Water turbine natural air supply method based on stability index of water turbine generator set

The invention discloses a water turbine natural air supply method based on a water-turbine generator set stability index, and belongs to the field of hydroelectric generation. The electromagnetic valve and the gas mass flow meter are arranged in the main shaft center hole of the main shaft, whether the water turbine needs to be subjected to natural gas supplementing operation or not is automatically judged through vibration of the top cover of the water-turbine generator set and changes of the main shaft throw value, and optimization operation of the natural gas supplementing action of the water turbine is completed through opening and closing actions of the electromagnetic valve; finally, the purpose of ensuring safe and stable operation of the unit through natural air supply is achieved. 一种基于水轮发电机组稳定性指标的水轮机自然补气方法，属于水力发电领域。本发明通过在主轴的主轴中心孔内设置电磁阀和气体质量流量计，利用水轮发电机组顶盖振动和主轴摆度值的变化，自动判定水轮机是否需要进行自然补气操作，并通过电磁阀的启闭动作，完成水轮机自然补气动作的优化操作，最终实现通过自然补气保证机组安全稳定运行的目的。