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中文摘要：
针对电磁发射系统脉冲电源到发射装置的输电过程中可能的短路故障进行了研究，通过理论分析研究了故障情况下的电路结构，分析了回路故障电流及其影响因素并进行了仿真。仿真结果表明：电缆短路故障可能导致发射装置端回路存在极大的电流，故障位置距离发射端越近，发射装置端回路可能遭受的故障电流越大，因此需要采取保护措施对电缆进行故障限流，限流器的安装位置应位于电缆的发射装置端；对于PFN模块端回路，其故障电流受故障位置的影响比较小，主要取决于调波电感、储能电容及充电电压。
英文摘要：
The probable short fault in transmission cables between the pulsed power system and elec- tromagnetic launch system is studied. In order to pinpoint the effects and influence factors of fault cur- rent, the circuit structure is analyzed by theoretical method and numerical simulation. Furthermore, a limiter which should be installed in the end of the cable close to launcher is proposed to limit the fault current. The limiter is supposed to have tow resistivity, low inductance gradient and high resistance- temperature coefficient. The analysis and simulation results show that fault position plays an impor- tant role in high current of the circuit for launcher side of fault. The current of the circuit of PFN side of fault mainly depends on PFN parameters（inductance, capacitance and charge voltage）, and nearly has nothing to do with fault position.
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