基于SCADA数据的风力发电机发电性能指标评估

SCADA Data Based Evaluation of Wind Turbine Power Generation Performance Indices

为评估风力发电机主流的发电性能指标量化发电效率能力,需要从中选择一种指标作为服役质量监测的主要依据。首先以某风电场的SCADA历史数据为依据,应用统计分析方法对风力发电机主流发电性能指标(可用度、发电比例、负载率)的统计特征进行了分析比较;然后,从指标信息来源的角度解释了指标之间产生差异的原因;最后,结合异常运行数据比较了性能指标对于风速、功率曲线异常波动的敏感程度。结果表明,虽然发电性能指标表现出一定的一致性,但发电比例更能代表所有发电性能指标,并且能够更好地反映风力发电机的发电性能、体现风速-功率曲线的异常波动,在风力发电机主流发电性能指标中,发电比例更适合作为服役质量监测的主要指标。

To evaluate principal generating indices of wind turbine generator(abbr.WTG)to quantify the ability of generating efficiency,it is necessary to select an index from these indices as the principal foundation for the monitoring of the service quality.Firstly,on the basis of historical SCADA data of a certain wind farm and by use of statistical analysis method,the statistical characteristic of principal generation indices of WTG such as availability,power generation ratio and load factor were analyzed and compared.Secondly,in the viewpoint of the source of indicator information the cause of making differences among indices was explained.Finally,combining with abnormal operating data,the sensitivity of generation performance indices to abnormal fluctuations in wind speed-power curve was compared.Comparison results show that although the power generation performance indices exert a certain consistency,however the power generation ratio is more representat-ive for all power generation performance indices and can better reflect the power generation performance of WTG to incarnate the abnormal fluctuation of wind speed-power curve.Thus,as far as principal power generation performance indices of WTG,it is more suitable to use the power generation ratio for the principal index to be monitored.