摘要
【目的】抽水蓄能电站当中的技术供水系统主要作用是对各个运行设备进行润滑与冷却,对整个抽水蓄能电站的安全与稳定运行起着重要的作用。为了技术供水系统在稳态与暂态条件下能够保证其流量与压力的安全要求,同时实现绿色节能的目标,【方法】以某抽水蓄能电站技术供水系统为研究对象,基于MATLAB软件对抽水蓄能电站技术供水系统的暂态和稳态进行分析研究,验证设计方案的合理性。采用图论对复杂技术供水管网结构进行构建,应用MATLAB建立管网水力计算数学模型,通过矩阵对管网的各个属性之间的关系进行描述,采用迭代法进行求解获得稳态参数。基于有压管道非恒定流微分方程组的特征线法,模拟工况变化下暂态过程中的压力波动与流量波动,绘制技术供水管网各用水管路的压力与流量变化曲线。【结果】结果显示:(1)稳态过程中建立的管网模型大、小流量支管误差分别在2.70%、5.18%以内,压力误差在0.37 m以内;(2)动态过程管网在压力波动中产生的压力最大、最小值分别为38.890 m、2.647 m。【结论】结果表明:本研究所建立的技术供水管网稳态水力计算模型精度能够满足工程要求,同时动态水力计算满足水锤防护标准要求,为抽水蓄能电站技术供水系统的安全稳定运行提供了理论依据,以及对节能措施的可行性进行了理论验证。
[Objective]In pumped storage power stations,technical water supply systems lubricate and cool operating equipment.Ensure the safe and stable operation of pumped storage power stations.In order to ensure that the technical water supply system can meet the safety requirements of flow and pressure under steady state and transient conditions,and at the same time achieve the goal of green energy saving.[Methods]This paper takes the technical water supply system of a pumped storage power station as the research object,the transient and steady-state of the technical water supply of pumped storage power station are analyzed by using MATLAB software,and verifies the rationality of the design scheme.The method of graph theory is used to construct the structure of complex technical water supply pipe network MATLAB is used to establish a hydraulic calculation mathematical model for the pipe network,describes the relationship between attributes of the pipe network through the matrix,and uses the iterative method to solve the steady-state parameters.Based on the characteristic line method of the non-constant flow differential equation system of pressurized pipeline,the pressure fluctuation and flow fluctuation in the transient process under the change of working conditions are simulated,and the pressure and flow curves of each water pipeline in the technical water supply pipe network are drawn.[Results]The result show that:(1)the errors of large and small flow branch pipes established in the steady-state process are within 2.70%and 5.18%,respectively,and the pressure error is within 0.37 m.(2)The maximum and minimum pressures generated by the dynamic process pipe network in the pressure fluctuation are 38.890 m and 2.647 m,respectively.[Conclusion]The steady condition model of the technical water supply pipe network established in this study can meet the engineering requirements,and the transient conditions meet the requirements of water hammer protection standards,which provides a theoretical basis for the design,safe and stable operation of the technical water supply system of pumped storage power station,and theoretical verification of the feasibility of energy-saving measures.
作者
黄建德
张新
何秋
陈小强
林靖涛
HUANG Jiande;ZHANG Xin;HE Qiu;CHEN Xiaoqiang;LIN Jingtao(East China Tongbai Pumped Storage Power Generation Co.,Ltd.,Hangzhou 310000,Zhejiang,China;Power China Huadong Engineering Corporation Limited,Hangzhou 310000,Zhejiang,China;College of Energy and Electrical Engineering,Hohai University,Nanjing 211100,Jiangsu,China)
出处
《水利水电技术（中英文）》
北大核心
2023年第12期167-177,共11页
Water Resources and Hydropower Engineering
基金
国网新源集团(控股)有限公司科技项目资助(SGXYTB00YWJS2100090)
国家重点研发计划政府间国际科技创新合作重点专项(2019YFE0105200)。
关键词
管网水力计算
图论
MATLAB
过渡过程
抽水蓄能电站
hydraulic calculations for pipe networks
graph theory
MATLAB
transition process
pumped storage power station
