Power Line Communication(PLC)technology is an important communication method which has been extensively used in power system. In order to solve the impedance mismatch of PLC system, an adaptive impedance matching model for power line communication based on Quantum Particle Swarm Optimization(QPSO)has been proposed. With the help of ? type matching network, PLC system can effectively eliminate matching restricted areas and get very accuracy matching results and fast matching speed. Dealing with the asymmetri...