基于偏差分离的同步发电机非线性励磁控制

Nonlinear Excitation Control Based on Deviation Separation for Synchronous Generator

为改善基于微分几何的非线性控制方法对模型和干扰不确定性的鲁棒性,在考虑干扰、系统模型及参数不确定性的前提下,提出了一种基于偏差分离的非线性控制策略,并给出了控制变量的构造方法和一般表达式,进而将其应用于同步发电机励磁控制。针对单机无穷大系统,利用所提出的控制策略设计了一种基于偏差分离的非线性励磁控制器,由PSCAD/EMTDC仿真得到的结果验证了所提方法的正确性和控制策略的有效性。

In order to boost the robustness of differential geometry based nonlinear control with model uncertainty and disturbance, a deviation separation based nonlinear control strategy is proposed to deal with the distubance and model/ parameter uncertainty. Moreover, the construction and general expressions for control variables are given. Based on the new method, a nonlinear excitation controller is designed for single machine infinite bus power systems. The simulation results, which are conducted by PSCAD/EMTDC, demonstrate that the approach proposed is correct and the control- ling strategy designed is effective.