Transmission line condition monitoring system is an important part of the smart grid in transmission link

and communication network plays a vital role in the transmission line condition monitoring system. The communication style between on line monitoring equipment and master stations are using public wireless access

such as GSM

GPRS and CDMA 3G

which causes some problems such as poor stability

security and privacy

data transmission not in time

slow transmission speed and high cost of communication in the late and threats the safe operation of the power system. In view of the large-span transmission line on-line monitoring platform project

it designs a special communication network based on EPON and WiMAX in power systems. In order to make the EPON system and WiMAX system run individually and easy to maintain

without changing any part of the original technical system

taking into account overall factors

it adopts an independent architecture fusion network of EPON and WiMAX. Its uses the wind and sunlight complementary power supply at the same time

which guarantees largespan transmission line on-line monitoring with reliable power supply under any weather condition. At present

large-span lines on-line monitoring system running effect is good.