风电损失功率分析

An Analysis on Power Loss of Wind Power Generation

本文首先参考空气动力学相关知识并结合Box-Cox变换将风电功率残差转换为服从正态分布的数据,并基于正态假设对风机的状态进行基本划分,得到了停止状态、待机状态、满发功率状态、正常状态和异常状态这五个基本状态,并进行了风电状态的占比分析。基于功率曲线本文对风电功率的环境影响因素进行了深入分析,肯定了外界温度对风机的重要影响,并在考虑温度因素的条件下拟合出理想条件下的功率曲线,并与实际功率曲线进行对比,用以实现风电的损失功率分析,最终评估出本文所研究风机的功率利用率约为79.98%,并对损失功率分析得知风机通过及时的维修和合理的维护可避免约5.99%~12.28%的功率损失。

Firstly,we combined the aerodynamic-related knowledge with the Box-Cox transformation to transform residuals of wind generator data to obey the normal distribution.Based on the normal assumption,we divided the wind generator into five basic states:stop state,standby state,full power state,normal state and abnormal state.Then we analyzed the proportion of these five basic states.Based on the power curve in this paper,we analyzed the environmental influence factors of wind generator and affirmed the importance of ambient temperature around the wind generator.In considering the temperature factors,we fitted the power curve under ideal conditions,and comparing this with the actual power curve,we successfully calculated the loss of wind power analysis and the final evaluation of power efficiency of wind generator is about 79.98%.We can draw a conclusion that by timely and reasonable maintenance the wind generator can reduce power loss by 5.99%~12.28%.