Development of a simple power controller for horizontal-axis standalone tidal current energy generation system

Yongjun Dong, Yang Zhao, Wanqiang Zhu, Xueming Zhang and Jingfu Guo

International Journal of Global Energy Issues, 2017, vol. 40, issue 1/2, 117-127

Abstract: Tidal current energy, which is one of the most predictable forms of ocean renewable energy, is mainly utilised for electricity generation. This paper presents a simple control strategy for an optimal extraction of output power from a horizontal-axis variable speed tidal current turbine generation system with a permanent magnet synchronous generator (PMSG) that is driven directly by a fixed-pitch turbine. The maximum power point tracker (MPPT) extracts the turbine's maximum power from cut-in current velocity to rated value by measuring only dc link parameters. Together with a dc-dc converter PWM controller, MPPT variable-step searching algorithm is modelled and simulated using Matlab/Simulink software. The simulation results indicate that the variable-step searching algorithm can effectively track the maximum power point without collecting the data of tidal current velocity or rotor speed. Such MPPT controller provides a simple and practical method for the maximum power control of standalone tidal current energy conversion system.

Keywords: tidal current energy generation; direct-driven PMSG; permanent magnet synchronous generator; maximum power point tracking; MPPT algorithm; PWM controller; pulse width modulation; modelling; simulation; power control; tidal energy; tidal power; wave energy; wave power; horizontal axis turbines; variable speed turbines; variable-step searching; controller design; energy conversion systems. (search for similar items in EconPapers)
Date: 2017
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Citations: View citations in EconPapers (1)

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