取水泵站能效的模型预测控制

Model Predictive Control of Energy Efficiency of an Intake Pump Station

在研究取水泵站能量模型及能效开环优化控制基础上,提出一种系统级的运行效率模型预测控制方法。本控制方法以定速泵运行状态为优化变量,以泵站总能源费用最小为目标。目标函数融入了分时电价及取水口水位等变量,并处理了总用水量、清水池水位高低限等约束。以一座配置定速泵的取水泵站为例,对开环优化及模型预测控制方法分别进行了仿真研究和对比分析。验证了能效模型预测控制方法的有效性及其处理变量预测误差的性能。提出的控制方法还能实现需求侧优化管理,有助于电网'移峰填谷'策略的实施。

The energy model of an intake pump station was firstly introduced. Then, an open loop optimal control approach and a model predictive control （MPC） approach were introduced to improve the operational efficiency of intake pump stations. They lump time-of-use （TOU） tariff and intake level into their objective functions, and take total water consumption and the low and high limit of the clean water reservoir as constraints as well. An intake pump station, equipped with three constant speed pumps, was taken as a case study. The conventional optimal control and the MPC approach were investigated, respectively. The advantage of the MPC approach was convinced by the simulation results. Further, the load shifting of intake pump stations was also achieved through the proposed control approaches.