摘  要：通过前置泵改造前后运行数据及前置泵未改造失败案例，分析锅炉电动给水泵变频改造前置泵为何要改造，阐述前置泵定速运行是电动给水泵全工况变频调节的充要安全措施。

关键词：前置泵；给水泵汽蚀；变频调速；给水系统失稳

Abstract: Through the booster pump to transform data before and after operation and the booster pump failure case, analysis of the boiler feed water pump frequency conversion electric transform why booster pump, booster pump constant speed operation is the electric feed water pump of the inverter control of all condition to security measures.

Key words: Boo