Grounding fault detection of distribution networks facilitates working efficiency improvement,of which most studies currently focus on the use of a single characteristic variable of the fault.In this paper,through the flexible use of means such as wavelet analysis,fast Fourier transform,etc.,it is indicated that the transient DC component of faulty phase current can be used as a criterion for detecting the number of faulty phase.Therefore a comprehensive fault detec-tion and identification method is proposed,which has been proved accurate and efficient for various types of grounding faults.
关键词
多特征/综合配电网/接地故障检测/高灵敏性检测
Key words
multiple features/integrated distribution network/grounding fault detection/highly sensitive detection
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