Study On Numerical Simulation Of Adjustable-blade Pump On-line Autoregulation In Diversion Works

The numerical simulation for adjustable-blade pump on-line autoregulation in diversion works has been studied in this paper whose background is modification works of Dongjiang-Shengzhen diversion works. The problems include autoregulation on water height of the fore bay in single pump station, autoregulation on output of adjustable-blade pump in single pump station, and autoregulation on flow equation of multilevel pump stations.In this paper, some off-line manual methods for regulation of flow equation have been compared and analyzed. Based on PID speed governor of turbines, two kinds of governors are designed for adjustable-blade pump, which can perform autoregulation on water height of the fore bay and on pump output by adjusting the blade angle of adjustable-blade pump. The computation models of the two kinds of governors are also offered and the transient simulation can be done on PC.Several transient simulation programs have been developed based on the models above, and were put into practice of the transient simulations of following: (1) autoregulation on water height of the fore bay in single pump station, and the influence of governor parameters; (2) autoregulation on output of adjustable-blade pump in single pump station, and the influence of governor parameters; (3) on-line autoregulation on flow equation of multilevel pump stations system.The computation results are satisfying and prove that adjustable-blade pump on-line autoregulation can be done with good accuracy and convergence in realtime.