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Status Quo and Prospects of Researches on Load Equivalent Impedance Parameters in Nonlinear Load Analysis
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Yi ZHANG, Yanyi KANG, Zonghua ZHENG
Journal of Power Supply | 2025, 23(3) : 76 - 85
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Journal of Power Supply | 2025, 23(3): 76-85
• Special Issue on Analysis and Control of Power Quality in New Power Systems •
Status Quo and Prospects of Researches on Load Equivalent Impedance Parameters in Nonlinear Load Analysis
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Yi ZHANG, Yanyi KANG, Zonghua ZHENG
Affiliations
  • College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China
Published: 2025-05-30 doi: 10.13234/j.issn.2095-2805.2025.3.76
Outline
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With the rapid development of new energy and power electronics technologies, the proportion of nonlinear loads in power systems is increasingly growing, leading to more severe power quality issues in power grid. The identification of load equivalent impedance parameters is one of the important methods for analyzing the characteristics of nonlinear loads. The status quo of researches on the load equivalent impedance parameter technology and its application fields is systematically sorted out, and the research directions and application trends in the future are forecasted. First, the basic principle for load equivalent impedance parameters is elaborated upon. Second, the existing load equivalent impedance parameter identification methods are analyzed, and the accuracy, applicable scope, advantages and disadvantages of different parameter identification methods are pointed out. Third, the applications of load equivalent impedance parameters in harmonic analysis and instantaneous reactive power calculation are reviewed. Finally, further research directions for load equivalent impedance parameters are discussed, and the prospects for extended applications beyond the fields at present are given.

Load equivalent impedance parameter  /  nonlinear load  /  parameter identification  /  harmonic source identification  /  harmonic source localization and responsibility division
张逸, 康燕艺, 郑宗华. 负荷等值阻抗参数在非线性负荷分析中的研究现状及展望. 电源学报, 2025 , 23 (3) : 76 -85 . DOI: 10.13234/j.issn.2095-2805.2025.3.76
Yi ZHANG, Yanyi KANG, Zonghua ZHENG. Status Quo and Prospects of Researches on Load Equivalent Impedance Parameters in Nonlinear Load Analysis[J]. Journal of Power Supply, 2025 , 23 (3) : 76 -85 . DOI: 10.13234/j.issn.2095-2805.2025.3.76
Funding
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  • National Natural Science Foundation of China(51777035)
Appendix
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Year 2025 volume 23 Issue 3
75
19
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Article Info
doi: 10.13234/j.issn.2095-2805.2025.3.76
  • Receive Date：2024-12-07
  • Online Date：2026-10-26
  • Published：2025-05-30
Article Data
Affiliations
History
  • Received：2024-12-07
  • Revised：2025-01-08
  • Accepted：2025-02-05
Funding
National Natural Science Foundation of China(51777035)
Affiliations
    College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China
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