基于混沌优化算法的高压直流次同步阻尼控制器的设计

Design of HVDC Subsynchronous Damping Controller Based on Chaotic Optimization Algorithm

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。基于混沌优化算法可用于控制器参数寻优,且可避免陷入局部最优的特点,提出利用此算法设计附加次同步阻尼控制器。通过此算法,以阻尼比为目标函数,寻找出系统在不同运行方式下的控制器最优参数,从而达到抑制次同步振荡的作用。以南方电网贵广II号直流输电工程作为实例模型,分别利用PSCAD/EMTDC仿真程序和矩阵束算法验证此阻尼控制器的有效性。

HVDC transmission system may lead to subsynchronous oscillation under certain circumstances.Chaotic optimization algorithm,applicable for controller parameters optimization and superior in avoiding local optimization,is adopted to design a subsynchronous oscillation damping controller.Thereby taking the damping ratio as target function,the optimum controller parameters of the system in various operation modes are calculated to suppress subsynchronous oscillation.Taking the simulation models for Guiguang II HVDC project in Southern China power grid for a case study,the simulation results of PSCAD/EMTDC electro-magnetic programs and matrix pencil algorithm verify the validity of the proposed subsynchronous damping controller.