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Power quality is an important issue for wave energy developers, as the wave energy converters output power profile can present fluctuations in the range of seconds, due to the oscillatory nature of the ocean waves. The impact of these devices on the electric grid hence needs to be investigated for wave farms to be connected to the grid. In order to emulate an operating direct drive wave energy converter,...
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...
A transformer based voltage sag generator to test renewable energy systems is presented. Design considerations concerning overvoltages and overcurrents during switching action are addressed. Measurement results of a 30 kW laboratory prototype testing a line side PWM converter and a DFIG are presented. Both measurement results for investigations on the transformer based sag generator at the line side...
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