输配水管网系统中关阀水锤的优化控制研究

Study on the optimal control of valve-induced water hammer in water conveying and distribution systems

城镇输配水管网系统中的关阀水锤是影响系统安全运行的重要因素之一。为降低关阀水锤危害,建立了输配水管网系统中的多阶段线性关阀水锤优化模型,以降低系统水锤压力波动为目标,利用粒子群优化算法,寻找最优的关阀过程曲线。对比优化结果和传统的线性关阀结果,多阶段线性关阀不仅有效地降低了水锤压力波动,而且大大缩短了关阀时间。优化结果从理论上证实并完善了工程中两阶段关阀操作的正确性和有效性。研究内容和成果有利于改善常规的阀门操作,为输配水管网系统的水锤防护提供有价值的理论和技术依据。

The valve-induced water hammer is one of the influential factors that affect the operation safety of urban water transmission and distribution systems. To control this potential damage, a piece-wise linear valve-closure optimal model was established to reduce the pressure fluctuations during the hammer process. The particle swarm optimizationalgorithm （PSO） wasutilized to search for the optimal piece-wise linear valve-closure curve. The comparative results between the optimal scheme and the traditional linear valve-closure indicated that the piece-wise linear valve-closure scheme could significantly reduce both the pressure fluctuation and the valve-closure time. In addition, the optimal results theoretically validated the effectiveness and applicability of the typical two-stage valve closure in practical applications. The findings and results of this work enhanced the operation of control valves in the daily operation and management of water transmission and distribution systems.