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Energies 2017, 10(11), 1793;

Harmonic Adaptability Remote Testing Method for Offshore Wind Turbines

Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education, Shandong University, Jinan 250061, China
China Electric Power Research Institute, Beijing 100192, China
Author to whom correspondence should be addressed.
Received: 27 September 2017 / Revised: 25 October 2017 / Accepted: 3 November 2017 / Published: 7 November 2017
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Harmonic adaptability (HA) capability is required for large-scale onshore and offshore wind turbines (WTs) connected to the grid. To ensure that the distortion of the harmonic voltage at the grid access point generated by grid simulator is in accordance with the required value, this paper proposes an on-site HA remote testing method for offshore WTs to eliminate submarine cable effects. The deviation compensation method detects the integer harmonic voltage distortion based on instantaneous reactive power theory, and the deviation from the required value is compensated by series active power filter. In order to further reduce the capacity of the designed device, integer harmonics close to the resonant frequency are suppressed by the selective harmonic damping (SHD) method initially. Owing to the attenuation of extreme amplification, the deviation determining the equipment capacity is decreased correspondingly. As a small synthesized impedance working for the selected frequency can suppress the amplification significantly, a low power ratings design for the SHD method can be achieved, and undesired resonance can be avoided. Simulation results indicate that the proposed method can make the harmonic distortion within the error tolerance. View Full-Text
Keywords: harmonic adaptability testing; offshore wind turbines; deviation compensation; selective harmonic damping harmonic adaptability testing; offshore wind turbines; deviation compensation; selective harmonic damping

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Jiang, Z.; Li, C.; Liu, X.; Liu, Y.; Wang, R. Harmonic Adaptability Remote Testing Method for Offshore Wind Turbines. Energies 2017, 10, 1793.

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