TY - JOUR
T1 - Lifetime-Oriented Droop Control Strategy for AC Islanded Microgrids
AU - Wang, Yanbo
AU - Liu, Dong
AU - Liu, Ping
AU - Deng, Fujin
AU - Zhou, Dao
AU - Chen, Zhe
PY - 2019/5/1
Y1 - 2019/5/1
N2 - This paper presents a lifetime-oriented droop control strategy for ac islanded microgrids, which is able to perform equal thermal sharing among paralleled inverters. Electro-thermal model and temperature estimation model are first established to estimate thermal characteristics of inverters, and temperature-power droop relationships are built according to the electro-thermal model. Then, a lifetime-oriented droop controller is developed to realize equal thermal stress sharing. In addition, a small-signal model of microgrid equipped with the proposed droop control is established, and the effect of electro-thermal parameters of the power devices on the closed-loop stability of a droop controller is investigated. Simulation and experimental results show that the proposed lifetime-oriented droop control is able to perform identical thermal stress sharing among paralleled inverters automatically, which mitigates the impact of thermal stresses on average lifetime of inverters and thus enhances long-term reliability of microgrids.
AB - This paper presents a lifetime-oriented droop control strategy for ac islanded microgrids, which is able to perform equal thermal sharing among paralleled inverters. Electro-thermal model and temperature estimation model are first established to estimate thermal characteristics of inverters, and temperature-power droop relationships are built according to the electro-thermal model. Then, a lifetime-oriented droop controller is developed to realize equal thermal stress sharing. In addition, a small-signal model of microgrid equipped with the proposed droop control is established, and the effect of electro-thermal parameters of the power devices on the closed-loop stability of a droop controller is investigated. Simulation and experimental results show that the proposed lifetime-oriented droop control is able to perform identical thermal stress sharing among paralleled inverters automatically, which mitigates the impact of thermal stresses on average lifetime of inverters and thus enhances long-term reliability of microgrids.
KW - Droop control
KW - Lifetime
KW - Paralleled inverters
KW - Thermal sharing
KW - AC islanded microgrid
KW - paralleled inverters
KW - droop control
KW - lifetime
KW - thermal sharing
UR - http://www.scopus.com/inward/record.url?scp=85064995820&partnerID=8YFLogxK
U2 - 10.1109/TIA.2019.2898847
DO - 10.1109/TIA.2019.2898847
M3 - Journal article
SN - 0093-9994
VL - 55
SP - 3252
EP - 3263
JO - I E E E Transactions on Industry Applications
JF - I E E E Transactions on Industry Applications
IS - 3
M1 - 8638986
ER -