TY - JOUR
T1 - Unified decentralised control for both grid-connected and islanded operation of cascaded-type microgrid
AU - Li, Lang
AU - Sun, Yao
AU - Hou, Xiaochao
AU - Su, Mei
AU - Zhang, Xin
AU - Wang, Peng
AU - Guerrero, Josep M.
N1 - Funding Information:
This work was supported in part by the National Natural Science Foundation of China under Grant 61622311 and 61933011, the
Funding Information:
Hunan Provincial Key Laboratory of Power Electronics Equipment and Grid under Grant 2018TP1001, the Project of Innovation-driven Plan in Central South University under Grant 2019CX003, the Major Project of Changzhutan Self-dependent Innovation Demonstration Area under Grant 2018XK2002.
Publisher Copyright:
© The Institution of Engineering and Technology 2020
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/12
Y1 - 2020/12
N2 - In order to ensure the uninterrupted power supply, it is necessary for the microgrid to operate in both grid-connected mode and islanded mode. To address this concern, this study proposes a unified decentralised control strategy for both grid-connected and islanded operation of the cascaded-type microgrid (CMG). It can realise the smooth mode switching without the need of changing controllers. In terms of the proposed scheme, the system always holds a unique equilibrium point regardless of the grid-connected or islanded operation. Since the CMG is performed in a decentralised manner without any communication, it is a reliable and cost-effective solution. Moreover, the self-synchronisation of each DG is obtained under both the resistance-inductance (RL) and resistance-capacitance (RC) loads. The small-signal stability is proved and the design of control parameters is given. Finally, the feasibility of the proposed method is verified by simulation and OPAL-RT-based real-time simulation results.
AB - In order to ensure the uninterrupted power supply, it is necessary for the microgrid to operate in both grid-connected mode and islanded mode. To address this concern, this study proposes a unified decentralised control strategy for both grid-connected and islanded operation of the cascaded-type microgrid (CMG). It can realise the smooth mode switching without the need of changing controllers. In terms of the proposed scheme, the system always holds a unique equilibrium point regardless of the grid-connected or islanded operation. Since the CMG is performed in a decentralised manner without any communication, it is a reliable and cost-effective solution. Moreover, the self-synchronisation of each DG is obtained under both the resistance-inductance (RL) and resistance-capacitance (RC) loads. The small-signal stability is proved and the design of control parameters is given. Finally, the feasibility of the proposed method is verified by simulation and OPAL-RT-based real-time simulation results.
UR - http://www.scopus.com/inward/record.url?scp=85098843142&partnerID=8YFLogxK
U2 - 10.1049/iet-rpg.2019.0990
DO - 10.1049/iet-rpg.2019.0990
M3 - Journal article
AN - SCOPUS:85098843142
SN - 1752-1416
VL - 14
SP - 3138
EP - 3148
JO - IET Renewable Power Generation
JF - IET Renewable Power Generation
IS - 16
ER -