STATCOM无功电流的鲁棒自适应控制

从器件级、装置级和系统级3个层次讨论电压源型STATCOM的数学建模和控制器设计；提出了一种鲁棒型直接自适应控制算法，以解决STATCOM模型参数未知情况下无功电流的追踪控制问题。在对象系统严格正实性得以验证的基础上，系统地选择了控制器设计参数，并考虑了输入输出噪声对控制系统的影响，从而使控制器具有较好的鲁棒性。数字仿真结果表明，得到的控制器在追踪控制能力和鲁棒特性等方面比PI控制优越。

ROBUST ADAPTIVE CONTROL OF STATCOM

Mathematical model and control design for voltage-sourced STATCOM is discussed on three levels of circuit, device and system. A robust direct adaptive control scheme is proposed at device level to attack the problem of tracking the reference input without knowing the critical parameter-equivalent resistance. Strictly positive realness of the original system is evaluated and parameters for control designing are systematically selected. Input/output disturbances are taken into account to achieve robust control. Digital simulation validates the effectiveness of the proposed control scheme and its obvious advantage over PI controller in tracking control performance and robustness to unmodeled uncertainties and measurement noises.