Comprehensive assessment of fault-resilient schemes based on energy storage integrated modular converters for AC-DC conversion systems

Wang, Shuren and Vozikis, Dimitrios and Ahmed, Khaled Hani and Holliday, Derrick and Williams, Barry Wayne (2021) Comprehensive assessment of fault-resilient schemes based on energy storage integrated modular converters for AC-DC conversion systems. IEEE Transactions on Power Delivery. ISSN 0885-8977

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    Abstract

    Due to the scalability and flexibility of various modular power electronic converters, integrating split energy storage components (such as batteries and supercapacitors) is feasible and attractive. This paper investigates the operational and economic characteristics of different ac/dc fault-resilient schemes using energy storage integrated modular converters in ac-dc conversion applications. Based on the topological features between the energy storage system (ESS) and the ac and/or dc system, four energy storage based modular converter deployment schemes are presented. Through a case study, operational performance including fault isolation and power compensation under extreme ac/dc fault conditions are verified using time-domain simulation. System losses are evaluated, whereas detailed design considerations, major component usage and estimated capital costs are articulated. The four schemes are compared and selection guidelines are presented. In general, the schemes with independent ESSs would be preferable for such ac-dc conversion applications due to their high operational flexibility.

    ORCID iDs

    Wang, Shuren ORCID logoORCID: https://orcid.org/0000-0002-2311-3652, Vozikis, Dimitrios ORCID logoORCID: https://orcid.org/0000-0002-7196-0442, Ahmed, Khaled Hani, Holliday, Derrick ORCID logoORCID: https://orcid.org/0000-0002-6561-4535 and Williams, Barry Wayne;