Abstract：The operation mode with constant downstream depth is widely used in practical engineering for its feasibility and simple logic, however, confronted with huge flow change. As a result, the water volume can exceed an allowable value and the pressure of water source has been enlarged. Thus an algorithm for variable downstream target depth was proposed based on the balance of water volume in each signal canal pond. When the water volume in the pond changes less, the algorithm is in the ope-ration mode with constant downstream depth, otherwise it adopts the mode with variable downstream target depth. As a demonstrating example, a control model based on Matlab was constructed for the Middle Route of South-to-North Water Diversion and simulated to clarify control performance of the algorithm. The results indicate that the algorithm proposed in the paper performs well and perfectly reduces volume changes. The algorithm makes two operation modes switchable in a flexible and smooth manner. Compared with the constant downstream depth method, the new method moderates both the water-level fluctuation and flow rate variation in the canal system, and avoids overshoot and repeated regulation of gate opening. Though it causes some delay in stable time, but it leads to an even smooth regulatory process.
钟锞, 管光华*, 廖文俊, 肖昌诚, 苏海旺. 基于渠池蓄量平衡的闸前变目标水位算法[J]. 排灌机械工程学报, 2018, 36(9): 857-862.
ZHONG Ke, GUAN Guanghua*, LIAO Wenjun, XIAO Changcheng, SU Haiwang. Algorithm with variable downstream target depth based on balance of water volume in canal pond. Journal of Drainage and Irrigation Machinery Engin, 2018, 36(9): 857-862.
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