巴拉水电站水轮机筒形阀全数字集成式电液控制系统方案对比研究

Comparative Research of the Fully Digital Integrated Electrohydraulic Control System for the Barrel Valve of the Water Turbine at Bala Hydropower Station

巴拉水电站水轮发电机机组具有单机容量大、运行水头高、河道水流中泥沙含量高等特点。由于蝶阀的性能限制(如受流体压力影响较大、阀门尺寸较大等),综合考虑各种相关因素,该电站选择筒形阀为电站主控阀。通过对比研究,以全数字集成式电液控制系统为基础研究开发筒形阀控制系统,通过离合器和链条传动实现筒形阀机械液压联动功能。该方案在各种工作条件下的性能,包括启闭时间、密封性能、阀门稳定性都优于其他方案。本研究为未来水电站的筒形阀控制系统选择提供了重要的参考资料,具有一定借鉴意义。

The turbine units of Bala Hydropower Station have the characteristics of large single unit capacity,high operating head and high sediment content in the river flow.Due to the performance limitations of butterfly valves and butterfly valves(such as being greatly affected by fluid pressure and valve size),and taking into account various relevant factors,the barrel valve is selected as the main control valve of the Bala hydropower station.This article conducts comparative research and develops a barrel valve control system based on a fully digital integrated electrohydraulic control system.The mechanical hydraulic linkage function of the barrel valve is achieved through clutch and chain transmission.The performance of this scheme under various working conditions,including opening and closing time,sealing performance,and valve stability,is superior to other schemes.This study provides important reference for the selection of barrel valve control systems in the future hydropower stations,and has certain reference significance.