风机紧急顺桨载荷分析与系统优化研究

Emergency Propeller Load Analysis and System Optimization of Wind Turbine Generator

采用数学解析法推导出风机液压变桨驱动力矩计算公式,将紧急顺桨载荷细分为从20°开始紧急顺桨的载荷和从0°开始紧急顺桨的载荷,并指出紧急顺桨蓄能器布置位置对电液滑环通流量的影响,建立了液压变桨系统AMESim仿真模型,仿真结果表明:蓄能器压力随桨距角变化而逐渐衰减,将载荷细分能减小蓄能器的装机容量,将蓄能器部分布置于轮毂能降低电液滑环的峰值流量。

The calculation formula of hydraulic variable propeller driving torque is deduced by usin g mathematical analysis method.The emergency paddle load is subdivided into two parts:the emergency paddle load from 20°and the emergency paddle load from 0°.The influence of the position of the accumulator on the flow rate of the electro-hydraulic sliding ring is pointed out,and the AMESim simulation model of the hydraulic variable propeller system is established.The simulation results show that the accumulator pressure decreases gradually with the change of pitch angle,the load subdivision can reduce the installed capacity of the accumulator,and the peak flow rate of the electro-hydraulic sliding ring can be reduced by placing the accumulator part in the hub.