High Voltage最新文献

{"title":"Cumulative degradation of electrical properties in polypropylene insulation for AC cables under repeated impulse voltage stress","authors":"Yunpeng Zhan,&nbsp;Shuai Hou,&nbsp;Mingli Fu,&nbsp;Lingmeng Fan,&nbsp;Binjie Zhang,&nbsp;Kai Yu,&nbsp;Xiaolei Zhao,&nbsp;Yi Yin","doi":"10.1049/hve2.70050","DOIUrl":"10.1049/hve2.70050","url":null,"abstract":"<p>In modern power transmission systems, AC cables are increasingly integrated with overhead lines, forming hybrid networks. These cables are frequently exposed to repeated impulse voltages from the overhead lines. While surge arresters offer partial protection, the long-term effects of these impulses on polypropylene (PP) insulation remain unclear. This study systematically investigates the cumulative degradation of the electrical breakdown properties of PP insulation under repeated impulse voltage stress. The 50% impulse breakdown voltage (<i>U</i>₅₀) was first determined, and a series of impulse tests were conducted at varying voltage levels to assess the number of impulses required for electrical breakdown, leading to the construction of an amplitude of impulse voltage (<i>U</i>) and the number of times required for breakdown (<i>N</i>), which is <i>U</i>–<i>N</i> curve. To evaluate the cumulative degradation, impulse voltage at 0.8 <i>U</i>₅₀ was applied for 50, 100, and 200 cycles, with the electrical conductivity current measured before and after each series of impulses. The results indicate significant degradation in the insulating properties of PP under repeated impulse stress. Mechanisms of cumulative degradation under impulse stress were further explored using isothermal relaxation current and space charge measurements. These findings provide critical insights into the performance of PP in hybrid transmission systems and offer valuable data to inform improved insulation design and protection strategies.</p>","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"10 3","pages":"623-631"},"PeriodicalIF":4.4,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70050","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144319637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design of cooling structure improvement of hybrid commutated converter valve","authors":"Xu He,&nbsp;Lu Qu,&nbsp;Xiaoguang Wei,&nbsp;Fang Cai,&nbsp;Zhanqing Yu,&nbsp;Tianhui Yang,&nbsp;Yurong Luo,&nbsp;Gongyi Zhang","doi":"10.1049/hve2.70060","DOIUrl":"https://doi.org/10.1049/hve2.70060","url":null,"abstract":"<p>This paper presents a thermal management framework for 120 kV hybrid commutated converter (HCC) valves, addressing critical cooling challenges in multi-hundred-MW power conversion systems. Power loss calculations under rated (1.0 p.u.) and overload (1.2 p.u.) conditions demonstrate that HCC valves achieve comparable loss levels to line commutated converter counterparts while enabling active turn-off control. Comparative analysis of radiator configurations identifies 2-parallel branch connections as optimal. Integrated thermal-fluid models combining 3D finite element analysis and computational fluid dynamics reveal significant temperature gradients and flow maldistribution in baseline designs. On this basis, this paper modifies the flow from equal flow resistance allocation to heat-based allocation and it reduces maximum integrated gate-commutated thyristor temperature rise by 7.3% at 1.2 p.u. with minimal pressure drop variation. Experimental validation confirms the proposed cooling strategy enhances valve safety margins through improved heat dissipation balance, providing a validated theoretical foundation for high-power converter thermal design.</p>","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"10 3","pages":"570-580"},"PeriodicalIF":4.4,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70060","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144520048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Control strategy of novel hybrid commutated converter based on reverse blocking integrated gate commutated thyristor for commutation failure mitigation","authors":"Zongze Wang,&nbsp;Zhanqing Yu,&nbsp;Lu Qu,&nbsp;Zhichang Yuan,&nbsp;Kangsheng Cui,&nbsp;Jian Shi,&nbsp;Biao Zhao,&nbsp;Rong Zeng","doi":"10.1049/hve2.70047","DOIUrl":"10.1049/hve2.70047","url":null,"abstract":"<p>Commutation failure (CF) is an inherent problem faced by line commutated converter high voltage direct current (LCC-HVDC) technology. To completely solve the problem of CF, we have proposed a novel hybrid commutated converter (HCC) technology based on reverse blocking integrated gate commutated thyristor, which can utilise two methods for commutation: enhanced grid voltage commutation and active turn-off forced commutation. In this paper, the topology and operating principle of HCC are proposed. Then, the control and protection strategy is designed based on the current variation trend under AC faults. To verify the effectiveness of HCC in mitigating CF, a 120-kV/360-MW HCC-HVDC model is built in PSCAD/EMTDC, adopting LCC at the rectifier side and HCC at the inverter side. Based on this model, HCC steady-state and fault transient stresses are analysed. Various AC faults are simulated and the performance of HCC-HVDC is compared with LCC-HVDC. Finally, the results show that the HCC topology and proposed control strategy can solve CF under all fault conditions with almost the same attributes as LCC, such as large capacity, low cost, low loss and high reliability, which is meaningful for the application of HCC to the HVDC transmission system.</p>","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"10 3","pages":"546-554"},"PeriodicalIF":4.4,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70047","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144329491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Guest Editorial: Equipment technology of power transmission and distribution supporting the new-type power system","authors":"Marcio Szechtman","doi":"10.1049/hve2.70062","DOIUrl":"10.1049/hve2.70062","url":null,"abstract":"&lt;p&gt;The new-type power system, with a strong, intelligent and flexible grid as its hub platform, is a key carrier for achieving the goals of carbon peak and carbon neutrality. Among them, AC/DC transmission and distribution equipment is the core for achieving power conversion and transmission. In order to adapt to the high proportion of new energy, large-scale energy storage, and diversified flexible load, and to promote the high-quality construction of the new-type power system, it is urgent to carry out research and development on flexible and intelligent new transmission and distribution equipment.&lt;/p&gt;&lt;p&gt;This Special Issue aims to foster academic exchanges and advance theoretical research in the areas related to the equipment technology of power transmission and distribution, in conjunction with the outstanding papers selected by the 20th IET International Conference on AC and DC Power Transmission. The call for the Special Issue comprises two sections: materials and devices of AC/DC power transmission and distribution systems, and equipment of AC/DC power transmission and distribution systems.&lt;/p&gt;&lt;p&gt;After undergoing a rigorous review by Guest Editors and journal, followed by a stringent external review process, five exceptional articles are ultimately published in this special issue.&lt;/p&gt;&lt;p&gt;Zhanqing Yu et al. from Tsinghua University propose a novel non-current insulation gate drive technology and develop the first current-source gate drivers for Integrated Gate Commutated Thyristor. The innovation represents an advancement towards chip-level integration, fundamentally enhancing gate-drive reliability, compactness and operational efficiency, thus marking a significant leap towards chip-level evolution of next-generation power electronics systems.&lt;/p&gt;&lt;p&gt;Rong Zeng et al. from Tsinghua University propose a hybrid commutation strategy that includes forced commutation control based on active turn-off and natural commutation control. Under this novel control strategy, the hybrid commutated converter (HCC) can completely eliminate the risk of cascading power outages caused by commutation failures inherent in traditional line-commutated converters, marking a significant milestone in equipment in HVDC transmission and promoting the evolution of DC converter from passive commutation to active commutation.&lt;/p&gt;&lt;p&gt;Sungmin Kim and Donguk Kim from Hanyang University propose a medium-voltage single-phase solid-state transformer (SST) tailored specifically for high-speed railway propulsion systems. Their design effectively interfaces a 25 kV AC supply with a 3 kV DC traction inverter. A novel soft-start control method is also introduced to mitigate transformer inrush currents. Experimental validation, including comprehensive thermal testing, further confirms the operational feasibility and practical reliability of the developed SST module, highlighting its promising application prospects in railway power systems.&lt;/p&gt;&lt;p&gt;Lu Qu et al. from Beijing Huairou Laborato","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"10 3","pages":"531-532"},"PeriodicalIF":4.4,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70062","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144329493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Detection of Transient Decomposition Products of CF3SO2F and C4F7N via OES Under Spark and Glow Discharges","authors":"Chenxi Man, Jincong Wang, Keli Gao, Yiheng Li, Yumin Zhang, Xuekai Pei","doi":"10.1049/hve2.70039","DOIUrl":"https://doi.org/10.1049/hve2.70039","url":null,"abstract":"The optical emission spectra (OES) reflect the presence of excited states in the gaseous discharge, which are directly linked to the decomposition characteristics of insulating gases. In this study, a pin/rod–plate discharge reactor driven by either a high-voltage direct current (DC) generator or a pulsed generator was developed to establish an effective platform for generating decomposition products of &lt;span data-altimg=\"/cms/asset/c37d5c2b-5870-40ea-94e9-a4dfb7870fa0/hve270039-math-0001.png\"&gt;&lt;/span&gt;&lt;mjx-container ctxtmenu_counter=\"329\" ctxtmenu_oldtabindex=\"1\" jax=\"CHTML\" role=\"application\" sre-explorer- style=\"font-size: 103%; position: relative;\" tabindex=\"0\"&gt;&lt;mjx-math aria-hidden=\"true\" location=\"graphic/hve270039-math-0001.png\"&gt;&lt;mjx-semantics&gt;&lt;mjx-mrow data-semantic-annotation=\"clearspeak:unit\" data-semantic-children=\"2,5,6\" data-semantic-content=\"7,8\" data-semantic- data-semantic-role=\"implicit\" data-semantic-speech=\"CF Subscript 3 Baseline SO Subscript 2 Baseline normal upper F\" data-semantic-type=\"infixop\"&gt;&lt;mjx-msub data-semantic-children=\"0,1\" data-semantic- data-semantic-parent=\"9\" data-semantic-role=\"unknown\" data-semantic-type=\"subscript\"&gt;&lt;mjx-mtext data-semantic-annotation=\"clearspeak:unit\" data-semantic-font=\"normal\" data-semantic- data-semantic-parent=\"2\" data-semantic-role=\"unknown\" data-semantic-type=\"text\"&gt;&lt;mjx-c&gt;&lt;/mjx-c&gt;&lt;mjx-c&gt;&lt;/mjx-c&gt;&lt;/mjx-mtext&gt;&lt;mjx-script style=\"vertical-align: -0.15em;\"&gt;&lt;mjx-mn data-semantic-annotation=\"clearspeak:simple\" data-semantic-font=\"normal\" data-semantic- data-semantic-parent=\"2\" data-semantic-role=\"integer\" data-semantic-type=\"number\" size=\"s\"&gt;&lt;mjx-c&gt;&lt;/mjx-c&gt;&lt;/mjx-mn&gt;&lt;/mjx-script&gt;&lt;/mjx-msub&gt;&lt;mjx-mo data-semantic-added=\"true\" data-semantic- data-semantic-operator=\"infixop,⁢\" data-semantic-parent=\"9\" data-semantic-role=\"multiplication\" data-semantic-type=\"operator\" style=\"margin-left: 0.056em; margin-right: 0.056em;\"&gt;&lt;mjx-c&gt;&lt;/mjx-c&gt;&lt;/mjx-mo&gt;&lt;mjx-msub data-semantic-children=\"3,4\" data-semantic- data-semantic-parent=\"9\" data-semantic-role=\"unknown\" data-semantic-type=\"subscript\"&gt;&lt;mjx-mtext data-semantic-annotation=\"clearspeak:unit\" data-semantic-font=\"normal\" data-semantic- data-semantic-parent=\"5\" data-semantic-role=\"unknown\" data-semantic-type=\"text\"&gt;&lt;mjx-c&gt;&lt;/mjx-c&gt;&lt;mjx-c&gt;&lt;/mjx-c&gt;&lt;/mjx-mtext&gt;&lt;mjx-script style=\"vertical-align: -0.15em;\"&gt;&lt;mjx-mn data-semantic-annotation=\"clearspeak:simple\" data-semantic-font=\"normal\" data-semantic- data-semantic-parent=\"5\" data-semantic-role=\"integer\" data-semantic-type=\"number\" size=\"s\"&gt;&lt;mjx-c&gt;&lt;/mjx-c&gt;&lt;/mjx-mn&gt;&lt;/mjx-script&gt;&lt;/mjx-msub&gt;&lt;mjx-mo data-semantic-added=\"true\" data-semantic- data-semantic-operator=\"infixop,⁢\" data-semantic-parent=\"9\" data-semantic-role=\"multiplication\" data-semantic-type=\"operator\" style=\"margin-left: 0.056em; margin-right: 0.056em;\"&gt;&lt;mjx-c&gt;&lt;/mjx-c&gt;&lt;/mjx-mo&gt;&lt;mjx-mi data-semantic-annotation=\"clearspeak:simple\" data-semantic-font=\"normal\" data-semantic- data-semantic-parent=\"9\" data-semantic-role=\"latinletter\" data-semantic-type=\"identifier\"&gt;&lt;","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"41 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144260780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nano-kaolin enhances the mechanical, electrical, and thermal properties of cellulose insulating paper","authors":"Wenchang Wei,&nbsp;Yuye Zhang,&nbsp;Xuanhao Fu,&nbsp;Shengzhe Yuan,&nbsp;Chenxi Shi,&nbsp;Zhicheng Su,&nbsp;Shihao Luo,&nbsp;Haiqiang Chen,&nbsp;Junwei Zha,&nbsp;Yiyi Zhang","doi":"10.1049/hve2.70041","DOIUrl":"10.1049/hve2.70041","url":null,"abstract":"<p>There is an extremely urgent demand in the realm of power equipment, including power transformers, motors, and cables. Specifically, there is a pressing need for cellulose-based composite insulating paper that can exhibit high thermal conductivity, superior mechanical properties, and robust insulation characteristics. In response to this demand, this study adopted a ‘simulation-guided experimental research’ methodology. Firstly, based on molecular dynamics (MD) simulations, nano-kaolin (KL)/cellulose composite models with different contents were constructed. Then, according to the simulation results, the corresponding proportions of nano-KL/cellulose insulating paper were prepared. The simulation and experimental findings further reveal a significant effect of nano-KL. To be more precise, nano-KL can effectively fill the microscopic defects and voids within the cellulose structure. Moreover, nano-KL forms an orderly and regular thermal conductivity network in conjunction with cellulose. As a result, this network structure elevates the paper's overall thermal conductivity. Owing to its low-dielectric-loss characteristics, nano-KL reduces the microscopic charge polarisation phenomenon within the composite structure. It curbs the migration of electrons, alleviates the concentration of electric field stress, and ultimately improves the electrical insulation performance of the modified insulating paper. Notably, the 4 wt% nano-KL/cellulose insulating paper exhibits optimal performance, and its tensile strength, thermal conductivity, volume resistivity, dielectric loss, and breakdown strength are 55.81 MPa, 0.201 W·m⁻¹·K⁻¹, 4.58 × 10¹⁵ Ω·m, 0.25%, and 57.81 kV/mm. This study demonstrates MD simulations' feasibility and effectiveness in providing theories and protocols for experiments.</p>","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"10 3","pages":"646-659"},"PeriodicalIF":4.4,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70041","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144260861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"GSLI-RTMdet: An automatic nondestructive detection method for internal defects in gas-insulated switchgear X-DR images","authors":"Guote Liu, Zhihao Su, Bing Luo, Yongxuan Zhu","doi":"10.1049/hve2.70044","DOIUrl":"https://doi.org/10.1049/hve2.70044","url":null,"abstract":"Accurately identifying the location and type of internal defects in gas-insulated switchgear (GIS) is a challenge. To address this challenge, this study proposes a novel method for the nondestructive detection of GIS internal defects. This method is based on x-ray digital radiography (X-DR) technology and an improved real-time models for object detection (RTMdet) algorithm, namely GIS-specific localised internal defect-RTMdet. Firstly, the X-DR images of GIS are preprocessed by dynamic limit adaptive histogram equalisation algorithm to improve the images contrast. Then, a convolution shuffle upsample module for upsampling is proposed, which enlarges the defect feature map by multi-convolution and pixel shuffling, reduces the information loss, and enhances the interaction between the feature information. Finally, both the multi-channel attention net and the global attention mechanism are integrated into the neck network for enhancing local feature extraction and global information association. Experiments demonstrate that the proposed method achieves a mean average precision @0.5:0.95 of 94.9%, showcasing excellent overall performance and generalisation ability, and is more suitable for accurate nondestructive detection of internal defects of GIS in complex scenarios.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"12 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144260764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of Component Structure on Vibration and Noise of Converter Transformers Under Harmonic Excitation","authors":"Hao Wang, Li Zhang, Youliang Sun, Liang Zou","doi":"10.1049/hve2.70027","DOIUrl":"https://doi.org/10.1049/hve2.70027","url":null,"abstract":"The internal component structure of the converter transformer plays an extremely important role in the generation and propagation of vibration noise. In order to comprehensively reveal the influence of the component structure on the vibration and noise of converter transformers, this paper conducted vibration and noise experiments on different combinations of three iron core structures, four winding structures, two oil tank structures, two foot insulation structures and three positioning structures under different frequency harmonic excitations in a semi-anechoic chamber environment. The results show that the optimal configuration for minimising noise in converter transformers comprises the following components: an entanglement internal screen winding within the coil assembly, a 7.2 mm six-step-123 iron core, a cross-shaped reinforced oil tank, bottom foot insulation, an upper eccentric circle design and lower pouring positioning.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"9 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144260804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improved high-temperature electrical properties of polypropylene insulation material by grafting styrene","authors":"Xinhua Dong,&nbsp;Qing Shao,&nbsp;Yuanbo Cai,&nbsp;Qi Zhang,&nbsp;Wenjia Zhang,&nbsp;Shixun Hu,&nbsp;Shangshi Huang,&nbsp;Wei Wang,&nbsp;Qi Li,&nbsp;Jinliang He","doi":"10.1049/hve2.70058","DOIUrl":"10.1049/hve2.70058","url":null,"abstract":"<p>The electrical properties of polypropylene (PP) insulation material decrease dramatically at high temperature, which limits its application in harsh environments. This study investigates how grafting styrene (St) improves the high-temperature electrical properties of PP. Compared with pure PP, the space charge of the St-grafted PP (PP-g-St) samples is suppressed, the volume resistivity is significantly improved, and the breakdown strength at room temperature (30°C) and high temperature (90 and 110°C) is increased by 35.04%, 36.98% and 34.86%, respectively. The results show that the side chains generated by grafted St can increase the number of spherulites and improve the crystallinity, making the boundaries of the spherulites tortuous and narrow, which is not conducive to the formation of low-density regions. At the same time, because of the entanglement of grafted side chains and the presence of deep traps inside the PP-g-St samples, which inhibit the injection and migration of carriers, the effect of high temperature on the free volume is weakened. Consequently, the ability to capture charges at high temperature is enhanced, leading to an improvement in the high-temperature electrical properties of PP. This research can provide a reference for the development of high-performance grafted PP insulation materials.</p>","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"10 3","pages":"603-614"},"PeriodicalIF":4.4,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70058","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144260767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Laser Diode-in-Capacitors for High-Voltage Line Non-Contact Monitoring: Voltage, Electromagnetic Interference and Vibration Monitoring","authors":"Pengpeng Wang, Wei Huang, Hao Su, Junlong Li, Biao Xie, Jiawen Qiu, Baoran Shi, Yongai Zhang, Xiongtu Zhou, Tailiang Guo, Chaoxing Wu","doi":"10.1049/hve2.70010","DOIUrl":"https://doi.org/10.1049/hve2.70010","url":null,"abstract":"Power grid is an indispensable infrastructure in modern society, in order to ensure the normal operation of the grid, online non-contact monitoring of high-voltage lines is essential. In this work, a ‘capacitor–laser diode (LD)–capacitor’ structure, namely, laser diode in capacitors (LDIC), that can be used for non-contact monitoring of high-voltage (HV) line status by directly transferring the status information of the HV line to modulated laser pulses is proposed. The proposed LDIC can accurately extract the real-time voltage changes on the HV line with an accuracy level of 0.959%. Because the LDIC is sensitive to high-frequency electromagnetic field, the LDIC is successfully utilised to detect the external electromagnetic interference (EMI) to obtain the intensity and frequency of the external EMI. Additionally, the amplitude and frequency of the HV line vibration can be accurately monitored by using the LDIC. For the third-order curve fitting of vibration amplitude, the average error is only 0.00867, and the average error of linear fitting of vibration frequency is as low as 0.00655. This work provides a novel approach for the online monitoring of the HV line status and a new supplement for the development of power grid technology.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"36 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144260798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}