Controller Design for the Rating-Proportional Current Sharing in Modular Hybrid Critical Load Substation Transformers

Prabowo, Y and Iyer, VM and Bhattacharya, S and Aeloiza, E (2021) Controller Design for the Rating-Proportional Current Sharing in Modular Hybrid Critical Load Substation Transformers. In: 12th IEEE Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021, 24-27 May 2021, Singapore, pp. 899-905.

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Abstract

Partially rated power electronic modules (PEMs) can be interfaced with conventional line-frequency transformers (LFTs) to realize hybrid transformers (HTs). Hybrid transformers possess higher controllability as compared to conventional LFTs. In this paper, the parallel operation of multiple such hybrid transformer systems to form a modular architecture is proposed. The proposed system utilizes back-to-back power converter units with a lead/follower (L/F) control strategy. It entails reliable and resilient operations for critical load substation deployment during disasters and emergencies. The partially-rated power electronic module is exploited to achieve rating-proportional current sharing and voltage regulation. The controller design for the rating-proportional current sharing is presented. The DC-side stability of the back-to-back power converter unit with the proposed current sharing controller is assessed. Simulation results are included to validate the proposed concept. © 2021 IEEE.

Item Type:	Conference Paper
Publication:	Proceedings of the Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	Energy conversion; Power converters; Power electronics; Transformer substations; Voltage regulators, Control strategies; Controller designs; Conventional line; Modular architectures; Parallel operations; Power electronic modules; Substation transformers; Transformer systems, Controllers
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	03 Dec 2021 07:50
Last Modified:	03 Dec 2021 07:50
URI:	http://eprints.iisc.ac.in/id/eprint/70160

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