With the increasing higher demand for power supply reliability of distribution network

the traditional modes of fault process have been unable to meet the needs of users. The new technology represented by intelligent distributed feeder automation is gradually emerging. In order to solve the problem of inconsistency and inaccuracy of topology model between the intelligent distributed feeder automation system and the main station

this paper proposes a secondary verification scheme of topology model. By analyzing the topology types

the causes of topology change

and the topology update mode

the necessity of topology check is discussed. The object

scheme and defect of primary verification are described. Then

the overall framework of the secondary verification is built

and the flexible check modes are designed

while the corresponding algorithm is provided. The checking system with secondary verification functions has been developed

which can assist the checking work of model maintainers.