Research on equipment performance index evaluation system for HPLC

Since signal transmission is performed on a 220V/330V low voltage power line, there is a series of problems such as distribution transformer blocking the carrier signal, more load access leading to significant signal reduction, inherent pulse interference of power line. Therefore, the channel transmission characteristics of power network must be considered when power lines are used to transmit carrier communication signals with high frequency and low energy. On the premise of analyzing the necessity of power line carrier communication performance index evaluation, the channel input impedance characteristics, channel noise and interference characteristics, channel attenuation characteristics are studied. On this basis, the power line carrier communication equipment performance index evaluation system based on fuzzy comprehensive evaluation method is studied.