As the main data transmission channel of power monitoring system

the reliability of power dispatching data network directly affects the work related to power grid regulation. The construction of the second access network of regional dispatching data network can effectively improve the performance indicators such as data transmission reliability

automation channel availability and network security. By analyzing the reliability of equipment redundancy

routing strategy and node deployment location

a network reliability calculation method of regional dispatching data network is proposed. Based on the optimal network reliability

the design principle and process of the second access network of regional dispatching data network are put forward. Considering the existing network structure of dispatching data network comprehensively

the number of new nodes of the second access network of regional dispatching data network is obtained

the redundancy reliability analysis is completed

and the private network routing strategy and public network routing strategy are analyzed. The high reliability routing strategy scheme coordinated and unified with the existing grid structure is obtained. According to the topology of regional dispatching data network

the reliability calculation methods of different nodes are obtained. By adjusting the node location distribution

the alternative design scheme of the second access network of regional dispatching data network with high reliability is obtained too. Finally

the design scheme with the highest reliability is selected through service verification.