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高压直流输电系统在一定条件下可能引发系统的次同步振荡。基于复数力矩系数原理与模糊免疫的方法设计了次同步阻尼控制器。该控制器检测到系统的次同步振荡信号后,能根据振荡情况对控制器参数进行自适应调整,整个控制器结构简单、稳定性强且易于工程实现。以2008年南方电网贵广Ⅱ直流系统为例,电磁暂态时域仿真结果表明了该方法应用于次同步阻尼控制器设计的有效性。
Under certain conditions, HVDC transmission system may cause subsynchronous oscillation of the system. The subsynchronous damping controller is designed based on the principle of complex moment coefficient and fuzzy immune. After the controller detects the subsynchronous oscillation signal of the system, it can adjust the controller parameters adaptively according to the oscillation condition. The controller is simple in structure, strong in stability and easy to realize in engineering. Taking the Gui-Guang II DC system of China Southern Power Grid in 2008 as an example, the simulation results of electromagnetic transient time domain show the effectiveness of this method in the design of subsynchronous damping controller.