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Control strategy for a SOFC gas turbine hybrid power plant

Henke, Moritz and Steilen, Mike and Näke, Ralf and Heddrich, Marc P. and Friedrich, K. Andreas (2016) Control strategy for a SOFC gas turbine hybrid power plant. 12th European SOFC & SOE Forum, 5.-8.7.2016, Luzern, Schweiz.

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Abstract

Today, gas steam combined cycle plants are the most efficient power plants converting chemical energy into electrical energy with installed powers of usually several hundred MW. They are technologically mature reaching electrical efficiencies of 60 % (based on the lower heating value). Hybrid power plants consisting of solid oxide fuel cells (SOFC) and a gas turbine (GT) can reach higher electrical efficiencies and can be built at lesser installed power. The general concept of a SOFC/GT hybrid power plant is to use the hot SOFC exhaust gases to drive a gas turbine. High electrical efficiencies are achieved if SOFC and gas turbine match well. In the past few years a hybrid power plant with an electrical power output of 30 kW has been designed and is currently under construction at DLR. One challenge concerning the operation of the hybrid power plant is the control of the hybrid system. Stand-alone gas turbines can react comparatively fast to load changes and quickly reach a new stationary operating point. SOFC system temperatures react much slower due to their large thermal capacity. The operating strategy of the hybrid system needs to ensure a safe and reliable operation and allow for high electrical efficiency in a wide power range. Furthermore, dynamic operation like start-up, load changes, shut-down and emergency procedures are also considered. This work will give an overview of the control concept and show how the requirements are met.

Item URL in elib:https://elib.dlr.de/105289/
Document Type:Conference or Workshop Item (Poster)
Title:Control strategy for a SOFC gas turbine hybrid power plant
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Henke, Moritzmoritz.henke (at) dlr.deUNSPECIFIED
Steilen, Mikemike.steilen (at) dlr.deUNSPECIFIED
Näke, Ralfralf.naeke (at) ikts.fraunhofer.deUNSPECIFIED
Heddrich, Marc P.marc.heddrich (at) dlr.deUNSPECIFIED
Friedrich, K. Andreasandreas.friedrich (at) dlr.deUNSPECIFIED
Date:July 2016
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:SOFC, MGT, Regelungskonzept
Event Title:12th European SOFC & SOE Forum
Event Location:Luzern, Schweiz
Event Type:international Conference
Event Dates:5.-8.7.2016
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Fuel cells
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Electrochemical Processes (Fuel Cells) (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Henke, Moritz
Deposited On:20 Jul 2016 08:43
Last Modified:20 Jul 2016 08:43

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