Accurate fault current sampling device for power transmission

The invention discloses an accurate fault current sampling device for a power transmission line, which is provided with tree normal channels and three fault channels, wherein each channel is composed of a current preposed processing module, a signal conditioning module, an analog-to-digital conversion module, a channel switching module, a data processing module, a data storage model, a peripheral clock control module and a communication module which are connected sequentially according to the signal trend. The device collects current signals under different states purposefully through the switching of signal collecting channels, the spectrum range of the collected signals is widened, the high-frequency transient fault current signal distortion is prevented, and the complete collection of working frequency fault current information is realized.