A Framework to Analyze the Stochastic Harmonics and Resonance of Wind Energy Grid Interconnection

Youngho Cho, Choongman Lee, Kyeon Hur, Yong Cheol Kang, Eduard Muljadi, Sang-Ho Park, Young-Do Choy and Gi-Gab Yoon
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Youngho Cho: School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Korea
Choongman Lee: School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Korea
Kyeon Hur: School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Korea
Yong Cheol Kang: Department of Electrical Engineering, Chonbuk National University, Jeonju 54896, Korea
Eduard Muljadi: National Renewable Energy Laboratory, Golden, CO 80401, USA
Sang-Ho Park: Korea Electric Power Research Institute, Daejeon 34056, Korea
Young-Do Choy: Korea Electric Power Research Institute, Daejeon 34056, Korea
Gi-Gab Yoon: Korea Electric Power Research Institute, Daejeon 34056, Korea

Energies, 2016, vol. 9, issue 9, 1-16

Abstract: This paper addresses a modeling and analysis methodology for investigating the stochastic harmonics and resonance concerns of wind power plants (WPPs). Wideband harmonics from modern wind turbines (WTs) are observed to be stochastic, associated with real power production, and they may adversely interact with the grid impedance and cause unexpected harmonic resonance, if not comprehensively addressed in the planning and commissioning of the WPPs. These issues should become more critical as wind penetration levels increase. We thus propose a planning study framework comprising the following functional steps: First, the best fitted probability density functions (PDFs) of the harmonic components of interest in the frequency domain are determined. In operations planning, maximum likelihood estimations (MLEs) followed by a chi-square test are used once field measurements or manufacturers’ data are available. Second, harmonic currents from the WPP are represented by randomly-generating harmonic components based on their PDFs (frequency spectrum) and then synthesized for time domain simulations via inverse Fourier transform. Finally, we conduct a comprehensive assessment by including the impacts of feeder configurations, harmonic filters and the variability of parameters. We demonstrate the efficacy of the proposed study approach for a 100-MW offshore WPP consisting of 20 units of 5-MW full converter turbines, a realistic benchmark system adapted from a WPP under development in Korea and discuss lessons learned through this research.

Keywords: wind power plant (WPP); harmonics; resonance; statistical modeling (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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