.png){kind=icon}
返回
Finite-Difference-Impedance Method for Time-Delay Systems
.png){kind=icon}
PRE
AI
DOI：10.1109/ACCESS.2022.3211951.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
The stability issues assessment by the impedance-based method demands the computation of accurate small-signal models. However, obtaining impedance models can be a time-consuming task if analytical models or the perturbation-based method are used. Especially in large-scale, poorly damped, distributed, and frequency-dependent parameter systems. A third approach, which has been less explored, is based on numerical derivative approximations, rather than analytical equations or time-domain simulations. This approach works with large-scale systems, avoiding tedious mathematical expressions and large recursive time-domain simulations. As a step-forward in this approach, this paper proposes a numerical-oriented method, based on the finite-difference method, to compute impedance models of time-delay power-electronics-based power systems. An outstanding feature of the proposal is the capability to incorporate the exact delays into the numerical models of impedance without resorting to approximations nor increasing the size of the system model. We compare the proposed method with the analytical and perturbation methods using a grid-connected microgrid with two power electronic inverters as a test system. The results confirm the correct performance of the proposal.
Keyword:
Impedance
Computational modeling
Numerical models
Delays
Mathematical models
Analytical models
Numerical stability
Finite difference methods
Impedance-based method
small-signal stability
VSC-based systems
time-delay
期刊
IF:
3.6
论文数:
9.8W
被引数:
29.4W
机构
引用论文
.png){kind=icon}
Frequency Domain Methods for Accuracy Assessment of Wideband Models in Electromagnetic Transient Stability Studies电磁暂态稳定研究中宽带模型精度评估的频域方法
OAAI
OAAI分享收藏An Online Event-Based Grid Impedance Estimation Technique Using Grid-Connected Inverters使用并网逆变器的基于事件的在线电网阻抗估计技术OAAI
OAAI分享收藏Sequence Impedance Modeling and Stability Comparative Analysis of Voltage-Controlled VSGs and Current-Controlled VSGs电压控制VSGs和电流控制VSGs的序列阻抗建模和稳定性比较分析
PREAI
分享收藏
查看更多内容