TY - GEN
T1 - A Decentralized Coordinated Control Method for Power Management in DC Microgrids
AU - Zhao, Pu
AU - Liu, Zeng
AU - Liu, Jinjun
AU - Song, Ying
N1 - Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - In DC microgrids, the bus voltage is an important control signal for the existing power management strategies since it is a common signal for all distributed units, which, however, requires remote measurement and transmission. The most alternative implementation of using local terminal voltage for control instead of the bus voltage is not able to always ensure all the distributed units in the system operate in the appropriate operating mode when considering line resistances. Focusing on the challenge, a small-AC-signal (SACS)-injection-based coordinated control method is proposed in this paper, where an estimated bus voltage that is extremely close to the actual bus voltage is used as the control signal. Each distributed unit estimates the bus voltage utilizing local voltage and current information as well as a roughly estimated line resistance, and the difference among the estimations are always suppressed to zero based on the injected SACS. Firstly, the proposed coordinated control method is explained in detail. Then, the comprehensive design procedure for control parameters is provided via steady state and dynamic analysis of the system. Finally, simulation and experiment results demonstrate the effectiveness of the proposed control method.
AB - In DC microgrids, the bus voltage is an important control signal for the existing power management strategies since it is a common signal for all distributed units, which, however, requires remote measurement and transmission. The most alternative implementation of using local terminal voltage for control instead of the bus voltage is not able to always ensure all the distributed units in the system operate in the appropriate operating mode when considering line resistances. Focusing on the challenge, a small-AC-signal (SACS)-injection-based coordinated control method is proposed in this paper, where an estimated bus voltage that is extremely close to the actual bus voltage is used as the control signal. Each distributed unit estimates the bus voltage utilizing local voltage and current information as well as a roughly estimated line resistance, and the difference among the estimations are always suppressed to zero based on the injected SACS. Firstly, the proposed coordinated control method is explained in detail. Then, the comprehensive design procedure for control parameters is provided via steady state and dynamic analysis of the system. Finally, simulation and experiment results demonstrate the effectiveness of the proposed control method.
KW - DC bus signal
KW - DC microgrids
KW - small AC signal
UR - https://www.scopus.com/pages/publications/85143795896
U2 - 10.1109/PEAC56338.2022.9959264
DO - 10.1109/PEAC56338.2022.9959264
M3 - 会议稿件
AN - SCOPUS:85143795896
T3 - PEAC 2022 - 2022 IEEE International Power Electronics and Application Conference and Exposition, Proceedings
SP - 962
EP - 967
BT - PEAC 2022 - 2022 IEEE International Power Electronics and Application Conference and Exposition, Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 3rd IEEE International Power Electronics and Application Conference and Exposition, PEAC 2022
Y2 - 4 November 2022 through 7 November 2022
ER -