重频脉冲下海洋电火花震源的研制  

Development of an underwater sparker with repetitive pulse

作　　者：史孝侠[1,2,3] 高迎慧[1,2] 孙鹞鸿[1,2] 刘坤[1,2] 严萍[1,2] 

机构地区：[1]中国科学院电工研究所,北京100190 [2]中国科学院电力电子与电气驱动重点实验室,北京100190 [3]中国科学院研究生院,北京100049

出　　处：《电源技术》2013年第4期646-649,共4页Chinese Journal of Power Sources

基　　金：国家自然科学重点基金(50907068);国家自然科学基金(50437020);清华大学电力系统及发电设备控制和仿真国家重点实验室开放基金(SKLD09KM15)

摘　　要：为满足海洋高分辨率地震勘探的需要,研制了一台储能为2 kJ的电火花震源装置。海洋电火花震源系统包括高频高压充电单元、脉冲放电单元和放电电极三部分。高频高压充电单元采用基于全桥逆变和串联谐振技术的恒流充电工作模式,有自触发和外触发两种工作方式,可分别工作在单次和重复频率充电状态,充电速率可达1 kJ/s。脉冲放电单元额定电压5 kV DC,额定储能2.5 kJ,最大放电电流为11 kA。为实现电晕放电,放电电极的高压电极采用400个电极组合的电极结构。实验表明该震源在30次/min的频率下连续稳定工作。A compact 2 kJ ocean sparker was developed for high resolution ocean seismic survey. The ocean sparker mainly consisted of high frequency high voltage charging power supply, a pulse supply and discharging electrodes. The high voltage charging power supply was designed in a constant-current charging mode based on the series resonance and full bridge inverter technologies and it could be operated at single and repetitive mode separately, and the average charging rate is 1 kJ/s. The rated parameter of the pulse supply is 200 μF/5 kVDC and a maximum discharge current of 11 kA can be available. The high voltage electrodes of the discharging electrodes consisted of several hundreds of electrodes for corona discharging. The experimental results show that the ocean sparker can be operated at repetition rates of 30 shots/min stability and reliability. Future field debugging will be done in the near future.

关 键 词：高分辨率地震勘探 电火花震源 串联谐振 多电极 水中放电 

分 类 号：TM91[电气工程—电力电子与电力传动]