Spar型漂浮式风力机断缆影响及运动稳定性研究

STUDY ON MOORING BREAKAGE EFFECTS AND MOTION STABILITY OF SPAR-TYPE FLOATING OFFSHORE WIND TURBINE

为探究系泊断裂对漂浮式风力机造成的影响,建立基于Spar平台的漂浮式风力机多刚体动力学模型,研究在正常运行工况以及风浪存在不同夹角工况下系泊断裂对其动力响应的影响,通过考虑漂浮式风力机断缆前后的运动稳定域探讨两种风电场布置的可行性。结果表明:漂浮式风力机的纵荡与横荡运动受系泊断裂的影响较大,且位于荷载方向两侧的系泊相比其他系泊在发生断裂后对风力机运动响应的影响更大;对于风浪夹角工况,30°以下的风浪夹角不会增大系泊断裂给漂浮式风力机带来的不利影响;对于采用共享锚链锚固点的风电场布置而言,星形布置方式存在相邻风力机碰撞的风险,宜采用安全距离较大的六边形布置。

To investigate the effect of mooring breakage on floating wind turbines(FOWT),a multi-body dynamics model based on Spar platform is developed to study the effect of mooring breakage on the dynamic response of FOWT under operating conditions and misaligned wind and wave conditions,and the feasibility of two wind farm arrangements are discussed by considering the motion stability field before and after the breakage of mooring.The results show that:the surge and sway of FOwT is more affected by the mooring breakage,and the mooring lines located on both sides of the load direction have more influence on the wind turbine motion response after the breakage than the moorings at other locations;for the misaligned wind and wave conditions,the angle of wind and wave below 30°does not increase the adverse effect of the mooring breakage on the FOWT;for wind farms with shared anchors,the starshaped arrangement has the risk of collision with neighboring turbines,and it is appropriate to adopt the hexagonal arrangement with larger safetydistance.