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A Method for Utility Harmonic Impedance Estimation Based on Constrained Complex Independent Component Analysis

Author

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  • Xianyong Xiao

    (College of Electrical Engineering and Information Technology, Sichuan University, Chengdu 610065, Sichuan, China)

  • Xian Zheng

    (College of Electrical Engineering and Information Technology, Sichuan University, Chengdu 610065, Sichuan, China)

  • Ying Wang

    (College of Electrical Engineering and Information Technology, Sichuan University, Chengdu 610065, Sichuan, China)

  • Shuangting Xu

    (College of Electrical Engineering and Information Technology, Sichuan University, Chengdu 610065, Sichuan, China)

  • Zixuan Zheng

    (College of Electrical Engineering and Information Technology, Sichuan University, Chengdu 610065, Sichuan, China)

Abstract

Utility harmonic impedance is an important parameter for harmonic mitigation. In this paper, a method for utility harmonic impedance estimation method based on constrained independent component analysis is proposed. The conventional impedance estimation method based on ComplexICA has two major problems: the algorithm is not suitable for separating weak and strong source mixed signals, and lots of sample data should be provided to avoid converging on a local optimum. To solve the two problems, the prior information of the utility harmonic source is added to the objective function of ComplexICA; in this paper, the measurement data at PCC when the load is shutdown are chosen as the prior information. Then the utility harmonic source signal can be recovered and the separated matrix can be obtained effectively. The connection between the utility harmonic source, utility harmonic impedance and the data at PCC are established using Norton equivalent circuit, and then the separation matrix is used to calculate utility harmonic impedance. The performance and feasibility of the proposed method are verified by the computer simulation and field test. Compared with the current ComplexICA method, the proposed method is more adaptive to changes in the background harmonic and the calculation result is more stable.

Suggested Citation

  • Xianyong Xiao & Xian Zheng & Ying Wang & Shuangting Xu & Zixuan Zheng, 2018. "A Method for Utility Harmonic Impedance Estimation Based on Constrained Complex Independent Component Analysis," Energies, MDPI, vol. 11(9), pages 1-15, August.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:9:p:2247-:d:166011
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    References listed on IDEAS

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    1. Tianlei Zang & Zhengyou He & Yan Wang & Ling Fu & Zhiyu Peng & Qingquan Qian, 2017. "A Piecewise Bound Constrained Optimization for Harmonic Responsibilities Assessment under Utility Harmonic Impedance Changes," Energies, MDPI, vol. 10(7), pages 1-20, July.
    2. Alberto Dolara & Sonia Leva, 2012. "Power Quality and Harmonic Analysis of End User Devices," Energies, MDPI, vol. 5(12), pages 1-14, December.
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    Cited by:

    1. Bin Yang & Kangli Liu & Sen Zhang & Jianfeng Zhao, 2018. "Design and Implementation of Novel Multi-Converter-Based Unified Power Quality Conditioner for Low-Voltage High-Current Distribution System," Energies, MDPI, vol. 11(11), pages 1-21, November.
    2. Yankun Xia & Wenzhang Tang, 2022. "Study on Harmonic Impedance Estimation Based on Gaussian Mixture Regression Using Railway Power Supply Loads," Energies, MDPI, vol. 15(19), pages 1-18, September.
    3. Márcio Arvelos Moraes & Vinícius Henrique Farias Brito & José Carlos de Oliveira, 2022. "An Approach for Determining Voltage Imbalance Contributions Based on Complex Independent Component Analysis," Energies, MDPI, vol. 15(19), pages 1-17, September.

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