TY - GEN
T1 - Stability of Interacting Grid-Connected Power Converters
AU - Wan, Cheng
AU - Huang, Meng
AU - Tse, Chi K.
AU - Ruan, Xinbo
PY - 2014/6
Y1 - 2014/6
N2 - The power grid in a typical micro distribution system is non-ideal, presenting itself as a voltage source with significant impedance. Thus, grid-connected converters interact with each other via the the non-ideal grid. In this study, we consider the practical scenario of voltage-source converters connected to a three-phase voltage source with significant impedance. We show that stability can be compromised in the interacting converters. Specifically, the stable operating regions in selected parameter space may be reduced when grid-connected converters interact under certain conditions. In this paper, we develop bifurcation boundaries in the parameter space with respect to Hopf-type instability. A small-signal model in the dq-frame is adopted to analyze the system using an impedance-based approach. Moreover, results are presented in design-oriented forms so as to facilitate the identification of variation trends of the parameter ranges that guarantee stable operation. © 2014 IEEE.
AB - The power grid in a typical micro distribution system is non-ideal, presenting itself as a voltage source with significant impedance. Thus, grid-connected converters interact with each other via the the non-ideal grid. In this study, we consider the practical scenario of voltage-source converters connected to a three-phase voltage source with significant impedance. We show that stability can be compromised in the interacting converters. Specifically, the stable operating regions in selected parameter space may be reduced when grid-connected converters interact under certain conditions. In this paper, we develop bifurcation boundaries in the parameter space with respect to Hopf-type instability. A small-signal model in the dq-frame is adopted to analyze the system using an impedance-based approach. Moreover, results are presented in design-oriented forms so as to facilitate the identification of variation trends of the parameter ranges that guarantee stable operation. © 2014 IEEE.
UR - http://www.scopus.com/inward/record.url?scp=84907414491&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84907414491&origin=recordpage
U2 - 10.1109/ISCAS.2014.6865722
DO - 10.1109/ISCAS.2014.6865722
M3 - RGC 32 - Refereed conference paper (with host publication)
SN - 9781479934324
T3 - Proceedings - IEEE International Symposium on Circuits and Systems
SP - 2668
EP - 2671
BT - 2014 IEEE International Symposium on Circuits and Systems (ISCAS)
PB - IEEE
T2 - 2014 IEEE International Symposium on Circuits and Systems (ISCAS 2014)
Y2 - 1 June 2014 through 5 June 2014
ER -