Alternative to Large Bladed Rotors

Abstract

Abstract—This document presents a utility-scale 16 MW multi-rotor wind turbine architecture intended as an alternative to single large-bladed rotor systems. The proposed design divides energy capture across four independent 4 MW rotor-generator quadrants, each using a permanent magnet synchronous generator, active rectification, and digital aggregation through a central high-voltage DC bus. This modular electrical synchronisation strategy reduces mechanical coupling, improves fault tolerance, and allows continued partial-capacity operation during quadrant-level faults. The design further integrates elliptical aerodynamic support arms, morphing trailing-edge surfaces, electric pitch and slew actuation, LiDAR-assisted model predictive control, thermal management, SCADA diagnostics, and black-start battery support. Particular attention is given to structural efficiency, aerodynamic drag reduction, lightning protection, electromagnetic isolation, and long-term fatigue performance. By replacing overscaled single blades with standardised rotor modules and digitally coordinated subsystems, the architecture aims to improve manufacturability, transportability, maintainability, grid compliance, and levelised cost of energy while preserving utility-scale generation capability.