Evolution of communication mode bases on IP in power system

This paper introduces the data network communication modes based on IP, including IP over ATM,IP over SDH and IP over WDM/Optical. Considering the higher requirement for security, real-time and reliability in power system communication network, the paper evaluates these modes comprehensively from services supporting capability, transmission speed,self loop back,networking and economic aspects. It also discusses their applications in power system and development trends of power communication.