Marine renewable energy has considerable resources in the world’s future energy system. Marine renewable energy attracts many developers and researchers around the world aimed reducing carbon emission and enhancing blue economy. To promote the development of marine renewable energy, its devices need to endure facing aggressive and corrosive marine environment. Corrosion is an important issue in marine environment. Corrosion can cause structural deterioration in the main component structure of marine renewable energy devices, such as turbine. Corrosion has been studied for many years, and this paper focuses to review about the most possible types of corrosion, factor affecting corrosion, method of corrosion identification, and corrosion presence in marine renewable energy device. Study work in corrosion of marine renewable energy is recommended in order to assess failure and increase the lifetime of marine renewable energy device itself.
Department of Ocean Engineering, Faculty of Marine Technology, Institut Teknologi Sepuluh Nopember (ITS), Surabaya, Indonesia
Department of Naval Architecture and Shipbuilding Engineering, Faculty of Marine Technology, Institut Teknologi Sepuluh Nopember (ITS), Surabaya, Indonesia
Solar PV has unique characteristic called maximum power point (MPP). This MPP will always changed depend on sun light intensity and electrical characteristic of the load. To maintain MPP of solar PV, external device is needed such as DC DC converter. Most of DC DC converters are using boost converters or buck-boost converters nowadays, but they has limitation power transfer rate (typically double). This paper discuss three phase DC to DC converter to achieve MPP of 67V solar PV for charging 300V battery pack. Pertube and Observe (P&O) method was used to control the switching and to maintain MPP of solar PV by sensing the output voltage and the output current. As the result, this DC DC converter was able to step up the voltage from 67V to 300V and nominal charging current is 0.7A. In the other hand, the MPP of solar PV can reached up to 260 WP. The effectiveness of the proposed method was proven in PSIM simulation.
Department of Electrical Engineering, Politeknik Elektronika Negeri Surabaya, Indonesia
Department of Electrical Engineering, Politeknik Negeri Batam, Indonesia
