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CN-122009417-A - Marine floating fan platform foundation with stability compensation

CN122009417ACN 122009417 ACN122009417 ACN 122009417ACN-122009417-A

Abstract

The application relates to the field of offshore floating wind power, in particular to an offshore floating fan platform foundation with stability compensation, wherein a stability compensation system, a vibration reducing device and a control system are arranged in a semi-submersible platform, the semi-submersible platform foundation comprises vertical columns which are circumferentially arrayed around a tower cylinder, the vertical columns are fixedly connected with the tower cylinder through steel beams, watertight isolated empty cabins and ballast cabins are arranged in the vertical columns, the stability compensation system comprises a hydraulic device positioned in the vertical columns and a ballast device positioned in the watertight isolated empty cabins, the vibration reducing device comprises a plurality of groups of spiral strakes, a water pressing plate and streamline guide plates, the control system comprises a control processor, a plurality of groups of acceleration sensors, angle sensors and depth sensing pipes, the acceleration sensors and the angle sensors are positioned in the isolated empty cabins, and the depth sensing pipes are positioned in the ballast cabins of a compensation pontoon. According to the application, a compensation mode which influences the power generation efficiency, such as over-dependence on pitch variation, is not needed, the stability compensation effect is improved, and multiple stability guarantees are provided for the platform.

Inventors

  • QIN WEI
  • HE XINCHEN
  • LIU HUAXING
  • MENG XIANBO
  • ZHANG XINHAO

Assignees

  • 瀚辰精英海洋工程(江苏)有限公司

Dates

Publication Date
20260512
Application Date
20260320

Claims (8)

  1. 1. The offshore floating type fan platform foundation with stability compensation is characterized by comprising a semi-submersible type platform foundation (1), wherein a stability compensation system (5), a stabilizer (6) and a control system (7) are arranged in the semi-submersible type platform; The semi-submersible platform foundation (1) comprises vertical columns (11) circumferentially arrayed around a tower cylinder (2), wherein the vertical columns (11) are fixedly connected with the tower cylinder (2) through steel beams (12), watertight isolation empty cabins (3) and ballast cabins (4) are arranged in the vertical columns (11), and annular areas formed by the outer walls of the watertight isolation empty cabins (3) and the inner walls of the bottoms of the vertical columns (11) are the ballast cabins (4); The stability compensation system (5) comprises a hydraulic device (51) positioned in the vertical upright post (11), the hydraulic device (51) is connected with a compensation pontoon (53) right below the vertical upright post (11) through a push rod (512) at the output end of the hydraulic cylinder (511), and the stability compensation system (5) also comprises a ballast device (52) positioned in the watertight isolation empty cabin (3); The anti-rolling device (6) is arranged on the outer side of the compensation pontoon (53) and comprises a plurality of groups of spiral strakes (61) uniformly fixed on the outer edge of the compensation pontoon (53), a water pressing plate (63) which is circular and is fixed on the bottom of the compensation pontoon (53), and a streamline guide plate (62) which is rotationally connected with a groove (5121) on the push rod (512) through a sealing structure, wherein the streamline guide plate (62) is a water drop type spiral symmetrical structure with a through hole in the center; The control system (7) comprises a control processor (71), a plurality of groups of acceleration sensors (72), angle sensors (73) and a sounding pipe (74), wherein the control processor (71) is located in the vertical column (11), the acceleration sensors (72) and the angle sensors (73) are located in the isolation empty cabin, and the sounding pipe (74) is located in the ballast tank (4) of the compensation pontoon (53).
  2. 2. The offshore floating type fan platform foundation with stability compensation according to claim 1, wherein the vertical upright posts (11) are provided with three groups or four groups, comprise a top main body (111) and a bottom pontoon (112) and are of a stepped integrated structure, the diameter of the bottom pontoon (112) is larger than that of the top main body (111), and a cylindrical opening (1121) is formed in the central area of the bottom pontoon (112).
  3. 3. An offshore floating wind turbine platform foundation with stability compensation according to claim 2, wherein the steel beams (12) comprise cross beams (121), cross beams (122) and diagonal beams (123), wherein the top main bodies (111) and the tower (2) are connected through the horizontal cross beams (121), the bottom pontoons (112) and the tower (2) are connected through the horizontal cross beams (122), one end of each diagonal beam (123) is connected to the top of the top main body (111), the other end of each diagonal beam (123) is connected to the bottom of the tower (2), and the included angle between each diagonal beam (123) and the cross beams (121) and between each diagonal beam (122) is 40-50 degrees.
  4. 4. The offshore floating type fan platform foundation with stability compensation according to claim 1, wherein the compensation pontoon (53) comprises an upper section vertical hollow column (531) and a lower section truncated cone (532) with a large top and a small bottom, wherein the inner diameter of the vertical hollow column (531) is larger than the outer diameter of the bottom pontoon (112) and is movably sleeved outside the bottom pontoon (112), the truncated cone (532) is of a hollow structure, and a plurality of groups of ballast tanks (4) are arranged in the truncated cone.
  5. 5. The offshore floating type fan platform foundation with stability compensation according to claim 4, wherein a coupler (513) is arranged at the middle section of a push rod (512) at the output end of the hydraulic cylinder (511), the free end of the push rod (512) penetrates through the axis of an upper section vertical hollow cylinder (531) of the compensation pontoon (53) and is connected with the top center of a lower section round table body (532), and three groups of grooves (5121) with different heights are formed in the outer side of the push rod (512).
  6. 6. The offshore floating type fan platform foundation with stability compensation according to claim 1, wherein the ballast device (52) comprises a horizontal end suction centrifugal pump (521), an air compressor (522) and a flexible hose (523), the horizontal end suction centrifugal pump (521) and the air compressor (522) are both positioned in a watertight isolation empty cabin (3), the horizontal end suction centrifugal pump and the air compressor are respectively connected with parallel branches of the flexible hose (523) through flanges, and the flexible hose (523) extends downwards until entering the ballast cabin (4) of the compensation pontoon (53).
  7. 7. The offshore floating type fan platform foundation with stability compensation according to claim 1, wherein the diameter of the water pressing plate (63) is 1.5-2 times of the diameter of the round table at the bottom of the compensation pontoon (53), and the streamline guide plates (62) are provided with a plurality of groups and are installed in a staggered manner along different directions.
  8. 8. The offshore floating type fan platform foundation with stability compensation according to claim 1, wherein the sealing structure comprises a watertight sleeve and a bearing in a central through hole of the streamline guide plate (62), the streamline guide plate (62) is connected with the bearing through the watertight sleeve, and the axis of the bearing penetrates through the push rod (512) and is fixed in a groove (5121) of the push rod (512).

Description

Marine floating fan platform foundation with stability compensation Technical Field The application relates to the field of offshore floating wind power, in particular to an offshore floating fan platform foundation with stability compensation. Background With the vigorous development of wind power technology, the floating fan breaks through the limitation of water depth and gradually moves to deep open sea with rich wind energy resources. The influence of wind, wave and current coupling effect on guaranteeing the stability, safety and power generation efficiency of the floating fan platform is a current technical hot problem. At present, stability adjustment technologies of floating fan platforms are mainly divided into passive stabilization technologies and active stabilization technologies. The passive stabilization technology is to ensure that the floating foundation floating center is lower than the gravity center as much as possible when the passive stabilization technology is designed in the earlier stage, increase the sectional area of the platform on the water plane to increase the hydrostatic restoring force, provide restoring force by means of the tension of a mooring system, install a tuned mass damper in the platform, and offset the stress motion caused by external loads of wind wave flow partially by the motion inertia of the mass block. Common active stabilization techniques are fan pitch regulation, active tower damping regulation, and automatic mooring systems. The wind turbine pitch technology is used for adjusting the postures under different wind speeds through adjusting the angles of blades to form additional restoring moment to ensure the stability of a platform, the active tower damping adjustment is used for adjusting the length of a mooring cable through a winch to control the tension by installing a hydraulic system on a wind turbine tower, detecting the acceleration of the top of the tower, forming active damping gain through a damping control ring and restraining the movement of the platform, and the automatic mooring system is used for dynamically detecting the mooring tension, a six-degree-of-freedom movement system of the platform, the wind speed, the flow speed, the wave height and other environmental information. In the conventional technology, firstly, a system is complex, an environment is required to be monitored in real time, the fan and the platform stress are balanced through an algorithm, so that the motion gesture is adjusted, the cooperation of multiple systems is required, the maintenance cost is high, secondly, the conventional compensation technology has limited counteracting effect on the motion and cannot compensate the essential defects of high gravity center and poor stability of a floating fan platform, thirdly, the gesture is adjusted to compensate by a pitch-changing method and the like, the power generation efficiency is influenced, electric power fluctuation is generated, and the economic benefit is influenced, and thirdly, the influence on wave and current loads is limited mainly aiming at the influence of wind load on the platform. Disclosure of Invention The application provides a sea floating fan platform foundation with stability compensation and a working method thereof, aiming at solving the problems of higher maintenance cost, limited action effect and need of sacrificing power generation efficiency and adjusting the posture of the conventional technical scheme. The application provides a sea floating fan platform foundation with stability compensation, which adopts the following technical scheme: The offshore floating type fan platform foundation with the stability compensation comprises a semi-submersible platform foundation, wherein a stability compensation system, a stabilizer and a control system are arranged in the semi-submersible platform; the semi-submersible platform foundation comprises vertical columns which are circumferentially arrayed around a tower cylinder, wherein the vertical columns are fixedly connected with the tower cylinder through steel beams, watertight isolation empty cabins and ballast tanks are arranged in the vertical columns, and annular areas formed by the outer walls of the watertight isolation empty cabins and the inner walls of the bottoms of the vertical columns are ballast tanks; the stability compensation system comprises a hydraulic device positioned in a vertical upright post, the hydraulic device is connected with a compensation pontoon under the vertical upright post through a push rod at the output end of a hydraulic oil cylinder, the stability compensation system also comprises a ballast device positioned in a watertight isolation empty cabin, a stabilizer is arranged at the outer side of the compensation pontoon and comprises a plurality of groups of spiral strakes uniformly fixed at the outer edge of the compensation pontoon, so that vortex-induced vibration can be restrained, damping is increased, hy