摘要
Abstract
Multi-terminal high voltage direct current transmission based on voltage source converter(VSC-MTDC)has become an effective measure for the large-scale delivery of new energy.However,with the increasing penetration rate of renewable energy,the overall inertia of the grid is decreased.Traditional proportional integral differential(PID)control has a long adjustment time and large fluctuation amplitude under large load disturbances.As the active disturbance rejection controller(ADRC)has adaptability to time-varying and uncertain disturbances,ADR is used to flexible HVDC system.Particle swarm optimization(PSO)algorithm is used to adjust the parameters,and the secondary frequency modulation of VSC-MTDC system is conducted by means of the improved ADR additional frequency control.The four-terminal flexible DC control system model is established on the Simulink platform,and the model simulation is conducted in two situations:the converter station is out of operation due to failure and the AC system load is suddenly changed.The results show that in comparison with traditional PID additional frequency control,the designed ADRC additional frequency control has faster response speed,stronger adaptability,and smaller overshoot.关键词
自抗扰控制/柔性直流输电/粒子群优化算法/附加频率控制/PID控制/参数整定Key words
active disturbance rejection control/flexible DC transmission/particle swarm optimization algorithm/additional frequency control/PID control/parameter tuning分类
信息技术与安全科学
