基于S变换的三相短路故障电压暂降检测研究

文章提出了一种基于S变换的短时电能质量扰动检测方法,并从S变换的结果、S复矩阵以及S模矩阵中提取所要的数据并用来对三相短路故障的电压暂降的幅值、相位跳变、持续时间和谐波含量进行分析。最后通过分析仿真结果表明,该方法能够很好地实现对三相短路故障电压暂降的各特征量检测。

Three-phase short-circuit fault voltage sag detection based on the S transform

A method of short duration power quality disturbance based on S-transform has been proposed. The data which has been extracted from the result of the S-transform, the S-complex matrix as well as the S-mode matrix, are used to analysis the amplitude of the voltage of the three-phase short-circuit fault dips, the phase transition duration and harmonic content. By analyzing simulation results, this method shows a good detection quality of the characteristics of three-phase short-circuit fault voltage dips.