基于内模原理的海上风电机群干扰抑制研究

Interference suppression of offshore wind turbine cluster based on internal model theory

海上风力发电系统在运行中,因非线性电力电子设备使用等受到非谐波干扰的影响,对风电机组受非谐波干扰问题进行控制研究。首先,基于Hamilton能量理论,对单机系统进行Hamilton实现;其次,针对单机系统模型,设计内模控制器,使得风电机组在输入扰动的情况下能够稳定运行;然后,考虑受扰风电机群的网络化模型,在内模控制的基础上,设计分布式控制策略,调节系统稳定输出,保证整个风电机群在受非谐波干扰情况下,能够保持稳定运行。最后,通过仿真验证了基于内模的分布式协同控制策略能够有效地抑制干扰,提高风电机群的稳定性及可靠性。

In the operation of offshore wind power generation system,the nonlinear power electronic equipments produce non-harmonic interference,so the control of non-harmonic interference on wind turbine is studied. Firstly,based on Hamilton energy theory,the Hamilton realization for a stand-alone system is achieved. Then,the internal model controller is designed for the single system model,so that the wind turbine can operate stably under input disturbance. Furthermore,considering the networked model of the disturbed wind turbine group,on the basis of internal model control,the distributed control strategy is designed to adjust the stable output of the system and ensure the stable operation of the whole wind turbine group under the condition of non-harmonic interference. Finally,the simulation verifies that the distributed cooperative control strategy based on the principle of internal model can effectively suppress interference and improve the stability and reliability of wind turbine group.