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Energies 2017, 10(7), 870;

Increased Wind Energy Yield and Grid Utilisation with Continuous Feed-In Management

Wind Energy Technology Institute, Flensburg University of Applied Sciences, Kanzleistraße 91-93, Flensburg 24943, Germany
Author to whom correspondence should be addressed.
Academic Editor: Frede Blaabjerg
Received: 16 May 2017 / Revised: 21 June 2017 / Accepted: 23 June 2017 / Published: 28 June 2017
(This article belongs to the Special Issue Wind Turbine 2017)
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This paper presents a study to assess how wind turbines could increase their energy yield when their grid connection point is not strong enough for the rated power. It is state of the art that in such situations grid operators impose feed-in management on the affected wind turbines, i.e., the maximum power is limited. For this study a 5 MW wind turbine is introduced in a small grid that has only limited power transfer capabilities to the upstream power system. Simulations of one particular day are conducted with the electric load, the temperature, and the wind speed as measured on that day. This simulation is conducted twice: once with the 5 MW wind turbine controlled with conventional feed-in management, and a second time when its power is controlled flexibly, i.e., with continuous feed-in management. The results of these two simulations are compared in terms of grid performance, and in terms of mechanical stress on the 5 MW wind turbine. Finally, the conclusion can be drawn that continuous feed-in management is clearly superior to conventional feed-in management. It exhibits much better performance in the grid in terms of energy yield and also in terms of constancy of voltage and temperature of grid equipment. Although it causes somewhat more frequent stress for the wind turbine, the maximum stress level is not increased. View Full-Text
Keywords: feed-in management; flexible infeed; wind power; wind turbine; mechanical stress feed-in management; flexible infeed; wind power; wind turbine; mechanical stress

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Jauch, C.; Gloe, A.; Hippel, S.; Thiesen, H. Increased Wind Energy Yield and Grid Utilisation with Continuous Feed-In Management. Energies 2017, 10, 870.

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