Efficient Explicit Method for Representing Saturation of Synchronous Machines Using 2-D Lookup Tables

Synchronous machines are widely considered in power generation, electric propulsion, and industrial automation due to their precise control and operational stability. Accurate modeling of synchronous machines is vital for advancing electrical engineering applications. Traditional machine models often struggle with computational challenges due to the nonlinear characteristics exhibited by the machines, such as magnetic saturation. Conventional methods of including magnetic saturation in models lead to high computational costs and significantly increased simulation times. This paper improves the recently proposed explicit flux correction (EFC) method for salient-pole synchronous machines that incorporates main flux saturation using two-dimensional lookup tables (2D-LUTs), which reduces algebraic computations and enhances simulation speed. The proposed model is compared with existing state-of-the-art EFC models and commercial tools such as Matlab/Simulink's Simscape Electrical Specialized Power Systems (SPS) toolbox. The simulation studies demonstrate the advantages of the proposed 2D-LUT model, which significantly reduces the computational cost while achieving similar accuracy and representing improvement over the existing models.