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Author:Eerola, Iiro-Pekka
Title:Vesijohtoverkoston vuotojen paikannus simuloinnilla
Leakage localization in water distribution networks using simulation
Publication type:Master's thesis
Publication year:2012
Pages:69      Language:   fin
Department/School:Automaatio- ja systeemitekniikan laitos
Main subject:Automaatiotekniikka   (AS-84)
Supervisor:Visala, Arto
Instructor:Aksela, Kia
OEVS:
Electronic archive copy is available via Aalto Thesis Database.
Instructions

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Location:P1 Ark Aalto  5120   | Archive
Keywords:water distribution network
leakage
hydraulic simulation
modeling
vesijohtoverkosto
vuoto
verkostosimulointi
mallinnus
Abstract (eng): Water loss average worldwide is estimated to be 20-30 % in water supply distribution networks.
An efficient leakage detection method is needed because broken water pipes cause numerous problems.
Technologies for locating leaks vary but none of them have become an efficient solution.

The aim of this thesis is to implement a method for localizing leakages.
The method has its basis in the water distribution network modelling and simulation.
Measured hydraulic data from the network is compared against simulation results and a mathematical optimization problem is formed based both on the measured and simulated data.
Solutions for the defined optimization problem are areal leakage locations and amounts in the water distribution network.

A leakage localization plugin for pipe network simulation software EPANET, developed by the U.S.
Environmental Protection Agency, was implemented in this thesis.
Different algorithms were studied and their capability to solve the complex optimization problem was analysed.
Two distinct algorithm implementations were included in the application package.
Finally, application performance was tested on Hämeenlinna water supply distribution network.
Abstract (fin): Vesijohtoverkostot vuotavat keskimäärin 20 - 30 % maailmanlaajuisesti.
Särkyneistä putkista valuva vesi aiheuttaa lukuisia ongelmia, minkä vuoksi tehokkaalle menetelmälle vuotojen paikallistamiseksi on tarvetta.
Eri tekniikoihin perustuvia vuotojen paikallistamismenetelmiä on olemassa, mutta silti yksikään niistä ei ole yleistynyt hyvin toimivaksi ratkaisuksi.

Tässä työssä suunnitellaan ja toteutetaan vesijohtoverkoston vuotojen paikannusmenetelmä, joka perustuu verkostosta luotavaan tietokonemalliin ja sen simulointiin.
Tutkittavasta verkostosta on saatavilla hydraulisia mittauksia, joita verrataan simulointiajoista saatuihin vastaaviin arvoihin.
Vuotojen paikannus muokataan matemaattiseksi optimointiongelmaksi, jonka ratkaisuna ovat vuotojen alueelliset sijainnit ja suuruusluokat verkostossa.

Vuotojen paikannus toteutettiin työssä lisäosana Yhdysvaltain ympäristönsuojeluviraston kehittämään EPANET -simulointiohjelmaan.
Toteutusta varten selvitettiin aluksi, mitkä algoritmit soveltuvat laajan optimointiongelman ratkaisemiseksi.
Tämän jälkeen kaksi erityyppistä algoritmitoteutusta sisällytettiin sovellukseen, joka sijoittaa tuntemattomista paikoista vuotavan veden oikeisiin verkoston kohtiin.
Sovelluksen suorituskykyä ja toimintaa testattiin Hämeenlinnan vesijohtoverkostossa.
ED:2012-08-23
INSSI record number: 45099
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