The electricity consumption of axial IDF and FGD booster fan in 300 MW units of a Henan power plant was huge. To gain the best energy-saving retrofit scheme, the necessary of retrofit was confirmed by analyzing the operation characteristics and operation optimization test. The IDF and FGD booster fan energy-saving estimate of some scheme was carried out by fan operation characteristics test. By analyzing technical economic, difficulty and reliability, frequency conversion retrofit for IDF was fixed to be the best scheme. FGD booster fan was suggested not to retrofit. This scheme has finer energy-saving effect, and the difference between the estimate value and real value of energy-saving is very small. The energy saving estimate, based on operation characteristic test, is quite accurate and can avoid some unfavorable situations possibly occurred in frequency conversion retrofit.%河南某厂300 MW机组轴流式引风机、增压风机总体耗电较高,为寻找最佳节能改造方案,通过运行特性和运行优化试验分析确定了进行改造的必要性.针对几种拟订方案,基于风机运行特性试验分别进行了引风机、增压风机节能评估.通过技术经济、改造难度、安全性等比较,确定引风机变频改造为最佳方案,增压风机不建议改造.改造方案实施后节能效果良好,与节能评估预测节能最非常接近.这种基于运行特性进行的节能评估有较高的准确性,能避免风机变频改造中可能发生的几种问题.
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