Sizing High Speed Micro Generators for Smart Grid Systems

This chapter presents a step by step sizing procedure of High Speed Permanent Magnet Synchronous Generators (HSPMSGs) for smart grid applications to be driven by micro-turbines. The final design offers significant reductions in both weight and volume in a power range of 5-500 kW. A rotor length to diameter ratio is used as an important design parameter. The results are depicted by 3D plot figures for sizing of a number of machines. The simulation of generators sizing is performed using MATLAB. Then; it proposes the optimized sizing of (HSPMSGs) for the same applications. Unconstrained minimization for total losses; constrained optimized total mass with bounded constraints is introduced; a genetic algorithm is formulated for efficiency maximization; in the second genetic problem formulation, attempt is made to obtain minimum mass machine sizing that is constrained by the non-linear constraint function of machine losses; and finally, an optimum torque per ampere genetic sizing is predicted. For all optimization processes, three optimizing variables are selected. The optimized and genetic results are depicted in three-dimensional figures for initial and detailed sizing. The simulation of generator sizing is performed using MATLAB Optimization Toolbox and its Genetic Algorithm. Finally, six analytical design example comparisons are introduced with study of rotor losses.

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