抽水蓄能电站应急排水多目标优化方法及算例分析  

Multi-objective optimization method and case analysis for emergency drainage of pumped storage power station

作　　者：代鑫 陈举师 陈涛 黄弘[2] 李志鹏[1] 余水平 DAI Xin;CHEN Jushi;CHEN Tao;HUANG Hong;LI Zhipeng;YU Shuiping(Beijing Global Safety Technology Co.,Ltd.,Beijing 100080,China;Department of Engineering Physics,Tsinghua University,Beijing 100084,China)

机构地区：[1]北京辰安科技股份有限公司,北京100080 [2]清华大学工程物理系,北京100084

出　　处：《清华大学学报（自然科学版）》2023年第10期1558-1565,共8页Journal of Tsinghua University(Science and Technology)

摘　　要：随着抽水蓄能电站布局范围和建设规模的扩大,地下厂房水患威胁日益严重。针对水淹厂房事故场景下无法快速有效排水的问题,该文提出了一种抽水蓄能电站应急排水多目标优化方法。结合电站工程特点,建立了分阶段串并联综合应急排水方法。以最小化排水时间和装备运行成本为目标建立多目标优化模型,采用非支配排序遗传算法Ⅱ(NSGA-Ⅱ)对各阶段排水流量求取最优解。以某抽水蓄能电站为例开展研究,得到了有凸的Pareto最优前沿,应急排水时间最短约为52 h,装备运行成本最少约为138万元,同时给出了最优解对应的各阶段排水流量。结果表明,该方法能够合理推荐抽水蓄能电站应急排水方案,提高电站水淹厂房事故的应急处置水平。[Objective]The severity of flood disasters in underground powerhouses is increasing with the expansion of pumped storage power stations,and the current emergency drainage system of pumped storage power stations cannot meet the large discharge and high-lift demands during periods of abnormal water inflow.This paper proposes a phased parallel emergency drainage method for pumped storage power stations to address the problem of ineffective and slow drainage during underground facility floods.Furthermore,a multi-objective optimization model for emergency drainage is established to solve critical parameters in the drainage plan.[Methods]This paper proposes a multi-objective optimization method for emergency drainage in pumped storage power stations.First,based on the engineering characteristics of the underground powerhouses of pumped storage power stations,the emergency drainage process is divided into three stages:early,middle,and late.Second,emergency drainage methods are developed for each stage.During the early stage of drainage,for a small amount of accumulated water in the area above the top floor of the generator,submersible pumps and drainage pipelines are installed in the entrance tunnel to discharge the water to the exit of the tunnel.The middle stage of drainage focuses on draining the accumulated water from the generator floor;multiple drainage vehicles are connected in series to drain the water to the surface.Late-stage drainage is aimed at the accumulated water below the generator floor.A small volume floating pump is used to extract water from each layer,which is then drained to the generator floor.Here,a water storage tank is set up to temporarily store the water extracted by the floating pump;the water is drained in parallel through the entrance tunnel and the maintenance and leakage drainage pipes.Finally,the proposed drainage method is mathematically modeled to minimize drainage time and operating costs as objectives.Furthermore,the non-dominated sorting genetic algorithm-Ⅱ(NSGA-Ⅱ)is employed t

关 键 词：抽水蓄能电站 水淹厂房 应急排水 多目标优化 非支配排序遗传算法Ⅱ(NSGA-Ⅱ) 

分 类 号：X931[环境科学与工程—安全科学]