CAJ | 학술논문

为了对风资源进行准确有效的评估，对风切变指数这一重要参数进行了分析研究。根据风切变指数关系式，给出5种不同的方法分别计算风切变指数；然后根据计算得出的风切变指数与幂律公式推算已知高度的风速，再利用不同计算方法得出的结果与实测风速进行对比分析，选择误差最小的计算方法进行计算，得到较为准确的风切变指数。选用内蒙古乌兰察布市某测风塔共3个测风高度一年内完整的实测数据为例，采用上述方法计算该地区风切变指数，结果表明由于地面粗糙度和地形等因素的影响，不仅不同地区的风切变指数是不同的，即使是同一地区同一时间段的风切变指数也是不同的；因此，在进行风能资源评估时，应结合风电场的实际情况综合采用这5种方法，选取误差最小的风切变指数。
위료대풍자원진행준학유효적평고，대풍절변지수저일중요삼수진행료분석연구。근거풍절변지수관계식，급출5충불동적방법분별계산풍절변지수；연후근거계산득출적풍절변지수여멱률공식추산이지고도적풍속，재이용불동계산방법득출적결과여실측풍속진행대비분석，선택오차최소적계산방법진행계산，득도교위준학적풍절변지수。선용내몽고오란찰포시모측풍탑공3개측풍고도일년내완정적실측수거위례，채용상술방법계산해지구풍절변지수，결과표명유우지면조조도화지형등인소적영향，불부불동지구적풍절변지수시불동적，즉사시동일지구동일시간단적풍절변지수야시불동적；인차，재진행풍능자원평고시，응결합풍전장적실제정황종합채용저5충방법，선취오차최소적풍절변지수。
In order to accurately and effectively assess the wind resource ,this paper analyses and studies an important parameter - wind shear exponent .According to wind shear exponential formula , the wind shear exponent is calculated by five different methods ;then calculates the known height's wind speed according to the calculated wind shear exponents and power law formula ,and chooses the smallest error calculation method by comparing the calculated value and actual value ,to obtain more accurate wind shear exponent .With the example of actual wind speed data ,within a complete year on three wind measurement height at a mast of Wulanchabu in Inner Mongolia ,the wind shear exponent of this area is calculated using the above methods ,the results show s that :due to the impact of ground roughness and the topography ,not only wind shear exponents are different in different areas ,they are also different even in the same area at the same time ;when wind resource assessment ,therefore , should be combined with the actual situation of wind farm ,and use these five methods comprehensively to choose the smallest error wind shear exponent .