电力系统自动化2001，Vol.25Issue(7)：5-9，20,6.
汽轮发电机组的鲁棒H∞扭振滤波器
A ROBUST H∞ TORSIONAL FILTER FOR THE TURBINE GENERATOR
摘要
Abstract
The bandwidth frequency of the control system and the lowest torsional mode frequency of the shafts of the modern turbine generator have the trend to get close to each other. The torsional stability criterion imposes restriction on enhancing the performance of the turbine generator control system. In this paper, the unmodelled torsional dynamics is considered as the model perturbation of the rigid rotor and the torsional speed component is the result of the model perturbation. And then the general observer is used to estimate the rigid speed to form a new type torsional filter to suppress the torsional interaction between the control system and the shafts of the turbine generator. Different from the conventional torsional filter, the proposed torsional filter can reject the torsional component without any additional phase lag in the pass-band. Moreover, it provides additional degrees of freedom for robust design. The robustness specifications of the proposed filter related to the practical condition are developed and formulated in the form of the H∞ norm. A robust H∞ torsional filter is designed by use of the mixed sensitivity approach. The simulation results validate that the proposed robust H∞ torsional filter can provide adequate attenuation at high frequencies without any phase lag in the pass-band and has a good robustness. It can effectively prevent torsional in stability and facilitate the practical application of the high speed and high performance control systems of turbine generators.关键词
汽轮发电机组/控制系统/扭振相互作用/鲁棒H∞扭振滤波器分类
信息技术与安全科学引用本文复制引用
王西田,于达仁,鲍文..汽轮发电机组的鲁棒H∞扭振滤波器[J].电力系统自动化,2001,25(7):5-9，20,6.基金项目
国家重点基础研究专项经费(G1998020319)和国家自然科学基金(59576043)资助项目。 （G1998020319）
