水轮发电机组过速保护系统设计方案研究

摘要

水轮发电机组过速保护系统主要是由事故配压阀和纯机械过速保护装置组成. 在机组发生过速时,机组的过速保护系统会按照设计流程准确动作、及时关闭导叶接力器,以使机组停机,避免水轮发电机组发生飞逸现象. 因此,过速保护系统设计方案质量的优劣,直接关系到机组运行的安全. 结合瀑布沟和深溪沟2座水电站水轮发电机组过速保护系统的实际应用情况,以及过速保护系统的设计原理,推荐了一种能适合大中型水轮发电机组过速保护系统的设计方案,以便为大中型水电站机组过速保护系统的设计或升级改造提供参考与借鉴.%The overspeed protection system of hydro-generator unit is mainly composed of emergency distributing valve and purely mechanical overspeed protector. When the generator unit runs over the speed limit, the overspeed protection system will operate accurately according to the designed procedures, close the guide vane servomotor immediately, and shut down the unit to avoid runaway of the unit. Therefore, the quality of the design schemes of overspeed protection system is directly related to the safe operation of the unit. In combination of the application of the overspeed protection system of hydro-generator units in Pub-ugou Hydropower Station and Shenxigou Hydropower Station, a design scheme of overspeed protection system suitable for medium and large hydro-generator units is recommended according to related design principles of overspeed protection system to provide reference for the design and improvement of the overspeed protection system of medium and large hydro-generator units.