Assessment of wind power capacity of Kemerovo Region

Wind is one of the most important elements of the climate. It influences many branches of national economy. It is one of perspective energy sources. For the decision of problems on estimation the wind power potential and its possible contribution in resource-saving and region ecology it is necessary to know about the wind characteristics distribution features in time and in a territory. The material for the research was the data of meteorological monthly journals (release 20, a part 2) at 21 stations of Kemerovo Region during 1966-2011. The analysis of the basic characteristics of the wind for the considered period has shown that at meteorological stations a reduction of mid-annual speed of the wind is observed. To reveal the tendencies of wind speed change the initial period was divided into two parts: 1) 1966-1990, 2) 1991-2011. For each part the average wind speed was calculated. Practically at all stations the average speed in the first period was greater than in the second. The change was from 1.1 times (Kuzedeevo) to 1.7 (Yurga). The exception was two stations: Ust-Kabyrza, the speed in the two periods is equal, and Kondoma where the wind is 1.1 times faster in the second period. Such a decrease in the speed of the wind has led to appreciable reduction of wind power resources. The calculation of the specific capacity of the wind stream was made by the cube of wind speed for the whole considered period (19662011), and for the last decade (2000-2011). The calculation was made by the cube of speed and by the formula considering the repeatability of wind speed gradation. The results of the calculations of the data from meteorological stations have shown that the size of specific capacity changes considerably. In Kemerovo Region the minimum average value of specific capacity was observed at Ust-Kabyrza - 1.0 watt/m x sec, maxima of mid-annual specific capacity were fixed at Yurga - 76.0 watt/m x sec, at Novokuznetsk - 67.7 watt/m x sec, Tisul - 61.1 watt/m x sec. Values of specific capacity observed in separate months reached the values of 687.5 watt/m x sec at Novokuznetsk, 737.0 watt/m x sec at Mariinsk, 616.0 watt/m xsec at Tisul, and 963.5 watt/m x sec at Yaya. The comparison of calculations by the cube of speed and by repeatability of speed gradation shows that the size of specific capacity calculated by repeatability of gradation at all stations exceeds the values received by calculating the cube of speed. The difference of values for Kemerovo Region can reach 83%. Thus, having considered the basic characteristics of the wind at the height of 10 - 14m at meteorological stations of Kemerovo Region, it is possible to draw the following conclusions: the estimation of wind power resources by the data from meteorological stations shows that the use of wind-mills of low power is possible only in transition periods - April, May, October, November; the use of wind-mills of average and big capacity is unpromising; considering the instability (daily, seasonal, weather) of wind energy supply, it is possible to use it only as an additional source of electrical supply.

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