Open AccessBidirectional power sharing in an ac/dc system with a dual active bridge converter
Author(s) -
Datta Amit Jyoti,
Ghosh Arindam,
Zare Firuz,
Rajakaruna Sumedha
Publication year - 2019
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2018.5304
Subject(s) - converters , microgrid , voltage droop , power (physics) , computer science , dual (grammatical number) , control theory (sociology) , buck converter , electrical engineering , electronic engineering , voltage , engineering , voltage source , control (management) , physics , art , literature , quantum mechanics , artificial intelligence
This study introduces a bidirectional power sharing scheme between an ac electric utility and a dc microgrid. These two are connected together through an interlinking converter (IC) and a dual active bridge (DAB). The proposed control scheme allows predefined amount of power to be supplied from the ac to dc side or the other way around. The DAB is connected at the dc side of the IC and it controls the bidirectional power flow. The dc microgrid contains dc–dc converters, where boost converters are used with the sources and buck converters are used to supply loads. These dc–dc converters and the DAB are controlled by state feedback with integral control in a linearised discrete domain. The DAB linearisation and control law are presented in detail. The dc microgrid is controlled by conventional V‐P droop where the power from/to the ac side is considered as negative/positive load. Detailed simulation results are presented to validate the proposal. Also some hardware results are included that support the findings.