At the core of a modern substation lies the protection relay: an intelligent electronic device (IED) that plays a critical role in maintaining the stability of the power grid by continuously monitoring voltage, current, frequency, and phase angle. Therefore, a study on the safety reliability evaluation method of intelligent operation and maintenance of converter stations based on situation awareness of relay protection devices is proposed. After building the converter station control structure model around the outer ring control structure. SIPROTEC 5, built on extensive field experience, offers comprehensive functionalities and device types for modern electrical energy systems. Its modular design and powerful DIGSI 5 engineering tool provide tailored solutions. This tool gives a quick guidance to find a SIPROTEC 5 protection relay. Synchrophasor technologies are being rapidly deployed to provide high-speed, high-resolution measurements from phasor measurement units (PMUs) across the transmission systems as a tool for monitoring and post fault analysis which may lead to real-time control using PMU data in near future. Effective relay protection depends on. Numerical relays are based on the use of microprocessors. A big difference between conventional electromechanical and static relays is how the relays are wired.