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

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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)

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.

Suggested Citation

  • Youngho Cho & Choongman Lee & Kyeon Hur & Yong Cheol Kang & Eduard Muljadi & Sang-Ho Park & Young-Do Choy & Gi-Gab Yoon, 2016. "A Framework to Analyze the Stochastic Harmonics and Resonance of Wind Energy Grid Interconnection," Energies, MDPI, vol. 9(9), pages 1-16, August.
    • Handle: RePEc:gam:jeners:v:9:y:2016:i:9:p:700-:d:77040
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    References listed on IDEAS

    as
    1. Jen-Hao Teng & Rong-Ceng Leou & Chuo-Yean Chang & Shun-Yu Chan, 2013. "Harmonic Current Predictors for Wind Turbines," Energies, MDPI, vol. 6(3), pages 1-15, March.
    2. Guang-Long Xie & Bu-Han Zhang & Yan Li & Cheng-Xiong Mao, 2013. "Harmonic Propagation and Interaction Evaluation between Small-Scale Wind Farms and Nonlinear Loads," Energies, MDPI, vol. 6(7), pages 1-26, July.
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    Cited by:

    1. Youngho Cho & Kyeon Hur & Yong Cheol Kang & Eduard Muljadi, 2017. "Impedance-Based Stability Analysis in Grid Interconnection Impact Study Owing to the Increased Adoption of Converter-Interfaced Generators," Energies, MDPI, vol. 10(9), pages 1-17, September.
    2. Shin-Yeu Lin & Ai-Chih Lin, 2016. "Risk-Limiting Scheduling of Optimal Non-Renewable Power Generation for Systems with Uncertain Power Generation and Load Demand," Energies, MDPI, vol. 9(11), pages 1-16, October.

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