水利学报2025，Vol.56Issue(12)：1570-1583,14.DOI:10.13243/j.cnki.slxb.20240706
长距离输水渠道系统水温-水位协同调控模式研究
Research on coordinated water temperature and level regulation mode for long-distance water conveyance canal systems
摘要
Abstract
The ice formed during the winter operation of long-distance water conveyance projects limits the water con-veyance capacity of the canal.Inflow of warmer water from the lower layer of an offline reservoir can raise the canal's water temperature,effectively reduce the temporal and spatial extent of ice formation and enhance winter water deliv-ery.However,supplying water from the reservoir to the canal at a constant flow rate throughout the winter may result in complete reservoir depletion.Furthermore,the current control modes of the canal system typically require main-taining a constant downstream water level.The inflow from the reservoir could disturb the hydraulic stability of the canal,causing deviation of the water level at downstream control points from their target value.This would increase the complexity of automatic canal system control and potentially lead to canal overtopping.Therefore,this study designed a water temperature controller for long-distance water conveyance canal systems,which dynamically adjusts the inflow from the reservoir based on the water temperature at the control point to save water from the reservoir.A coordinated regulation mode of water temperature and level in long-distance water conveyance canal system was pro-posed.Based on the traditional water level feedback controller,the reservoir inflow output from the water temperature controller is introduced as a feedforward input to the water level controller,thereby assisting downstream control points in maintaining a stable water level.The results show that the water temperature controller can maintain the water temperature at the control point between 0.5℃and 2℃,preventing ice conditions between the inflow point and the control point,while saving 20%of the reservoir water compared to the constant inflow scheme.Under the coordinated regulation of water temperature and level,the water level at the downstream control point of the canal will be lowered in advance to accommodate the inflow from the reservoir and then be dynamically adjusted according to changes in reservoir inflow,returning to near the target value within 4-5 days.The coordinated water temperature and level regulation mode proposed in this study can ensure effective canal warming,conserve reservoir water,and maintain stable water delivery.The coordinated regulation approach proposed in this study offers certain reference value for multi-objective regulation of complex systems.关键词
长距离输水工程/热源汇入/协同调控/冰期/输水能力提升Key words
long-distance water conveyance project/warm water inflow/coordinated regulation/ice period/enhancement of water conveyance capacity分类
建筑与水利引用本文复制引用
管光华,熊发京,殷心盼,毛中豪,王康..长距离输水渠道系统水温-水位协同调控模式研究[J].水利学报,2025,56(12):1570-1583,14.基金项目
国家重点研发计划课题(2022YFC3202504) （2022YFC3202504）
