基于广域信号的柔性直流输电附加阻尼控制

Design of VSC-HVDC supplementary controller based on wide-area signals

柔性直流输电具有灵活可控的特点,而广域信号或广域信号的组合具有可控、可观性好和相位关系稳定等特点。结合柔性直流输电和广域信号的优点设计了柔性直流输电广域稳定控制器。利用扩展留数比选择最优的广域信号或其组合作为反馈输入,利用极点配置的方法确定附加阻尼控制器的参数。数值仿真结果表明基于广域信号为输入的阻尼控制器在系统振荡时能很好地阻尼功角振荡。

The controllability of the VSC-HVDC is very good and flexible. The wide area signal or their combination has good controllability and obscrvability. The VSC-HVDC supplementary controller with the global feedback signal was designed. Then the global damping controller was designed based on the extended residue ratio （ERR）. According to the pole placement method, the time constant and the gain of the controller were determined. The act of the controller was tested based on the example of a four-machine and two-area system.