摘要
本论文以东江－深圳供水改造工程为背景，对输水工程中应用转桨泵进行在线自动调节数字仿真进行了研究，其中包括单级泵站中对前池水位进行自动调节，单级泵站中对转桨泵的输出流量进行自动调节，以及多级泵站输水系统流量平衡自动调节。
文中，比较分析了现有的多种离线手动调节流量平衡的方法，在水轮机PID调速器的基础上，针对转桨泵设计了两种新型调节器，通过改变转桨泵的叶片安放角，分别能对泵站前池水位和泵的输出流量进行自动调节；提出了两种新型调节器的计算模型，使转桨泵在线自动调节动态仿真得以在微机上得以实现。
本文应用上述方法编制了过渡过程仿真程序，(1)进行了单级泵站中转桨泵在线自动调节泵站前池水位的动态仿真计算，并对调节参数的影响做了比较研究；(2) 进行了单级泵站中转桨泵在线自动调节泵输出流量的动态仿真计算，并对调节参数的影响做了比较研究；(3) 进行了多级泵站中转桨泵在线自动调节输水系统流量平衡的动态仿真计算。
计算结果表明，转桨泵进行在线自动调节具有很好的实时性、精确性，收敛性也较好。
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.
引文
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