TY - GEN
T1 - Modeling and analysis of droop based hybrid control strategy for parallel inverters in islanded microgrids
AU - Wang, Shike
AU - Liu, Zeng
AU - Liu, Jinjun
AU - Liu, Baojin
AU - Meng, Xin
AU - An, Ronghui
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/5/17
Y1 - 2017/5/17
N2 - The well-known active power-frequency and reactive power-voltage amplitude droop scheme is widely used in islanded microgrids to automatically share load power and regulate output voltage of parallel voltage-controlled inverters (VCIs) in microgrids. However, droop controlled VCIs tend to lose stability as droop slopes increasing. Meanwhile, parameter discrepancies extend synchronization time between VCIs which degrade system dynamic performance. In order to compensating above limitations of traditional method, this paper proposed a droop based hybrid control strategy by exploiting advantages from both voltage-controlled and current-controlled inverters. Capturing the detail of inner control loops, a small-signal state-space model is derived to analyze characteristics of the overall parallel system. Comparing to traditional method, eigenvalues of the hybrid control strategy indicate better stability and dynamic performance. In agreement with theoretical analysis, both simulation and experimental results are presented to validate the advantages of this proposed strategy.
AB - The well-known active power-frequency and reactive power-voltage amplitude droop scheme is widely used in islanded microgrids to automatically share load power and regulate output voltage of parallel voltage-controlled inverters (VCIs) in microgrids. However, droop controlled VCIs tend to lose stability as droop slopes increasing. Meanwhile, parameter discrepancies extend synchronization time between VCIs which degrade system dynamic performance. In order to compensating above limitations of traditional method, this paper proposed a droop based hybrid control strategy by exploiting advantages from both voltage-controlled and current-controlled inverters. Capturing the detail of inner control loops, a small-signal state-space model is derived to analyze characteristics of the overall parallel system. Comparing to traditional method, eigenvalues of the hybrid control strategy indicate better stability and dynamic performance. In agreement with theoretical analysis, both simulation and experimental results are presented to validate the advantages of this proposed strategy.
KW - Active and reactive power droops
KW - State-space model
KW - Voltage-controlled and current-controlled inverters
UR - https://www.scopus.com/pages/publications/85020002521
U2 - 10.1109/APEC.2017.7931194
DO - 10.1109/APEC.2017.7931194
M3 - 会议稿件
AN - SCOPUS:85020002521
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 3462
EP - 3469
BT - 2017 IEEE Applied Power Electronics Conference and Exposition, APEC 2017
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 32nd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2017
Y2 - 26 March 2017 through 30 March 2017
ER -