Design and Evaluation of a High Current Gain Resonant Inverter for Subsea Electrical Heating

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 processing along with compensation. To meet these design objectives, dc–ac converter using an LCCL resonant tank presented in this article to function as alternating current source. The tuned at frequency maximum gain maximize heat generation reduce VA rating tank. operation also ensures zero-voltage switching bridge inverter devices. Detailed domain analysis guidelines are proposed (RI). Experimental results on 10-A laboratory prototype controller hardware-in-the-loop 350-A system illustrate advantages RI application.