一阶LADRC的风电并网控制及其稳定性分析  

Control of Wind Power Grid-connection Based on First-order LADRC and Its Stability Analysis

作　　者：朱士加 王颖 贺春光 凌云鹏 陶珑 周雪松 ZHU Shijia;WANG Ying;HE Chunguang;LING Yunpeng;TAO Long;ZHOU Xuesong(Economic and Technological Research Institute,State Grid Hebei Electric Power Supply Co.,Ltd,Shijiazhuang 050011,China;School of Electrical and Electronic Engineering,Tianjin University of Technology,Tianjin 300384,China)

机构地区：[1]国网河北省电力有限公司经济技术研究院,石家庄050011 [2]天津理工大学电气电子工程学院,天津300384

出　　处：《电力系统及其自动化学报》2020年第7期33-38,共6页Proceedings of the CSU-EPSA

基　　金：国家自然科学基金资助项目(51877152);天津市自然科学基金资助项目(18JCZDJC97300)。

摘　　要：风电系统的稳定性对电网安全十分重要,提高风电并网的稳定性依然是当今研究的热点所在。针对永磁直驱风电系统的强耦合以及系统投运后网侧、机侧的波动问题。本文首先分析了永磁直驱风电系统的数学模型和暂态特性;然后在电压环引入一阶线性自抗扰控制器LADRC(linear active disturbance rejection controller),以其代替传统PI控制器;再通过李雅普诺夫理论分析了采用一阶LADRC时系统的稳定性,得出系统在工程意义上是稳定的。最后,在Matlab/Simulink数字平台进行了仿真测试。多工况下的仿真结果表明,该改进方法与PI控制器相比,具有更优的快速性和抗扰性。The stability of wind power systems is important for the safety of power grid,and the improvement of wind power grid-connection is still the hot spot of research at present. Aimed at the strong coupling of a permanent magnet direct drive wind power system and the fluctuations on the grid-and machine-side after it is put into operation,the mathematical model and transient characteristics of this system are analyzed at first. Then,the first-order linear active disturbance rejection controller(LADRC)is introduced to the voltage loop to replace the traditional PI controller. Furthermore,the stability of the system based on the first-order LADRC is analyzed using the Lyapunov theory,indicating that the system is stable in the engineering significance. Finally,a simulation test is carried out on the Matlab/Simulink digital platform. Simulation results show that under multiple working conditions,the improved method has better rapidity and disturbance rejection capability compared with the PI controller.

关 键 词：强耦合 永磁直驱风电系统 线性自抗扰控制器 李雅普诺夫稳定性 抗扰性 

分 类 号：TM464[电气工程—电器]