摘要
电力系统次同步振荡阻尼控制器设计中,系统等值简化的准确度和控制器的鲁棒性对控制器的效果影响很大。通过对输出信号动态时域数据Prony辨识求得2008年南方电网贵广Ⅱ直流系统的等值降阶线性模型,利用基于时域仿真的复数力矩系数分析出该系统在弱连接和孤岛两种运行方式下易发生次同步振荡的模式,并针对监测出的振荡模式,采用H∞最优控制理论设计出抑制次同步振荡的附加直流阻尼控制器,最后电磁暂态时域仿真结果验证了该控制器抑制次同步振荡模式的效果明显,并具有一定的鲁棒性。
In the analysis of sub-synchronous oscillation in power system,the accuracy of system equivalent and robustness of the controller have a great influence on its effectiveness.Equivalent reduced order linear model of a special DC system can be obtained from prony identification of output signal dynamic time-domain data.This paper is mainly focused on two modes：weakly connected mode and solitary island mode.By utilizing the complex variable function theory based on time domain simulation modes which is prone to happen SSO is identified.Aming at those monitored oscillation modes,a additional subsynchronous damping controller based on H∞ optimal control theory is designed to suppress these oscillation modes.EMTDC simulation results show that this controller is robust and can suppress subsynchronous oscillation effectively.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2010年第6期1-5,共5页
Proceedings of the CSU-EPSA
基金
国家科技支撑计划项目(2008BAA13B01)
国家自然科学基金资助项目(50877050)
关键词
PRONY算法
H∞最优控制理论
次同步振荡
次同步阻尼控制器
时域仿真
Prony algorithm
H∞ optimal control theory
subsynchronous oscillation（SSO）
subsynchronous damping controller（SSDC）
time region simulation.
