Characteristic Analysis of Cascading-Combination DC/DC Controlled-Source Circuit for Marine Electromagnetic Transmitter

Tao, Haijun; Zhang, Zheng; Guo, Lina

doi:10.1080/15325008.2023.2199742

Electric Power Components and Systems

2023

DOI: 10.1080/15325008.2023.2199742

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Characteristic Analysis of Cascading-Combination DC/DC Controlled-Source Circuit for Marine Electromagnetic Transmitter

Haijun Tao

Zheng Zhang

Lina Guo

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Research on Underwater Constant High-Voltage DC Switching Technology for MCSEM

Ren,

Wang,

Luo

et al. 2024

Sensors

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The marine controlled source electromagnetic (MCSEM) transmitter can transmit high currents near the seabed to detect the electrical structure of the seafloor. The use of three-phase alternating current (AC) transmission can lead to three-phase imbalance, which results in an excessive current in one phase’s power line and affects the safety of the tow cable. This paper proposes an MCSEM underwater constant high-voltage direct-current (DC) switching scheme that replaces AC transmission with DC transmission. This scheme can fundamentally avoid three-phase imbalance and the AC loss caused by inductance. After establishing a simulation model to analyze the effect of the scheme, the relevant hardware units were designed. The hardware unit mainly consists of three parts: a DC switching inverter unit, a filter unit, and a step-down rectification unit. The DC inverter unit controls six insulated gate bipolar transistor (IGBT) modules with sinusoidal pulse width modulation (SPWM) signals to convert DC to three-phase AC power; the filter unit filters out extra harmonic components; and the step-down rectification unit converts high-voltage three-phase AC to low-voltage DC. The scheme ultimately achieved an adjustable DC output of 48.3–73.4 V under a constant DC input voltage of 3000 V and effectively reduced the current on the cable. This scheme has the potential to replace the previous AC transmission, reducing the risk of tow cable burnout and enhancing the safety of MCSEM operations.

show abstract

Research on Underwater Constant High-Voltage DC Switching Technology for MCSEM

Ren,

Wang,

Luo

et al. 2024

Sensors

View full text Add to dashboard Cite

show abstract

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Characteristic Analysis of Cascading-Combination DC/DC Controlled-Source Circuit for Marine Electromagnetic Transmitter

Cited by 1 publication

References 20 publications

Research on Underwater Constant High-Voltage DC Switching Technology for MCSEM

Research on Underwater Constant High-Voltage DC Switching Technology for MCSEM

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