The wind power energy has been suggested as alternative energy source because it is economically more feasible than other alternative energy technologies. The size of commercial wind turbines has dramatically increased to improve their energy conversion efficiency. The wind turbine blade loads become more important as the wind turbines increase in their size. The modern large-size wind turbine blades generally use sandwich structures and thick laminates to withstand the aerodynamic loads. And the biplane blade design was proposed to use a biplane inboard region to improve overall performance of large blades. The individual pitch control (IPC) facilitates structural load reduction without blade shape alteration. Active flow control methods, such as trailing-edge flap, adaptive compliant wing, micro-tab, have been proposed as viable and effective devices for active load control applications. In order to alleviate the wind turbine blade loads, various researches are under going.

The Korea Institute of Energy Research (KIER) provides the web service of the New-Renewable Energy Resource Map (www.kier-atlas.org), which offers comprehensive information for new-renewable energy resource assessment based on the Geographical Information System (GIS). In order to shift a development framework of map content from supply-push to demand-pull, a demand survey was conducted targeting KIER, an expert group in the new-renewable energy field. Firstly, ideas of new map content were derived from an in-depth interview survey targeting the specific researchers who are willing to use a new-renewable energy resource map to their research projects. Secondly, a web-based survey was carried out targeting all researchers in KIER to evaluate the political, business and research importance, ease and difficulty of the proposed map contents, and its necessity and availability. Finally, an Importance-Performance Analysis (IPA) was performed to identify the high-priority, urgently needed thematic maps, which were chosen as a building-integrated solar thermal map and a suitability map for wind farm development.

The aerodynamic performance of the MW size wind turbine was studied by the wind tunnel test with scaled down model. The radius of the real scale blade was about 56 m and the corresponding Reynolds number at the blade tip was 3.6×106. The scaled down model used in wind tunnel test has a 1.1 m radius and the maximum Reynolds number achievable in the wind tunnel test was 0.1×106. The aerodynamic characteristics of the scaled down model by the Reynolds number was studied experimental method and computational method. The Reynolds number effect on the aerodynamic performance of the blade from 0.8×106 to 1.1×106 was tested by changing the rotational speed of the blade from 700 RPM to 900 RPM. The test results show that the power coefficient at 700 RPM was quite low and collapsed by comparison with the results at 800 RPM and 900 RPM. The wake measurement results show that there was a stall in the middle sections of the blade and this made the Cp collapse. The BEMT analysis for the scaled down model and real scale model were conducted and the correlation equation was induced from those results. The aerodynamic performance of the MW size wind turbine blade was estimated from the wind tunnel test results of the scaled down model with this correlation equation.

To define the generic simulation model for wind power generation system, International Electrotechnical Commission(IEC) is preparing international standards. The generic model speeds up the simulation and decreases the time for the assessment analysis. This paper introduces the new international standard of IEC 61400-27-1. And it is explained the power control of type 4, which is connected through a full size converter. According to the standard, simulation model is developed using Matlab/Simulink. A sample 2 MW turbine parameters are used for simulation results. The validation for simulation model will be executed by comparison of the field test.