海上风电海缆风机端弯曲保护装置及安装技术研究

Research on End-bending Protection Device and Installation Technology of Offshore Wind Power Cable Wind Turbine

由于海缆弯曲刚度较小,在风机单桩基础附近的这段海缆在位运行过程中受到洋流、涌浪、潮汐等动态载荷作用下,海缆容易发生弯曲破坏,因此需要对海缆采取弯曲保护措施。提出一种夹具倒刺型海缆弯曲保护装置,并详细介绍了该夹具倒刺型海缆弯曲保护装置的工作原理以及接入风机基础的安装流程和注意事项。相对于传统的海缆弯曲保护方式而言,该装置不需要J形管及配套的金属套笼,采用的多层交错自回弹的倒刺卡齿结构,可以将海缆定位限制在风机塔筒壁的电缆开孔处,尾部的弯曲限制器保证了对悬空段海缆的弯曲保护,有效保证了海缆安全的同时又降低了工程造价。研究成果能够为我国海上风电场建设中的海缆弯曲保护提供技术参考。

Due to the small bending stiffness of the submarine cable,the submarine cable near the single pile foundation of the fan is prone to bending damage under the dynamic load such as ocean current,surge wave and tide,so it is necessary to take bending protection measures for the submarine cable.A clamping barb type submarine cable bending protection device is proposed,and its working principle,installation process and precautions of access fan foundation are introduced in detail.Compared with the traditional bending protection method of submarine cable,the device does not need J-shaped tube and supporting metal sleeve cage.The multi-layer staggered self-rebound barb clamp structure can restrict the positioning of submarine cable to the cable opening on the wall of the fan tower,and the bending limber at the tail ensures the bending protection of the suspended submarine cable.Effectively ensure the safety of the submarine cable and reduce the project cost.The research results can provide technical reference for submarine cable bending protection in the construction of offshore wind farms in China.