Rizqy Averous and Pablo Frack present their research in the IEEE PEDG Conference 2015, Aachen, Germany


Rizqy Averous and Pablo Frack represent the PGS team to present papers in the 6th International Symposium on Power Electronics for Distributed Generation Systems (PEDG 2015) that is this year held in Aachen, Germany. Rizqy Averous introduces the newly developed 4 MW full-size wind turbine test bench in the Center for Wind Power Drives (CWD). Pablo Frack highlights in his presentation the energy supply system for refugee camps from renewable energy sources. Detailed information on both presented topics is provided in the following abstracts of the papers.


Development of a 4 MW Full-Size Wind-Turbine Test Bench

Nurhan Rizqy Averous, Marco Stieneker, Stefan Kock, Cristian Andrei, Alexander Helmedag,
Rik W. De Doncker, Kay Hameyer, Georg Jacobs, Antonello Monti

The in-field validation of wind turbines behavior is very time consuming and cost intensive, especially when fault ride-through (FRT) tests are conducted. Full-size wind-turbine test benches allow a realistic operation of wind turbines in an artificial environment. Due to the independency of wind and grid conditions, the cost and duration of the test program and certification can be reduced. This paper presents the development of 4 MW full-size wind-turbine test bench following a multiphysics hardware in-the-loop (HiL) concept. With the currently installed test bench setup, a synchronization of the device-undertest converters is possible. Through the measurement results of the test programs conducted on the test bench, the capability of the test bench in replicating the field conditions is demonstrated. In addition, a time consuming efficiency measurement can be performed with the reduced duration on the test bench. This shows another main benefit of the test bench compared to the conventional test method for wind turbines.


Renewable Energy Supply of Refugee Camps to Decrease Fuel Consumption and CO2 Emissions

Pablo F. Frack, Pedro E. Mercado, Garikoitz Sarriegui, Rik W. De Doncker

Due to existing conflicts or natural disasters in many different parts of the world, refugee camps are established by different aid organizations in order to provide local humanitarian assistance. Nowadays, these camps are electrically supplied using diesel generators, which are not environmentally friendly and require huge amounts of not easily available fossil fuels. In this sense, Microgrids (MGs) may have an opportunity to provide efficient electrical energy including renewable energy resources. In this paper a refugee camp located in Juba, South Sudan was selected as simulation example. First, the proposed MG to replace the current refugee camp topology and to supply the required electric and heat power is presented. The MG here considered is composed of different commercially available technologies. An economic study of the benefit using this grid configuration is carried out in order to determine the fuel consumption savings due to the use of renewable energy resources based generation technologies. Then, the replacement of diesel by photovoltaic and wind generation results in a reduced system inertia which brings problems related to frequency stability. A control strategy derived from the equations of a synchronous machine is here used to operate converter-coupled units in order to improve the MG frequency stability.