抑制区间振荡的自适应模糊广域阻尼控制设计

Self-adaptive Fuzzy Wide-area Control Design for Damping Inter-area Oscillations

针对多区域互联系统的区间振荡,提出一种自适应模糊广域阻尼控制系统的分析和设计方法。首先,通过传函留数确定控制回路的安装地点,并以"模式可观惯量中心"等值的区间角速度偏差作为各回路的反馈信号。然后,以提升不同故障激发的主导区间振荡模式的阻尼为目的,将模糊控制系统的设计转化为带不等式约束的规划问题。最后,采用遗传算法求解规划模型,对多个控制回路的参数进行协调和优化。在优化过程中引入多区域单机等效法辨识故障后系统振荡的主导模式,并进行阻尼评估。算例采用IEEE5区域16机系统。仿真结果表明:控制系统显著改善了不同区间振荡模式的阻尼,有效抑制了故障后系统的振荡。

A systematic method to analyze and design self-adaptive fuzzy wide area damping control systems which aims to damp inter-area oscillations of multi-area inter- connected power systems was proposed in this paper. Firstly, transfer function residues and inter-area speed differences equivalent by observable center of inertia were used to define control loop locations and feedback signals respectively. Secondly, control parameters were necessary to be coordinated and optimized to improve damping of inter-area oscillations induced by different faults. The objection was achieved via constructing a programming model with inequality constraints. Lastly, genetic algorithm was used to solve the model. And multi-area single machine equivalent method was introduced to identify domain oscillation modes and assess damping during the optimization procedure, An IEEE five-area-sixteen- machine system was used to test the efficiency. Test results show that the control system dramatically increases damping of various inter-area modes and effectively damps post-fault oscillations.