Presentation Description: This study investigates the feasibility and relevant engineering details about enhancing the wind turbine gearbox. The goal is reducing the cost of the electrical parts and controls in a modern wind turbine by taking advantage of the controllability of a planetary gearbox. With some modifications in the structure and the way a wind turbine gearbox is employed, it is possible to divide its output into two shafts: A smaller shaft with a variable speed output and a larger shaft with a constant speed. Accordingly, two generators are run by the same gearbox. The advantage of this concept is that the main generator, taking a larger portion of the load, can be a cheaper machine. Only the smaller generator will be a DFIG or a synchronous generator, requiring converters. For example, a 3MW turbine does not need to have a 3MW generator with all its converters rated accordingly. If 2MW is provided by a squirrel cage machine, then only 1 MW is through a costly generator. Then if this latter is a DFIG, the electronics are to be rated for about 1/3 of MW. With the current technology the electronic converter of a DFIG needs to be rated for 1 MW.
Methodology: Interactive presentation, by asking questions from the audience.
Realize the long-term benefits of this concept
Understand the possible advancement of the technology
If the attendee is a manufacture of turbine or gearbox, s/he will
Feel the need/importance of more research and development
Be persuaded to explore the new possibilities