火电厂生产工艺环节较多，任何一个工艺环节的节能降耗工作，其意义都是显而易见的，特别是在最近几年烟气脱硫系统投入运行后，这方面节能运行的潜力尚可发掘。在机组运行时保持锅炉炉膛负压不变的情况下，通过改变增压风机入口负压设定值，研究增压风机和引风机消耗的总电功率的变化趋势。最终得出在试验压力范围内，不同的机组负荷下，引风机和增压风机总功率消耗均随增压风机入口压力增大而降低的结论，为火电厂的节能降耗工作积累经验，并为运行调整指明方向。

There are many production processes in thermal power plant, and the significance of energy saving and consumption reduction is important for every process, especially flue gas desulfurization system. This paper studied the impact of entrance negative pressure of booster fan on the total power consumption of induced draft fan and booster fan with the same boiler furnace negative pressure in the unit operation process. The results show that the total power consumption of induced draft fan and booster decreases with an increase in entrance negative pressure of booster fan. The research results can accumulate the experience of energy conservation and consumption reduction for thermal power plants, and adjustment the direction for the unit operation.