尾水调压室尺寸对水电站小波动过渡过程的影响研究

Influence of Tailrace Surge Chamber Size on Small Fluctuation Transition Process in Hydropower Stations

带有调压室的长引水式电站,由于机组负荷出现微小变化等原因会导致出现小波动过渡过程,小波动过渡过程是否稳定,直接关系到过渡过程品质的好坏,涉及到电站安全及供电质量。当出现微小扰动时,若调速器可将该扰动状态恢复到初时段的稳定状态或是在规范允许的范围内波动时,则系统稳定;若调节过程中系统一直处于振荡状态,则系统不稳定。在分析过程中,调压室作为水电站输水系统上的主要建筑物,其断面尺寸对输水系统小波动过渡过程的影响研究尤为重要。

Due to small changes of the unit load,small fluctuation transition processes occur in the long diversion hydropower station with surge chamber.Whether the small fluctuation transition process is stable or not is directly related to the quality of the transition process as well as the safety and power supply quality of the power station.When a small disturbance occurs,if the governor is able to restore the disturbance state to the stable state in the initial period or only fluctuates within the allowable range of the specification,the system will be stable.If the system has been in oscillation state during the regulation process,the system will be unstable.In the analysis process,the main structure of the water conveyance system of the hydropower station is the surge chamber,whose section size has a particularly important influence on the transition process of the water conveyance system.