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The emergency shutdown device of the hydro-generator governor should not only meet the requirements of "power loss action" in the 25 anti-accident measures, but also avoid the hidden danger of unplanned outage of the unit caused by the electromagnetic valve coil of the device being charged for a long time and easy to burn. This paper introduces three generations of technical improvement of the emergency shutdown device of hydro-generator governor of a large hydropower station, from double electromagnet two-position solenoid valve, single electromagnet spring return two-position solenoid valve to double solenoid valve and linkage valve, expounds their working principle and compares their respective advantages and disadvantages. It is proved that the emergency stop device of hydro-generator governor based on double solenoid valve and linkage valve is a practical and reliable emergency stop control optimization scheme of speed regulating system, which has great popularization value in hydropower plants.

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水轮机调速器紧急停机装置既要满足二十五项反措中“失电动作”的要求，又要避免装置电磁阀线圈长期带电易烧损带来的机组非计划停运隐患。介绍了某大型水电厂水轮机调速器紧急停机装置从双电磁铁两位电磁阀、单电磁铁弹簧复位二位电磁阀到基于双电磁阀搭配联动阀的三代技术改进历程，阐述其工作原理，对比其各自优劣。证实基于双电磁阀搭配联动阀的水轮机调速器紧急停机装置是实用可靠的调速系统急停控制优化方案，在水电厂极具推广价值。

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钟永（1979-），男，硕士、高级工程师，研究方向为水力发电生产技术，E-mail：zhong_zy@wldl.com.cn

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钟永（1979-），男，硕士、高级工程师，研究方向为水力发电生产技术，E-mail：zhong_zy@wldl.com.cn

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