TY - JOUR
T1 - Stable current sharing and voltage balancing in DC microgrids
T2 - A consensus-based secondary control layer
AU - Tucci, Michele
AU - Meng, Lexuan
AU - Guerrero, Josep M.
AU - Ferrari-Trecate, Giancarlo
PY - 2018/9
Y1 - 2018/9
N2 - In this paper, we propose a secondary consensus-based control layer for current sharing and voltage bal-ancing in DC microGrids (mGs). To this purpose, we assume that Distributed Generation Units (DGUs) areequipped with decentralized primary controllers guaranteeing voltage stability. This goal can be achievedusing, for instance, Plug-and-Play (PnP) regulators, which allow one to analyze the behavior of the closed-loop mG by approximating local primary control loops with either unitary gains or first-order transferfunctions. Besides proving exponential stability, current sharing, and voltage balancing, we describe howto design secondary controllers in a PnP fashion when DGUs are added or removed. Theoretical results arecomplemented by simulations, using a 7-DGUs mG implemented in Simulink/PLECS, and experiments ona 3-DGUs mG.
AB - In this paper, we propose a secondary consensus-based control layer for current sharing and voltage bal-ancing in DC microGrids (mGs). To this purpose, we assume that Distributed Generation Units (DGUs) areequipped with decentralized primary controllers guaranteeing voltage stability. This goal can be achievedusing, for instance, Plug-and-Play (PnP) regulators, which allow one to analyze the behavior of the closed-loop mG by approximating local primary control loops with either unitary gains or first-order transferfunctions. Besides proving exponential stability, current sharing, and voltage balancing, we describe howto design secondary controllers in a PnP fashion when DGUs are added or removed. Theoretical results arecomplemented by simulations, using a 7-DGUs mG implemented in Simulink/PLECS, and experiments ona 3-DGUs mG.
KW - Consensus algorithms
KW - Current sharing
KW - DC microgrids
KW - Stability analysis
KW - Voltage balancing
UR - http://www.scopus.com/inward/record.url?scp=85047428049&partnerID=8YFLogxK
U2 - 10.1016/j.automatica.2018.04.017
DO - 10.1016/j.automatica.2018.04.017
M3 - Journal article
AN - SCOPUS:85047428049
SN - 0005-1098
VL - 95
SP - 1
EP - 13
JO - Automatica
JF - Automatica
ER -