摘要
由于超导磁储能系统(SMES)的非线性特性,精准的控制策略是SMES实际应用的基础。文中提出了一种基于新型非线性鲁棒控制的SMES功率控制策略。建立了电压源型SMES的交流侧变流器以及直流斩波器两部分的数学模型。根据反馈线性化原理,设计了SMES基于输入/输出反馈线性化控制策略。仿真结果表明,基于输入/输出反馈线性化控制的SMES对功率指令具有优秀的跟踪能力,同时能够快速稳定直流侧电压。与SMES的经典PI控制策略进行对比分析,所提出的控制策略具有更好的鲁棒性和快速收敛性。
Precise control strategies are the basis of the practical application of superconducting magnetic energy storage system( SMES),which has non-linear dynamic characteristic. In this paper,a novel power control strategy of SMES based on nonlinear control is proposed. Mathematic models of SMES consisted of VSC and chopper are established. According to the principle of feedback linearization,the input/output feedback linearization control strategy of SMES is designed. The simulation results show that the SMES based on the proposed input/output feedback linearization control has good tracking ability for power instructions and it can quickly stabilize the DC-side voltage of the converter. Simulation results also indicate the validity of the input/output feedback linearization control strategy and it has better robustness and high-speed convergence than the typical PI closed-loop control strategy.
引文
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