration displacement amplitude is within a preset safety range, and the cylindrical floater performs up-down heave motion along with waves to drive a power generation system in the cylindrical floater to generate power, and the power generated by the power generation system can be output to a storage battery for storage;
(22) Under extreme sea conditions, the vibration displacement amplitude exceeds a preset safe transition range, the singlechip controls the vibration absorption block lifting device to drive the vibration absorption block to lift up, the lifting height is adjusted in real time by the singlechip according to the vibration displacement amplitude, the singlechip also switches on the electromagnetic relay and controls the working platform lifting device to descend through the controller until the cylindrical floater can be attracted to the bottom of the working platform through the magnetic force of the electromagnetic relay, at the moment, the cylindrical floater and the working platform form a whole, and the vibration absorption block adjusts the integral displacement amplitude within the safe transition range;
(221) When the sea surface returns to normal sea conditions, the vibration displacement amplitude falls to a preset safety range again, the singlechip controls the vibration absorption block lifting device to drive the vibration absorption block to descend to an initial position through the controller, the singlechip also cuts off the electromagnetic relay and controls the working platform lifting device to ascend to the initial position through the controller, magnetic force disappears after the electromagnetic relay is cut off, the cylindrical floater falls back to the sea surface again, and the power generation by wave heave continues.
8. The method of self-protecting a wave energy power-plant in an extreme marine environment according to claim 7, wherein: in the step (1), a vibration sensor senses vibration displacement amplitude of a cylindrical floater in real time, and a singlechip is used for detecting the vibration displacement amplitude according to a general motion equation X=X of vibration displacement m sin2 pi ft to determine vibration displacement X, X m Representing the vibration displacement amplitude, f representing the vibration frequency.
9. The method of self-protecting a wave energy power-plant in an extreme marine environment according to claim 8, wherein: the safe range of the vibration displacement amplitude of the cylindrical floater can be set to be 0-0.3m, and the safe transition range can be set to be 0.3-0.5m.
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Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0316869D0 (en) * | 2003-07-18 | 2003-08-20 | Kelly H P G | Method of operation for a self-protecting wave energy conversion plant |
| GB0721623D0 (en) * | 2007-11-02 | 2007-12-12 | Univ Manchester | Wave energy apparatus |
| CN102032312A (en) * | 2010-12-10 | 2011-04-27 | 重庆大学 | Magnetorheological fat-based self-powered damping adjustment device |
| KR20110054931A (en) * | 2009-11-19 | 2011-05-25 | 박지원 | Production of electric energy from sea waves |
| WO2012088271A2 (en) * | 2010-12-21 | 2012-06-28 | Oscilla Power Inc. | Vibration energy harvesting apparatus |
| CN205152928U (en) * | 2015-11-06 | 2016-04-13 | 浙江海洋学院 | Lifting device for wave energy float electricity generation platform |
| CN107816411A (en) * | 2017-10-27 | 2018-03-20 | 中国海洋大学 | A kind of oscillating floater electricity generation system and its float guard method with float protection mechanism |
| CN107917039A (en) * | 2017-12-19 | 2018-04-17 | 哈尔滨工程大学 | A kind of totally-enclosed inertia point sucking type wave energy apparatus |
| CN108061001A (en) * | 2018-01-19 | 2018-05-22 | 中国海洋大学 | The limitation locking protective device of float and guard method under a kind of extreme sea condition |
| CN207728479U (en) * | 2018-01-19 | 2018-08-14 | 中国海洋大学 | The limitation locking protective device of float under a kind of extreme sea condition |
| CN109915519A (en) * | 2019-03-12 | 2019-06-21 | 上海交通大学 | Electromagnetism inhales vibrating isolation system |
| CN110107632A (en) * | 2019-06-03 | 2019-08-09 | 江南大学 | A kind of positive and negative Stiffness low frequency vibration isolation device coupling dynamic vibration absorber |
| CN110832236A (en) * | 2017-06-30 | 2020-02-21 | 株式会社富士金 | Valve device |
| CN210799860U (en) * | 2019-09-04 | 2020-06-19 | 中国海洋大学 | Self-protection system of wave energy power generation device in extreme marine environment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9726143B2 (en) * | 2014-04-07 | 2017-08-08 | University Of Manitoba | Ocean wave energy harvesting with a piezoelectric coupled buoy |
-
2019
- 2019-09-04 CN CN201910830766.5A patent/CN110578769B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0316869D0 (en) * | 2003-07-18 | 2003-08-20 | Kelly H P G | Method of operation for a self-protecting wave energy conversion plant |
| GB0721623D0 (en) * | 2007-11-02 | 2007-12-12 | Univ Manchester | Wave energy apparatus |
| KR20110054931A (en) * | 2009-11-19 | 2011-05-25 | 박지원 | Production of electric energy from sea waves |
| CN102032312A (en) * | 2010-12-10 | 2011-04-27 | 重庆大学 | Magnetorheological fat-based self-powered damping adjustment device |
| WO2012088271A2 (en) * | 2010-12-21 | 2012-06-28 | Oscilla Power Inc. | Vibration energy harvesting apparatus |
| CN205152928U (en) * | 2015-11-06 | 2016-04-13 | 浙江海洋学院 | Lifting device for wave energy float electricity generation platform |
| CN110832236A (en) * | 2017-06-30 | 2020-02-21 | 株式会社富士金 | Valve device |
| CN107816411A (en) * | 2017-10-27 | 2018-03-20 | 中国海洋大学 | A kind of oscillating floater electricity generation system and its float guard method with float protection mechanism |
| CN107917039A (en) * | 2017-12-19 | 2018-04-17 | 哈尔滨工程大学 | A kind of totally-enclosed inertia point sucking type wave energy apparatus |
| CN108061001A (en) * | 2018-01-19 | 2018-05-22 | 中国海洋大学 | The limitation locking protective device of float and guard method under a kind of extreme sea condition |
| CN207728479U (en) * | 2018-01-19 | 2018-08-14 | 中国海洋大学 | The limitation locking protective device of float under a kind of extreme sea condition |
| CN109915519A (en) * | 2019-03-12 | 2019-06-21 | 上海交通大学 | Electromagnetism inhales vibrating isolation system |
| CN110107632A (en) * | 2019-06-03 | 2019-08-09 | 江南大学 | A kind of positive and negative Stiffness low frequency vibration isolation device coupling dynamic vibration absorber |
| CN210799860U (en) * | 2019-09-04 | 2020-06-19 | 中国海洋大学 | Self-protection system of wave energy power generation device in extreme marine environment |
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|---|---|
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