Direct drive wind turbines, also called as gearless wind turbines are wind turbines that do not have a gearbox. For the generation of power, the rotor shaft is connected directly to a permanent or synchronous magnet generator. Direct drive wind turbines generally utilize either synchronous generator system, which is electrically excited direct drive, or generator system, which is permanent-magnet excited direct drive depending on the location, cost as well as other restraints. Compared to geared wind turbines, less precautionary as well as break down maintenance is needed for direct drive wind turbines, and therefore are better options for offshore applications. Besides, maximum direct drive wind turbines contain less parts and are contactless. In comparison to onshore counterparts, for offshore farms, the maintenance and process is more costly. This eventually rises the complete dependability of wind farms and turbines. According to an ongoing study by Transparency Market Research, rise in demand for renewable energy is the driving factor for the growth of direct drive wind turbine market.
Singapore launches its First Long-span Wind Turbine
According to a recent news, in Semakau Landfill, a long-span wind turbine has been set out that which generates enough power for around 45 four-room HDB (housing and development board) units for almost a year. This took place due to Singapore’s push for fresh energy. From Lam Khin Yong’s (Nanyang Technological University’s acting provost, vice-president for research and chief of staff) point of view, the setting out of first wind turbine in Singapore’s is a great breakthrough in the nation’s promise in emerging region’s hygienic energy technologies. Furthermore, he adds that, as a prominent global university, Nanyang Technological University is delighted to support Singapore’s hard work in meeting its sustainability ideas in order to pave the way to a greener future.
The direct drive wind turbines are the first in NTU’s (Nanyang Technological University) REIDS (Renewable Energy Integration Demonstrator – Singapore) creativity, sponsored by the EDB (Economic Development Board) as well as NEA (National Environment Agency). The initiative that is managed by Nanyang Technological University’s ERI@N (Energy Research Institute), is being developed along with a French company named ENGIE and is also anticipated to interest projects of around S$20 million worth over the next 4years, in addition to the early S$10 million Semakau investment.
Working of Hybrid Microgrids
According to NTU, Renewable Energy Integration Demonstrator – Singapore intends to advance a number of hybrid “microgrids” that can produce the same energy requirements as that of 100 four-room of HDB flats. It eventually occupies about 9 soccer fields and over 64,000 sq. m of land. In -500 000 watts range, every “microgrid” generates power which is appropriate for small islands, emergency power supplies and remote residential areas. Evaluating 14 storeys high, every single turbine has 3 rotor blades of 10.5-metre long-span which produce an electrical output ranging of 100000 watt, and is very sensitive to produce power from wind speeds as little as 3m/sec to 20m/sec.
The Economic Development Board’s executive director of Cleantech, Goh Chee Kiong had mentioned that, the solid presence of foremost energy adopters and providers is an evidence to REIDS’ achievement in emerging an ecosystem to develop and pilot microgrid advances from Singapore. In the Singapore International Energy Week, 2017, 12 new partners would be signing MOUs (memoranda of understanding) with REIDS to progress the eventual deployment as well as the development of microgrid solutions in the region.
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