【摘要】 针对双馈式变速变桨风力发电机组在运行中的不确定性、非线性、多变量、强耦合、时滞等特性,对其控制技术进行研究,建立起了变速变桨风力机组结构分散化模型,它由4个单元模型、2条因果链和2支链间关联的模型构成。在此模型的基础上,根据链系统的预估机制和控制方案,给出了以风力机转速和风轮输出转矩为受控量的关联系统的结构分散化控制算法。仿真结果表明,与传统的PI控制方法相比,该新型控制系统应用于双馈式变速变桨风力发电机组的过程控制,不需要进行繁琐的PI参数整定,稳定性、抗干扰和容错能力较好,具有重要的实际意义和应用价值。更多还原

【Abstract】 For the features of uncertainty, nonlinearity, multi-variables and strong coupling and time delays during the operations of doubly-fed variable speed and pitch wind turbine units, the paper studies its control strategies. A structure decentralized model is built which is consisted of four unit models,two causality chains and two inter-chain association via the control method of chain system. On the basis of this model, the structurally decentralized control algorithm is designed for the connection system with the wind turbine speed and wind turbine output torque as its controlled outputs. This new control system is applied in doubly-fed variable speed and pitch wind turbine units. The simulation result indicates that this method possesses excellent stable characteristic, anti-jamming abilities and fault-tolerant capacity compared with the conventional control methods, furthermore, it does not need the cumbersome PI parameter tuning and has important actual significance and practical application value.更多还原