TY - GEN
T1 - Virtual Negative Cable Resistance for Power Sharing Accuracy Enhancement in DC Microgrids
AU - Li, Fulong
AU - Lin, Zhengyu
AU - Wu, Jiande
AU - Li, Wuhua
N1 - Funding: U.K. EPSRC UKRI Innovation Fellowship scheme under grant No. EP/S001662/1, and the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 734796.
PY - 2019/6/1
Y1 - 2019/6/1
N2 - This paper proposed a secondary control method for power sharing accuracy enhancement and bus voltage restoration in DC microgrids. Droop control is notorious for its low power sharing accuracy when the cable resistance is considered. The virtual negative cable resistance (VNCR) concept is proposed compensate the cable resistance, therefore, it no longer has negative impact on the power sharing accuracy. The VNCR controller needs to monitor the DC bus voltage through low bandwidth communications. As the byproduct, the DC bus voltage restoration can be achieved simultaneously. The control signals are processed through low-pass filters, so the secondary control layer can be decoupled from the primary current/voltage controls over high frequency dynamics. Finally, the proposed VNCR method is validated through MATLAB simulation.
AB - This paper proposed a secondary control method for power sharing accuracy enhancement and bus voltage restoration in DC microgrids. Droop control is notorious for its low power sharing accuracy when the cable resistance is considered. The virtual negative cable resistance (VNCR) concept is proposed compensate the cable resistance, therefore, it no longer has negative impact on the power sharing accuracy. The VNCR controller needs to monitor the DC bus voltage through low bandwidth communications. As the byproduct, the DC bus voltage restoration can be achieved simultaneously. The control signals are processed through low-pass filters, so the secondary control layer can be decoupled from the primary current/voltage controls over high frequency dynamics. Finally, the proposed VNCR method is validated through MATLAB simulation.
KW - DC microgrids
KW - bus voltage restoration
KW - current sharing accuracy
KW - droop control
KW - low pass filter
UR - https://ieeexplore.ieee.org/document/8781426/
UR - http://www.scopus.com/inward/record.url?scp=85070571573&partnerID=8YFLogxK
U2 - 10.1109/ISIE.2019.8781426
DO - 10.1109/ISIE.2019.8781426
M3 - Conference publication
SN - 978-1-7281-3667-7
VL - 2019-June
T3 - 2019 IEEE 28th International Symposium on Industrial Electronics (ISIE)
SP - 2539
EP - 2544
BT - Proceedings - 2019 IEEE 28th International Symposium on Industrial Electronics, ISIE 2019
PB - IEEE
T2 - 2019 IEEE 28th International Symposium on Industrial Electronics (ISIE)
Y2 - 12 June 2019 through 14 June 2019
ER -