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Den intelligenta pumpstationen -Optimering av energiförbrukningoch utveckling avautomatiseringsfunktion förfelhantering
KTH, School of Technology and Health (STH), Medical Engineering, Computer and Electronic Engineering.
2017 (Swedish)Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesisAlternative title
The intelligent pump station –Optimization of energyconsumption and development ofautomation function for errormanagement (English)
Abstract [sv]

Detta arbete har undersökt möjligheten att via styrsystemet för en avloppspump-station optimera energiförbrukningen av pumpar och med styrfunktioner förenkla driftunderhållet av stationen.För att undersöka energiförbrukningen har en teoretisk modell av en pumpstation gjorts där energitester för tre olika reglermetoder simulerats. Två av metoderna var start/stopp-styrning och en P-regulator som vanligen används i pumpstationer. Den tredje metoden var en Fuzzy-regulator som med hänsyn till nivån och nivåför-ändring reglerar varvtalet på pumpen.Resultatet från energitesterna visade att start/stopp-styrning förbrukade mest energi och att Fuzzy-regulatorn påvisade bäst egenskaper för att optimera energi-förbrukningen. Fuzzy-regulatorns energiförbrukning var mindre vid merparten av testerna jämfört med P-regulatorn. Fuzzy-regulatorn påvisade bäst egenskaper då inflödet var lågt relativt pumpens kapacitet och då bottenarean på sumpen var mindre.Vid undersökning av nya styrfunktioner har intervjuer av driftchefer utförts för att få en bild av problematiken som kan uppstå i en pumpstation. De styrfunktioner som utvecklats hade syftet att minska antalet förstoppade pumpar då detta var största problematiken.

Abstract [en]

This paper has investigated the possibility of optimizing the power consumption of pumps through the control system for a wastewater pumping stations. Further-more, the possibilities of developing new control functions has been investigated, with the purpose to simplify the operation maintenance of the station. To investigate energy consumption, a theoretical model of a pumping station has been made where energy tests for three different control methods have been per-formed. Two of the methods studied were on/off control and a P controller which are commonly used in pump stations. The third method was a Fuzzy controller which, with regard to the level and level change, regulates the speed of the pump.The results from the energy tests showed that on/off control consumed most en-ergy and the Fuzzy controller demonstrated best features to optimize energy con-sumption. The Fuzzy controller’s energy consumption was less in most of the tests compared with the P controller. The Fuzzy controller showed the best properties when the inflow was low relative to the pump’s capacity and the bottom area of the sump was smaller.When investigating new control functions, interviews with management executives has been made to get a picture of the problems that may occur in a pump station. The control functions developed had the purpose of reducing the number of clogged pumps as this was the biggest problem.

Place, publisher, year, edition, pages
2017. , p. 90
Series
TRITA-STH ; 2017:45
Keywords [en]
Wastewater pumping stations, energy optimization, Fuzzy controller, P controller, on/off control, PLC, detection function, cleaning function
Keywords [sv]
Avloppspumpstation, energioptimering, Fuzzy-regulator P-regulator, Start/stopp-styrning, PLC, detekteringsfunktion, rengöringsfunktion
National Category
Control Engineering
Identifiers
URN: urn:nbn:se:kth:diva-208961OAI: oai:DiVA.org:kth-208961DiVA, id: diva2:1109225
External cooperation
Huddinge Elteknik
Subject / course
Automatic Control
Educational program
Bachelor of Science in Engineering - Electrical Engineering
Supervisors
Examiners
Available from: 2017-06-16 Created: 2017-06-13 Last updated: 2017-06-16Bibliographically approved

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