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学者姓名：郭谋发
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Existing single-phase ground fault mitigation device (SPGFMD) is usually equipped with a grounding terminal, but the resistance of the grounding grid may change during the long-term operation of the power system. To analyze the influence of the grounding grid resistance on the effectiveness of ground fault current mitigation, the relationship between the grounding grid resistance and the residual ground fault current is derived. This article conducts simulation and experiment to investigate the impact of various grounding grid resistances on the suppression effect of ground fault current under different ground transition resistance circumstances. The critical grounding grid resistance that affects the single-phase ground fault current mitigation effect has been identified, offering a theoretical foundation for the on-site evaluation of the grounding grid status of SPGFMD. The influence mechanism of grounding grid resistance is verified by the simulation and experiment results. The results indicate that the SPGFMD with current-based method can withstand a certain range of grounding grid resistance variation under the condition of a single-phase ground fault in the distribution networks. However, the effectiveness of ground fault current mitigation deteriorates when the grounding grid resistance exceeds the critical threshold. © 2025 John Wiley & Sons Ltd.
Keyword ：
current-based method current-based method distribution networks distribution networks grounding grid resistance grounding grid resistance single-phase ground fault current mitigation single-phase ground fault current mitigation
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| GB/T 7714 | Guo, M. , Weng, M. , Zheng, Z. et al. Single-Phase Ground Fault Current Mitigation in Distribution Network Considering the Influence of Grounding Grid Resistance [J]. | International Journal of Circuit Theory and Applications , 2025 . |
| MLA | Guo, M. et al. "Single-Phase Ground Fault Current Mitigation in Distribution Network Considering the Influence of Grounding Grid Resistance" . | International Journal of Circuit Theory and Applications (2025) . |
| APA | Guo, M. , Weng, M. , Zheng, Z. , Lin, S. . Single-Phase Ground Fault Current Mitigation in Distribution Network Considering the Influence of Grounding Grid Resistance . | International Journal of Circuit Theory and Applications , 2025 . |
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Abstract ：
针对现有配电网弧光高阻接地故障波形多样、仿真所得波形与工程实际差异较大,导致已有故障识别模型难以泛化等问题,本文首先分析已有的仿真模型伏安特性,然后通过试验获取实测伏安特性,并分析仿真波形与实测波形的差异性,最后对影响波形的故障非线性、随机性、间歇性、热惯性、零休偏移等特性进行总结,提出在考虑无功分量的基础上改进建模方法的建议.
Keyword ：
仿真模型 仿真模型 伏安特性 伏安特性 差异性 差异性 弧光高阻接地故障 弧光高阻接地故障 配电网 配电网
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| GB/T 7714 | 林万里 , 杨耿杰 , 郭谋发 . 配电网弧光高阻接地故障仿真与实测波形差异性分析 [J]. | 电气技术 , 2025 , 26 (6) : 38-44 . |
| MLA | 林万里 et al. "配电网弧光高阻接地故障仿真与实测波形差异性分析" . | 电气技术 26 . 6 (2025) : 38-44 . |
| APA | 林万里 , 杨耿杰 , 郭谋发 . 配电网弧光高阻接地故障仿真与实测波形差异性分析 . | 电气技术 , 2025 , 26 (6) , 38-44 . |
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The traditional phase-segregated arc suppression (AS) methods often neglect the influence of line voltage drop (LVD), resulting in the problem of large residual current when single-line-to-ground (SLG) faults occur at the end of heavily loaded lines, making reliable AS difficult. To effectively suppress fault currents during medium and low impedance SLG faults at the end of heavily loaded lines, the phase-segregated AS method considering LVD is proposed in this paper. Additionally, the phase-segregated AS method, which is based on sliding mode control using an exponential convergence rate, is utilized to reduce the total harmonics distortion of fault current and neutral point voltage after current injection. The simulation results validate the effectiveness of the proposed method under the case of the medium or low impedance ground fault occurring at the end of heavily loaded lines.
Keyword ：
distribution network arc suppression distribution network arc suppression line voltage drop line voltage drop phase segregated phase segregated sliding mode control sliding mode control
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| GB/T 7714 | Zheng, Ze-Yin , Qiu, Hao-Yu , Guo, Mou-Fa et al. Phase-Segregated Injection Method for Arc Suppression With Cascaded H-Bridge Inverters Considering Line Voltage Drop [J]. | INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS , 2025 . |
| MLA | Zheng, Ze-Yin et al. "Phase-Segregated Injection Method for Arc Suppression With Cascaded H-Bridge Inverters Considering Line Voltage Drop" . | INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS (2025) . |
| APA | Zheng, Ze-Yin , Qiu, Hao-Yu , Guo, Mou-Fa , Lin, Shu-yue , Zeng, Xiang-jun . Phase-Segregated Injection Method for Arc Suppression With Cascaded H-Bridge Inverters Considering Line Voltage Drop . | INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS , 2025 . |
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Current single-ended fault location methods for single-phase ground faults in distribution networks are facing challenges such as difficulty in identifying reflected wavefronts, inaccurate judgment of wavefront reflection positions, and limited noise immunity, which reduce their feasibility for engineering applications. This article proposes an efficient single-ended traveling wave location scheme aimed at enhancing the accuracy and reliability of fault location. First, the improved Pettitt test is employed to accurately determine the arrival time of the fault wavefront, which avoids errors in judgment of the fault occurrence moment. Subsequently, the Pearson correlation coefficient is utilized to identify the initial wavefront and the wavefronts reflected from the fault point, reducing interference caused by other reflected wavefronts. To accurately calibrate the wavefront arrival time, the Hough transform is introduced to determine the wavefront position. In addition, this article discusses optimizing the arrangement of traveling wave location devices in the distribution network to improve location accuracy and reduce costs. Compared to existing methods, the proposed scheme directly analyzes the original waveform, achieving more accurate wavefront identification and better noise immunity. The effectiveness of the method is validated through software simulations and physical experiments, demonstrating that the fault location error can be controlled within 5%, even under arc ground faults or noise interference.
Keyword ：
Accuracy Accuracy Attenuation Attenuation Distribution network Distribution network Distribution networks Distribution networks Fault location Fault location Hough transform Hough transform Impedance Impedance Interference Interference Noise Noise Recording Recording single-ended traveling wave fault location single-ended traveling wave fault location single-phase ground fault single-phase ground fault Transforms Transforms Transient analysis Transient analysis wavefront calibration wavefront calibration
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| GB/T 7714 | Chen, Fang-Xu , Guo, Mou-Fa , Lin, Jiahao et al. Single-Ended Traveling Wave Location for Single-Phase Ground Faults in Distribution Networks Based on Hough Transform [J]. | IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT , 2025 , 74 . |
| MLA | Chen, Fang-Xu et al. "Single-Ended Traveling Wave Location for Single-Phase Ground Faults in Distribution Networks Based on Hough Transform" . | IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 74 (2025) . |
| APA | Chen, Fang-Xu , Guo, Mou-Fa , Lin, Jiahao , Zheng, Yu-Lin , Zeng, Xian-Kai , Hong, Qiteng . Single-Ended Traveling Wave Location for Single-Phase Ground Faults in Distribution Networks Based on Hough Transform . | IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT , 2025 , 74 . |
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Identifying fault sections in single-phase ground (SPG) faults is essential for electric utilities to promptly isolate faults and restore service. A deep learning-based approach leveraging feature fusion has been proposed for SPG fault section location, utilizing transient zero-sequence currents (TZSCs) captured by feeder terminal units (FTUs). Initially, a convolutional neural network (ConvNet) is pre-trained on TZSC waveforms to distinguish data from the upstream and downstream of the fault point, acting as a feature extractor. This pre-training enables the model to capture distinct transient characteristics from both ends of the fault. The pre-trained ConvNet is then replicated to form a dual-branch architecture, where TZSC data from both ends of the feeder section are input into the respective branches. The features extracted from these branches are concatenated at a fusion layer, allowing the model to effectively integrate the transient information from upstream and downstream, leading to more precise fault section location. Compared with existing methods, our approach demonstrates robustness under various conditions, including simulation verification and field verification. Extensive testing shows that the model maintains high performance even with limited field data, and fine-tuning further enhances its practical applicability for engineering. Moreover, an industrial prototype utilizing Raspberry Pi 4B has been implemented in real-world distribution networks, where fault data are transmitted to the main station, further optimizing the fault section location process using our proposed approach.
Keyword ：
Fault section location Fault section location Feature fusion Feature fusion One-dimension convolutional neural network One-dimension convolutional neural network Resonant distribution networks Resonant distribution networks
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| GB/T 7714 | Gao, Jian-Hong , Guo, Mou-Fa , Lin, Shuyue et al. Deep learning approach for single-phase ground fault section location via feature fusion in resonant distribution networks [J]. | EXPERT SYSTEMS WITH APPLICATIONS , 2025 , 268 . |
| MLA | Gao, Jian-Hong et al. "Deep learning approach for single-phase ground fault section location via feature fusion in resonant distribution networks" . | EXPERT SYSTEMS WITH APPLICATIONS 268 (2025) . |
| APA | Gao, Jian-Hong , Guo, Mou-Fa , Lin, Shuyue , Chen, Duan-Yu , Bai, Hao . Deep learning approach for single-phase ground fault section location via feature fusion in resonant distribution networks . | EXPERT SYSTEMS WITH APPLICATIONS , 2025 , 268 . |
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Since the effectiveness of the flexible current arc suppression method heavily relies on the accurate measurement of the distribution line-to-ground parameters, the suppression of single line-to-ground (SLG) fault current may deteriorate due to factors such as line switching and other disturbances during SLG fault arc suppression. Additionally, during SLG fault arc suppression, promptly identifying the fault type and rapidly deactivating the flexible arc suppression device (FASD) can reduce the overvoltage risk in non-faulted phase devices. To address these issues, this paper presents a parameter identification method based on recursive least squares (RLS) while a variable forgetting factor strategy is introduces to enhance the RLS algorithm's disturbance rejection capability. Simulations verify that the variable forgetting factor recursive least squares (VFF-RLS) algorithm can accurately identify distribution line-to-ground parameters in real time and effectively suppress SLG fault current. The online identification of grounding transition conductance is simultaneously used to determine the fault type and quickly detect when the SLG fault has been cleared.
Keyword ：
Arc discharges Arc discharges Current measurement Current measurement distribution line-to-ground parameters grounding transition conductance distribution line-to-ground parameters grounding transition conductance Distribution networks Distribution networks Fault currents Fault currents Fault diagnosis Fault diagnosis Grounding Grounding Object recognition Object recognition online identification online identification Real-time systems Real-time systems recursive least square method recursive least square method single line-to-ground fault arc suppression single line-to-ground fault arc suppression Voltage control Voltage control Voltage measurement Voltage measurement
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| GB/T 7714 | Zheng, Zeyin , Xu, Jianfeng , Guo, Moufa . Online Identification Method of Distribution Line-to-Ground Parameters and Grounding Transition Conductance During Arc Suppression [J]. | PROTECTION AND CONTROL OF MODERN POWER SYSTEMS , 2025 , 10 (4) : 103-115 . |
| MLA | Zheng, Zeyin et al. "Online Identification Method of Distribution Line-to-Ground Parameters and Grounding Transition Conductance During Arc Suppression" . | PROTECTION AND CONTROL OF MODERN POWER SYSTEMS 10 . 4 (2025) : 103-115 . |
| APA | Zheng, Zeyin , Xu, Jianfeng , Guo, Moufa . Online Identification Method of Distribution Line-to-Ground Parameters and Grounding Transition Conductance During Arc Suppression . | PROTECTION AND CONTROL OF MODERN POWER SYSTEMS , 2025 , 10 (4) , 103-115 . |
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In order to address the challenges posed by weak and variable high-impedance fault signals and limited data availability in practical distribution networks, a novel method for detecting high-impedance faults is proposed. Initially, a multi-head variational autoencoder model based on squeeze-excitation networks is employed to augment the small sample dataset. Subsequently, the data are filtered, and the temporal and frequency domain features are extracted, respectively. Considering the weak characteristics of high impedance fault features and the limitations of the proliferation model in generating comprehensive and effective fault features, a categorical boosting algorithm based on the gradient harmonized mechanism (GHM-CatBoost) is introduced. The GHM-CatBoost algorithm incorporates a gradient harmonized mechanism loss function to address the imbalance in attention between easily distinguishable and challenging samples, thereby mitigating the issue of overfitting. The research findings suggest that the data proliferation model can produce fault samples with a blend of simulation data diversity and measured data randomness, thereby enhancing the richness of the dataset. Furthermore, the fault recognition accuracy achieved by the proposed GHM-CatBoost model is notably high at 97.21%, outperforming its counterpart classifier model. Moreover, the efficacy of the proposed approach is validated through rigorous testing and comparative analysis. © 2025 Science Press. All rights reserved.
Keyword ：
Adaptive boosting Adaptive boosting Fault detection Fault detection Frequency domain analysis Frequency domain analysis Image segmentation Image segmentation Network coding Network coding Variational techniques Variational techniques
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| GB/T 7714 | Gao, Wei , He, Wenxiu , Guo, Moufa et al. Detection Method of High-impedance Fault in Distribution Network Based on Uneven Small Samples from Actual Measurements [J]. | High Voltage Engineering , 2025 , 51 (3) : 1135-1144 . |
| MLA | Gao, Wei et al. "Detection Method of High-impedance Fault in Distribution Network Based on Uneven Small Samples from Actual Measurements" . | High Voltage Engineering 51 . 3 (2025) : 1135-1144 . |
| APA | Gao, Wei , He, Wenxiu , Guo, Moufa , Bai, Hao . Detection Method of High-impedance Fault in Distribution Network Based on Uneven Small Samples from Actual Measurements . | High Voltage Engineering , 2025 , 51 (3) , 1135-1144 . |
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High impedance faults (HIFs) are difficult to detect because of low amplitude of the current signal. The interference from switching cases also jeopardizes the reliability of HIF detection (HIFD). Moreover, a long detection time is more likely to cause accidents. To diagnose HIFs promptly and precisely, a time-adaptive (TA) HIFD model is proposed. Firstly, the zero-sequence current data of the faulty feeder are processed into a variable length training set to train gated recurrent unit (GRU) networks. Secondly, a cost-sensitive method employed to train two biased GRU models with contrary preference. Then the two models are combined into high reliability evaluation model. The predicted reliability depends on the consistency of predicted results of the two models. Reliable results are output, while the unreliable results are set aside. To prevent untimely detection, an equal GRU-based model is activated when reaching the time threshold. Delayed judgment improves accuracy of HIFD and reduces probability of harm caused by untimely detection. The performance of proposed method validated by simulated data, and tested in a realistic 10 kV distribution network experimental system. In the true type 10kV system, the TA HIFD model can achieve an accuracy of 96.73% with average detection time of 4.315ms.
Keyword ：
cost-sensitive cost-sensitive fault detection fault detection gated recurrent unit (GRU) gated recurrent unit (GRU) high impedance fault (HIF) high impedance fault (HIF) time-adaptive (TA) time-adaptive (TA) variable mode decomposition (VMD) variable mode decomposition (VMD)
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| GB/T 7714 | Lin, Jianxin , Lin, Xiwen , Wang, Huaiyuan et al. Time-adaptive High Impedance Fault Detection Model Based on Cost-sensitive Method [J]. | ELECTRIC POWER SYSTEMS RESEARCH , 2025 , 247 . |
| MLA | Lin, Jianxin et al. "Time-adaptive High Impedance Fault Detection Model Based on Cost-sensitive Method" . | ELECTRIC POWER SYSTEMS RESEARCH 247 (2025) . |
| APA | Lin, Jianxin , Lin, Xiwen , Wang, Huaiyuan , Guo, Moufa . Time-adaptive High Impedance Fault Detection Model Based on Cost-sensitive Method . | ELECTRIC POWER SYSTEMS RESEARCH , 2025 , 247 . |
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Distribution system structures are intricate and variable, with single-phase ground (SPG) fault occurring frequently. Existing section location methods for SPG faults are often influenced by manually set thresholds, resulting in low accuracy. This article analyzes the relationship between the zero-sequence voltage (ZSV) and zero-sequence current (ZSC) synthesized from three-phase voltage and current under the condition of no zero-sequence transformer installed on the line and proposes an SPG fault section threshold-free location method based on Swin-Transformer (S-T). First, Fourier transform-based data processing methods correct phase errors caused by current transformers (CTs) and eliminate the dc bias in synthesized ZSCs. Second, the synthesized ZSC waveform and the derivative of ZSC (DZSV) waveform are overlaid on the same image, with the enclosed areas shaded to highlight the relationship between the two electrical quantities. Finally, the transformer model is used to classify the differentiated images between the SPG fault section and sound section to achieve threshold-free fault location. The proposed method has been tested and validated on an industrial prototype in a 10-kV full-scale test system and deployed in the actual distribution network. Experimental results demonstrate that the method can accurately locate fault sections even under conditions of noise interference and inaccurate trigger timing.
Keyword ：
Adaptation models Adaptation models Capacitance Capacitance Classification algorithms Classification algorithms Current transformers Current transformers Data mining Data mining Distribution network Distribution network Distribution networks Distribution networks fault section location fault section location Feature extraction Feature extraction Grounding Grounding single-phase ground (SPG) fault single-phase ground (SPG) fault synthesized zero sequence synthesized zero sequence Threshold voltage Threshold voltage transformer transformer Transient analysis Transient analysis
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| GB/T 7714 | Guo, Mou-Fa , Lin, Hongxin , Lin, Jiahao et al. Synthetic Zero-Sequence Signal-Based Intelligent Location Method for Single-Phase Ground Fault in Distribution Networks [J]. | IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT , 2025 , 74 . |
| MLA | Guo, Mou-Fa et al. "Synthetic Zero-Sequence Signal-Based Intelligent Location Method for Single-Phase Ground Fault in Distribution Networks" . | IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 74 (2025) . |
| APA | Guo, Mou-Fa , Lin, Hongxin , Lin, Jiahao , Hong, Qiteng . Synthetic Zero-Sequence Signal-Based Intelligent Location Method for Single-Phase Ground Fault in Distribution Networks . | IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT , 2025 , 74 . |
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Single-line ground (SLG) faults in distribution networks may cause hazards such as fire, electric shock, and overvoltage. Active power electronic converters (PECs) can suppress the fault current and fault voltage. However, the application is limited due to the low suppression rate and high cost of additional power electronic equipment. This article proposes to employ distributed power electronics of active distribution networks to cooperatively eliminate fault. In this method, PECs are modeled as virtual zero-sequence synchronous generators (VZSGs), and the line-to-ground impedances (LGIs) are modeled as zero-sequence loads. A theory of distributed VZSGs supplying zero-sequence loads, which can realize fault current and voltage suppression, is proposed. The required supply current can be adaptively allocated between these VZSGs based on their reserve capacity ratio, and their supply current can be dynamically corrected based on the droop coefficients of VZSGs when the LGI changes. The fault current and voltage suppression rate is improved because the adaptive calculation of the VZSGs reference value combines the voltage- and current-based suppression methods. Simulation study and experimental validation results demonstrate that not only is the proposed method cost-effective, but it also efficiently improves the fault current and voltage suppression rate for various fault conditions.
Keyword ：
Active distribution networks Active distribution networks Arc discharges Arc discharges Circuit faults Circuit faults cooperative fault arc suppression cooperative fault arc suppression distributed power electronic converters (PECs) distributed power electronic converters (PECs) Distribution networks Distribution networks Electrical engineering Electrical engineering Fault currents Fault currents flexible fault elimination flexible fault elimination Impedance Impedance Power electronics Power electronics Resistance Resistance single-line ground (SLG) fault single-line ground (SLG) fault virtual zero-sequence synchronous generators (VZSGs) virtual zero-sequence synchronous generators (VZSGs) Voltage control Voltage control
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| GB/T 7714 | Zhang, Bin-Long , Guo, Mou-Fa , Lak, Mohammadreza et al. Theory and Method of Distributed Virtual Zero-Sequence Synchronous Generators for Cooperative Fault Arc Suppression in Active Distribution Networks [J]. | IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS , 2025 . |
| MLA | Zhang, Bin-Long et al. "Theory and Method of Distributed Virtual Zero-Sequence Synchronous Generators for Cooperative Fault Arc Suppression in Active Distribution Networks" . | IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS (2025) . |
| APA | Zhang, Bin-Long , Guo, Mou-Fa , Lak, Mohammadreza , Lin, Chih-Min , Hong, Qiteng . Theory and Method of Distributed Virtual Zero-Sequence Synchronous Generators for Cooperative Fault Arc Suppression in Active Distribution Networks . | IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS , 2025 . |
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