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学者姓名：郑泽胤
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Abstract ：
To address the existing issue of electric shock incidents that cannot be accurately identified by current leakage protection devices, this paper presents a novel electric shock accident recognition method. Firstly, the method of singular spectrum analysis (SSA) is employed to extract the main components of leakage recording data. Subsequently, 20 temporal domain features of the leakage current waveform are extracted. Then, an ensemble learning model based on extreme gradient boosting (XGBoost), categorical boosting (CatBoost) and random forest (RF), is established to select optimal features that best represent the sample characteristics from the feature set. Finally, support vector machine (SVM) is used to classify the extracted dataset. Experimental results demonstrate that this method can rapidly differentiate between electric shock faults and common leakage faults, achieving an accuracy rate as high as 99%, indicating its feasibility. © 2024 IEEE.
Keyword ：
electric shock faults identification electric shock faults identification feature selection feature selection leakage protection device leakage protection device singular spectrum analysis (SSA) singular spectrum analysis (SSA)
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| GB/T 7714 | Chen, Y.-L. , Gao, W. , Rao, J.-M. et al. Electric Shock Accident Detection Method Based on Ensemble Decision Trees Boosting for Feature Selection [未知]. |
| MLA | Chen, Y.-L. et al. "Electric Shock Accident Detection Method Based on Ensemble Decision Trees Boosting for Feature Selection" [未知]. |
| APA | Chen, Y.-L. , Gao, W. , Rao, J.-M. , Guo, M.-F. , Zheng, Z.-Y. . Electric Shock Accident Detection Method Based on Ensemble Decision Trees Boosting for Feature Selection [未知]. |
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为解决传统三相直挂式柔性消弧装置非故障相桥臂承担线电压的问题,提出一种故障相桥臂转移接地的消弧方法.该方法通过开关控制故障相桥臂转移接地,母线电压由故障相桥臂与非故障相桥臂共同承担,三相桥臂共同输出电流,以实现消弧.针对级联H桥直流侧需独立供电的问题,提出分布式电压平衡换流调制方法.该调制方法根据H桥输出状态和电流方向对直流侧电容充放电的影响,有选择地改变H桥的输出状态,进而实现直流侧电压的稳定.使用该调制方法的消弧装置无须在直流侧配备独立供电电源,在消弧过程中能保持H桥直流侧电压稳定.最后,采用Matlab/Simulink仿真软件对所提方法进行验证,仿真结果证明了所提方法的有效性.
Keyword ：
单相接地故障 单相接地故障 消弧 消弧 直流侧电压 直流侧电压 级联H桥变流器 级联H桥变流器 转移接地 转移接地
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| GB/T 7714 | 郭谋发 , 刘鑫斌 , 张彬隆 et al. 故障相桥臂转移接地消弧装置直流侧电压控制方法 [J]. | 电力系统保护与控制 , 2024 , 52 (19) : 1-14 . |
| MLA | 郭谋发 et al. "故障相桥臂转移接地消弧装置直流侧电压控制方法" . | 电力系统保护与控制 52 . 19 (2024) : 1-14 . |
| APA | 郭谋发 , 刘鑫斌 , 张彬隆 , 赵国军 , 郑泽胤 . 故障相桥臂转移接地消弧装置直流侧电压控制方法 . | 电力系统保护与控制 , 2024 , 52 (19) , 1-14 . |
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Two cascaded H-bridge converters (CHBC) are proposed to regulate the zero-sequence reactive current of distribution networks flexibly to realize the online ice-melting of ice-covered lines without power outages. The two CHBCs are connected in series to the grounding transformer at the head and end of the ice-covered lines. The zero-sequence voltage of the distribution networks is regulated by the end CHBC within the permissible range of insulation, and the resulting zero-sequence capacitive current to ground flows through the three-phase ice-covered conductors as ice-melting current, which realizes a better effect than the single-phase short-circuit current ice-melting. By regulating the capacitance current to the ground of the distribution networks through the head CHBC, the size of the ice-melting current can be adjusted arbitrarily. The proposed method does not require a single-phase grounding short circuit and can simultaneously accurately regulate the ice-melting current to melt ice in three-phase lines. CHBCs only have reactive interaction with the distribution networks, saving the capacity of DC sources, and the sum of power interactions is zero, which does not affect the normal supply voltage of the distribution networks, and there is no need for power outages for the entire network loads. The simulation and experimental results verify the feasibility and effectiveness of the proposed method and control scheme. © 2024 Power System Technology Press. All rights reserved.
Keyword ：
Bridge circuits Bridge circuits Capacitance Capacitance Electric grounding Electric grounding Electric loads Electric loads Ice Ice Outages Outages Power converters Power converters Reactive power Reactive power
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| GB/T 7714 | Zhang, Binlong , Zheng, Zeyin , Guo, Moufa . Online Ice-melting Method Based on Flexible Regulation of Zero-sequence Reactive Current for Ice-covered Lines in Distribution Networks Without Power Outages [J]. | Power System Technology , 2024 , 48 (2) : 913-922 . |
| MLA | Zhang, Binlong et al. "Online Ice-melting Method Based on Flexible Regulation of Zero-sequence Reactive Current for Ice-covered Lines in Distribution Networks Without Power Outages" . | Power System Technology 48 . 2 (2024) : 913-922 . |
| APA | Zhang, Binlong , Zheng, Zeyin , Guo, Moufa . Online Ice-melting Method Based on Flexible Regulation of Zero-sequence Reactive Current for Ice-covered Lines in Distribution Networks Without Power Outages . | Power System Technology , 2024 , 48 (2) , 913-922 . |
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Abstract ：
提出采用两台级联H桥变流器(cascadedH-bridge converter,CHBC)柔性调控配电网零序无功电流，实现覆冰线路不停电在线融冰。两台CHBC分别串接在覆冰线路首端和末端的接地变压器。通过末端CHBC在绝缘允许范围内调控配电网零序电压，产生的零序对地电容电流作为融冰电流流过三相覆冰导线，实现较单相接地短路电流融冰更佳的效果。通过首端CHBC调控配电网对地电容电流，实现融冰电流大小的任意调节。所提方法无需做单相接地短路，能够精准调控融冰电流，实现三相线路同时融冰。CHBC与配电网仅存在无功交互，节省了直流稳压电源容量，且功率交互之和为零，不影响配电网正常供电电压，全网负荷无需停电。仿真和实验结果验证了所提方法及控制方案的可行性和有效性。
Keyword ：
三相覆冰线路 三相覆冰线路 不停电在线融冰 不停电在线融冰 柔性调控 柔性调控 级联H桥变流器 级联H桥变流器 配电网 配电网 零序无功电流 零序无功电流
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| GB/T 7714 | 张彬隆 , 郑泽胤 , 郭谋发 . 基于零序无功电流柔性调控的配电网覆冰线路不停电在线融冰方法 [J]. | 电网技术 , 2024 , 48 (02) : 913-928 . |
| MLA | 张彬隆 et al. "基于零序无功电流柔性调控的配电网覆冰线路不停电在线融冰方法" . | 电网技术 48 . 02 (2024) : 913-928 . |
| APA | 张彬隆 , 郑泽胤 , 郭谋发 . 基于零序无功电流柔性调控的配电网覆冰线路不停电在线融冰方法 . | 电网技术 , 2024 , 48 (02) , 913-928 . |
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Aiming at the problem that the existing single-phase-to-ground fault flexible compensation device has low compensation accuracy, long response time, and needs DC side power supply, a flexible compensation device based on double-loop passivity-based control is proposed. Firstly, the topology and working principle of the device are analyzed. And a compensation current distribution method of the bridge arm is proposed. Secondly, a double-loop passivity-based controller is designed. Finally, the proposed method is verified by MATLAB/Simulink software and 10 kV physical simulation system of distribution network. The comparisons between doubleloop passivity-based control, passivity-based control, and proportional integration control is discussed. The result shows that the proposed method can accurately and rapidly compensate the fault current.
Keyword ：
Distribution networks Distribution networks Double -loop passivity -based control Double -loop passivity -based control Flexible compensation Flexible compensation Single -phase -to -ground fault Single -phase -to -ground fault T -type topology T -type topology
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| GB/T 7714 | Guo, Mou-fa , Liu, Xin-bin , You, Jian-zhang et al. A flexible compensation device for single-phase-to-ground fault in distribution networks based on double-loop passivity-based control [J]. | INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS , 2024 , 157 . |
| MLA | Guo, Mou-fa et al. "A flexible compensation device for single-phase-to-ground fault in distribution networks based on double-loop passivity-based control" . | INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS 157 (2024) . |
| APA | Guo, Mou-fa , Liu, Xin-bin , You, Jian-zhang , Zheng, Ze-yin , Wang, Zhi-ying . A flexible compensation device for single-phase-to-ground fault in distribution networks based on double-loop passivity-based control . | INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS , 2024 , 157 . |
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The complicated operating conditions of distribution networks may be prone to single-phase grounding (SPG) fault. Based on statistics, SPG faults account for more than 80% of all fault types in the distribution networks. Arc suppression coil can typically compensate for most of the capacitive fault current but cannot eliminate the fault voltage, and the residual fault current, including the active current, is still high. To limit fault current completely and eliminate voltage simultaneously, a cascaded grid-connected converter (CGCC) coupled with an arc suppression coil is presented in this paper. However, with the increase of nonlinear loads, the transmission lines contain a large amount of harmonic current. Thus, the CGCC is proposed to compensate the harmonic current simultaneously by controlling its d-axis and q-axis output components, and to control the 0-axis output component for arc suppression, and the controls of harmonic compensation and arc suppression are decoupled, so that the utilization and cost-effectiveness are improved. © 2024 IEEE.
Keyword ：
Arc suppression coil Arc suppression coil flexible arc suppression flexible arc suppression harmonic compensation harmonic compensation single-phase ground fault single-phase ground fault
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| GB/T 7714 | Ke, Q.-X. , Zhang, B.-L. , Zheng, Z.-Y. et al. Cascaded Grid-Connected Converter Coupled with Peterson Coil for Harmonic Compensation and Arc Suppression in Distribution Networks [未知]. |
| MLA | Ke, Q.-X. et al. "Cascaded Grid-Connected Converter Coupled with Peterson Coil for Harmonic Compensation and Arc Suppression in Distribution Networks" [未知]. |
| APA | Ke, Q.-X. , Zhang, B.-L. , Zheng, Z.-Y. , Guo, M.-F. . Cascaded Grid-Connected Converter Coupled with Peterson Coil for Harmonic Compensation and Arc Suppression in Distribution Networks [未知]. |
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There is a problem in that the non-fault phase bridge arm of traditional three-phase direct-hanging flexible arc suppression device bears the line voltage. Thus a fault phase bridge arm transfer grounding arc suppression method is proposed. This method controls the fault phase bridge arm transfer grounding through the switch. The bus voltage is shared by the fault phase bridge arm and the non-fault phase bridge arm, and the three-phase bridge arm outputs the current to achieve arc suppression. The cascaded H-bridge DC-link needs an independent power supply, so a distributed voltage balance commutation modulation method is proposed. The modulation method selectively changes the H-bridge output state according to the influence of H-bridge output state and current direction on the charge and discharge of the DC-link capacitor, and then realizes the stability of DC-link voltage. The arc suppression device using this modulation method does not need to be equipped with an independent power supply on the DC side, and can maintain H-bridge DC-link voltage stability during the arc suppression process. Finally, the proposed method is verified by Matlab/Simulink simulation software, and the results prove the effectiveness of the proposed method. © 2024 Power System Protection and Control Press. All rights reserved.
Keyword ：
Electric grounding Electric grounding Electric power system protection Electric power system protection HVDC power transmission HVDC power transmission MATLAB MATLAB Solar power generation Solar power generation
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| GB/T 7714 | Guo, Moufa , Liu, Xinbin , Zhang, Binlong et al. DC-link voltage control method of a fault phase bridge arm transfer grounding arc suppression device [J]. | Power System Protection and Control , 2024 , 52 (19) : 1-14 . |
| MLA | Guo, Moufa et al. "DC-link voltage control method of a fault phase bridge arm transfer grounding arc suppression device" . | Power System Protection and Control 52 . 19 (2024) : 1-14 . |
| APA | Guo, Moufa , Liu, Xinbin , Zhang, Binlong , Zhao, Guojun , Zheng, Zeyin . DC-link voltage control method of a fault phase bridge arm transfer grounding arc suppression device . | Power System Protection and Control , 2024 , 52 (19) , 1-14 . |
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Most of the phase-to-ground parameters induced between distribution lines and ground are asymmetric, which can result in the generation of unbalanced voltage, shifting the neutral point voltage. For compensated distribution networks, the existence of an arc suppression coil can increase the influence of asymmetric parameters and exacerbate the deviation of neutral point voltage. Maintaining the balance of three-phase voltage is a prerequisite not only for the stable operation of the distribution networks but also for improving the reliability of single-phase ground fault detection. This article proposes a novel online split-phase identification of asymmetric parameters between distribution lines and ground for unbalanced voltage compensation based on power electronics. First, an adaptive active current-type compensation method based on power electronics is proposed; it can adapt to compensate for three-phase unbalanced voltage with different neutral point grounding styles. Second, particle swarm optimization is used to realize the online split-phase identification of the phase-to-ground parameters of the distribution power lines. The identified parameters are used to calculate the reference value of the compensation current and the asymmetry of each phase-to-ground parameter. Finally, the feasibility and effectiveness of the proposed method are verified by simulation and experiment.
Keyword ：
Asymmetric parameters Asymmetric parameters distribution networks distribution networks online parameter split-phase identification online parameter split-phase identification particle swarm optimization (PSO) particle swarm optimization (PSO) power electronics power electronics unbalanced voltage compensation unbalanced voltage compensation
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| GB/T 7714 | Guo, Moufa , Jiao, Yaohui , Zheng, Zeyin et al. Online Split-Phase Identification of Asymmetric Parameters Between Distribution Lines and Ground for Unbalanced Voltage Compensation Based on Power Electronics [J]. | IEEE TRANSACTIONS ON POWER ELECTRONICS , 2024 , 39 (8) : 10067-10078 . |
| MLA | Guo, Moufa et al. "Online Split-Phase Identification of Asymmetric Parameters Between Distribution Lines and Ground for Unbalanced Voltage Compensation Based on Power Electronics" . | IEEE TRANSACTIONS ON POWER ELECTRONICS 39 . 8 (2024) : 10067-10078 . |
| APA | Guo, Moufa , Jiao, Yaohui , Zheng, Zeyin , Zhang, Binlong , Lin, Jiahao , Hong, Qiteng . Online Split-Phase Identification of Asymmetric Parameters Between Distribution Lines and Ground for Unbalanced Voltage Compensation Based on Power Electronics . | IEEE TRANSACTIONS ON POWER ELECTRONICS , 2024 , 39 (8) , 10067-10078 . |
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Three-phase AC distribution networks are required to operate as symmetrically as possible for optimal performance, but the three-phase-to-ground parameters are asymmetric in the field due to network construction deviation, resulting in the three-phase voltage unbalance and the neutral point displacement overvoltage. The neutral point displacement overvoltage would endanger the distribution networks and even damage critical power equipment. Therefore, the flexible asymmetry suppression device (FASD) with the topology of a cascaded H-bridge (CHB) inverter and the backstepping control (BSC) method is proposed for limiting the neutral point displacement overvoltage in this paper. The FASD outputs the current to the grid for compensating the unbalanced distribution networks caused by the asymmetry of three-phase-to-ground parameters and realizing the suppression of the neutral point displacement overvoltage. A current-based BSC method is designed to improve the stability and reliability of the CHB inverter, and the effectiveness of neutral point displacement overvoltage suppression based on the BSC method is verified by experimental results, and the advantage of the proposed method is shown by comparing with proportional-integral control (PIC) method, sliding mode control (SMC), and proportional resonant control (PRC) methods.
Keyword ：
Backstepping control Backstepping control Current injection Current injection Distribution networks Distribution networks Neutral point displacement overvoltage Neutral point displacement overvoltage suppression suppression Three -phase -to -ground parameters asymmetry Three -phase -to -ground parameters asymmetry
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| GB/T 7714 | Zheng, Ze-Yin , Xu, Jian-Feng , Zhang, Bin -Long et al. Flexible neutral point displacement overvoltage suppression method based on backstepping control in unbalanced distribution networks [J]. | INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS , 2023 , 148 . |
| MLA | Zheng, Ze-Yin et al. "Flexible neutral point displacement overvoltage suppression method based on backstepping control in unbalanced distribution networks" . | INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS 148 (2023) . |
| APA | Zheng, Ze-Yin , Xu, Jian-Feng , Zhang, Bin -Long , Wang, Hui , Guo, Mou-Fa , Lin, Shuyue . Flexible neutral point displacement overvoltage suppression method based on backstepping control in unbalanced distribution networks . | INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS , 2023 , 148 . |
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A current-voltage composite controller for an arc suppression inverter is designed. The current and voltage at the fault point are reduced by injecting current and regulating the neutral point voltage to completely eliminate the risk of fire and overvoltage caused by a single-line-to-ground fault arc. A cascaded inverter is used, and the effects of the ground parameter measurement, line impedance voltage drop, harmonic current and arc suppression coil on the current control, voltage control and composite control methods are analysed and compared. Finally, software simulations and industrial prototype experiments show that the proposed composite control method is effective and less affected by ground parameter measurement and line impedance voltage drop and has better adaptability.
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| GB/T 7714 | You, Jianzhang , Guo, Moufa , Zheng, Zeyin et al. Flexible composite suppression method for ground arc in resonant grounding system [J]. | HIGH VOLTAGE , 2023 , 8 (6) : 1296-1305 . |
| MLA | You, Jianzhang et al. "Flexible composite suppression method for ground arc in resonant grounding system" . | HIGH VOLTAGE 8 . 6 (2023) : 1296-1305 . |
| APA | You, Jianzhang , Guo, Moufa , Zheng, Zeyin , Liu, Xinbin . Flexible composite suppression method for ground arc in resonant grounding system . | HIGH VOLTAGE , 2023 , 8 (6) , 1296-1305 . |
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