EPE Association: EPE 2011 - LS8b: Topic 14: Testing of the generator converters and wave power generation

EPE 2011 - LS8b: Topic 14: Testing of the generator converters and wave power generation
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2011 ECCE Europe - Conference > EPE 2011 - Topic 14: Converters for rotating and linear generators > EPE 2011 - LS8b: Topic 14: Testing of the generator converters and wave power generation

   [return to parent folder]

   Full-power converter based test bench for low voltage ride-through testing of wind turbine converters
By Riku PÖLLÄNEN, Lasse KANKAINEN, Mikko PÄÄKKÖNEN, Jaakko OLLILA, Stefan STRANDBERG [View]
[Download]

Abstract: This paper describes a full-power converter based test bench to generate voltage sags for fault ride-through (FRT) testing of the full-power converter based wind turbine drive. Principles of the test bench control and the generation of different types of voltage dips are explained. Proposed test bench is also briefly compared with the shunt impedance based voltage dip generation system in terms of features and operation. Finally, measurement results from LVRT tests using a 1.8 MVA full-scale test bench are shown.

   Laboratory tests of linear electric machines for wave energy applications with emulation of wave energy converters and sea waves
By Marcos BLANCO, Marcos LAFOZ, Luis GARCÍA-TABARÉS [View]
[Download]

Abstract: As in other renewable and non-controllable sources of energy, in the case of ocean wave energy the use of electrical linear generator as direct drive power take-off (PTO) in a wave energy converter (WEC) provides several advantages such as improvements in the versatility of control, in the robustness and in the efficiency for a wide range of loads. This paper describes a laboratory test facility of linear electric machines which work as direct-drive PTO in WEC and the obtained results in the case of a Linear Wave Energy Generator based on a linear switched reluctance machine (LSRM). The lab testing scheme does not use external hydraulic or pneumatic actuators but splits the coils of the LSRM in two parts (two sub-machines) controlling them by means of two power electronics converters. This configuration does not permit testing the nominal power, force nor velocity of the LSRM but does permit controlling one sub-machine as WEC emulator and the other as the generator also permits testing and comparing different strategies of wave energy capture. LSRM tests under realistic ocean conditions, such as irregular waves, will also be possible with this method.

   LIFETIME INVESTIGATION OF HIGH POWER IGBT MODULES
By Jens DUE, Stig MUNK-NIELSEN, Rasmus NIELSEN [View]
[Download]

Abstract: This article concerns lifetime investigation of high power IGBT modules. Other research investigating windturbine failures of modern wind turbines observed that the power converter counts for 15 \% of all failures. A test bench capable of testing the IGBT power modules in an accelerated application specific working point was constructed. The working point was given with regards to voltage, current, power and phase.An analysis of failure mechanisms in modern IGBT modules was conducted. From this it was concluded that $V\low{CE}$ of the IGBTs can be used as an indication of wear out of an IGBT module. Through circuit analysis and other studies it was concluded that a change of around 30 mV was to be expected.VCE of the IGBTs and VD of the diodes with high accuracy was implemented.

EPE 2011 - LS8b: Topic 14: Testing of the generator converters and wave power generation
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2011 ECCE Europe - Conference > EPE 2011 - Topic 14: Converters for rotating and linear generators > EPE 2011 - LS8b: Topic 14: Testing of the generator converters and wave power generation
	[return to parent folder]

	Full-power converter based test bench for low voltage ride-through testing of wind turbine converters By Riku PÖLLÄNEN, Lasse KANKAINEN, Mikko PÄÄKKÖNEN, Jaakko OLLILA, Stefan STRANDBERG	[View] [Download]
Abstract: This paper describes a full-power converter based test bench to generate voltage sags for fault ride-through (FRT) testing of the full-power converter based wind turbine drive. Principles of the test bench control and the generation of different types of voltage dips are explained. Proposed test bench is also briefly compared with the shunt impedance based voltage dip generation system in terms of features and operation. Finally, measurement results from LVRT tests using a 1.8 MVA full-scale test bench are shown.

	Laboratory tests of linear electric machines for wave energy applications with emulation of wave energy converters and sea waves By Marcos BLANCO, Marcos LAFOZ, Luis GARCÍA-TABARÉS	[View] [Download]
Abstract: As in other renewable and non-controllable sources of energy, in the case of ocean wave energy the use of electrical linear generator as direct drive power take-off (PTO) in a wave energy converter (WEC) provides several advantages such as improvements in the versatility of control, in the robustness and in the efficiency for a wide range of loads. This paper describes a laboratory test facility of linear electric machines which work as direct-drive PTO in WEC and the obtained results in the case of a Linear Wave Energy Generator based on a linear switched reluctance machine (LSRM). The lab testing scheme does not use external hydraulic or pneumatic actuators but splits the coils of the LSRM in two parts (two sub-machines) controlling them by means of two power electronics converters. This configuration does not permit testing the nominal power, force nor velocity of the LSRM but does permit controlling one sub-machine as WEC emulator and the other as the generator also permits testing and comparing different strategies of wave energy capture. LSRM tests under realistic ocean conditions, such as irregular waves, will also be possible with this method.

	LIFETIME INVESTIGATION OF HIGH POWER IGBT MODULES By Jens DUE, Stig MUNK-NIELSEN, Rasmus NIELSEN	[View] [Download]
Abstract: This article concerns lifetime investigation of high power IGBT modules. Other research investigating windturbine failures of modern wind turbines observed that the power converter counts for 15 \% of all failures. A test bench capable of testing the IGBT power modules in an accelerated application specific working point was constructed. The working point was given with regards to voltage, current, power and phase.An analysis of failure mechanisms in modern IGBT modules was conducted. From this it was concluded that $V\low{CE}$ of the IGBTs can be used as an indication of wear out of an IGBT module. Through circuit analysis and other studies it was concluded that a change of around 30 mV was to be expected.VCE of the IGBTs and VD of the diodes with high accuracy was implemented.