基于扩张状态观测器的电力系统非线性鲁棒协调控制

该文提出了一种基于扩张状态观测器的非线性鲁棒协调控制方法(Extended-State-Observer based Nonlinear Robust Coordinated Control，ENRCC）；将电力系统对象归纳为一类内环为非线性系统、外环为伪线性系统的多输入多输出对象。在此基础上，完整地阐述了ENRCC的控制原理；利用一簇低阶扩张状态观测器对内环非线性系统进行动态反馈线性化和解耦设计，利用线性鲁棒控制方法对已线性化的内环系统和外环伪线性系统进行预期动力学设计，最终可实现观测器 线性化 鲁棒协调控制三者的有机结合。实例仿真结果表明：该控制规律严谨简单，方法原理直观清晰，便于工程应用，具有很强的适应性和鲁棒性，能有效地解决一类不确定 非线性 分散性的电力系统多输入多输出(MIMO)对象的控制问题。

EXTENDED STATE OBSERVER BASED NONLINEAR ROBUST COORDINATED CONTROL OF POWER SYSTEMS

In the paper, a novel extended state observer (ESO) based nonlinear robust coordinated control method (ENRCC) is proposed. The core idea of ENRCC is to pursue the perfect combination of state observer, feedback linearization and robust coordinated control, and so to solve a class of controller design problems of nonlinearity, uncertainty and decentralization. According to the symmetrical study on power system plants, a class of nonlinear MIMO plants composed of nonlinear internal- loop system and pseudo-linear external-loop system is generalized. On the basis of this mathematical model, the main methodology of ENRCC is explicated that by using ESO, the dynamic feedback linearization of nonlinear internal-loop system can be implemented; by employing the Linear Robust Control Theory, the anticipating dynamic characteristic design of the linearized internal-loop system and pseudo-linear external-loop system can be fulfilled. The simulation results for real power systems show that the control law of the method is precise and simple, the principle of the method is direct and clear. It can be easily used for engineering usages with strong adaptability and robustness.