VAlue proposition
Distributed renewable energy sources (DREs) have emerged as a preferred alternative to traditional power grids, offering significant environmental benefits, enhanced power reliability, and cost-effective generation. However, integrating DREs into microgrids presents several challenges for protection systems, such as variable output, low fault current contributions, lack of inertia, and dual operational modes. To overcome these limitations, a communication-assisted protection scheme based on a state-observer-assisted digital relay, specifically designed for high-penetration, inverter-based distributed resources is useful.
Description of Technology
This technology is a digital protection relay designed for reliable fault detection and isolation in modern microgrids. It uses a continuously operating state observer to generate zone‑specific residuals that are evaluated alongside phase‑voltage continuity and circuit breaker status using a logic‑based decision framework. This approach enables accurate, selective, and fast protection across multiple zones while minimizing false trips under both grid‑connected and islanded operating conditions. This digital relay technology delivers highly reliable and selective protection for modern microgrids, addressing the critical challenges introduced by high penetration of inverter‑based and distributed renewable energy resources. Its logic‑based, communication‑assisted design ensures dependable performance under both grid‑connected and islanded conditions, even in low‑fault‑current and highly dynamic systems. Built on an IEC 61850–compliant communication framework the technology offers utilities and microgrid operators a robust, interoperable, and future‑ready protection solution.
Benefits
Applications
IP Status
Patent pending
LICENSING RIGHTS AVAILABLE
Full licensing rights available
INVENTORs: Joydeep Mitra and Saad Alzahrani
Tech ID: TEC2026-0019