一类非线性系统鲁棒控制及应用
来源期刊：中南大学学报(自然科学版)2003年第2期
论文作者：张敏 罗安
文章页码：188 - 191
关键词：非线性系统;鲁棒控制;单机-无穷大系统;线性化
Key words：nonlinear system; robust control; single-machine infinite-bus system; linearization
摘 要：包含不确定扰动项的线性系统的鲁棒控制表现为L2增益抑制问题.利用非线性系统线性化技术,将包含不确定性的非线性模型进行部分线性化处理.以此为基础,利用线性系统的鲁棒控制理论,讨论了单机-无穷大电力系统,得出发电机的励磁鲁棒控制器;针对发生三相短路故障的线路末端,给出了其发电机功角、角速度和输出电压的仿真曲线.研究结果表明:鲁棒控制器在提高系统稳定性、稳定系统输出电压等方面有良好的控制效果.
Abstract: The robust control for linear system with uncertain disturb is discussed, which behaves as L2-gain restraint. With linearization for nonlinear system, the nonlinear system with uncertainty is linearized. Based on this, the single-machine infinite-bus power system is studied and the robust controller of excitation for generator is obtained. An example is given that the fault of a three-phase short circuit occurs on the end of the transmission line and is removed in certain period. The simulation curves of the power-angle, angle velocity and voltage output are given, and the robust controller has good effect with respect to improvement for system stability and voltage output.
