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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。
Aiming at the interval oscillation of multi-area interconnected system, an analysis and design method of adaptive fuzzy wide area damping control system is proposed. First of all, determine the installation location of the control loop by the number of transfer letters, and use the angular angular deviation of the equivalent angular center of the mode as the feedback signal of each loop. Then, to improve the damping of the dominant interval oscillation mode excited by different faults, the design of fuzzy control system is transformed into the planning problem with inequality constraints. Finally, the genetic algorithm is used to solve the planning model, and the parameters of multiple control loops are coordinated and optimized. In the process of optimization, the multi-zone single-machine equivalent method is introduced to identify the dominant mode of system oscillation after failure and to evaluate the damping. The example uses IEEE5 area 16 machine system. The simulation results show that the control system significantly improves the damping of the oscillation modes in different sections and effectively suppresses the system oscillation after the fault.