本文關(guān)鍵詞：供水管網(wǎng)減壓閥優(yōu)化控制漏失研究　出處：《哈爾濱工業(yè)大學(xué)》2014年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 供水管網(wǎng) 漏失控制 壓力管理 減壓閥 NSGA-Ⅱ 粒子群算法

【摘要】：在用水需求不斷增長(zhǎng)、水資源日益稀缺的今天，城市供水管網(wǎng)漏失控制越來(lái)越受到國(guó)內(nèi)外供水行業(yè)的高度重視。供水管網(wǎng)漏失水平主要取決于管道物理屬性和管網(wǎng)運(yùn)行條件參數(shù)，其中管網(wǎng)壓力是一項(xiàng)較為重要的影響因素，降低管網(wǎng)服務(wù)壓力可有效減少漏失量。對(duì)此，本文以管網(wǎng)減壓閥優(yōu)化控制作為核心研究?jī)?nèi)容，旨在達(dá)到節(jié)約水資源、提高供水企業(yè)經(jīng)濟(jì)效益的目的。 分區(qū)降壓潛力測(cè)試是進(jìn)行供水管網(wǎng)壓力管理的第一步，可以為判斷分區(qū)是否需要實(shí)施壓力管理提供有力的理論依據(jù)。本文詳細(xì)論述分區(qū)降壓潛力測(cè)試的準(zhǔn)備工作及操作步驟，并以某供水系統(tǒng)為例進(jìn)行分區(qū)降壓潛力測(cè)試，初步確定管網(wǎng)降壓潛力的大小以及壓力管理可獲得的經(jīng)濟(jì)效益。根據(jù)分析結(jié)果認(rèn)為該分區(qū)管網(wǎng)漏失與壓力之間存在較大的正相關(guān)性，進(jìn)行管網(wǎng)壓力管理是十分必要的。 在分區(qū)降壓潛力測(cè)試之后，需要對(duì)減壓閥合理的安裝數(shù)量和位置做出評(píng)估。對(duì)此本文首先結(jié)合傳統(tǒng)水力模型和夜間最小流量法求得管網(wǎng)節(jié)點(diǎn)的漏失系數(shù)，建立考慮壓力相關(guān)漏失量的改進(jìn)水力模型。進(jìn)一步提出減壓閥優(yōu)化控制模型，該模型以管網(wǎng)漏失及減壓閥投資成本最小化作為兩個(gè)目標(biāo)函數(shù)，以減壓閥啟閉和開(kāi)啟時(shí)各時(shí)段的出口壓力控制值作為決策變量，以節(jié)點(diǎn)壓力為約束條件，采用NSGA-Ⅱ算法進(jìn)行求解。最后通過(guò)實(shí)例管網(wǎng)詳細(xì)論述減壓閥優(yōu)化控制模型的求解過(guò)程。 根據(jù)上述模型計(jì)算結(jié)果，可獲得減壓閥最優(yōu)的安裝數(shù)量和位置，但仍需要進(jìn)一步確定減壓閥安裝后的出口壓力控制值，從而建立壓力管理的完整體系。對(duì)此本文分別提出基于流量和時(shí)間調(diào)節(jié)的分區(qū)現(xiàn)場(chǎng)減壓閥優(yōu)化控制方法，并分別采用粒子群算法和統(tǒng)計(jì)分析方法進(jìn)行求解，得出減壓閥的最優(yōu)流量控制曲線(xiàn)或時(shí)間控制方案。對(duì)實(shí)例管網(wǎng)進(jìn)行分區(qū)現(xiàn)場(chǎng)減壓閥優(yōu)化控制方法研究，，結(jié)果表明減壓控制策略實(shí)施后管網(wǎng)漏失下降顯著。 最后將管網(wǎng)壓力管理體系應(yīng)用于某二級(jí)分區(qū)供水管網(wǎng)，得到該區(qū)域管網(wǎng)減壓閥的安裝位置和設(shè)置方案。結(jié)果表明壓力管理的應(yīng)用效果良好，能有效達(dá)到降低管網(wǎng)漏失和爆管率、提高供水安全性的效果。
[Abstract]:In the growing demand for water, water resources are becoming increasingly scarce today. The leakage control of urban water supply network is paid more and more attention by domestic and foreign water supply industry. The leakage level of water supply network mainly depends on the physical properties of pipeline and the parameters of network operation conditions. The pipe network pressure is a relatively important factor, reducing the network service pressure can effectively reduce the leakage. In this paper, the optimization control of the pipe network pressure relief valve as the core research, in order to achieve water resources conservation. The purpose of improving the economic benefit of water supply enterprises. The pressure reduction potential test is the first step in the pressure management of water supply network. It can provide a powerful theoretical basis for judging whether or not pressure management should be carried out. This paper discusses in detail the preparation and operation steps of the sub-area pressure reduction potential test. A water supply system is taken as an example to test the potential of pressure reduction. The potential of pressure reduction and the economic benefits of pressure management are preliminarily determined. According to the analysis results, there is a large positive correlation between leakage and pressure in the district pipe network. It is necessary to manage the pressure of pipe network. After the pressure reduction potential test, the reasonable installation number and location of the pressure reducing valve should be evaluated. Firstly, the leakage coefficient of the pipe network node is obtained by combining the traditional hydraulic model and the nocturnal minimum flow method. An improved hydraulic model considering pressure-related leakage is established, and an optimal control model of pressure reducing valve is proposed. The model takes the leakage of pipe network and the minimization of investment cost of pressure relief valve as two objective functions. The outlet pressure control value during the opening and closing of the pressure reducing valve is taken as the decision variable and the node pressure is taken as the constraint condition. NSGA- 鈪

本文編號(hào)：1404671