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research-article

OPTIMAL OPERATION OF A GAS TURBINE COGENERATION UNIT WITH ENERGY STORAGE FOR WIND POWER SYSTEM INTEGRATION

[+] Author and Article Information
Thomas Bexten

Institute of Power Plant Technology, Steam and Gas Turbines, RWTH Aachen University, Aachen, Germany
bexten@ikdg.rwth-aachen.de

Manfred Wirsum

Institute of Power Plant Technology, Steam and Gas Turbines, RWTH Aachen University, Aachen, Germany
wirsum@ikdg.rwth-aachen.de

Björn Roscher

Chair for Wind Power Drives, RWTH Aachen University, Aachen, Germany
bjoern.roscher@cwd.rwth-aachen.de

Ralf Schelenz

Chair for Wind Power Drives, RWTH Aachen University, Aachen, Germany
Ralf.Schelenz@cwd.rwth-aachen.de

Georg Jacobs

Chair for Wind Power Drives, RWTH Aachen University, Aachen, Germany
georg.jacobs@cwd.rwth-aachen.de

Daniel Weintraub

Institute of Jet Propulsion and Turbomachinery, RWTH Aachen University, Aachen, Germany
weintraub@ist.rwth-aachen.de

Prof.dr. Peter Jeschke

Institute of Jet Propulsion and Turbomachinery, RWTH Aachen University, Aachen, Germany
jeschke@ist.rwth-aachen.de

1Corresponding author.

ASME doi:10.1115/1.4040847 History: Received June 22, 2018; Revised July 05, 2018

Abstract

The inherent volatility and limited predictability of renewable power generation pose various challenges for an efficient system integration of renewable power generation capacities. One approach to manage these challenges is the deployment of small-scale dispatchable power generation and storage units on a local level. In this context, gas turbine cogeneration units can play a significant role if they are equipped with a sufficient energy storage capacity allowing for a more flexible operation. The present study investigates a system configuration which incorporates a heat-driven industrial gas turbine interacting with a wind farm providing volatile renewable power generation. The required energy storage capacity is represented by an electrolyzer and a pressure vessel for intermediate hydrogen storage. The generated hydrogen can be reconverted to electricity and process heat by the gas turbine. The study quantifies the impact of selected system design parameters on the quality of local wind power system integration that can be achieved with a specific set of parameters. In order to conduct these investigations, detailed steady-state models of all required system components were developed. The calculation of the optimal operational strategy is based on an application of the Dynamic Programming algorithm. The simulation results show that the investigated system configuration has the ability to significantly increase the level of local wind power integration. The parameter variation reveals distinct correlations between the main design parameters of the storage system and the achievable level of local wind power integration.

Copyright (c) 2018 by ASME
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