海上风电场双馈风电机群分布式协同控制研究

Distributed Cooperative Control Research of Doubly Fed Wind Turbine Groups in Offshore Wind Farms

针对海上风电场中双馈风电机群,基于Hamilton能量理论提出分布式协同控制策略,使闭环系统全局稳定且输出同步。将双馈风电机组单机模型拓展为含风电场网络拓扑的机群模型,利用分布式Hamilton系统设计方法,构造风电场多机系统的分布式协同控制策略。进一步,考虑到实际系统输入能量有限的客观情况,提出输入有界情况下的分布式协同控制设计方法,保证闭环系统全局稳定且输出同步。最后,通过仿真验证,分布式协同控制策略增强了系统的适应性,而且在输入有界约束下仍具有较好的控制效果。

A distributed cooperative control strategy for doubly fed wind turbine groups in the offshore wind farms was proposed, which was based on Hamilton energy theory to make the closed-loop system globally stable and output synchronous. The single-machine model of doubly fed wind turbines was extended to a cluster model with the network topology of wind farms. And the distributed cooperative control was constructed by using the design method of distributed Hamilton systems. Furthermore, considering the actual conditions of the input energy of the practical systems, the distributed cooperative control design method with bounded input was proposed to guarantee the global stability and the output synchronization of the closed-loop system. The simulation results show that the distributed cooperative control strategy improves the adaptability of closed-loop systems, and has good control effects under the constraints of bounded input. © 2016 Chin. Soc. for Elec. Eng.