HPLC is a broadband high-speed power carrier communication scheme that operates in the frequency range of 700KHz~12MHz. It adopts advanced orthogonal multi carrier (OFDM) digital communication technology and is optimized for the domestic power grid environment and application requirements. It has high communication speed, automatic interference avoidance frequency band, high reliability, real-time networking, and reliable routing. It includes interconnection and intercommunication solutions for single-phase, three-phase, concentrator, secondary acquisition and other modules that comply with the specifications of the State Grid and the South Grid, and corresponding modules can be specified according to user needs and specifications.