The existing communication protocols based on IEC 61850 Ed 1. 0 for protection information between substation and control center lack the clear standard support. The communication between substation and dispatching center is studied in IEC 61850-90-2

and a theoretical basis for protection information transmission is provided. This paper analyzes the existing status of protocol based on IEC 61850 Ed 1. 0 and the information requirement for substation of IEC 61850-90-2. Meanwhile

the method of communication and modeling strategies are compared and optimized. The results show that the proxy/gateway nontransparent indirect access and imagine modeling are more suitable to the application requirements of protecting the information transmission in IEC 61850 Ed 2. 0. At the same time

the existing communication protocols based on IEC 61850 Ed 1. 0 can meet the requirements of IEC 61850 Ed 2. 0 with additional services and conventions. Based on the above research

this paper puts forward the protection information transmission scheme based on IEC 61850-90-2. Also

combining with the engineering practice

the implementation such as information delivery and log service is given.