TY - JOUR
T1 - Dynamic Equivalent Modeling for Multi-Microgrid Based on Structure Preservation Method
AU - Shuai, Zhikang
AU - Peng, Yelun
AU - Liu, Xuan
AU - Li, Zuyi
AU - Guerrero, Josep M.
AU - Shen, Z. John
PY - 2019/7
Y1 - 2019/7
N2 - As an increasing number of distributed energy resources (DERs) are integrated in the multi-microgrid (MMG) to meet load demand, the accurate model of MMG becomes high-order and unsuitable for online transient analysis. To address this issue, a dynamic equivalent modeling method for the inverter-based MMG is presented. When focusing on the dynamic behaviors of DERs within a microgrid (MG), the external MGs do not need to be modeled in detail and can be replaced by dynamic equivalent models. At first, the detailed model of a 3-MG system with droop-controlled DERs and PQ-controlled DERs is built as an example to show the equivalent modeling procedure. Subsequently, the developed 3-MG system is partitioned into a study MG and two external MGs. The study MG of the MMG retains its accurate form, while the external MGs will be replaced by the dynamic equivalent models whose model orders are much lower than that of the original one. The proposed procedure is based on the structure preservation method without the time-consuming iterative calculation. Finally, the validation range of the proposed method is verified with different models using the numerical simulation and eigenvalue analysis.
AB - As an increasing number of distributed energy resources (DERs) are integrated in the multi-microgrid (MMG) to meet load demand, the accurate model of MMG becomes high-order and unsuitable for online transient analysis. To address this issue, a dynamic equivalent modeling method for the inverter-based MMG is presented. When focusing on the dynamic behaviors of DERs within a microgrid (MG), the external MGs do not need to be modeled in detail and can be replaced by dynamic equivalent models. At first, the detailed model of a 3-MG system with droop-controlled DERs and PQ-controlled DERs is built as an example to show the equivalent modeling procedure. Subsequently, the developed 3-MG system is partitioned into a study MG and two external MGs. The study MG of the MMG retains its accurate form, while the external MGs will be replaced by the dynamic equivalent models whose model orders are much lower than that of the original one. The proposed procedure is based on the structure preservation method without the time-consuming iterative calculation. Finally, the validation range of the proposed method is verified with different models using the numerical simulation and eigenvalue analysis.
KW - Dynamic equivalent model
KW - Inverter-based microgrid
KW - Reduced-order modeling.
UR - http://www.scopus.com/inward/record.url?scp=85047984932&partnerID=8YFLogxK
U2 - 10.1109/TSG.2018.2844107
DO - 10.1109/TSG.2018.2844107
M3 - Journal article
AN - SCOPUS:85047984932
SN - 1949-3053
VL - 10
SP - 3929
EP - 3942
JO - IEEE Transactions on Smart Grid
JF - IEEE Transactions on Smart Grid
IS - 4
M1 - 8371621
ER -