基于输出反馈控制理论的HVDC附加次同步阻尼控制器

通过在直流输电系统的整流站装设附加次同步阻尼控制器可以削弱交直流并联输电系统中发生的次同步振荡。利用输出反馈线性最优控制理论设计附加次同步阻尼控制器,选取与控制器密切相关的反馈信号Δω5、ΔαR,求解有约束条件的Levine-Athans方程,得出附加控制器的输出反馈增量。特征值分析和时域仿真结果表明:所设计的附加次同步阻尼控制器在很宽的串联补偿条件下能有效地抑制交直流并联输电系统中发生的次同步振荡。

Design of Supplemental Subsynchronous Oscillation Damping Controller Based on Output Feedback Control Theory of HVDC System

For AC/DC hybrid system, the subsynchronous oscillation can be damped by adding supplemental subsynchronous damping controller (SSDC) in converting station. A S SDC for HVDC system is designed with using output feedback linear optimal contro l theory. Meantime, the feedback signals which are closely related to the contro ller is selected, the Levine-Athans equations which are of a constrain conditio n is solved, the output feedback increment of SSDC is educed. The results of eig envalue analysis and time domain simulation using nonlinear system model show that the designed damping controller can effectively damp the subsynchronous osc illation of AC/DC transmission system under a scope of wider series compensation .