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中文摘要：
针对爬山法（hill-climbing searching,HCS）在最大功率点（maximum power point,MPP）处存在的转速振荡和风速变化导致搜索方向误判的问题,提出1种具有扰动停止机制的改进爬山算法。该算法不仅继承了变步长爬山法快速搜索至MPP附近的优点,还具有MPP检测和停止机制。在风机跟踪至MPP附近时,该机制不仅可以有效降低转速振荡对风机系统机械部件的磨损,而且克服了算法停止机制生效后风速再次变化时对搜索方向判断的干扰,从而进一步提高了风能捕获效率。在简化风电系统模型的基础上,仿真结果验证了该算法的有效性和优越性。
英文摘要：
To avoid oscillations of rotor speed at maximum power points（MPP） and to overcome wrong searching directions for MPPs due to the turbulence of wind speed,an improved hill-climbing searching（HCS） method for maximum power point tracking（MPPT） was proposed.It not only inherits the advantage of the variable-step HCS method so that MPP can be rapidly reached,but also introduces the mechanisms of detection and halt at MPP.Thus,the mechanical damage to wind turbines around MPP,resulted from rotor speed oscillations can be effectively reduced.Moreover,following the halt of HCS,the disturbance to determinations of searching directions caused by wind speed variations was resolved and as a result more wind energy was captured.Based on a simplified model of the wind energy conversion system,simulation studies were presented to verify the effectiveness and advantage of the improved method.
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