05. - 07.06.2018
PCIM Europe 2018
Power Electronics | Intelligent Motion | Renewable Energy | Energy Management


Poster Session

Renewable Energy and Power Transmission


Tuesday, 05.06.2018, 15:15 - 17:30 hrs


Philip Kjaer, Vestas Wind Systems, DK


15:15 A Sliding-Mode Observer for Encoderless Direct Model Predictive Control of PMSGs
M.Sc. Mohamed Abdelrahem, Technical University of Munich, München, Deutschland
This paper presents a study of a sensorless control strategy for permanent-magnet synchronous generators (PMSGs) based variable-speed wind turbines (VSWTs). The proposed method is based on a sliding-mode observer (SMO), which estimates the position and speed of the rotor from the back electro-motive force (EMF). To overcome the chattering problem, an adaptive sigmoid function is used. Simulation and experimental results are presented.
15:15 Wind Turbine Nacelle Test Bench Using an Optimized Torque Control and an Aerodynamic Real Time Model
Dipl.-Ing. Sören Behrens, University of Bremen, Bremen, Deutschland
A wind turbine nacelle test bench was developed. This test bench consists of the complete nacelle of a wind turbine, an optimized torque-controlled TFM drive and a new real-time model of the aerodynamics to realize the same dynamic behavior as at the real plant. In parallel a second wind turbine of the same type was constructed in the open field for later verifications. The benefits of the test bench will be discussed, the design will be explained and the operation presented.
15:15 Wind Turbine for Underground Subway Stations
Lilia Galai Dol, Efficacity, Champs Sur Marne, Frankreich
In urban railway stations , the piston effect, caused by the train pushing air, is very pronounced in railway tunnels and is the cause for equipment mechanical stress leading some of them to an over consumption. This effect can be seen like a wind flowand and can be used to generate electricity an add to a microgrid. This solution will be developed and discussed regarding global efficiency, complexity and control issues. A test bench at reduced scale in laboratory, which emulate the wind turbine system, will be developed.
15:15 Assisting Passive AI Proposal for VC-VSIs
B.Sc. Cristian Chillón-Antón, CITCEA-UPC, Barcelona, Spanien
This paper exposes the ineffectiveness of passive algorithms when are used in VSIs behaving as a voltage source. And then, proposes a power control error based solution, making evident the islanding detection under non-zero power flow, combined with monitoring the micro-grid area to avoid zero power flow situations that make islanding detection unfeasible.
15:15 Evaluation of DC-to-DC-Converter Impedance Passivity Using Pseudo-Random Test Signals
Dipl.-Ing. Leopold Ott, Fraunhofer Institute IISB, Erlangen, Deutschland
A detailled design procedure for droop controlled power sources in low-voltage DC micro grids yielding optimized dynamic performance and system-level stability is outlined. The basic approach is broadened to cover various source converter types taking specific effects like the right half plane zero in boost-type converters into account. To verify the design procedure, a frequency domain measurement approach using pseudo-random test signals is described and used on exemplary converter systems.
15:15 Solving Isolation- and Power Supply Problems for Current Monitoring in High Voltage Power Line Application
Dr.-Ing. Bernhard Strzalkowski, Analog Devices, München, Deutschland
Power transmission systems have evolved into vast interconnected power delivery networks that link multiple generators and loads. The system must monitor individual branches of the grid and quickly locate fault condition for quickly recovering operation. Fault indicator system is composed of functional blocks: energy harvesting, power management, processor, analog front-end and com­munication interfaces. The most important requirements are high reliability, fast communication interface, efficient energy harvesting, low power consumption.
15:15 Zero Vector Placement Strategies in Space Vector Modulation of Inverters for UPS Applications
M.Eng. Lorenzo Giuntini, GE Consumer & Industrial, Riazzino, Schweiz
Space Vector Modulation is a popular technique for driving power converters. Alternative switching sequences may optimize power losses and affect harmonic content.When SVM is used in UPS applications, power losses are of particular interest, as most UPS installations are energy-intensive. This paper reviews alternative switching strategies for UPS inverters, evaluating power losses and side effects. The analysis is supported by experimental measurements on high power double-conversion UPS.


Speaker detail

Mr. Mohamed Abdelrahem
M.Sc. Mohamed Abdelrahem
Technical University of Munich, München, Deutschland
Mohamed Abdelrahem received the B.Sc. (with honors) and M.Sc. degrees in electrical engineering from Assiut University, Egypt, in 2007 and 2011, respectively. Since 2014, he has been working toward the Ph.D. degree at the Institute for Electrical Drive Systems and Power Electronics (EAL), Technical University of Munich (TUM), Germany. His research interests include power electronics, predictive and encoderless control of variable-speed wind generators, photovoltaic energy systems, and energy storage systems.
Herr Sören Behrens
Dipl.-Ing. Sören Behrens
University of Bremen, Bremen, Deutschland
Sören Behrens received the diploma in electrical Engineering from the University of Bremen in 2015. Currently he works as research assistant for the Institute for Electrical Drives, Power Electronics and Devices (IALB) at the University of Bremen. His research field is wind energy.
Mr. Cristian Chillón-Antón
B.Sc. Cristian Chillón-Antón
CITCEA-UPC, Barcelona, Spanien
Cristian Chillón-Antón received the M.Sc. degree in Industrial Engineering from "Barcelona School of Industrial Engineering - Universitat Politčcnica de Catalunya" in 2012. Since 2012, he is working in CITCEA-UPC as project engineer developing tasks focused in design of algorithms related to the control of grid-connected inverters, active filters and microgrids. His main research interest are control of power electronics and microgrids.
Lilia Galai Dol
Efficacity, Champs Sur Marne, Frankreich
GALAI DOL Lilia received the Electrical Engineer degree from ENSEEIHT at Toulouse, France, in 2009 and the PhD degree in electrical engineering with the SATIE laboratory, ENS Cachan in France in 2014,
She is currently with the "pole gare" Group of the French research institute "Efficacity" for the energy transition.
Her research interests include power electronics and optimization studies centred to urban station for new energy grid solutions.
Mr. Lorenzo Giuntini
M.Eng. Lorenzo Giuntini
GE Consumer & Industrial, Riazzino, Schweiz
Mr Lorenzo GIUNTINI is as a Senior Engineer at GE CRITICAL POWER in RIAZZINO, SWITZERLAND. His main focus is on Uninterruptible Power Supplies (UPS). He authored a number of papers and holds various patents and applications in the area of power converter operation and control. He graduated in 1995 from the University of Bologna (Italy) with a Master Degree in Electronic Engineering. He also earned an MBA at University of Bologna (Italy) in 2005.
Herr Leopold Ott
Dipl.-Ing. Leopold Ott
Fraunhofer Institute IISB, Erlangen, Deutschland
Leopold Ott studied electrical engineering at Munich University of Technology with special emphasis on power supply sytems. He received his diploma in 2012. Since then, he works for Fraunhofer Institute for Integrated Systems and Device Technology as a design engineer for power electronic systems at the energy electronics department. His research interests include modelling of dynamically interacting multi-converter systems and designing DC-to-DC converter systems, both with special focus on low-voltage DC micro grids.
Dr. Bernhard Strzalkowski
Dr.-Ing. Bernhard Strzalkowski
Analog Devices, München, Deutschland
Bernhard Strzalkowski studied received the Dipl.-Ing. degree in electrical engineering/University Karlsruhe, Germany in 1989. In 2003 he received the Ph.D. degree in electronics/Silesian University, Gliwice. From 1997 to 2008 he joined Siemens/Infineon Munich. Since 02.2009 he has join Analog Devices/Munich, is responsible for development and application of next-generation digital power technology. He is an author of several technical papers, among others presented at IEEE, PCIM, ECPE, ETG.