DC power line communication based on power/signal dual modulation in phase shift full bridge converters

Jin Du, Jiande Wu, Ruichi Wang, Zhengyu Lin, Xiangning He

Research output: Contribution to journalArticlepeer-review

Abstract

For intelligent DC distributed power systems, data communication plays a vital role in system control and device monitoring. To achieve communication in a cost effective way, power/signal dual modulation (PSDM), a method that integrates data transmission with power conversion, can be utilized. In this paper, an improved PSDM method using phase shift full bridge (PSFB) converter is proposed. This method introduces a phase control based freedom in the conventional PSFB control loop to realize communication using the same power conversion circuit. In this way, decoupled data modulation and power conversion are realized without extra wiring and coupling units, and thus the system structure is simplified. More importantly, the signal intensity can be regulated by the proposed perturbation depth, and so this method can adapt to different operating conditions. Application of the proposed method to a DC distributed power system composed of several PSFB converters is discussed. A 2kW prototype system with an embedded 5kbps communication link has been implemented, and the effectiveness of the method is verified by experimental results.
Original languageEnglish
Pages (from-to)693-702
Number of pages10
JournalIEEE Transactions on Power Electronics
Volume32
Issue number1
Early online date11 Feb 2016
DOIs
Publication statusPublished - Jan 2017

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Keywords

  • DC distributed power system
  • power line communication
  • power/signal dual modulation
  • phase shift full bridge

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