Identifikacija pojednostavljenog dinamičkog modela vjetroagregata i sinteza modelskog prediktivnog regulatora

master's thesis

• Title (english): Identification of Simplified Wind Turbine Dynamical Model and Model Predictive Controller Synthesis
• Author: Marijo Kvesić
• Mentor: Nedjeljko Perić (mentor)
• Committee member: Nedjeljko Perić (predsjednik povjerenstva)
• Committee member: Mato Baotić (član povjerenstva)
• Committee member: Vinko Lešić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2017-07-18, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

Porastom dimenzija vjetroagregata povećavaju se i opterećenja što smanjuje životni vijek vjetroagregata. Klasični regulatori ne uspijevaju dovoljno dobro smanjiti opterećenja. Stoga se sve češće koriste modelski prediktivni regulatori (MPC). MPC omogućuje optimalno praćenje reference uz smanjenje strukturnih opterećenja. Poznavanje modela, upravljački problem i rješavanje upravljačkog problema glavni su elementi sinteze MPC regulatora. U ovom radu korišten je nelinearni model kojeg je potrebno linearizirati te diskretizirati jer se upravljački problem rješava na računali. Upravljački problem sadrži kriterijsku funkciju te ograničenja varijabli. Oba segmenta upravljačkog problema su bitna jer lošim odabirom računalo neće moći naći optimalne iznose upravljačkih varijabli, a da pritom varijable ostanu unutar zadanih ograničenja.

Abstract (english)

Increasingly larger wind turbines have to withstand larger structural loads. Classic controllers are unable to cope with structural load and the need for new control method is rising. One of the solutions is model predictive controller (MPC). MPC calculates optimal trajectory while reducing structural loads. Wind turbine is non-linear system. Linearising model computer can faster compute cost function. Since computer is solving MPC problem, model has to be discrete. Both, cost function and limitations has to be carefully chosen. If limitations are to strict algorithm will not be able to calculate optimal vector of control inputs and if limitations are to big, algorithm will not reduce structural loads.

• Keywords: Vjetroagregat; strukturna opterećenja; modelski prediktivni regulator; upravljački problem; kriterijska funkcija; ograničenja
• Keywords (english): Wind Turbine; Structural Loads; Model Predictive Controller; Cost Function; Limitations
• Language: croatian
• URN:NBN: urn:nbn:hr:168:323975
• Study programme: Title: Electrical Engineering and Information Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije (magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2019-03-13 22:12:12