超导磁储能系统自抗扰控制策略研究

本文针对电压源型换流器(voltage source converter, VSC)的超导磁储能(superconducting magnetic energy storage, SMES)系统，设计了一款自抗扰控制(active disturbance rejection control, ADRC)。首先，分别建立了SMES的交流侧VSC、直流侧斩波器数学模型；其次，基于非线性扩张状态观测器和线性误差反馈律设计了SMES的交、直流侧ADRC；然后，通过描述函数法分析了ADRC的稳定性；最后，在MATLAB/Simulink平台中搭建了仿真模型。仿真结果表明，与传统PI控制相比，ADRC具有更好的动态响应性能和抗扰动特性，并针对系统参数的不确定性具有更好的鲁棒性，有效地提高了SMES的运行可靠性。

Research on Active Disturbance Rejection Control Strategy for Superconducting Magnetic Energy Storage System

This paper aims to design an active disturbance rejection control (ADRC) strategy for voltage source converter (VSC) based superconducting magnetic energy storage (SMES) systems. First, the mathematical models of AC-side VSC and DC-side chopper of SMES are established respectively. Secondly, based on the analyzing of nonlinear extended state observer and linear state error feedback, the ADRCs are designed for the AC-side VSC and DC-side chopper of SMES. Then, the stability of the proposed nonlinear ADRCs is analyzed by the describing function method. Finally, the simulation model is constructed in the MATLAB/Simulink platform. The simulation results show that the proposed ADRCs have better dynamic response performance and anti-disturbance characteristics, and present a better robustness to parameter uncertainty compared with the traditional PI method, which effectively improve the operational reliability of SMES.