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为了保证大型长距离多级泵站引水工程运行中全系统的流量平衡,建立了全系统的仿真模型。根据泵站所处位置不同提出两种新的系统流量调节方法。通过调节转桨泵转轮桨叶角度改变泵的流量特性,使取水泵站流量达到系统调度要求,使中间泵站保持其前池水位不变,以此来实现系统的流量自动调节平衡。仿真结果表明:采用这种调节方法可以实现全系统的流量自动平衡,但是在流量调节中需要考虑明渠的大时滞性的影响,以达到全系统流量调节的优化。
In order to ensure system-wide flow balance during the operation of large-scale long-distance multi-stage pumping stations, a system-wide simulation model was established. According to the pump station location, two new system flow regulation methods are proposed. By adjusting the impeller blade angle of the impeller to change the flow characteristics of the pump, the flow of the pumping station reaches the requirements of the system scheduling so that the intermediate pumping station keeps the water level of the forehearth unchanged, so as to realize the automatic flow regulation and balance of the system. The simulation results show that the whole system traffic can be automatically balanced by this regulation method, but the influence of the large delay of the open channel needs to be considered in the traffic regulation so as to achieve the optimization of the whole system traffic regulation.