面向山西大水网供水泵站水力特性优化研究

发布时间：2018-03-27 08:33

本文选题：供水系统　切入点：水力特性　出处：《太原理工大学》2017年硕士论文

【摘要】：随着社会经济的快速发展,人们对水的需求越来越高,在城市、农村生活及工农业生产过程中,水扮演着不可或缺的角色。我国水资源在时间和空间上分布不均匀,而泵站作为一种重要的调水工程,在输配水过程中发挥着巨大作用和效益。因此,我国各地兴建了大批的供水泵站工程,如南水北调工程、引滦入津工程、东深供水工程、景泰川电力提灌工程等。供水泵站一般具有输水流量大、扬程高、距离长、输水情况复杂、耗电量大等特点,一旦发生水锤事故将会给国家和人民的生命财产造成巨大损失。因此,深入研究供水泵站水力特性不仅成为一项重要课题,而且对供水泵站安全、经济运行及自动化系统的开发也具有重要的理论和现实意义。国内外在泵站优化调度、水力过渡过程及水锤防护等方面已有一定的研究成果,本论文在前人研究成果的基础上,结合山西大水网中的辛安泉供水系统开展供水泵站水力特性优化研究,主要研究内容如下:(1)同型号水泵定速、不同型号水泵定速、同型号水泵变速、不同型号水泵变速运行等工况下水泵稳态数学模型的建立。(2)针对辛安泉供水系统的运行特性,建立水力过渡过程数学模型,基于特征线法的基本原理,对水力过渡过程数学模型进行求解。(3)建立液控蝶阀、超压泄压阀、进排气阀等三种不同水锤防护措施下的边界条件,分析其工作原理和特点,并建立对应的数学模型,为实现不同防护措施下水力过渡过程的计算机仿真计算提供依据。(4)根据已建立的稳态数学模型、水力过渡过程数学模型及初始、边界条件,应用Visual Basic 6.0编程语言和Microsoft SQL Server 2000数据库,开发供水泵站水力特性分析系统软件。(5)以山西大水网辛安泉供水系统中的韩家园泵站为例,进行泵站稳态及水力过渡过程的数值模拟,为供水泵站优化调度、安全运行及自动化系统的开发提供技术支持。本文的研究成果已经在辛安泉供水系统的试运行中得到应用,为该供水系统的优化调度、安全运行及自动化系统的开发提供了技术支持,具有较强的实际应用价值和推广意义。需要说明的是,超压泄压阀在供水系统发生水锤条件下开启—关闭过程中引起的二次水锤是下一步研究的主要内容。
[Abstract]:With the rapid development of social economy, the demand for water is becoming higher and higher. Water plays an indispensable role in urban, rural life and industrial and agricultural production. The distribution of water resources in China is uneven in time and space. As an important water transfer project, pump station plays a great role and benefits in the process of water transmission and distribution. Therefore, a large number of water supply pumping station projects have been built in various parts of our country, such as South-to-North Water transfer Project, Luanhe River diversion Project, Dongshen Water supply Project, etc. The water supply pumping station is generally characterized by large water flow, high lift, long distance, complex water conveyance, large power consumption, etc. Once the water hammer accident occurs, it will cause great loss of life and property of the country and people. Therefore, it is not only an important subject to study the hydraulic characteristics of water supply pump station, but also safe for water supply pump station. The development of economic operation and automation system also has important theoretical and practical significance. At home and abroad, there have been some research results in the aspects of pump station optimal dispatch, hydraulic transition process and water hammer protection. This paper is based on the previous research results. Combining with the Xinanquan water supply system in Shanxi large water network, the hydraulic characteristics optimization of the water supply pump station is carried out. The main research contents are as follows: the same type water pump has fixed speed, different type pump has fixed speed, the same type pump has changed speed, The establishment of steady state mathematical model of water pump under variable speed operation of different types of pumps. (2) aiming at the operating characteristics of Xinanquan water supply system, the mathematical model of hydraulic transition process is established, based on the basic principle of characteristic line method. The mathematical model of hydraulic transition process is solved. (3) the boundary conditions of hydraulic butterfly valve, overpressure relief valve and inlet and exhaust valve are established, the working principle and characteristics are analyzed, and the corresponding mathematical models are established. In order to realize the computer simulation calculation of hydraulic transition process under different protective measures, this paper provides a basis for computer simulation. According to the established steady state mathematical model, the mathematical model of hydraulic transition process and the initial and boundary conditions, Using Visual Basic 6.0 programming language and Microsoft SQL Server 2000 database, the hydraulic characteristic analysis system software of water supply pump station is developed. Taking Han Jiayuan pump station in Xin-Anquan water supply system of Shanxi large water network as an example, the numerical simulation of steady state and hydraulic transition process of pump station is carried out. It provides technical support for optimal dispatching, safe operation and development of automation system of water supply pumping station. The research results of this paper have been applied in the trial operation of Xinanquan water supply system. The development of safe operation and automation system provides technical support, which has strong practical application value and popularization significance. The secondary water hammer caused by the overpressure relief valve under the condition of water hammer in the water supply system is the main content of the next research.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TV675

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