输电线路雷电流行波在线监测装置

Development of On-Line Device for Monitoring Lightning Current Waveform in Transmission Line

研制基于FPGA&DSP控制核心的雷电流行波在线监测装置,较为详细地论述了其工作原理、硬件结构和软件设计。通过输电线路现有的电流互感器获取雷电流行波信号,利用FPGA和DSP对雷电流行波进行高速采样和存储控制,实现雷电流的在线监测,同时增加GPS精确授时模块为每一个雷电流行波到达时间定标。试验结果表明,该装置能够准确地记录雷电流波形、幅值及到达时间,为线路雷击故障分析、雷击定位等提供重要数据。

A kind of on-line device with FPGA and DSP as the core of control circuit for monitoring lightning current waveform in transmission line is introduced. And the working process, hardware and software design of these devices are also discussed. The signals of lightning current waveform are obtained by current transformer in transmission line. Using the high speed sampling and storage control of FPGA and DSP to lightning current waveform, the realtime inspection of lightning current waveform is realized. A GPS precision timing module is introduced to the arriving time of every lightning current wave. Experiments have proven that the device can record the waveform, amplitude and arriving time of lightning current, thus can provide important data for fault analysis of lightning strikes and lightning locating.