Abstract: Abstract:In order to meet the information transmission demand of smart grid and to ensure the massage transmission between the master station and substations of power grid to be “no omissions and no additional” as far as possible, the defects of the intelligent gateway in double main gateways operation mode were analyzed, and a logical channel redundant scheme, in which the two intelligent gateways in the substation operate in “standalone mode for lower layer and mainstandby mode for upper layer”, was proposed. The implementation mechanism of the scheme was analyzed briefly. The mainstandby mechanism between main station and substations was normalized. The reliability and the veracity of the electric power information transmission were improved.

Key words: Keywords:intelligent gateway, double main gateways, main and standby gateways, doublegateway synchronization