For the low-voltage side of power line communication network

power line channel has the characteristics of unpredictability

time-varying and diversity

which leads to a low communication reliability problem in practical applications. While two way automatic communication system(TWACS)has the advantages of strong anti-interference and anti-attenuation abilities. Currently path search signaling and data transmission both use the same technology. Search path signaling communication reliability is low

which can severely restrict the path selection algorithm and the effect of relay baton. For this reason

on the basis of network topology and characteristics of power line communication

a PLC path search algorithm merged with TWACS is proposed. By means of the initial routing table optimization

parameter analysis and comparative analysis

the effectiveness and superiority of the algorithm can be illustrated. Meanwhile

the anti-destruction ability of the path search algorithm is analyzed. The modeling theory of this algorithm is summarized in depth. Results show that the algorithm has improved the effectiveness and reliability to better meet the demand of the power line distribution network relay transmission.