MUMBAI, India, Aug. 17 -- Intellectual Property India has published a patent application (202641096143 A) filed by Rajalakshmi Engineering Coloege on August 08, 2026, for Digital Twin And Edge Artificial-Intelligence-Based Differential Relay For Power Transformer Protection.
Inventors include Dr. P Sivakumar; and Arokiya Prasad P.
The application for the patent was published on August 14, 2026, under issue no. 33/2026.
Abstract: A differential protection relay (87T) and method for electric power transformers combine a physics-based digital twin with an on-device Edge-Artificial-Intelligence classifier to overcome the long-standing limitation of fixed second-harmonic-restraint relays, which mis-operate on modern low-loss cores and on current-transformer saturation. A sampling front-end acquires per-phase terminal currents through current transformers; a physics engine computes differential and restraint currents and extracts harmonic, unsaturated-segment and higher-order statistical features. A physics-based digital twin maintains a continuously re-calibrated real-time model of the transformer — its magnetizing branch, leakage reactances, saturation curve and tap position — and adaptively shapes a dual-slope operating characteristic to the live operating state, thereby securing the relay against magnetizing and sympathetic inrush, over-excitation and external faults with current-transformer saturation while preserving sensitivity to genuine internal winding faults. A quantized multilayer-perceptron inference core executes in real time on a resource-constrained microcontroller such as an Arduino-class, STM32 or ESP32 device, classifying each event without cloud dependence. A decision-fusion logic authorises a trip only upon concurrence of the adaptive physics/twin criterion and the Edge-AI classification, simultaneously raising dependability and security. An embedded Processor-in- the-Loop interface exchanges six-byte frames protected by an eight-bit cyclic-redundancy check with a host simulator, enabling identical firmware to be exhaustively validated against simulated fault and inrush scenarios before commissioning and re-verified in the field. The relay is portable across multiple embedded platforms and operable in simulation or live mode, delivering a self-adapting, locally intelligent and inherently verifiable transformer protection relay. FIG. 1 is the accompanying figure.
Disclaimer: Curated by HT Syndication.
