基于改进无源-滑模的MMC抗扰动控制策略研究
Research on MMC Anti-Disturbance Control Strategy Based on the Improved Passive-Sliding Mode Control
王佚安 1徐建源 1闫征1
作者信息
- 1. 沈阳工业大学 电气工程学院,辽宁 沈阳 110870
- 折叠
摘要
传统的PI控制、无源控制因其内部控制结构参数固定,在系统遇到扰动时,同一组参数无法同时保证系统在多种扰动下的响应速度及控制效果.在模块化多电平换流器(MMC)欧拉-拉格朗日模型的基础上引入滑模控制,解决无源控制内部参数固定的问题,提升系统的抗扰动运行能力,并在原有的趋近律上进行优化,降低滑模控制自身存在的抖振,使系统有更好的动态特性.在MATLAB/Simulink平台中搭建MMC仿真模型进行仿真,分别对应用PI控制、无源-滑模控制、改进无源-滑模控制的电流内环进行对比分析,验证了改进无源-滑模控制在相同的仿真条件下具有更强的抗扰动性,响应速度更快,并且在滑模控制的基础上改进趋近律后,有效降低了滑模控制自身存在的抖振问题.
Abstract
The traditional PI control and passive control have fixed internal control structure parameters,so when the system encounters disturbances,the same group of parameters cannot ensure the response speed and control results under multiple disturbances at the same time.First,the paper introduces the sliding mode control on the basis of MMC's Euler-Lagrange model to solve the problem of fixed internal parameters of passive control to improve the anti-disturbance operation ability of the system.Then,the original approaching law is optimized to reduce the vibration of the sliding mode control itself to keep the system having better dynamic characteristics.After building a MMC sim-ulation model in the MATLAB/Simulink platform,the inner current loop applied with PI control,passive-sliding mode control and improved passive-sliding mode control respectively are compared.It verifies that the improved passive-sliding mode control has stronger anti-distur-bance and faster response speed under the same simulation conditions.Moreover,as the approaching law is improved based on the sliding control,the vibration problem of sliding mode control itself is effectively reduced.
关键词
模块化多电平换流器/三相不平衡/无源-滑模控制/趋近律Key words
modular multilevel converter/three-phase unbalance/passive-sliding mode control/approaching law引用本文复制引用
出版年
2023
NETL
NSTL
维普
万方数据