变频调角双调节轴流泵机组在大型泵站中的优化运行研究

Research on the Optimal Operation of Axial Flow Pump Units with Variable Frequency and Angle Regulation

针对湖南某泵站优化调度问题,建立了变频调角双调节轴流泵站内优化调度模型,并采用粒子群算法进行求解。研究表明,在相同的日提水量下,随着静扬程的增加,耗电量逐步增加,平均开机角度快速增加。在相同静扬程下,随着日提水量的增加,耗电量逐步增加,平均开机角度逐步增加。在相同条件下,3时段操作和4时段操作耗电量相差较小,考虑到运行操作的简单性,建议采用3时段操作方案。在日提水量120万m3、静扬程8.0 m左右,泵站宜采用高低转速匹配运行,降低静扬程或日排水量,则水泵运行转速偏向490 r/min时,效率较高;反之则向730 r/min偏移。

Targeted at the optimal problem of a pumping station in Hunan Province,this paper establishes the optimal model in an axial-flow pumping station with variable frequency and angle regulation,and uses the particle swarm optimization algorithm to solve problems.The results show that with the increase in static head,the power consumption increases gradually and the start angle increases rapidly under the same daily water withdrawal.Under the same static head,with the increase in daily water withdrawal,the power consumption increases gradually,and the starting angle increases gradually.Under the same conditions,the difference of power consumption between 3-period operation and 4-period operation is small.Considering the simplicity of operation,3-period operation scheme is recommended.When the daily water lifting capacity is about 1.2 million m3 and the static lift is about 8.0 m,the pump station should be operated with matching high and low rotational speeds.When the static lift or the daily drainage volume is reduced,the efficiency of the pump is higher when the rotational speed of the pump is shifted to 490 r/min,and vice versa,to 730 r/min.