大型水轮机组减压阀系统不稳定性分析及改进研究OA

Large hydro-turbine generator sets play a vital role in the operation of hydropower plants,and the pressure reducing valve systems,as an important part of them,directly affect the operation stability and safety of hydro-turbine generator sets.However,the instability of pressure reducing valve systems for some large hydro-turbine generator sets seriously affects their operation efficiency and safety.Therefore,it is of great significance to deeply analyze and improve the instability of pressure reducing valve systems for large hydro-turbine generator sets during operation.Based on the case analysis of unstable operation of the pressure reducing valves in actual operation process of a large generator set,this paper presents an improvement scheme of installing throttle valves on the outlet pipes of upper cavities of the pressure reducing valves.According to field test and analysis,this method can effectively control the opening speed of pressure reducing valves,thus stabilizing the downstream pressure of pressure reducing valves and providing a safety guarantee for stable operation of large hydro-turbine generator sets.