摘要
为充分考虑双馈感应发电机(doubly-fed induction generator,DFIG)故障状况下的非线性特性,使用一种参数自适应超扭曲滑模控制器(super-twisting adaptive sliding mode control,STASMC)对多输入多输出(multiple input multiple output,MIMO)系统的零动态(zero dynamics,ZD)方法进行改进,提出一种ZDSTASMC控制方法用来提高DFIG的暂态电压稳定性.使用ZD方法解耦了原始系统的内部和外部动态,简化控制设计任务.为进一步提高在参数不确定性和外部扰动下的电压调节能力,将ZD方法与STASMC相结合,通过STASMC构造辅助输入提升了DFIG的暂态性能,减少建模误差和实际过程中各种误差的影响.改进后的ZD方法可减小线性化误差的影响,加强了DFIG的暂态性能.通过算例在三相故障下的仿真,验证了所提ZD-STASMC控制相比ZD控制方法以及常规比例-积分控制方法,在故障期间有更好的暂态性能,故障切除后也能更快恢复稳定.ZD-STASMC策略能有效增强DFIG的故障穿越能力.
In order to fully consider the nonlinear characteristics of the doubly-fed induction generator(DFIG)fault condition,we propose a ZD-STASMC method of zero dynamics(ZD)combined with super-twisting adaptive sliding mode control(STASMC)to improve the transient voltage stability of DFIG,which applies the adaptive STASMC to improve the ZD method for multiple input multiple output(MIMO)systems.The use of ZD method decouples the internal and external dynamics of the original system,which simplifies the control design tasks.To further enhance voltage regulation in the presence of parameter uncertainties and external disturbances,the ZD approach is combined with the STASMC through which the transient performance of DFIG is improved by constructing auxiliary input,by reducing the influence of modeling errors and various errors in the actual process.The use of the improved ZD technique can reduce the influence of linearization error and enhance the transient performance of DFIG.Through the simulation model under the three-phase faults,it is verified that the proposed ZD-STASMC control has better transient performance during faults,and can recover stability faster after fault removal,compared with the ZD control method and the conventional proportion integration(PI)control.The proposed strategy can effectively enhance the fault traversing capability of DFIG.
作者
张晓英
舒子江
吴宏强
ZHANG Xiaoying;SHU Zijiang;WU Hongqiang(College of Electrical and Information Engineering,Lanzhou University of Technology,Lanzhou 730050,Gansu Province,P.R.China;Gansu Dentsu Electric Power Engineering Design Consulting Co.Ltd.,Lanzhou 730050,Gansu Province,P.R.China)
出处
《深圳大学学报（理工版）》
CAS
CSCD
北大核心
2023年第5期599-607,共9页
Journal of Shenzhen University(Science and Engineering)
基金
国家自然科学基金资助项目(51867015,61963024)。
关键词
风能发电
可再生能源
双馈感应发电机
非线性控制
零动态方法
超扭曲滑模控制:故障穿越
wind-electricity
renewable energy
doubly-fed induction generator(DFIG)
nonlinear control
zero dynamics method
super-twisting sliding mode control
fault ride-through
