Home Journals Articles Updates About
CN
image
收藏切换
Non-static Error Single-phase Harmonic Extraction Observer
收藏切换
Yongxiang CAI1, Yang WANG1, Wei LI2, Guangze OUYANG1, Hao BAI  Senior Member, CPSS2, Xiaomeng HE3
Journal of Power Supply | 2025, 23(7) : 55 - 64
Less
收藏切换
Journal of Power Supply | 2025, 23(7): 55-64
• Modeling and Control •
Non-static Error Single-phase Harmonic Extraction Observer
Full
Yongxiang CAI1, Yang WANG1, Wei LI2, Guangze OUYANG1, Hao BAI  Senior Member, CPSS2, Xiaomeng HE3
Affiliations
  • 1.Electric Power Research Institute, Guizhou Power Grid Co., Ltd., Guiyang 550002, China
  • 2.CSG Electric Power Research Institute Co., Ltd., Guangzhou 510663, China
  • 3.Guiyang Power Supply Company, Guizhou Power Grid Co., Ltd., Guiyang 550004, China
Published: 2025-11-30 doi: 10.13234/j.issn.2095-2805.2025.7.55
Outline
收藏切换

The rapid and accurate acquisition of harmonic components in the output waveforms from power grid or inverters is of significance for inverter control and harmonic compensation. However, the commonly used method of second-order generalized integrator (SOGI) suffers from the problem of resonance point offset during the discretization process, which affects the separation and extraction accuracy. To solve this question, a technique of non-static error harmonic extraction observer (HEO) which can rapidly and accurately separate and extract harmonics is proposed, whose implementation process can be directly equated to a set of second-order difference equations with a simple structure and easy digital implementation. The principle and performance of the proposed HEO are analyzed in detail, and its performance is compared with that of the conventional SOGI method. Meanwhile, in order to avoid the phenomenon of mutual interference during the observation of multiple harmonics, a cross-suppressed modified HEO method is further put forward, and the corresponding implementation principle and structure are discussed in depth. Finally, the simulation and experimental results of a singlephase system show that the proposed HEO can quickly and accurately separate and extract the fundamental wave and each harmonic component in the single-phase system, with advantages of fast response and small observation deviation.

Harmonic extraction observer (HEO)  /  Bode plot  /  second-order generalized integrator (SOGI)  /  cross-suppressed structure  /  harmonic separation
蔡永翔, 王扬, 李巍, 欧阳广泽, 白浩中国电源学会高级会员, 何肖蒙. 一种无静差单相谐波观测器. 电源学报, 2025 , 23 (7) : 55 -64 . DOI: 10.13234/j.issn.2095-2805.2025.7.55
Yongxiang CAI, Yang WANG, Wei LI, Guangze OUYANG, Hao BAI, Xiaomeng HE. Non-static Error Single-phase Harmonic Extraction Observer[J]. Journal of Power Supply, 2025 , 23 (7) : 55 -64 . DOI: 10.13234/j.issn.2095-2805.2025.7.55
Funding
Less
  • Guizhou Provincial Science and Technology Projects(黔科合支撑[2022]一般012)
  • Key Science and Technology Projects of China Southern Power Grid Corporation(GZKJXM20220043)
Appendix
Less
Year 2025 volume 23 Issue 7
55
5
Cite this Article
BibTeX
Article Info
doi: 10.13234/j.issn.2095-2805.2025.7.55
  • Receive Date：2023-06-21
  • Online Date：2026-10-26
  • Published：2025-11-30
Article Data
Affiliations
History
  • Received：2023-06-21
  • Revised：2023-08-21
  • Accepted：2023-09-26
Funding
Guizhou Provincial Science and Technology Projects(黔科合支撑[2022]一般012)
Key Science and Technology Projects of China Southern Power Grid Corporation(GZKJXM20220043)
Affiliations
    1.Electric Power Research Institute, Guizhou Power Grid Co., Ltd., Guiyang 550002, China
    2.CSG Electric Power Research Institute Co., Ltd., Guangzhou 510663, China
    3.Guiyang Power Supply Company, Guizhou Power Grid Co., Ltd., Guiyang 550004, China
References
Share
https://castjournals.cast.org.cn/joweb/dyxb/EN/10.13234/j.issn.2095-2805.2025.7.55
Share to
QR

Scan QR to access full text

Cite this article
BibTeX
Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
关闭全屏
  • BibTeX
  • EndNote
  • RefWorks
  • TxT
Links
Articles
Latest Articles
Most Read
Collections
Updates
Events
News
Multimedia
About
About Us
Contact
No. 86 Xueyuan South Road, Haidian District, Beijing
100081
010-62662699(Operation and Technical Support)
qkjq@cast.org.cn

Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House