静止同步补偿器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静止同步补偿器 (STATCOM)的数学建模和控制器设计。在装置级层次 ,考虑到关键模型参数——等值电阻未知且系统受不可测量噪声干扰等实际情况 ,提出一种鲁棒型直接自适应控制算法 ,以解决无功电流的追踪控制问题 ;通过构造L yapunov函数并应用相关的稳定性理论严格证明了控制系统的全局稳定性和有界性 ;讨论了控制器设计参数的选择和数字实现问题。数字仿真结果表明 ,所得到的鲁棒自适应无功电流控制器能很好地达到预期控制目标 ,并在追踪能力和鲁棒特性等方面比比例积分 (PI)控制优越

Robust adaptive control of STATCOM's reactive current

The mathematical model and control design for a voltage sourced STATCOM (static synchronous compensator) are discussed on the three levels of circuit, device and system. A robust direct adaptive control scheme is proposed at the device level to solve the problem of STATCOM's reactive current tracking the reference input without knowing the critical parameter, the equivalent resistance in the noise environment. Lyapunov function and related stability theory are employed to give a rigid proof of the global stability and boundedness of the controlled system. Parameter selection and digital implementation for the proposed controller are also discussed. Digital simulation validates the effectiveness of the proposed control scheme and its obvious advantage over proportional integral (PI) controller in tracking control performance and robustness against unmodeled uncertainties and measurement noise.