Secondary Harmonic Emission in Wind Power Plants

Document identifier: oai:DiVA.org:ltu-76908
Access full text here:10.1109/PTC.2019.8810411
Keyword: Engineering and Technology, Electrical Engineering, Electronic Engineering, Information Engineering, Other Electrical Engineering, Electronic Engineering, Information Engineering, Teknik och teknologier, Elektroteknik och elektronik, Annan elektroteknik och elektronik, Power quality, Power-system harmonics, Wind power generation, Electric Power Engineering, Elkraftteknik
Publication year: 2019
Relevant Sustainable Development Goals (SDGs):
SDG 7 Affordable and clean energySDG 11 Sustainable cities and communitiesSDG 13 Climate action
The SDG label(s) above have been assigned by OSDG.ai

Abstract:

The harmonic emission of wind power plants into the public grid is an important part of studies for connecting such plants to the power system. However, the transfer of emission between individual wind turbines within the collection grid is normally not considered. Neither are different grid impedance scenarios considered. This transfer is one of the types of secondary emission that needs to be considered for a complete picture of harmonics in wind power plants. In this paper, a study after the importance of the secondary emission in wind power plants is presented. The impact of the grid impedance on this emission is also considered. For this, the current transfer and the transfer admittance functions were used in two wind power plants, with five and 42 wind turbines each. From the results, it was possible to estimate the secondary emission contribution from the wind turbines and estimate the impact of the grid impedance. The grid impedance has shown to have an important impact on the secondary emission for wind turbines. The harmonic transfer between wind turbines is shown to be considerable. It can vary from 15% to 70%, for the wind power plant with five wind turbines. For the 42 wind turbines case, it can vary from 2% to 14%, assuming current emission, and, from 0.48% to 3.32%, assuming a voltage source for the emission.

Authors

Daphne Schwanz

Luleå tekniska universitet; Energivetenskap
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Math Bollen

Luleå tekniska universitet; Energivetenskap
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Anders Larsson

Luleå tekniska universitet; Energivetenskap
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