明渠调水工程事故段上游闸门群应急调控研究

发布时间：2018-10-30 07:17

【摘要】：为了保障明渠调水工程突发事故下的安全、高效运行,以流量中断事故为例,开展了事故段上游闸门群的应急调控策略及方法研究。应急调控策略包括:及早消减过剩的流量和蓄量、维持分水口的正常分水、充分利用渠道自身调蓄能力、避免渠池蓄量的反复调整等。具体提出了混合式闸前常水位+等体积运行方式,给出了切换范围的计算方法,基于流量平衡和调蓄时间估算方程,设计了两步式闸门群应急控制方法,并在南水北调中线总干渠上游30个渠池591 km渠道使用一维明渠非恒定流仿真模型进行了测试。结果表明,运用所提出的应急调控策略和两步式闸门群应急调控技术,无论渠道采用传统的单一式闸前常水位运行方式,还是采用新提出的混合式"闸前常水位+等体积"运行方式,均能取得安全高效的应急调控效果。相较而言,采用新型混合式运行方式可有效降低应急调控过程中的蓄量变化,加快过渡过程,案例中在闸门操作次数相当的条件下,过渡时间缩短约50%。
[Abstract]:In order to ensure the safe and efficient operation of the open channel water diversion project under the sudden accident, the emergency control strategy and method of the upstream gate group of the accident section were studied by taking the flow interruption accident as an example. The emergency control strategies include: early reduction of excess discharge and storage, maintenance of normal water distribution at the outlet, making full use of the channel's own storage capacity, and avoiding the repeated adjustment of the storage capacity of the channel pool, etc. The equal volume operation mode of constant water level in front of hybrid sluice is put forward, and the calculation method of switching range is given. Based on the estimation equations of flow balance and storage time, a two-step gate group emergency control method is designed. The unsteady flow simulation model of one dimensional open channel was used in the 591 km channel of 30 main channels upstream of the central route of the South-to-North Water transfer Project. The results show that by using the proposed emergency control strategy and two-step gate group emergency control technology, no matter the channel adopts the traditional operation mode of single sluice front constant water level, The new hybrid operation mode of "constant water level and equal volume in front of sluice" can achieve safe and efficient emergency control effect. In contrast, the new hybrid operation mode can effectively reduce the change of storage capacity in the emergency control process, and accelerate the transition process. In the case, the transition time is shortened by about 50% under the condition of the equal number of gate operations.
【作者单位】：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;
【基金】：水体污染控制与治理科技重大专项(2017ZX07108-001) 国家自然科学基金(50909104,51579251) 中国国家留学基金(201609110043)
【分类号】：TV66;TV698

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