A Low-Complexity Load-Decoupled Talkative Power Conversion Strategy for the Dual-Active-Bridge Converter

Talkative power conversion (TPC) utilizes power circuits of power converters to transmit information, such as the status of energy sources or loads, in interconnected converter systems. Existing TPC schemes for the dual active bridge (DAB) converter involve decoding algorithms that require computation-intensive operations, such as the fast Fourier transform, and employ carrier signals with amplitudes dependent on converter loading. This paper proposes a low-complexity load-decoupled TPC strategy for the DAB. The proposed scheme transmits information by utilizing a controlled DC bias introduced in the current of the reactive network of the DAB. The message thus encoded into the terminal voltage ripple can be decoded, by another converter connected to the same terminal, using a tuned filter followed by a threshold comparison. The analysis of the TPC method is presented along with implementation and design guidelines. The proposed TPC approach is validated in circuit simulation and experiments on a 110 V, 150 W, 50 kHz DAB prototype, achieving a transmission bit rate of 2 kbps.

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Published in:
2024 IEEE Energy Conversion Congress and Exposition (ECCE)
Publisher:
IEEE
Pages:
2628 - 2633
Date Issued:
2024
DOI:
10.1109/ECCE55643.2024.10861684
URN:
urn:nbn:de:gbv:8:3-2026-00565-2
Language:
English
Type of Resource:
Text
Project:
European Commission
Super-HEART: a fault-tolerant and highly efficient energy hub with embedded short-term energy storage for high availability electric power delivery [101057679]
Publisher:
IEEE
Keywords:
Band-pass filters; Legged locomotion; Loading; Prototypes; Integrated circuit interconnections; Switches; Threshold voltage; Decoding; Power conversion; Transient analysis; Power Conversion; Fast Fourier Transform; Carrier Frequency; Bitrate; DC Bias; Circuit Simulation; Terminal Voltage; Voltage Ripple; Decoding Algorithm; Dual Active Bridge; Dual Active Bridge Converter; Waveform; Time Constant; Operation Mode; Information Transfer; Normal Operation; Switching Frequency; DC Voltage; Power Transfer; Voltage Components; Duty Ratio; AC Component; DC Bias Voltage; Slow Mode; Turns Ratio; DC Magnetization; Odd Harmonics; Analog Filter; Reactive Current; dc bias; dual active bridge; switching ripple; talkative power; tuned filter
Classification:
Accepted version
DDC subject of DNB:
621.3 Electrical engineering, electronics
Hosting institution:
Faculties, Faculty of Engineering

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