Comparison of LTI and LTP models for stability analysis of grid converters
Comparison of LTI and LTP models for stability analysis of grid converters
复制标题
电网变流器稳定性分析的 LTI 和 LTP 模型比较
DOI：
10.1109/compel.2016.7556769
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
C. Bak
中科院分区：
文献类型：
--
作者：
J. Kwon;Xiongfei Wang;F. Blaabjerg;C. Bak
The stability analysis of grid-connected converters have attracted increasing attentions, due to the oscillations arising in wind power plants, micro-grids, and other emerging power electronics based power systems. The modeling tool of converters thus becomes essential to faithfully reveal oscillations without any hidden regions. This paper presents a detailed comparison of two linearized modeling methods, which are, respectively, developed in the Linear Time-Invariant (LTI) and the Linear Time-Periodic (LTP) frameworks. The LTP model can consider the effect of frequency-coupling dynamics, which are occurred by the time-varying behavior, while the conventional LTI model can not capture this behavior. The advantages and limits of two models are then illustrated with examples. The compared results are verified in the frequency domain and time domain as well.
