重频脉冲下海洋电火花震源的研制
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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.
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.
引文
[1]裴彦良,王揆洋,刘晨光,等.电火花震源系统充电技术研究[J].海洋技术,2007,26(3):73-76.
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[7]BIEBACH J,EHRHART P,MULLER A,et al.Compact modularpower supplies for superconduting inductive storage and for capaci-tor charging[J].IEEE Trans on Magnetics,2001,37(1):353-357.
[8]石一,杨小卫,高迎慧,等.光纤隔离变换器在高压充电电源中的应用[J].高电压技术,2008,34(7):1422-1426.
[2]RUTGERS W R,JONG I D.Multi-tip sparker for the generation ofacoustic pulses[J].Sensor Review,2003,23(1):55.
[3]PARKINSON R.High resolution site surveys[M].New York:SponPress,2001.
[4]钟和清,徐至新,邹云平,等.串联谐振CCPS电路结构研究[J].电气传动,2005,35(7):43-44.
[5]钟和清,徐志新,邹旭东,等.软开关高压开关电源研究[J].高电压技术,2003,29(8):7-9.
[6]尚雷,王相綦,裴元吉,等.新型软开关高压脉冲电容恒流充电技术分析[J].强激光与粒子束,2001,13(2):241-244.
[7]BIEBACH J,EHRHART P,MULLER A,et al.Compact modularpower supplies for superconduting inductive storage and for capaci-tor charging[J].IEEE Trans on Magnetics,2001,37(1):353-357.
[8]石一,杨小卫,高迎慧,等.光纤隔离变换器在高压充电电源中的应用[J].高电压技术,2008,34(7):1422-1426.
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