【摘要】 海洋可控源电磁法(MCSEM)是探测深海石油、天然气、天然气水合物和其他电性异常目标体的有效方法之一.MCSEM探测的硬件系统由发射和接收两大部分组成，发射系统包括远程甲板监控单元、甲板变频升压单元、光电复合深拖缆、发射机拖体、发射天线和尾标等部件.本文从可控源电磁场中与发射系统相关的参数探讨出发，以大功率电能传输、大电流开关逆变、IGBT控制波形产生等核心要素为框架，深入分析了具有自主知识产权的2000A级海洋可控源电磁发射系统关键技术.实验室测试和海洋试验结果证明，发射机采用的新型干湿舱混合设计方法和GPS秒脉冲长距离传输技术，显著提高了发射电流和散热性能，可在千米水深的近海底实现稳定可靠的远程遥控通信和2000A级的开关逆变，建立DC-10 Hz的大电流人工电磁场源.本文介绍的内容为深海大功率地球物理仪器的设计提供了参考.更多还原

【Abstract】 Marine Controlled Source Electromagnetic(MCSEM) is one of the effective methods to detect deep-sea oil, gas, gas hydrate and other electrically anomalous targets. The hardware system of MCSEM detection consists of two major parts: transmitter and receiver, and the transmitter system includes components such as remote deck monitoring unit, deck inverter booster unit, deep tow cable, towed transmitter, transmission antenna and tail. Starting from the exploration of the parameters related to the transmitter system in the controlled source electromagnetic field, this paper analyzes in depth the key technology of 2000A-class marine controlled source electromagnetic transmitter system with independent intellectual property rights, taking the core elements of high-power electrical energy transmission, high-current switching inverter, and IGBT-controlled waveform generation as the framework. The results of laboratory tests and oceanic tests have proved that the new hybrid design method of dry and wet compartments and GPS second pulse long distance transmission technology adopted by the transmitter has significantly improved the transmitter current and heat dissipation performance, and can realize stable and reliable remote remote control communication and 2000A-class switching inverter to establish a high-current artificial electromagnetic field source of DC-10Hz in the near seabed at a depth of several thousand meters. The content presented in this paper provides a reference for the design of deep-sea high-power geophysical instruments.更多还原