TY - GEN
T1 - Parallel operation of a synchronous generator and a virtual synchronous generator under unbalanced loading condition in microgrids
AU - Liu, Jia
AU - Yushi, Miura
AU - Ise, Toshifumi
AU - Yoshizawa, Jin
AU - Watanabe, Kenichi
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2016/7/13
Y1 - 2016/7/13
N2 - Parallel operation of a synchronous generator (SG) and an inverter-interfaced distributed generator (DG) is required in some islanded microgrids. However, dynamic performance of a small SG is usually poor, i.e. the rotor speed usually deviates largely during a loading transition, due to small inertia and slow governor response. Moreover, unbalanced SG current should be prevented to protect the SG, which makes this issue more challenging. In this paper, a control method for the inverter-interfaced DG based on virtual synchronous generator (VSG) concept is proposed, to improve the overall performance of parallel operation of SG and DG. Double decoupled synchronous reference frame (DDSRF) decomposition, SG negative-sequence current compensation, modified calculation methods for power and voltage, and transient virtual stator impedance are integrated into the proposed VSG control scheme, and tuning methods of main control parameters are discussed. It is demonstrated by simulation results that the proposed DG control method alleviates the SG rotor speed deviation and DG overcurrent during a loading transition, and eliminates the negative-sequence components of the SG output current.
AB - Parallel operation of a synchronous generator (SG) and an inverter-interfaced distributed generator (DG) is required in some islanded microgrids. However, dynamic performance of a small SG is usually poor, i.e. the rotor speed usually deviates largely during a loading transition, due to small inertia and slow governor response. Moreover, unbalanced SG current should be prevented to protect the SG, which makes this issue more challenging. In this paper, a control method for the inverter-interfaced DG based on virtual synchronous generator (VSG) concept is proposed, to improve the overall performance of parallel operation of SG and DG. Double decoupled synchronous reference frame (DDSRF) decomposition, SG negative-sequence current compensation, modified calculation methods for power and voltage, and transient virtual stator impedance are integrated into the proposed VSG control scheme, and tuning methods of main control parameters are discussed. It is demonstrated by simulation results that the proposed DG control method alleviates the SG rotor speed deviation and DG overcurrent during a loading transition, and eliminates the negative-sequence components of the SG output current.
KW - distributed power generation
KW - synchronous generator
KW - unbalanced loading
KW - virtual synchronous generator
UR - https://www.scopus.com/pages/publications/84983372281
U2 - 10.1109/IPEMC.2016.7512894
DO - 10.1109/IPEMC.2016.7512894
M3 - 会议稿件
AN - SCOPUS:84983372281
T3 - 2016 IEEE 8th International Power Electronics and Motion Control Conference, IPEMC-ECCE Asia 2016
SP - 3741
EP - 3748
BT - 2016 IEEE 8th International Power Electronics and Motion Control Conference, IPEMC-ECCE Asia 2016
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 8th IEEE International Power Electronics and Motion Control Conference, IPEMC-ECCE Asia 2016
Y2 - 22 May 2016 through 26 May 2016
ER -