A new method, based on the analysis of frequency spectrum of instantaneous power, for the discrimination between internal fault currents and inrush currents in transformer is proposed.
在分析瞬时功率频谱特性的基础上，提出了一种基于瞬时功率的变压器励磁涌流和内部故障电流识别新方法。
The transformation of the instantaneous value symmetry component applied, the positive sequence space vector of fault component of the voltage and current can be derived.
应用瞬时值对称分量变换，可提取电压、电流故障分量的正序空间向量。
Further more, the switches reclose at optimal reclosing time by phase for instantaneous fault and shut down reclosure for permanent fault.
瞬时故障时在最佳重合时刻分相重合，永久故障时闭锁重合闸。
To solve the problem in obtaining bearing fault characteristics of induction motors, a method based on instantaneous power decomposition via wavelet packet is put forward.
针对感应电动机轴承故障特征提取的不足，提出了瞬时功率小波包分解的方法。
As the power systems expand, the fault currents would be increase to exceed the instantaneous capacity and the interrupting capabilities of the existing circuit breakers.
电力系统的容量和短路电流越来越大，相应的对系统的稳定性和断路器的开断能力等提出了更高的要求。
As the power systems expand, the fault currents would be increase to exceed the instantaneous capacity and the interrupting capabilities of the existing circuit breakers.
电力系统的容量和短路电流越来越大，相应的对系统的稳定性和断路器的开断能力等提出了更高的要求。
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