Effect of wind turbine converter control on wind power plant harmonic response and resonances

Luis Sainz; Lluis Monjo; Joaquin Pedra; Marc Cheah-Mane; Jun Liang; Oriol Gomis-Bellmunt

Effect of wind turbine converter control on wind power plant harmonic response and resonances

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Author(s): Luis Sainz ¹ ; Lluis Monjo ² ; Joaquin Pedra ¹ ; Marc Cheah-Mane ³ ; Jun Liang ³ ; Oriol Gomis-Bellmunt ¹
- Affiliations: 1: Department of Electrical Engineering, ETSEIB-UPC, Av. Diagonal 647, Barcelona 08028, Spain ;
  2: Department of Industrial and Design System Engineering, ESTCE, Univ. Jaume I, Av. de Vicent Sos Baynat, s/n, 12071 Castelló de la Plana, Spain ;
  3: School of Engineering, Cardiff University, CF24 3AA, Cardiff, UK
Source: Volume 11, Issue 2, February 2017, p. 157 – 168
DOI: 10.1049/iet-epa.2016.0241 , Print ISSN 1751-8660, Online ISSN 1751-8679

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Received 24/04/2016, Accepted 27/09/2016, Revised 15/07/2016, Published 01/02/2017

Wind turbine harmonic emissions due to power electronics are a well-known power quality concern in wind power plants (WPPs). This problem may be increased by resonances because they amplify harmonic distortion around resonance frequencies. Hence, the resonance phenomenon is widely analysed in the literature. Resonance studies usually consider wind turbines (WTs) as ideal current sources, which can lead to inaccurate results. The study explores the effect of WT converter control on WPP harmonic response. It contributes expressions of WT equivalent harmonic impedance including current control of the grid side converter. This impedance allows WT converter control to be considered in WPP modelling to analyse its effect on harmonic response and resonances. PSCAD and Matlab/Simulink simulations were performed to validate the analytical expressions and illustrate the usefulness of the work in predicting harmonic distortions at WT terminals in actual WPPs.

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