摘要
为实现励磁系统非线性控制的端电压和功角双重稳定约束,基于非线性坐标变换方法,构建励磁系统非线性等价系统模型,采用鲁棒自适应设计方法实现Lyapunov函数构建、参数自适应估计和等价系统耗散稳定控制。在输出功率增加和三相接地故障状态下,对新的励磁控制方法进行仿真测试和分析。仿真结果表明:相对于传统反演鲁棒励磁控制方法,状态变量波动次数减少50%,端电压和功角稳定时间由0.2 s缩短为0.1 s,端电压始终保持为额定电压,没有出现电压偏移问题,不确定参数能够在0.05 s内完成估测。研究成果对于提高励磁系统暂态稳定能力和端电压恒定控制精度具有一定意义。
In order to realize the terminal voltage and power angle stabilization control of the excitation system, the nonlinear equivalent model of excitation system is established based on the nonlinear coordinated transformation. The design of the Lyapunov function, the adaptive estimation of the uncertain parameter and the stabilization dissipation control of the equivalent system are realized by the robust adaptive method. In the output power increasing and three-phase ground fault condition, the new excitation control method is simulated and analysed. Simulation results show, comparing with the traditional back-stepping robust excitation control method, state variables fluctuation times decreased by 50%, the terminal voltage stabilization time reduced from 0.2 sec to 0.1 sec, the terminal voltage kept to be rated value and the voltage deviation isn’t appeared, the uncertain parameter estimated in 0.05 second. The research results are important for the improving the excitation system transient ability and guaranteeing the constant of the terminal voltage.
作者
迟福建
刘聪
申刚
尚德华
田艳华
李桂鑫
王哲
CHI Fujian;LIU Cong;SHEN Gang;SHANG Dehua;TIAN Yanhua;LI Guixin;WANG Zhe(State Grid Tianjin Electric Power Company,Tianjin 300010,China;Tianjin Tianda Qiushi Electric Power High Technology Co.,Ltd.,Tianjin 300384,China)
出处
《中国测试》
CAS
北大核心
2019年第4期129-134,共6页
China Measurement & Test
基金
国家自然科学基金项目(51307184
61273114)
关键词
非线性控制
端电压及功角稳定
鲁棒自适应控制
参数自适应
励磁系统
nonlinear control
terminal voltage and power angle stabilization
robust adaptive control
parameter adaptive
excitation system
