Abstract:

Due to the impedance characteristics, signal attenuation characteristics and noise characteristics of Power Line Channel (PLC), the reliability of the PLC becomes the important factor of restricting its wide application. The physical topology structure and the logical topology structure of low voltage distribution network are analyzed. According to the engineering characteristics of our country's lowvoltage concentrated meter reading system application, a PLC automatic routing method based on spanning tree in graph theory is proposed. The method can effectively construct power line communication network routes, and dynamically maintain the routes in accordance with the variation of channel, thus ensuring the reliability of power line network. The experimental test proves the validity, reliability and practicability of this routing method.
    

Key words: ergodic search algorithm;PLC;routing method;net reconstruction;lowvoltage network