基于LabVIEW的变速恒频双馈风力发电模拟监测系统

VSCF DOUBLY FED WIND POWER GENERATION IMITATION SUPERVISORY SYSTEM BASED ON LABVIEW

研究基于LabVIEW的变速恒频双馈风力发电模拟监测系统中的风场模拟、电压、电流畸变时的基波分量的获取以及有功、无功功率计算几个关键问题。针对Weibull分布的地域局限性,研究了实际风速4个基本特征(即基本风速、阵风、缓慢变化风速和噪声风速)的风速数学模型,并进行了基于LabVIEW的仿真;另外,通过基于傅立叶变换的锁相方法获得同步信号,进而得到基波分量,并采用了基于瞬时功率理论的功率计算方法,它比传统功率理论更适应于功率的实时监测,该监测系统利用LabVIEW软件实现了系统的有功、无功检测,并通过实测对比验证了该算法的正确性。

Some key issues were discussed for the VSCF doubly fed wind power generation imitation supervisory system based on lahview such as wind speed imitation, fundamental component detecting, active power and reactive power calculations. In addition, a wind speed model, including base wind speed model, gust wind speed model, ramp wind speed model and noisy wind speed model was established. Power calculations based on instantaneous power theory are more compatible than traditional power theory in real-time power supervision. A standard sin wave was derived from the original signal based on the Fourier transform, and the fundamental component was attained. The scheme proposed was implemented effectively in the VSCF doubly fed wind power generation imitation system.