龙羊峡水电站在低水头下保证机组安全运行的措施及对策

Measurement and Treatment of Ensuring the Unit's Safe Operation in Longyangxia Hydraulic Power Plant under Lower Water Head

龙羊峡水电站是西北电网的第一调峰、调频电厂 ,目前龙羊峡水库水位已降至极限死水位附近。文章阐述了低水头对发电厂设备、厂用电、全网稳定等造成的不同程度的影响及对机组的工况、出力、效率、运行寿命等带来的负面影响 ,同时简述了为防止机组振动加大、过流部件气蚀加剧、厂用电可靠性降低应采取的预防措施。

Longyangxia hydraulic power plant is the first peak and frequency modulation plant among the West-north power net. Its water level have been decreased near the deadline for the moment,the paper proposes the influence of lower water head on the equipment and the whole power net's safe operation,also expounds its ill effect on the unit's efficiency and operation life etc. Also proposes the solving method of avoiding the unit oscillation increasing and the power reliability decreasing etc.