TY - JOUR
T1 - Distributed Power Sharing Control Based on Adaptive Virtual Impedance in Seaport Microgrids with Cold Ironing
AU - Zhao, Peng
AU - Ma, Kai
AU - Yang, Jie
AU - Yang, Bo
AU - Guerrero, Josep M.
AU - Dou, Chunxia
AU - Guan, Xinping
N1 - Publisher Copyright:
IEEE
PY - 2023/6/1
Y1 - 2023/6/1
N2 - In a seaport microgrid (SMG), power sharing among distributed generation (DG) units is hindered by power coupling, line changes, and frequent power fluctuations caused by ship charging and discharging through cold ironing, which, in turn, threatens system stability and inverter security. This article proposes a delay-tolerant distributed adaptive virtual impedance control strategy for assigned active and reactive power sharing, so as to suppress the circulating current among DGs. First, the nonlinear impedance-power droop equations (IPDEs) are derived to actively update the resistive and inductive components of virtual impedance, which can accommodate changes in line structure and output power. Second, by means of low-bandwidth communication with quantized data and time delay, the desired power terms derived from practical consensus protocols are fed into the IPDEs, for which the proposed scheme gives a quantitative maximum tolerable communication delay with respect to power sharing accuracy. Third, considering the voltage drop caused by virtual impedance, inspired by traditional synchronous generators, we design a virtual impedance loop based on virtual damping and inertia to preserve voltage dynamics. Finally, an SMG containing four DG units is simulated to verify the effectiveness of the proposed strategy on both active and reactive power sharing.
AB - In a seaport microgrid (SMG), power sharing among distributed generation (DG) units is hindered by power coupling, line changes, and frequent power fluctuations caused by ship charging and discharging through cold ironing, which, in turn, threatens system stability and inverter security. This article proposes a delay-tolerant distributed adaptive virtual impedance control strategy for assigned active and reactive power sharing, so as to suppress the circulating current among DGs. First, the nonlinear impedance-power droop equations (IPDEs) are derived to actively update the resistive and inductive components of virtual impedance, which can accommodate changes in line structure and output power. Second, by means of low-bandwidth communication with quantized data and time delay, the desired power terms derived from practical consensus protocols are fed into the IPDEs, for which the proposed scheme gives a quantitative maximum tolerable communication delay with respect to power sharing accuracy. Third, considering the voltage drop caused by virtual impedance, inspired by traditional synchronous generators, we design a virtual impedance loop based on virtual damping and inertia to preserve voltage dynamics. Finally, an SMG containing four DG units is simulated to verify the effectiveness of the proposed strategy on both active and reactive power sharing.
KW - Complex impedance
KW - Delays
KW - Impedance
KW - Marine vehicles
KW - Microgrids
KW - power sharing
KW - Power system stability
KW - Seaports
KW - tolerable delay
KW - virtual damping
KW - virtual impedance
KW - Voltage control
UR - http://www.scopus.com/inward/record.url?scp=85139401082&partnerID=8YFLogxK
U2 - 10.1109/TTE.2022.3211204
DO - 10.1109/TTE.2022.3211204
M3 - Journal article
AN - SCOPUS:85139401082
SN - 2332-7782
VL - 9
SP - 2472
EP - 2485
JO - IEEE Transactions on Transportation Electrification
JF - IEEE Transactions on Transportation Electrification
IS - 2
M1 - 9906107
ER -