基于分解协调法的梯级泵站优化模型局部敏感性分析

Local Sensitivity Analysis of Cascade Pumping Station Optimization Model Based on Decomposition-Coordination Method

为了提高梯级泵站的运行效率,对其进行优化调度研究十分必要。以济南市玉符河卧虎山水库梯级泵站为例,基于分解协调法建立了能耗优化模型和日运行电费优化模型,利用修正的Morris筛选法对模型进行了局部敏感性分析。结果表明:对于能耗优化模型,能耗和单位流量(扬程)能耗随着瞬时流量、后池水位的增加和前池水位的降低而增加,参数的敏感性排序为瞬时流量、前池水位、后池水位;对于日运行电费模型,参数的敏感性排序为日调水量、高峰时段最小流量、低谷时段最大流量。在不超过机组承受能力和满足各种运行条件的情况下,高峰时段最小流量越小和低谷时段最大流量越大,日运行电费相对来说越小。研究为梯级泵站的优化调度提供了一定的参考和指导意义。

With the continuous construction of large-scale water transfer projects,the role of cascade pump stations is becoming more and more important.In order to improve the operation efficiency of cascade pump stations and reduce energy consumption,it is necessary to study the optimal operation of cascade pumping stations.Firstly,this paper describes an optimal operation model of cascade pumping stations and an optimal model of daily operating electricity tariffs based on decomposition-coordination approach.Secondly,taking the cascade pumping stations of Wohushan Reservoir at Yufu River in Jinan City for the South-to-North Water Diversion Project as an example,the local sensitivity analysis of the model is carried out by using the modified Morris Screening Method.The results show that for the optimization model of energy consumption,the energy consumption,unit flow rate and head energy consumption increase based on the increasing in instantaneous flow rate and behind water level as well as decrease in the forebay water level.The paramtric sensitivity is ranked as instantaneous flow rate>forebay water level>behind water level.For the model of daily operating electricity tariffs,its paramtric sensitivity is ranked as daily water regulation>minimum flow rate during peak period>maximum flow rate during trough period.At the same time,under the condition that not exceeding the unit's carrying capacity and meeting with various operating conditions,the smaller the minimum flow rate during the peak period,the larger the maximum flow rate during the trough period,the relatively smaller the daily operating electricity tariffs is.This paper innovatively explores the characteristics of the actual operation of the cascade pumping stations,and then quantitatively identifies the sensitive parameters,which can provide reference and guidance for the optimization research on the cascade pumping stations.