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Design and Evaluation of a High Current Gain Resonant Inverter for Subsea Electrical Heating
  • Anindya Ray ,
  • Rajashekara Kaushik
Anindya Ray
University of Houston

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Rajashekara Kaushik
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Direct electrical heating (DEH) is a well-established method for preventing hydrate formation inside subsea oil transfer pipelines. However, poor efficiency and high reactive power requirement of the existing line-frequency DEH systems have necessitated high-frequency power processing along with reactive power compensation. To meet these design objectives, a dc-ac converter using an LCCL resonant tank is presented in this paper to function as a high-frequency alternating current source. The LCCL resonant tank is tuned at the frequency of the peak tank current gain to maximize the heat generation and reduce the VA rating of the tank. The peak current gain operation also ensures zero voltage switching (ZVS) of the bridge inverter devices. Detailed frequency domain analysis and design guidelines are presented for the proposed LCCL resonant inverter (RI). Experimental results on a 10 A laboratory prototype and hardware-in-the-loop results for a 350 A system illustrate the advantages of the LCCL RI in DEH application.
Jul 2022Published in IEEE Transactions on Industry Applications volume 58 issue 4 on pages 5093-5103. 10.1109/TIA.2022.3172392