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Power conversion systems in single-phase photovoltaic applications depend on DC-link capacitors, which are among the most failure-prone components in power electronics. To enhance system reliability and support preventive maintenance, this study addresses the need for accurate, non-intrusive monitoring of DC-link capacitance. We hypothesize that the 120 Hz ripple component of the DC-link voltage can be used to estimate capacitance in real time without requiring additional hardware or system interruption. A novel frequency-domain method based on the Goertzel algorithm is proposed to extract the ripple component effi ciently, off ering lower computational complexity than conventional FFT-based approaches. Simulation and experimental validation on a 1.12 kW single-phase PV system demonstrate high accuracy, with percentage relative errors below 1.85% and maximum relative errors under 3.86%. The results confi rm that the proposed method provides a practical, accurate, and cost-eff ective solution for real-time DC-link capacitor monitoring in PV and other power electronic systems.

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기사명 저자명 페이지 원문 목차
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Two-tier optimal scheduling of air-conditioning virtual energy storage combined cooling, heating, and power microgrids considering demand response Mengran Zhou, Xiangnan Sun, Feng Hu, Ziwei Zhu, Kun Wang, Chunchen Shi, Mengcheng Zhou, Yu Zhang, Yuewen Zhang, Lehan Zhang p. 29-53
Robust optimal scheduling of microgrid based on data-driven segmented power multi-interval uncertainty sets Guodong Wang, Guoqiang Zheng, Zhonge Su, Miaosen Hu, Lingrui Kong p. 55-69
Optimization scheduling of wind-nuclear-storage combined power systems considering offshore wind power uncertainty : a computational intelligence algorithm-based solution method Dawei Chen, Guojun Bao, Ye Tian, Zhijie Zeng, Zhicheng Li, Yuan Wei, Yatao Lin p. 71-97
(A) distributed optimal dispatch strategy for virtual power plants considering DoS attacks based on neural dynamic optimization Jinglu Liu, Jianghong Liu, Xingyu Qu, Ruobing Wang, Yunfei Wang p. 99-115
Hybrid feature fusion with a stacking classifier for accurate high-voltage equipment identification Ebru Ergün, Muhammed Domac p. 117-130
Hosting capacity evaluation method of renewable energy : feasible region and mapping costs Wei Dai, Jingyi Zhao, Dewen Li, Bochen Shi p. 131-145
Enhancing short -term electricity forecasting with advanced machine learning techniques Di Cui, Ambe Harrison, Emmanuel Fendzi-Donfack, Idriss Dagal, Pradeep Jangir, Mohamed Metwally Mahmoud, Pankaj Malkani, Wulfran Fendzi Mbasso, Pierre Tiako, Aseel Smerat p. 147-187
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Impact of inner-loop control structures on harmonic stability of grid-forming converters and damping suppression strategies Jianming Su, Haizhen Xu, Deyu Zhu, Changzhou Yu, Wenguang Zhao, Xiaoming Wang p. 281-297
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Efficiency map-based optimal design and experimental validation of rib-less IPMSMs using multi-stage deep transfer learning considering PWM harmonic effects DoHyun Jang, Seok-Won Jung, Hye-Won Yang, In-Seok Song, Taek-Hyo Nam, Jin Hwan Lee, Sang-Yong Jung p. 393-414
Sensorless control of permanent magnet synchronous motors considering multiple-saliencies effects Yalu Mu, Fei Xiao, Jilong Liu, Zhiqin Mai, Shun Li, Kefeng Li p. 415-431
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DC-link capacitance estimation using 120 Hz ripple voltage detection based on frequency analysis Shin Yong-Jin, Baek Min-Jae, Lee Woo-Cheol p. 481-491
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Temperature prediction method of permanent magnet motor based on GNN-LSTM and lumped parameter thermal network Pin Lv, Zehua Shang, Ning Wang, Jinming Fu, Chenxi Zhang p. 633-645
Analysis and optimization of electromagnetic characteristics of asymmetric V-shaped interior permanent magnet synchronous motor Zhihong Wu, Dongxiong Wang, Yanxin Zhao, Ju Zhang, Xianju Yuan, Baohua Wang p. 647-666
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SCAPS-1D simulation of lead-free BaZrS3 perovskite as an ecofriendly absorber material for high-performance solar cells Syed M. Hasnain p. 859-868
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DGA fault diagnosis method based on Gaussian copula data augmentation and transfer learning Hao Tang, Chang Liu, Xiang Zhang, Xiaoqing Li, Xiaofei Zhang p. 899-916
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(Correction) Analysis and optimization of electromagnetic characteristics of asymmetric V-shaped interior permanent magnet synchronous motor Zhihong Wu, Dongxiong Wang, Yanxin Zhao, Ju Zhang, Xianju Yuan, Baohua Wang p. 1243
(Publisher Correction) Re-detection module to mitigate tracklet fragmentation in autonomous driving Jihyeon Baek, HyeonChyeol Hwang, Tae-Yong Kuc, Jaeho Kwak p. 1245

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