Vol.9, No 1, 2010 pp. 69 - 77
UDC
62-519.18 681.325-181.48 628.3 621.396.94
INTELLIGENT DECISION MAKING IN WASTEWATER TREATMENT PLANT SCADA SYSTEM
Vlastimir Nikolić, Žarko Ćojbašić, Ivan Ćirić, Emina Petrović
Faculty of Mechanical Engineering, University of Niš, A. Medvedeva 14,
18000 Niš, Serbia
E-mail: vnikolic@masfak.ni.ac.rs, zcojba@ni.ac.rs, ciric.ivan@masfak.ni.ac.rs, emilli85@gmail.com
Abstract.
In this paper a SCADA system for a primary wastewater treatment control system with fuzzy controller is presented. As local controllers Programible Logical Controllers have been used, special attention has been dedicated to connection with SCADA. The main problem considered in this paper is the development of remote monitoring and controlling of systems for wastewater treatment and its improvement by adding a module for intelligent decision making. The usage of intelligent sensors and actuators, as well as the control of the dislocated facilities and transportation systems for wastewater treatment is discussed. Furthermore, a simplified system for web control is developed, which is an excellent basis for further improvement in order to develop a complete system of control and supervision of wastewater. The problem of communication between local controllers and central SCADA system, which is located in the dispatch center, was solved in several ways using modern wireless technologies. The developed intelligent module of SCADA application based on Sugeno type fuzzy algorithm makes decisions at a higher control level, while the local PLC controls the appropriate dislocated facilities. The PLC used in this work has no fuzzy module or software. The proposed fuzzy-SCADA system is flexible and applicable in other industrial applications and it is characterized by an optimal system performance and faulty safety.
Key Words:
intelligent control, fuzzy logic, SCADA, wastewater treatment, wireless communications.
INTELIGENTNO ODLUČIVANJE U SCADA SISTEMU POSTROJENJA ZA TRETMAN OTPADNIH VODA
U ovom radu predstavljen je SCADA sistem za nadzor i upravljanje postrojenjem za tretman otpadnih voda primenom fazi upravljanja. Za lokalno upravljanje korišćeni su PLC kontroleri, a posebna pažnja je posvećena njihovom povezivanju sa SCADA sistemom. Razmatran je problem razvoja daljinskog nadzora i upravljanja sistemom za tretman otpadnih voda i njegovog poboljšanja dodavanjem modula za inteligentno odlučivanje. Upotreba inteligentnih senzora i aktuatora za upravljanje udaljenim objektima i transportnim sistemima je takođe razmatrana. Osim toga razvijen je jednostavan sistem za web upravljanje koji predstavlja odličnu osnovu za dalje unapređenje u cilju razvoja kompletnog sistema za upravljanje i nadzor tretmana otpadnih voda. Komunikacija između centralnog dispečerskog SCADA sistema i lokalnih kontrolera ostvarena je na više načina korišćenjem savremenih bežičnih tehnologija. Inteligentni modul SCADA aplikacije zasnovan na Sugeno fazi algoritmu donosi odluke na višem nivou upravljanja dok lokalni PLC kontroleri upravljaju odgovarajućim dislociranim objektima sistema. PLC kontroler koji je korišćen u ovom postrojenju ne poseduje fazi modul ili softver. Predloženi fazi-SCADA sistem je fleksibilan i primenljiv u drugim industrijskim aplikacijama, a karakteriše ga ostvarivanje optimalnog učinka sistema i povećana sigurnost.
Ključne reči:
inteligentno upravljanje, fazi logika, SCADA, tretman otpadnih voda, bežične komunikacije
