基于超导储能的暂态稳定控制器设计

设计了用于提高电力系统的暂态稳定超导储能(SMES)装置的非线性鲁棒控制器，并从数字仿真和动模实验两方面进行了验证。为了简化动态性能分析和控制器设计，在实验样机的基础上，提出了新的基于电流型变流器的SMES的动态模型，并将其转化为标幺制模型。通过外部干扰的引入，得到了装设SMES的单机无穷大系统的动态模型，并采用精确线性化方法和线性H∞控制理论设计了SMES的非线性鲁棒控制器。为了验证该控制器的效果，对装设SMES单机无穷大系统进行了数字仿真和动模实验，并将其与常规PI控制器进行了比较。仿真和实验结果都证明了非线性鲁棒控制器具有良好性能。

NONLINEAR ROBUST CONTROL OF SMES TO IMPROVE THE TRANSIENT STABILITY OF POWER SYSTEMS

This paper proposes a new approach and corresponding experiments for the nonlinear robust control of superconducting magnetic energy storage (SMES) to improve the transient stability of power systems. Based on the results of the SMES prototype experiments, a new dynamic model with disturbances of SMES is adopted, and transferred to a p. u. System for simplifying the dynamic analysis and controller design. The feedback linearization scheme and linear control theory are applied to design a novel SMES nonlinear robust controller in an one-machine infinite bus (OMIB) power system. In order to validate such positive effects of the proposed control strategy, experiments are performed on a laboratory setup of SMES. The results of experiments demonstrate that the proposed nonlinear robust controller has better performances to improve the transient stability of power systems than that of conventional PI controllers.