摘要
使用先进的励磁控制技术是改善电力系统稳定性和动态品质的有效手段。采用反馈线性化和鲁棒控制理论设计的非线性鲁棒电力系统稳定器(NR-PSS)是一种先进的励磁控制装置。在深入研究电力系统稳定器(PSS)参数整定原理和NR-PSS现有参数整定方法的基础上,提出了一种基于双层规划的NR-PSS线性部分参数整定方法,以满足阻尼频带宽和控制代价低两方面要求。通过等价非线性规划可求出最优参数。仿真结果表明,应用所提出方法设定的参数可以改善NRPSS的控制效果。
Using the advanced control methods in generator excitation systems is an effective measure to improve the static and dynamic performance of power systems.The nonlinear robust power system stabilizer(NR-PSS)designed by feedback linearization and robust control is an advanced excitation control device.On the basis of an in-depth study on the principles of power system stabilizer(PSS)parameter adjustment and the existing methods of NR-PSS parameter tuning,a bi-level optimization based method is proposed for determining the parameters of the linear part of NR-PSS to meet the requirements of two aspects,namely,wider damping band and lower control costs.The optimal parameters are obtained through an equivalent nonlinear program.Numerical simulation results show that with the optimal parameters provided by the presented method,the control performance of NR-PSS is improved.
引文
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