Numerical relays, multi-function relays, communication-based protection schemes, and advanced fault analysis techniques have revolutionized relay protection, enabling faster fault detection, precise fault location, and adaptive protection strategies. able sources such as wind and solar. These clean energy sources, connected through inverters and flexible transmission systems, are transforming traditional grids based on synchronous generators into more flexibl cant challenges to system stability. Nowhere is that clearer than in the challenge to. Relay protection plays a critical role in ensuring the reliable operation of electrical power networks, both in transmission and distribution systems. Over the years, several innovations have been introduced to improve the effectiveness and efficiency of relay protection schemes. This paper explores various aspect. This paper presents a chip-based relay protection technology based on system-on-chip (SoC), which is described from four aspects, namely, the architectural design of the relay protection SoC, software and hardware cooperative relay protection based on the SoC IP core, experimental verification, and. Relay protection systems are designed to detect and isolate faults within the electrical network, preventing damage to equipment and ensuring the continuity of power supply.