According to the feature of voltage falling and current rising when short-circuit fault occurs in ship power system, a digital intelligent controller is designed base on DSP. A fast detecting algorithm is introduced in detail and virtual power is put forward to take place of current magnitude algorithm by simple instantaneous power algorithm. After introducing the choice of digital micro processor and the implementation of soft algorithm and trip signal output circuit,a prototype based on DSP TMS320F2407 was designed. The experiment results verify that the proposed intelligent controller is quick and feasible and it has a wide application range.%针对舰船电网短路故障时电压跌落、电流增大的特征,研制了基于DSP的数字化智能脱扣器.论述了短路故障的快速检测算法,提出了虚拟功率的概念,并用简单的功率检测算法代替电流幅值检测.介绍了数字处理芯片选择、软件算法实现和脱扣信号输出电路,并利用DSP芯片TM S2407A研制出试验装置完成相关试验.试验结果证明了本装置可以快速、有效地检测出的短路故障,具有广泛的应用前景.
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