输电线路行波电流全波采集装置的原理及应用

在现有的行波电流采集装置的技术方案上加以改进和创新,提出了的一种新型的行波电流信号采集电路。即利用一个多路开关对两个不同精度和测量范围的电流互感器进行切换的方式来分别实现测量用电流信号采集和故障电流的采集,利用一个FIFO存储器连接A/D转换器输出,实现数据的缓冲和临时存储,为后续的故障电流完整信息恢复提供支持,从而使测量精度和抗饱和能力得到提高。

The Principle and Application of Transmission Line’s Travelling-wave Current Full-wave Acquisition Device

Based on the improvement and innovation of existing technological scheme of travelling-wave current acquisition device,this paper puts forward a new kind of traveling-wave current signal acquisition circuit,that is to use a multi-way switch to switch two current transformers with different precision and measurement range to respectively realize the measurement-used current signal acquisition and fault current collection,and realize the buffering and temporary storage of data by utilizing a FIFO memory connected to the A/D converter output to provide support for the subsequent complete information recovery of the fault current and thus improve the measurement precision and anti-saturation capacity.