With the development of the distributed technology

field-bus technology and Web technology

the online monitoring information system of transformer substation has evolved from the original decentralized system to the present centralized system. But due to the different types of online monitoring units

and time asynchronous to carry out the monitoring

there is no unified planning

and lack of coordination in each transformer substation. The present system does not play its due role. Through the hierarchical structure design for online monitoring information system

constructing the integrated information network

unified processing data from monitoring acquisition units. This system integrates the data information and assesses the equipment condition

and reports the processed data in a unified interface. It realizes the promotion of technical support and technical service level in power service company

and improves the intelligence level of the transformer substation. This system can provide basic online monitoring and status evaluation related applications for provincial companies and urban power bureau.