大型凝结水泵采用永磁调速与高压变频技术改造效果比较

近年来，凝结水泵高压变频改造方兴未艾，永磁调速这项新技术也开始得到广泛关注。通过对永磁调速和高压变频这两种凝结水泵改造技术的改造效果进行比较，为大型凝结水泵节能改造技术的选择提供参考。结合实际运行及调研情况，选择两个机组类型、容量、运行年限相近的电厂，对永磁调速和高压变频技术在凝结水泵实际节能改造中的节能效果、经济性、可靠性、投资收益等指标进行分析。结果得出：对于大型凝结水泵节能改造，在可靠性方面永磁调速技术优于高压变频技术；在节能效果和投资收益方面高压变频技术优于永磁调速技术。

Comparative Study on Effects of Large Condensate Pump Improvement with Permanent Magnet Speeding and High-Voltage Frequency Conversion Technologies

In recent years, the condensate pump improvement with high-voltage frequency conversion technology has been in fast-growing, and the new technology of permanent magnetic speeding is getting increased attention. In this paper, the comparative study on the effects of condensate pump improvement with permanent magnet speeding and high-voltage frequency conversion technologies is conducted to provide a reference for technical selection in the large condensate pump improvement. According to the practical operation and research, two power plants with units of similar unit type, capacity and operational lifespan are selected to analyze the energy saving effects, economic performance, reliabilities and investment benefits of the improvement. The study concludes that in the improvement of large condensate pumps, the permanent magnetic speeding technology outperforms the high-voltage frequency conversion technology in terms of reliability, while in the aspects of energy saving and investment benefits, the latter one outgoes the former one.