依托某330MW机组给水泵改造工程，针对国产机电一体化行星齿轮调速技术开展专项工程应用研究，通过系统解析该项技术的核心运行原理，明确其以行星齿轮差速原理为基础，集成变频调速技术实现无级调速，且具备“以小调大”的突出技术优势；经核算对比，在实现同等调速效果的前提下，该技术配套变频器配置容量较传统高压变频方案缩减80%，大幅优化了变频设备配置规格。同时，该技术采用专属功率分流结构设计，运行过程中绝大部分功率通过高效行星齿轮机构直接传递，仅小部分功率参与变频调速环节，依托该结构特性实现了极高的综合调速效率，经现场实地测试验证，系统实际调速效率稳定维持在92.92%~97.42%区间。此外，该技术搭载高可靠性容错运行机制，现场实测结果证实，即便出现变频器故障跳机的极端工况，整套调速系统仍可保持连续正常运行，可为锅炉给水系统提供额外安全保障，能够切实满足电力行业对关键辅机设备高可靠性、不间断稳定运行的核心要求。

Based on the feedwater pump renovation project of a 330 MW unit, this paper conducts a special engineering application research on domestic mechatronic planetary gear speed regulation technology. This technology is based on the planetary gear differential principle and integrates variable frequency speed regulation to achieve stepless speed regulation, featuring the prominent advantage of "regulating large power with small capacity". Compared with the traditional high-voltage frequency conversion scheme, the configured capacity of its matching frequency converter is reduced by 80% under the same speed regulation effect, optimizing the equipment specification significantly. Adopting an exclusive power-split structure, the technology transmits most power directly through the high-efficiency planetary gear mechanism with only a small portion involved in the variable frequency speed regulation link, thus realizing an ultra-high comprehensive speed regulation efficiency that stably ranges from 92.92% to 97.42% as verified by field tests. In addition, equipped with a highly reliable fault-tolerant operation mechanism, the whole speed regulation system can maintain continuous and normal operation even when the frequency converter trips due to faults, providing an extra safety guarantee for the boiler feedwater system and effectively meeting the power industry’s core requirements for high reliability and uninterrupted stable operation of key auxiliary equipment.