STATCOM的线性化建模及矩阵控制策略研究

Linear Mathematical Model and Matrix Control Strategy of STATCOM

应用最优线性化的方法对STATCOM的非线性标幺化数学模型进行线性化。依据线性化数学模型所揭示的STATCOM多输入输出(MIMO)系统的特点,推导出一种矩阵形式的控制策略,并且应用LQR(linear quadratic regulator)法对控制参数进行最优化设计。这种控制策略最大的特点是将相互耦合的控制参数作为一个整体进行计算整定,从而解决了在STATCOM的传统控制策略中相互耦合的控制参数整定较困难的问题。应用MATLAB软件进行仿真验证,结果证明了STATCOM线性化数学模型的准确性和矩阵形式控制策略的有效性。

The optimal linearization was introduced to linearize STATCOM per-unit nonlinear mathematical model. The matrix control strategy was proposed based on STATCOM linear mathematical model which indicates STATCOM is a multi-variable input-output（MIMO） system. LQR（linear quadratic regulator） was used to optimize control parameters of STATCOM. The coupled control parameters of STATCOM were tuned as a whole when matrix control strategy was adopted, which overcame the problem of the couple control parameters tuning difficult when traditional control strategy was adopted. The simulation results by MATLAB illustrate the accuracy of the STATCOM linear mathematical model and validity of the matrix control strategy.