| 引用本文: | 霍群海,孔力,韦统振.2种改进的滑模并网逆变器控制策略[J].电力自动化设备,2009,(4): |
| .Two modified grid-connected inverter control strategies based on sliding mode variable structure[J].Electric Power Automation Equipment,2009,(4): |
|
|
| 摘要: |
| 为改善光伏并网逆变器控制系统的动态性能,根据并网逆变器数学模型,提出利用指数滑模变结构控制律和平方根滑模控制律,设计基于改进滑模变结构的单相电流环光伏并网逆变器控制系统.推导了滑模变结构控制在并网逆变器应用的滑模面存在性,并利用李亚普诺夫定理证明了系统稳定性.针对所选滑模控制律存在的非线性可能引起系统抖振的问题,采用单位控制连续化方法,使改进后的控制算法在切换面附近具有高增益特性,使系统具有抵抗干扰和参数摄动的能力.最后对2种控制方法进行了比较,证明改进的指数滑模变结构有更精准的跟随特性. |
| 关键词: 光伏并网逆变器控制 指数滑模 平方根滑模 变结构 系统抖振 |
| DOI： |
| 分类号:TM464 |
| 基金项目:国家高新技术研究发展项目，国家自然科学基金? |
|
| Two modified grid-connected inverter control strategies based on sliding mode variable structure |
|
HUO Qunhai KONG Li WEI Tongzhen
|
| Abstract: |
| According to the mathematical model of grid-connected inverter,the exponential sliding mode control law and square root sliding mode control law are used to improve the dynamic performance of grid-connected PV inverter control system,and a grid-connected PV inverter control system with single-phase current loop is designed based on modified sliding mode variable structure.The existence of sliding surface in the variable structure control of grid-connected inverter is deduced,and the system stability is prov... |
| Key words: grid-connected PV inverter control exponential sliding mode square root sliding mode variable structure system buffeting |
