∶文中论述火力发电厂引风机节能的一般措施，并结合工程实际，对变频调速与小汽机调速进行经济比较。通过经济分析，两种调速方式的经济性优势会随外部边界条件变化而变化。建议同类工程在选择节能方案时，需要综合考虑电厂后期的外部边界条件，并进行评估。%The paper makes an introduction to the general energy-saving measures of induced draft fan in thermal power plant, and an economic comparison is made between variable-frequency speed governing and small turbine speed governing combined with the actual project. Through economic analysis,the economic advantages of two speed governing modes change with the external boundary conditions. It is suggested that the similar projects shall take comprehensive considerations of the future external boundary conditions and conduct economic evaluations during selecting of energy-saving schemes.
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