Design optimization of tri core PM linear generator using SA and FPA for wave energy conversion system in south coast of Java Island

Abstract

Due to the significant high waves which usually occurred, the south coast of Java Island has a huge potential of ocean waves energy which can be used to generate electricity. Converting ocean waves energy using permanent magnet linear generator (PMLG) can replace linear to rotational motion converter usage which has large mechanical power losses. However, high power losses in the PMLG's winding can occur if it is not optimally designed. This paper presents optimization methods for designing tri core PMLG with low power losses in the winding. The objectives function are derived from a magnetical model of linear generator. To obtain the best design, simulated annealing (SA) and flower pollination algorithm (FPA) with several variables and constraints is performed. The power losses in the winding of PMLG were ideally minimized using both methods. Optimization results from SA method were compared with the results from FPA. Based on the simulation, each method had that own characteristic to find the global optimal solution, including each variables value, objectives function value, and execution time.