摘要
针对风切变和塔影效应对风电机组载荷波动性的影响问题,为改善风电机组的工作性能,提出采用独立变桨距控制策略来削弱风切变和塔影效应的影响。首先建立独立变桨距控制线性时变模型,通过Coleman变换将其变换成线性时不变模型,完成独立变桨距控制系统的设计。在Bladed软件中,建立独立变桨距控制模型,并对3MW三叶片风电机组独立变桨距和统一变桨距两种控制策略进行仿真对比分析。仿真结果表明:采用独立变桨距控制策略的风电机组相比于统一变桨距控制,削弱了风切变和塔影效应的影响,延长了机组的使用寿命。
Wind shear and tower shadow can cause load fluctuation of wind turbine. In order to solve this problem, individual pitch control strategy was introduced to decrease the influence of wind shear and tower shadow. The linear time-varying model of individual pitch control was established. Then the linear time-varying system was transferred into the linear time invariant system through Coleman transformation and the design of individual pitch system was achieved. The individual pitch system model was set up using Bladed software. The individual pitch control was simulated and compared with collective pitch control. The results show that wind turbines using the individual pitch control strategies have better effect for reducing wind shear and tower shadow than collective pitch control, and extend the working life of wind turbine.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2013年第6期915-923,共9页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51075281)
辽宁省高等学校创新团队项目教育厅(LT2010081)
沈阳市科技计划项目(F11-238-1-00)
关键词
独立变桨距
Coleman变换
风切变
塔影效应
雨流计数
individual pitch control
Coleman transformation
wind shear
tower shadow
rainflow cycle counting
