摘要
针对双馈发电机的参数变化及外部扰动对网侧PWM的影响的问题,传统PI调节在响应速度,控制精度上表现并不令人满意。由于滑模变结构控制对外部干扰及内部参数变化鲁棒性强,文章提出采用高阶滑模变结构控制网侧PWM对PI控制器进行改进。首先介绍了双馈发电机网侧PWM部分的数学模型,提出高阶滑模变结构策略对其控制。仿真结果可以得出,与PI控制器相比,高阶滑模控制器在应对外部干扰及内部参数变化时能够快速调节直流母线电压,表现出优良的动态特性。
Aiming at the problem of parameters changing of doubly-fed generator and other external interference influence on the grid side PWM,the traditional PI control did not behave very well in terms of the response speed and control precision on performance. For the above problems,the sliding mode variable structure control showed perfect robustness. In order to improve the deficiency of PI controller,this paper put forward the high-order sliding mode controlling the grid side PWM. First of all,this paper introduced the mathematical model of doubly-fed generator of the grid side PWM,and proposed the high-order sliding mode variable structure strategy. From the simulation results,we could summarize that comparing with the PI controller,high-order sliding mode control could adjust the DC bus voltage more rapidly and show better dynamic characteristics.
出处
《电测与仪表》
北大核心
2016年第13期44-48,89,共6页
Electrical Measurement & Instrumentation
关键词
双馈发电机
网侧PWM
鲁棒性
高阶滑模变结构
doubly-fed generator
grid side PWM
robustness
high-order sliding mode variable structure
