基于S变换的三相短路故障电压暂降检测研究

Three-phase Short-circuit Fault Voltage Sag Detection Based on S Transform

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。

A method of short duration power quality disturbance based on S - transform was proposed. Data was extracted from the S - transform result, the S - complex matrix and the S - mode matrix, to study the voltage sag amplitude of the three- phase short - circuit fault, phase jump, duration and harmonic content. The simulation results show that this method achieves a good detection quality for the characteristics of three - phase short - circuit fault voltage dips.