Three-Level DC-DC Controlled-Source Circuit of Marine Electromagnetic Detection Transmitter

Nowadays, marine electromagnetic method is a geophysical method which can effectively explore natural gas hydrate (NGH) resources. This method acquires seafloor structure and distribution laws of mineral resources by transmitting high-power electromagnetic waves to the seafloor, and its detection depth relies on the intensity of transmitted electromagnetic waves. At present, marine electromagnetic transmitter is not proper for transmission of high-power electromagnetic waves, and therefore, a novel controlled-source circuit of soft switching three-level marine electromagnetic transmitter is proposed in this paper, one step-down winding is added at the secondary side of high-frequency transformer in series connection with a linear inductor, asymmetric phase-shift PWM control is used, and soft switching of controlled-source circuit within the overall power range is realized. A detailed analysis of the operation process and circuit characteristics is given, and finally, a prototype is designed. Experimental results indicate that this circuit is of wide ZVS range and high efficiency, and it meets requirements for deep-sea detection of high-voltage power supply transmitter.

[1]  F. Shubitidze,et al.  Underwater controlled source electromagnetic sensing: Locating and characterizing compact seabed targets , 2012, 2012 Oceans.

[2]  Ming Deng,et al.  Time synchronization for marine controlled source electromagnetic recorder , 2012, FSKD.

[3]  N. Yahya,et al.  2D forward modeling of marine Controlled Source Electromagnetic (CSEM) data for salt-dome and stratigraphy trap reservoir , 2012, 2012 4th International Conference on Intelligent and Advanced Systems (ICIAS2012).

[4]  M. Jegen,et al.  Quantification of marine sulfide deposits using marine electromagnetic methods , 2011, OCEANS'11 MTS/IEEE KONA.

[5]  Zhou Yong.  A ZVS Three-Level DC-DC Converter With Auxiliary Transformer , 2011 .

[6]  Xinbo Ruan,et al.  Zero-Voltage and Zero-Current-Switching PWM Combined Three-Level DC/DC Converter , 2010, IEEE Transactions on Industrial Electronics.

[7]  Xiguo Ren,et al.  Small-Signal Modeling of Marine Electromagnetic Detection Transmitter Controlled-Source Circuit , 2015 .

[8]  Yiming Zhang,et al.  A Novel Circuit of Marine Controlled-source Electromagnetic Transmitter , 2016 .

[9]  Xinbo Ruan,et al.  Zero-voltage-switching PWM full-bridge three-level converter , 2004, The 4th International Power Electronics and Motion Control Conference, 2004. IPEMC 2004..

[10]  J. R. Pinheiro,et al.  The three-level ZVS PWM converter-a new concept in high voltage DC-to-DC conversion , 1992, Proceedings of the 1992 International Conference on Industrial Electronics, Control, Instrumentation, and Automation.

[11]  Leonard J. Srnka,et al.  Special Section — Marine Controlled-Source Electromagnetic Methods An introduction to marine controlled-source electromagnetic methods for hydrocarbon exploration , 2007 .