METHOD FOR CALCULATING ENERGY CHARACTERISTICS OF SEA WAVE ENERGY CONVERTER DURING WAVE OSCILLATION PERIOD

Abstract

The use of efficient and environmentally friendly methods for electricity generation is one of the main concerns in the field of energy. The advantages and disadvantages of wave energy power plants are well-known and continuously researched. There are many approaches and methods for converting wave energy into electrical energy, each with its own advantages and disadvantages, designed for different converter constructions and utilizing various approaches. This article presents a simple converter scheme that converts the energy of cylindrical buoy oscillations into electrical energy. The aim of this work is to develop a methodology for calculating the energy characteristics of this wave energy converter, consisting of a cylindrical buoy, a pulley, and a magneto-electric generator, using the average energy indicators of the generator. The proposed converter scheme utilizes a single cylindrical buoy and a three-phase generator with resistors as the electricity consumer. The sea surface oscillation is represented by a sine wave with higher harmonics. The balance equation of forces acting on the buoy is formulated, taking into account the ratio of the moment on the rotor to its speed. An iterative calculation is used to determine the optimal rotor speed to maximize electricity consumption power. To establish the resistor's resistance, the steady-state operation modes of the generator and the average optimal rotor speed over the period of the sea wave are used. The generator is then modeled with an optimal resistor resistance and a specified variable rotor speed over the wave period. The energy absorbed by a single buoy, with a wave amplitude of 1 meter and a period of 10 seconds, is studied. Ref. 16, fig. 10.