一种新型的交直流输电系统控制器

A NEW CONTROLLER FOR AC/DC SYSTEMS

针对直流控制的特点和传统设计控制方法的缺陷,本文把直接大范围线性化控制理论引入到交直流混合系统,设计出了一种新型非线性直流控制器。 与现在流行的微分几何法对比,直接大范围线性化方法数学过程简单,物理概念简明,便于工程应用。 针对两机系统,我们对所设计的直流非线性控制器进行了数字仿真。仿真结果表明,所设计的直流控制器具有比较满意的特性。

The conventional design for HVDC systems controller is based on the model linearzating at operating points, so that the transient performance and robustness cannot be guaranteed. In this paper a new nonlinear control theory is introduced to integrated AC/DC system in this paper, and a new nonlinear controller for DC system is developed.Compaing with Differential Geometry theory, the method present in this paper is simpler in mathematical model, and more clear in phsical concepts, so that it is suitable for the application to the power system.Computer simulation has been made on a two-machine system. The result show that the behaviour of the controller is satisfactory.