Identification method and system for fan power characteristic curve

The invention relates to an identification method and system for a fan power characteristic curve. The identification method comprises the steps of determining a fan operation data envelope line according to the actually measured fan operation data; and identifying the fan power characteristic curve based on the fan operation data envelope line through a genetic algorithm. According to the identification method, the actual operation power curve of the fan is generated based on the actual operation power data of the fan; meanwhile, the fan operation power curve subsections and the genetic algorithm are adopted, so that the conformity between a fitted curve and the actual curve can be greatly improved; and therefore, the obtained fan power characteristic curve can reflect the fan characteristics more accurately. 本发明涉及一种风机功率特性曲线的辨识方法及系统。该辨识方法包括：根据实际测得的风机运行数据确定风机运行数据包络线；基于所述风机运行数据包络线利用遗传算法辨识风机功率特性曲线。本发明基于风机实际运行的功率数据生成风机的实际运行功率曲线，采用风机运行功率曲线分段和遗传算法计算，可以显著提高拟合曲线与实际曲线的符合度，使求得的风机功率曲线能更加精确地反应风机特性。