长距离梯级泵站输水工程经济运行研究

发布时间：2019-01-14 15:53

【摘要】：梯级泵站供水工程是一项复杂的系统工程,其设计、施工、运行管理水平等将直接影响工程的安全性及经济效益。对于此类工程必须在保证系统安全运行的前提下最大限度的节约能源、降低运行成本。本文结合某工程实例,在已有的泵站优化理论的基础上,针对某工程的项目特点,开展了梯级泵站经济运行方面的研究工作。文中主要从如下几个方面进行了研究:(1)通过分析供水系统水力特性,以水头平衡方程为基础,将极值搜索法应有到水泵工况点求解中。(2)研究了某工程二、三、四级泵站不同运行方案的流量范围。研究了电机效率相关资料,提出了电机效率关于其频率和负荷率的关系式。(3)以泵站能耗最小为目标,建立泵站机组间流量最优分配的数学模型。采用非线性规划法分别研究了泵站内水泵机组对称布置、不对称布置情况下,各机组间流量的最优分配问题。(4))针对某工程井群泵站的工程特点,分别以万吨水耗电量最小和单方水电费最小为目标建立数学模型并求解。报据《销售电价管理暂行办法》规定与工程的实际情况,本工程选择按变压器容量计费的收费方式,推荐采用单方水电费最小的运行方案为最经济的运行方案。以井群泵站日运行电费最小为目标建立数学模型井求解,得出在不同日用水量下井群泵站最经济的运行方案。(5)以某工程梯级泵站为例,对整个供水系统进行经济运行研究,得出在不同供水流量情况下,梯级泵站的最优开机组合和相应的变频泵转速,使整个供水系统达到经济运行的目的。
[Abstract]:The cascade pumping station water supply project is a complex system engineering, its design, construction, operation management level will directly affect the safety and economic benefits of the project. This kind of project must save energy and reduce the running cost under the premise of ensuring the safe operation of the system. Based on the existing optimization theory of pumping station and according to the characteristics of a project, the research work on the economic operation of cascade pumping station is carried out in this paper. This paper mainly studies the following aspects: (1) by analyzing the hydraulic characteristics of the water supply system, based on the water head balance equation, the extreme value search method should be applied to the solution of the pump working point. (2) the second and third of a certain project are studied. Flow range of different operation schemes for four stage pump stations. The related data of motor efficiency are studied and the relationship between motor efficiency and frequency and load rate is put forward. (3) aiming at the minimum energy consumption of pumping station, a mathematical model of optimal flow distribution between pumping stations is established. In this paper, a nonlinear programming method is used to study the optimal flow distribution of pump units in a pump station under the condition of asymmetric layout. (4) according to the engineering characteristics of a well group of pumping stations, The mathematical models are established and solved with the minimum power consumption of ten thousand tons of water and the minimum of one side water and electricity charges, respectively. According to the "interim measures for the Management of electricity Price of Sale" and the actual situation of the project, the project chooses the charging method according to the capacity of the transformer, and recommends that the operation scheme with the smallest cost of water and electricity in one side is the most economical operation scheme. Taking the minimum daily electricity charge of well group pump station as the goal, the mathematical model well solution is established, and the most economical operation scheme of well group pump station under different daily water consumption is obtained. (5) taking a cascade pumping station as an example, The economic operation of the whole water supply system is studied. It is concluded that the optimal start-up combination of cascade pumping station and the corresponding frequency conversion pump speed can make the whole water supply system achieve the purpose of economic operation.
【学位授予单位】：西安理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TV675

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