基于多目标优化的时滞广域阻尼控制器设计

提出一种考虑区间模式和本地模式协调的时滞广域阻尼控制器设计新方法。首先,根据能控能观指标找出最佳反馈信号和输出控制量。然后,计算超前滞后补偿的时间常数,并构建区间和本地模式协调优化的多目标函数,应用"教与学"优化算法确定最优增益序列。最后,应用均衡降阶算法对系统进行降阶,基于线性矩阵不等式(LMI)理论分析最优增益序列,选出对时滞鲁棒性最好的值。新英格兰测试系统的仿真结果表明,提出的基于多目标优化的时滞广域阻尼控制器设计方法,在很好地抑制了区间振荡模式的同时,保证本地振荡模式不被恶化,并且对时滞具有很好的鲁棒性。

Design of multi-objective optimization based time delay wide area damping controller

A new design method of the time delay wide area damping controller considering the coordination between inter-area mode and local mode is proposed. First, the best feedback signal and the output control signal are found out based on controllability and observability. Then, the time constant of a lead-lag compensation controller is calculated and the multi-objective optimization function is built considering coordination between inter-area mode and local mode, and the optimal gain sequence is determined by using the teaching learning based optimization (TLBO) algorithm. Finally, the order of the system is reduced using the balanced order reduction algorithm, the optimal sequence is analyzed based on linear matrix inequality (LMI) theory, and the best value with time delay robustness is selected. The simulation results of New England test system show that the multi-objective optimization based time delay wide area damping controller can damp the inter-area oscillation mode while ensure the local oscillation mode not deteriorate, and it has good robustness for time delay.