Sorrentino, Vincenzo (2015) GRID-CONNECTECD DOUBLE-STAGE AC-AC POWER CONVERTER FOR CSP RENEWABLE ENERGY SYSTEMS. [Tesi di dottorato]

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Item Type: Tesi di dottorato
Lingua: English
Title: GRID-CONNECTECD DOUBLE-STAGE AC-AC POWER CONVERTER FOR CSP RENEWABLE ENERGY SYSTEMS
Creators:
CreatorsEmail
Sorrentino, Vincenzovincenzo.sorrentino3@unina.it
Date: 31 March 2015
Number of Pages: 167
Institution: Università degli Studi di Napoli Federico II
Department: Ingegneria Elettrica e delle Tecnologie dell'Informazione
Scuola di dottorato: Ingegneria industriale
Dottorato: Ingegneria elettrica
Ciclo di dottorato: 27
Coordinatore del Corso di dottorato:
nomeemail
Serpico, Claudioserpico@unina.it
Tutor:
nomeemail
Meo, SantoloUNSPECIFIED
Date: 31 March 2015
Number of Pages: 167
Uncontrolled Keywords: power electronics, Sliding Mode Control, renewable energy, double-stage converter, grid-connected converter, current harmonic rejection,
Settori scientifico-disciplinari del MIUR: Area 09 - Ingegneria industriale e dell'informazione > ING-IND/32 - Convertitori, macchine e azionamenti elettrici
Date Deposited: 13 Apr 2015 10:08
Last Modified: 08 Oct 2015 07:19
URI: http://www.fedoa.unina.it/id/eprint/10493
DOI: 10.6092/UNINA/FEDOA/10493

Abstract

In the last years the renewable energy sources have known a state of their advanced diffusion considering their advantages compared to the traditional energy sources like fossil fuels. For this reason the combined heat and power (CHP) plant fueled by renewable sources are widely used. The purpose of this Ph.D. thesis is the design of a new Grid-connected Double-Stage AC-DC/DC-AC Power Converter (DSACPC) for a Concentrating Solar plant for Combined generation of Heat and Power (CS-CHP), that consists of a thermodynamic sub-system fueled by sunlight and an grid-connected electrical sub-system. The thermodynamic sub-system converts the high-temperature heat, achieved using mirrors to concentrate the sun rays to a receiver tube crossed by thermal fluid, into mechanical energy by means of a coupled Organic Rankine Cycle (ORC). Such mechanical energy outlet by turbine is input to electrical sub-system that uses it to generate active and reactive instantaneous power on the grid supply. The main advantages of grid-connected CS-CHP proposed are CO2 emissions operating costs more low and operating costs more content than traditional energy sources, because it use a renewable energy source. However due to some drawbacks like low efficiency of the stream cycle, caused by low operating temperature (400°C for synthetic oil), and high cost of installing (i.e. the Concentrating Solar Plants are much larger than photovoltaic plant), it is necessary maximize efficiency of the electrical sub-system so to maximize the global efficiency of proposed plant. Therefore a new Grid-connected Double-Stage AC-DC/DC-AC Power Converter (DSACPC) with Second-Order Super-Twisting Integral Sliding Mode Control for electrical sub-system is proposed, in order to make competitive the grid-connected CS-CHP in small scale application. The thesis is so structured: in the chapter 1 an overview of CS-CHP systems is given and CSP and thermodynamic sub-systems are described; in the chapter 2 the sliding mode control theory is thoroughly investigated, starting to classical sliding mode control to discrete-time integral sliding mode control and the higher-order sliding mode control; in the chapter 3 the modeling and the design of electrical-subsystem is carried out and the control strategy for DSACPC is presented; the chapter 4 shows the numerical and experimental results to validate the performance of full proposed system.

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