Observer-Based State-Space Current Control for a Three-Phase Grid-Connected Converter Equipped With an LCL Filter
Observer-Based State-Space Current Control for a Three-Phase Grid-Connected Converter Equipped With an LCL Filter
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DOI：
10.1109/tia.2013.2295461
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发表时间：
2014-07
影响因子：
4.4
通讯作者：
Jarno Kukkola;M. Hinkkanen
中科院分区：
文献类型：
--
作者：
Jarno Kukkola;M. Hinkkanen
本文提出了一种状态空间电流控制方法，用于主动阻尼LCL滤波器的谐振频率，并通过直接插极来设定变换器电流的主导动态。使用状态观测器，与传统的L滤波器设计相比，不需要额外的传感器。考虑了系统延迟与谐振现象引起的不稳定性之间的关系。用奈奎斯特图来检验所提方法的参数灵敏度。仿真和实验验证了该方法的有效性。
This paper presents a state-space current control method for active damping of the resonance frequency of the LCL filter and setting the dominant dynamics of the converter current through direct pole placement. A state observer is used, where upon additional sensors are not needed in comparison with the conventional L filter design. The relationship between the system delay and instability caused by the resonance phenomenon is considered. Nyquist diagrams are used to examine the parameter sensitivity of the proposed method. The method is validated with simulations and experiments.