明渠闸前常水位运行控制解耦试验研究  

Experimental study on decoupling algorithm for canal operation at constant downstream depth

作　　者：崔巍[1] 陈文学[1] 郭晓晨[1] 穆详鹏[1] 姚雄[2] 

机构地区：[1]中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京100038 [2]南水北调中线干线工程建设管理局,北京100053

出　　处：《水力发电学报》2012年第6期115-119,125,共6页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金项目(50909104);"十一五"国家科技支撑计划项目(2006BAB04A12)

摘　　要：在自动控制渠道物理模型试验平台上,测试了闸前常水位运行方式下的明渠解耦控制算法,研究了解耦系数变化对控制性能的影响。试验渠道长315m,包含5级节制闸,由包含解耦环节的PI反馈控制算法控制。渠道上游方向的解耦采用类DecouplerⅠ结构实现,下游方向的解耦采用流量控制器实现。试验研究表明,所设计的包含解耦环节的PI反馈控制算法能够快速有效地克服外界扰动及不确定因素的影响,实现闸前常水位运行方式。当增大解耦系数时,各渠池稳定历时ts缩短,水位波动指标MAE减小,绝对闸门开度积分指标IAW减小。若解耦系数过大,水位控制性能转而变差,闸门反复启闭次数增多。综合试验结果以及已有数值仿真研究成果,建议解耦系数在0.6～1.0间取值,对于分水频繁的渠道取偏小值。A decoupling algorithm was experimentally tested on an automatically-controlled model canal operated at constant downstream depth,and influence of different decoupling coefficients on control behaviors was analyzed in this work.This model canal of 315m long was equipped with five sluice gates that were regulated by PI feedback control algorithms combined with decouplers.In the upstream and downstream directions,the decoupling was realized by means of a decoupler I-type structure and a flow controller respectively.The test results show that this PI controller can effectively reduce the influence of disturbances and uncertainties in the system and realize canal operation at constant downstream depth.Large decoupling coefficient helps to shorten the water level-recovering time and to reduce the water level fluctuation indicator MAE and the gate movement indicator IAW,while an overlarge coefficient may cause negative water control effects and excess gate movements.The present test results and previous numerical simulations together suggest a proper value range 0.6~0.1 of the decoupling coefficients,but smaller values are recommended for canal with frequent withdraws.

关 键 词：水力学及河流动力学 解耦算法 物理模型试验 明渠调水工程 闸前常水位运行 PI控制 

分 类 号：TV68[水利工程—水利水电工程]