Design of general protocol transformer based on "observer pattern"

A design scheme of general protocol transformer is proposed based on distributed C/S(Client/Server) architecture,in which different protocol transform nodes are treated as virtual clients and the data repeater center as server.The data transfer is based on the "observer pattern" and the "push/pull" mode is applied to raise the data transfer efficiency.The data structure for transforming the traditional protocols to IEC61850 protocols is proposed.The communication program is developed only once for one kind of protocol transform node to save the cost and improve the efficiency.The proposed scheme is applied in several typical substations,which verifies its versatility and validity.