阅读说明：本技术 一种在极端海洋环境中波能发电装置的自保系统及自保方法 (Self-protection system and self-protection method of wave energy power generation device in extreme marine environment ) 是由 于通顺 唐渔滢 史宏达 唐俊辉 徐昱 赵子帅 于 2019-09-04 设计创作，主要内容包括：本发明公开了一种在极端海洋环境中波能发电装置的自保系统及自保方法,所述的自保系统包括两根底部深埋于海底、顶部露出海面的圆柱刚体导向柱,在导向柱的顶端安装工作平台升降装置,在工作平台升降装置的顶端安装工作平台,在工作平台的内部安装控制器、单片机、电磁继电器和蓄电池,在工作平台的顶部安装吸振块升降装置,在吸振块升降装置的顶部安装吸振块。本发明所公开的自保系统及自保方法,利用动力吸振器原理,将极端海况时浮子和工作平台的剧烈振动过渡到与工作平台固定连接的吸振块上,致使吸振块对工作平台和浮子的作用力正好平衡了工作平台与浮子所直接受到的波浪力,也就是利用吸振块吸收浮子和工作平台的振动能量,来达到降低浮子和工作平台剧烈振动的目的。(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 guide columns, the bottoms of the two cylindrical rigid guide columns are deeply buried in the sea bottom, the tops of the two cylindrical rigid guide columns are exposed out of the sea surface, a working platform lifting device is installed at the top ends of the guide columns, a working platform is installed at the top ends of the working platform lifting device, a controller, a single chip microcomputer, an electromagnetic relay and a storage battery are installed in the working platform, a vibration absorption block lifting device is installed at the top of the working platform, and a vibration absorption block is installed at the top of the vibration absorption. The self-protecting system and the self-protecting method disclosed by the invention utilize the principle of a dynamic vibration absorber to transfer the violent vibration of the floater and the working platform under extreme sea conditions to the vibration absorber fixedly connected with the working platform, so that the acting force of the vibration absorber on the working platform and the floater just balances the wave force directly borne by the working platform and the floater, namely the vibration energy of the floater and the working platform is absorbed by the vibration absorber, and the aim of reducing the violent vibration of the floater and the working platform is fulfilled.)

1. a self-containment system for a wave energy power plant in an extreme marine environment, characterized by: the self-protection system comprises two cylindrical rigid guide columns, wherein the bottoms of the two cylindrical rigid guide columns are deeply embedded in the sea bottom, the tops of the two cylindrical rigid guide columns are exposed out of the sea surface, a working platform lifting device is installed at the top ends of the guide columns, a working platform is installed at the top end of the working platform lifting device, a controller, a single chip microcomputer, an electromagnetic relay and a storage battery are installed inside the working platform, a vibration absorption block lifting device is installed at the top of the working platform, a vibration absorption block is installed at the top of the vibration absorption block lifting device, a cylindrical floater penetrates through the two guide columns, floats on the sea surface and can slide up and down along the two guide columns, an iron block is installed at the position, right facing the electromagnetic relay, of the top of the cylindrical floater, a power generation system and a vibration sensor are installed in the cylindrical floater, the single chip microcomputer is respectively electrically connected with the vibration sensor, the controller and the electromagnetic relay, and the single chip microcomputer controls The power output end of the power generation system is electrically connected with the storage battery, and the storage battery supplies power to all parts in the self-protection system.

2. A self-containment system for a wave power plant in an extreme marine environment as defined in claim 1, wherein: the working platform is fixedly arranged at the top end of the working platform lifting device in a welding mode.

3. A self-containment system for a wave power plant in an extreme marine environment as defined in claim 1, wherein: 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, welded and installed inside the working platform.

4. A self-containment system for a wave power plant in an extreme marine environment as defined in claim 1, wherein: the vibration absorption block is a mass block with large density and small volume.

5. A self-containment system for a wave power plant in an extreme marine environment as defined in claim 1, wherein: a circular groove is arranged at the position, right opposite to the electromagnetic relay, of the bottom of the working platform, and the iron block is a circular iron block.

6. A self-containment system for a wave power plant in an extreme marine environment as defined in claim 1, wherein: the working platform lifting device and the vibration absorption block lifting device are telescopic tension and compression rods.

7. A method of self-sustaining wave energy power plants in extreme marine environments, using the self-sustaining 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 single chip microcomputer, and the single chip microcomputer processes sensed data in real time;

(21) under normal sea conditions, the vibration displacement amplitude is within a preset safety range, the cylindrical floater does vertical oscillation motion along with waves to drive a power generation system inside 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 safety transition range, the single chip microcomputer controls the vibration absorption block lifting device to drive the vibration absorption block to ascend through the controller, the ascending height is adjusted in real time through the single chip microcomputer according to the vibration displacement amplitude, the single chip microcomputer is also connected with the electromagnetic relay and controls the working platform lifting device to descend through the controller until the magnetic force of the electromagnetic relay attracts the iron block to attract the cylindrical floater to the bottom of the working platform, at the moment, the cylindrical floater and the working platform form a whole, and the vibration absorption block adjusts the displacement amplitude of the whole within the safety transition range;

(221) When the sea surface returns to the normal sea condition, and the vibration displacement amplitude is reduced to the preset safety range again, the single chip microcomputer controls the vibration absorption block lifting device through the controller to drive the vibration absorption block to fall to the initial position, the single chip microcomputer also disconnects the electromagnetic relay and controls the working platform lifting device to rise to the initial position through the controller, after the electromagnetic relay is disconnected, the magnetic force disappears, the cylindrical floater falls back to the sea surface again, and the cylindrical floater continues to swing along with the waves to generate electricity.

8. A method of self-containment of a wave power plant in an extreme marine environment according to claim 7, characterized in that: in the step (1), the vibration sensor senses the vibration displacement amplitude of the cylindrical floater in real time, and the singlechip controls the singlechip to work according to the general motion equation X of the vibration displacement_msin2 π ft to determine the vibration displacement X, X_mrepresenting the vibration displacement amplitude, f representing the vibration frequency.

9. A method of self-containment of a wave power plant in an extreme marine environment according to claim 8, characterized in that: 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 0.3-0.5 m.

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 in the field.

background

When the offshore type oscillating floater wave energy power generation device encounters extreme severe sea conditions, the floater and the working platform of the offshore type oscillating floater wave energy power generation device are subjected to huge storm impact, the floater structure is possibly damaged, the working platform is possibly unstably and overturned due to overlarge amplitude, and the service life and the working performance of the wave energy power generation device are seriously influenced. Therefore, it is necessary to make the wave energy power generation device capable of judging its own vibration condition in time when facing extreme severe sea conditions and automatically and effectively making self-protection measures, but most of the existing wave energy power generation devices do not have self-protection function, and when the extreme severe sea conditions occur, some electric devices and floats on the working platform of the wave energy power generation device are often destroyed because they cannot be protected in time.

Disclosure of Invention

The invention aims to provide 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 guide columns, wherein the bottoms of the two cylindrical rigid guide columns are deeply embedded in the sea bottom, the tops of the two cylindrical rigid guide columns are exposed out of the sea surface, a working platform lifting device is installed at the top ends of the guide columns, a working platform is installed at the top end of the working platform lifting device, a controller, a single chip microcomputer, an electromagnetic relay and a storage battery are installed inside the working platform, a vibration absorption block lifting device is installed at the top of the working platform, a vibration absorption block is installed at the top of the vibration absorption block lifting device, a cylindrical floater penetrates through the two guide columns, floats on the sea surface and can slide up and down along the two guide columns, an iron block is installed at the position, right facing the electromagnetic relay, of the top of the cylindrical floater, a power generation system and a vibration sensor are installed in the cylindrical floater, the single chip microcomputer is respectively electrically connected with the vibration sensor, the controller and the electromagnetic relay, and the single chip microcomputer controls The power output end of the power generation system is electrically connected with the storage battery, and the storage battery supplies power to all parts in the self-protection system.

further, the working platform is fixedly installed at the top end of the working platform lifting device in a welding mode.

Furthermore, 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, welded and installed inside the working platform.

Furthermore, the vibration absorption block is a mass block with large density and small volume.

Furthermore, a circular groove is formed in the position, right opposite to the electromagnetic relay, of the bottom of the working platform, and the iron block is a circular iron block.

furthermore, the working platform lifting device and the vibration absorption block lifting device are telescopic tension and compression rods.

In a method of self-sustaining wave energy power generation in extreme marine environments, using the self-sustaining system described above, the improvement 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 single chip microcomputer, and the single chip microcomputer carries out real-time, comprehensive and multifunctional intelligent processing on sensed data;

(21) Under normal sea conditions, the vibration displacement amplitude is within a preset safety range, the cylindrical floater does vertical oscillation motion along with waves to drive a power generation system inside 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 safety transition range, the single chip microcomputer controls the vibration absorption block lifting device to drive the vibration absorption block to ascend through the controller, the ascending height is adjusted in real time through the single chip microcomputer according to the vibration displacement amplitude, the single chip microcomputer is also connected with the electromagnetic relay and controls the working platform lifting device to descend through the controller until the magnetic force of the electromagnetic relay attracts the iron block to attract the cylindrical floater to the bottom of the working platform, at the moment, the cylindrical floater and the working platform form a whole, and the vibration absorption block adjusts the displacement amplitude of the whole within the safety transition range;

(221) When the sea surface returns to the normal sea condition, and the vibration displacement amplitude is reduced to the preset safety range again, the single chip microcomputer controls the vibration absorption block lifting device through the controller to drive the vibration absorption block to fall to the initial position, the single chip microcomputer also disconnects the electromagnetic relay and controls the working platform lifting device to rise to the initial position through the controller, after the electromagnetic relay is disconnected, the magnetic force disappears, the cylindrical floater falls back to the sea surface again, and the cylindrical floater continues to swing along with the waves to generate electricity.

Further, in the step (1), the vibration sensor senses the vibration displacement amplitude of the cylindrical floater in real time, and the singlechip is used for sensing the vibration displacement amplitude according to a general motion equation X of the vibration displacement_msin2 π ft to determine the vibration displacement X, X_mRepresenting the vibration displacement amplitude, f representing the vibration frequency.

Further, the safe range of the vibration displacement amplitude of the cylindrical floater can be set to be 0-0.3m, the safe transition range can be set to be 0.3-0.5m, and parameter ranges can be set according to specific environments under the actual sea condition of different wave energy power generation devices.

the invention has the beneficial effects that:

The self-protecting system and the self-protecting method disclosed by the invention utilize the principle of a dynamic vibration absorber to transfer the violent vibration of the floater and the working platform under an extreme sea condition to the vibration absorber fixedly connected with the working platform, so that the acting force of the vibration absorber on the working platform and the floater just balances the wave force directly borne by the working platform and the floater, namely the vibration energy of the floater and the working platform is absorbed by the vibration absorber, thereby achieving the purpose of reducing the violent vibration of the floater and the working platform, avoiding the overturning of the working platform under the severe sea condition, and simultaneously utilizing the magnetic force to absorb the cylindrical floater to the bottom of the working platform, reducing the violent vibration of the cylindrical floater and protecting the self structure from being damaged. Therefore, the wave energy power generation device is timely and effectively protected 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 greatly impacted by wind waves and causes severe vibration under extreme sea conditions, the principle of a dynamic vibration absorber is fully utilized, the lifting device drives the vibration absorbing block to ascend to serve as an upper layer structure, the working platform and the cylindrical floater are integrated to serve as a lower layer structure, and the vibration of the lower layer structure can be eliminated when the connected upper layer structure 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, the vibration of the working platform under extreme sea conditions is reduced to the maximum extent, and the safety of the floater is powerfully guaranteed; the automatic monitoring of vibration parameters and the automatic adjustment of the rising height of the vibration absorption block can be realized, the protection efficiency is high, and the automatic vibration absorption block can adapt to 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 prevent the working platform from overturning under an extreme sea condition.

drawings

FIG. 1 is a schematic view of the dynamic vibration absorber principle utilized in the present invention;

Fig. 2 is a schematic structural diagram of the self-protection system disclosed in embodiment 1 of the present invention under normal sea conditions;

Fig. 3 is a schematic structural diagram of the self-protection system disclosed in embodiment 1 of the present invention under extreme sea conditions;

FIG. 4 is a numerical model diagram with no self-securing action taken;

Fig. 5 is a numerical model diagram in which a self-securing measure is taken.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

as shown in fig. 1, taking forced vibration of a two-degree-of-freedom steel frame system under simple harmonic load as an example, the displacement amplitudes of the upper and lower layer structures are respectively:

D₀＝(k₁₁-θ²m₁)(k₂₂-θ²m₂)-k₁₂k₂₁ (3)

F_p(t)＝F_psinθt (4)

Wherein k is₁₁＝k₁+k₂，k₁₂＝k₂₁＝-k₂，k₂₂＝k₂，k₁And k₂The rigidity coefficients of the lower rod and the upper rod are respectively; y is₂And Y₁The displacement amplitude of the upper layer structure and the lower layer structure of the system is obtained; m is₁Mass of primary system, m₂As additional system mass; f_p1And F_p2Simple harmonic loads acting on the understructure and the superstructure respectively, theta being the load frequency, where the load amplitude F_p1＝F_p，F_p2＝0。

When there is no superstructure to absorb shock, the displacement of the lower structure is:

Where omega is the natural frequency of vibration of the structure,When k is satisfied₂＝θ²m₂Under this condition

Y₁＝0 (6)

I.e. the displacement amplitude of the underlying structure is 0. The mass m of the vibration absorber in the self-protection system₂Comprises the following steps:

and the wind load born by the wind power generator after the wind power generator rises is smaller due to large density and small volume, namely the load amplitude F_p2Is close to 0; f_p1The floater bears wave load, and because the floater has larger volume, the wave force borne by the floater under extreme sea conditions is huge, which can cause the inside of the floater to vibrate violently; therefore, k is easily satisfied when the whole system is used₂＝θ²m₂Under the condition, the displacement amplitude of the lower layer structure can be effectively reduced, namely, the violent vibration of the floater and the working platform is reduced to the maximum extent.