1. A Decentralized Optimal Operation of AC/DC Hybrid Microgrids Equipped With Power Electronic Transformer
- Author
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Zhang Tao, Lei Dong, Naishi Chen, Yingyun Sun, and Tianjiao Pu
- Subjects
General Computer Science ,Computer science ,020209 energy ,020208 electrical & electronic engineering ,General Engineering ,Power injection ,02 engineering and technology ,power electronic transformer ,law.invention ,autonomous operation ,decentralized optimal power flow ,Control theory ,law ,0202 electrical engineering, electronic engineering, information engineering ,General Materials Science ,Voltage droop ,Voltage source ,steady state model ,lcsh:Electrical engineering. Electronics. Nuclear engineering ,Transformer ,lcsh:TK1-9971 ,AC/DC hybrid microgrids - Abstract
In the AC/DC hybrid microgrids equipped with power electronic transformer (PET), different AC grids and DC grids are connected through multiport PET to operate the entire network in a secure and economic manner. This paper proposes a decentralized optimal power flow model, considering the multiport coordinated control strategy of PET, for running autonomous AC/DC hybrid microgrids. To optimize the power flow in the network, the steady state model of PET is established, including voltage source converter power injection model and Kriging model. By introducing a secondary droop control layer can realize the autonomous operation of AC/DC hybrid microgrids and increase the utilization efficiency of distributed generations. Then using the analytical target cascading approach, each AC/DC sub-microgrid is regarded as different autonomous subjects. The distributed PET is as power coupling node and information interaction node to decompose the optimal problem of AC/DC hybrid microgrids equipped with PET which is solved in parallel. The obtained subproblems for these grid levels are solved with a nested solution process. The simulation results verify the correctness and effectiveness of the proposed model in this paper.
- Published
- 2019