Modelling, Design and Control of a Single Phase Solid Oxide Fuel Cell based Power System

Öz

In an industrial power generation, power conversion is a significantly important concern. The power

flow is seamless transmitted from fuel cell (FC) to electric grid through power converter components. This paper

presents modelling and simulation of grid connected FC system. One of the most important types of FCs is that

solid oxide fuel cell (SOFC) which has high-temperature technology, and fuel-flexible economic entitlement has

been selected. The interconnection of the SOFC with a DC-DC converter and a DC-AC inverter for interfacing

with the electric grid are modelled and simulated. DC-DC Boost converter is controlled by current and voltage

based cascaded PI controller. Single phase adaptive filter based phase-locked loop (PLL) algorithm and pulse

width modulation (PWM) is used for control of single phase DC-AC inverter. The simulation results show that

the adaptive filter-PLL based control strategy is implemented for the control and synchronizing of the single phase

electric grid connected SOFC system, successfully. All system components are developed by PSCAD/EMTDC

simulation software.

Anahtar Kelimeler

• Adaptive filter,PLL,single phase inverter,solid oxide fuel cell

Tek Fazlı Katı Oksit Yakıt Hücresi tabanlı Güç Sisteminin Modellenmesi, Tasarlanması ve Kontrolü

Öz

Endüstriyel bir enerji üretiminde, güç dönüşümü önemli bir ilgi konusudur. Güç akışı, güç dönüştürücü

bileşenleri tarafından yakıt hücresinden (YH) elektrik şebekesine kesintisiz olarak iletilir. Bu çalışmada, şebekeye

bağlı YH sisteminin modellenmesi ve benzetim çalışması sunulmaktadır. Yüksek sıcaklık teknolojisine ve esnek

yakıt ekonomisine sahip en önemli YH’ den biri olan katı oksit yakıt hücresi (KOYH) seçilmiştir. KOYH’ yi elektrik

şebekesine bağlanmak için bir DA-DA dönüştürücü ve bir DA-AA evirici ile ara bağlantıları modellenmiş ve

benzetim çalışması yapılmıştır. DA-DA yükseltici dönüştürücü, akım ve gerilim tabanlı artarda bağlanmış oransal

integral (OI) ile kontrol edilmiştir. Tek fazlı DA-AA eviricinin kontrolü için tek fazlı uyarlanabilir süzgeç- faz

kilitlemeli döngü (FKD) tabanlı kontrol stratejisi ve darbe genişlik modülasyonu (DGM) kullanılmıştır. Benzetim

sonuçları, uyarlanabilir süzgeç-FKD tabanlı kontrol stratejisinin, tek fazlı elektrik şebekesine bağlı KOYH

sisteminin kontrolü ve senkronizasyonu için başarıyla uygulandığını göstermektedir. Sistemin tüm bileşenleri

PSCAD/EMTDC benzetim programı ile geliştirilmiştir.

Anahtar Kelimeler

• FKD,katı oksit yakıt hücresi,tek fazlı evirici,uyarlamalı süzgeç

Kaynakça

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