User:Mmh-duke/sandbox

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রুয়েট এর লোগো ঠিক কোন কারনে সাদাকালো ভার্সন ব্যবহৃত হয়েছে বোধগম্য হল না। আমি পরিবর্তন করে ইংরেজি উইকির রঙিন লোগোটাই সেট করে দিলাম। কোন কারন থাকলে জানাবেন। --Mmh-duke (talk) 11:26, 26 October 2015 (UTC)

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[mine] ==== Wind, a renewable and green energy, has been an important source of electrical power in some developed countries recent decades. As the wind generated electric power penetration to the grid is raising, the concernation of riliabilty and stabilty of this system is being increasing. In developing countries like Bangladesh, the demand of electrical energy is becoming high and high. Bangladesh being a tropical country, there are some windy locations in which wind energy projects could be feasible though the speed of wind fluctuates unpredictably. However good wind power generation sites are usually located in distant from populated or industrial area or the grid. for off grid operation, Power storing to some batteris can be a solution in that case, however it is not efficient to carry battery for power. A recent popular medium for storing energy Hydrogen can act as energy career as this is used in fuel cell. It can be used in grid connected wind turbine generation system as well. As wind turbine output is proportional to the cube of wind speed, the wind turbine generator output fluctuates due to wind speed variations and highly variable at several different timescales from hour to hour, daily, and seasonally, can have an influence on the power system stability.

This thesis work demonstrates a combined control system for grid connected Doubly Fed Induction Generator (DFIG) based wind turbine and few water electrolyzers connected to the output of this wind turbine. DFIG is getting popularity for modern high power and variable speed wind farms which can be controlled using the con. Renewable hydrogen is a modern concept to minimize the cost of production of hydrogen, which is usable in fuel cell. The abundant wind energy can be used to produce hydrogen by electrolysis of water. As the wind speed is fluctuating in nature, the output power is also fluctuating which can cause serious trouble in power system operation. Constant output power reference is not a good choice because there can be some cases where wind speed is very low and then sufficient power cannot be obtained. Reference power for the blade angle of each wind turbine is calculated by using proposed central supervision control system based on wind speed data. In proposed system the grid and the electrolyzers share the generated power from the DFIG in such a way that the output fed to the grid is smoothed. Again as the water electrolyzers should not be operated in fractional power and to maintain average operation cycle for each unit to maximize their longevity, proper switching is necessary. Thus a new switching control technique is also proposed. Performance of the system and production of Hydrogen from the electrolyzers has been simulated and analyzed using PSCAD™ software with the real wind data, which are measured in Hokkaido Island, Japan.

It can be concluded that using this methods the output power fluctuations of the system can be maintained smooth. And in parallel with the system Hydrogen can be produced from the redundant supply of wind power after providing the needs in the grid as well as the longiviety of the electrolyzers can be incresed.