Title :
Stand-alone and grid-connected operation of fuel cell
Author :
Crosson, C.R. ; Saha, A.K. ; Ijumba, N.M. ; Chetty, L. ; Chikuni, E.
Author_Institution :
Univ. of KwaZulu-Natal, Durban, South Africa
Abstract :
In this paper, a dynamic model of solid-oxide fuel cell (SOFC) having a power rating of 30 kW has been presented and implemented in PSCAD software. The SOFC system comprises a fuel cell (FC) stack and power conditioner, which comprises of a dc-dc boost converter and dc-ac inverter. The system also incorporates a Pi-controller to maintain output voltage of dc-dc boost converter at a desired level when there is a change in FC output voltage due to change in current supplied by it. Pulse width modulation (PWM) switching technique has been utilized for boost converter and inverter operation. The model has been tested for stand-alone and grid-connected operation and its load following performances. The model has also been tested under fault conditions on the grid-side. The simulation results obtained has been presented with analysis.
Keywords :
DC-AC power convertors; DC-DC power convertors; PI control; PWM power convertors; power grids; power system CAD; power system control; solid oxide fuel cells; switching convertors; PSCAD software; Pi-controller; dc-ac inverter; dc-dc boost converter; dynamic model; fault conditions; fuel cell stack; grid-connected operation; power 30 kW; power conditioner; pulse width modulation switching; solid-oxide fuel cell; stand-alone operation; Fuel cell; dynamic model; grid-connected operation; inverter;
Conference_Titel :
Renewable Power Generation (RPG 2011), IET Conference on
Conference_Location :
Edinburgh
DOI :
10.1049/cp.2011.0113
