基于DSP的配电网单相接地故障选线装置

目前在我国铁路配电网中,多数采用了中性点不直接接地的小电流接地系统,因此系统经常发生单相接地故障。本文根据单相接地故障工况,提出了单相接地故障选线原理,并基于具有强大浮点运算能力的数字信号处理器(DSP)设计出一种新型配电网小电流单相接地选线装置。

Since currently in China the railway power supply distribution system adopts low current earthing system with indirect earthing of neutral, so the fault of single phase earthing in the system takes place frequently. With reference of actual conditions for single phase earthing fault, the paper puts forward the principle on single phase earthing faulty line selection, and with the support of digital signal processing device (DSP) capable in floating point computation, to design a new type of low current single phase earthing faulty line selection device for power distribution system.