三电平直流变流器的参数自适应非线性控制

发布时间：2018-02-28 18:26

本文关键词： 变流器三电平中频非线性控制稳定性　出处：《电机与控制学报》2014年12期 　论文类型：期刊论文

【摘要】：为研究一种三电平中频链直流变流器的控制器,以内模状态变量作为反馈量,建立传统的电压电流双闭环PI稳压控制器。通过分析和试验表明,传统的固定参数PI控制器难以同时满足变流器不同模式下的动、静态性能。因此提出一种电压电流双闭环PI参数自适应非线性稳压控制策略,将系统分为动态、电流连续模式稳态和电流断续模式稳态等几种模态,不同状态之间切换时,按照相应的自适应变化规律,实时调整控制器的PI参数,以获取较优的输出特性。并且基于Lyapunov稳定性理论证明了该控制器的稳定性。最后,实验验证了控制器的良好动静态性能,动态最大电压跌落小于13%,稳态电压纹波小于4%。
[Abstract]:In order to study the controller of a three-level neutral-frequency link DC converter, the traditional voltage and current double closed loop Pi controller is established with the internal mode state variable as the feedback. The analysis and experiment show that, The traditional Pi controller with fixed parameters is difficult to satisfy the dynamic and static performance of the converter in different modes at the same time. Therefore, a voltage and current double closed loop Pi parameter adaptive nonlinear voltage stabilizing control strategy is proposed, which divides the system into dynamic. Several modes, such as current continuous mode steady state and current intermittent mode steady state, can adjust the Pi parameters of the controller in real time according to the corresponding law of adaptive variation when switching between different states. The stability of the controller is proved based on the Lyapunov stability theory. Finally, the experimental results show that the controller has good dynamic and static performance, the dynamic maximum voltage drop is less than 13 and the steady voltage ripple is less than 4.
【作者单位】：海军工程大学舰船综合电力技术国防科技重点实验室;
【基金】：国家重点基础研究发展计划项目(973项目)(2012CB215103) 新世纪优秀人才支持计划资助项目(No.NECT—11—0871)
【分类号】：TM46

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