计及变频器和电机损耗的全变速泵站效率优化控制

Optimization Control of Full-Variable-Speed Pump Stations Considering the Losses of the Frequency Converter and the Motor

针对已有研究泵站效率优化的文献均未涉及变频器和电机损耗的现状,提出计及变频器和电机损耗的全变速泵站效率优化模型,利用枚举法和约束变尺度优化算法求解模型,得到最佳控制策略。对比不计变频器和电机损耗的全变速泵站优化模型,进行大量的仿真实验和经济效益分析。结果表明,在相同给水指标下,变频器和电机损耗不影响全变速泵站效率优化控制的优化决策,在仅以求得优化决策为目的的情况下,可不予考虑,以简化建模和求解过程;但在评估泵站的节能效果时,必须考虑。

Among the existing research on the optimal control of pump stations, the inverter and motor losses are ignored during the modeling. Aimed to this problem, a novel efficiency optimization model of full-variable-speed pump stations that considers the inverter and motor losses in the modeling is proposed. Based on the analysis of the inverter and motor losses, the new optimization model is presented firstly. Then, the model is solved by the Enumeration and Reduced Gradient Algorithm. Compared to the model that does not consider the extra losses, plenty of experiments and economic analysis are carried on finally. The results show that, given the same water-supply index, the inverter and motor losses have no influence on the optimization decisions, which can simplify the modeling and solving; while during the evaluation of the pump stations＇ energy-saving efficiency, it should be considered.