High Voltage最新文献

Design and 3D Printing of Ceramic Insulation for Surface Flashover Mitigation in Vacuum 真空表面闪络陶瓷绝缘材料的设计与3D打印

IF 4.4 2区工程技术

High Voltage Pub Date : 2025-09-30 DOI: 10.1049/hve2.70104

Chao Wang, Yulong Yang, Xinru Shi, Xiong Yang, Guangyu Sun, Zhaoquan Chen, Sile Chen, Xing Jin, Songlin Ran, Guanjun Zhang

{"title":"Design and 3D Printing of Ceramic Insulation for Surface Flashover Mitigation in Vacuum","authors":"Chao Wang, Yulong Yang, Xinru Shi, Xiong Yang, Guangyu Sun, Zhaoquan Chen, Sile Chen, Xing Jin, Songlin Ran, Guanjun Zhang","doi":"10.1049/hve2.70104","DOIUrl":"https://doi.org/10.1049/hve2.70104","url":null,"abstract":"Poor electrical strength of the ceramic–vacuum interface restricts the development of various electrical/electronic devices. Limitations of solutions based on conventional ceramics fabrication procedures are becoming prominent with the further demand for compactness and performance improvement. In this study, a fabrication method utilising 3D printing technology is proposed to construct ceramic insulation with designed structures. The processing characteristics, dielectric properties and morphologies of 3D-printed ceramics fabricated under different processing parameters were analysed. The results indicated that fillers' particle size, sintering temperature and sintering aids have significant influence on the dielectric properties and the internal defects. Finally, with optimised processing parameters, Al2O3 ceramics with low dielectric loss and complex structures were fabricated to inhibit vacuum flashover from the perspectives of electric field optimisation and secondary electron emission suppression. Compared with traditional ceramic insulator fabrication methods, the proposed construction strategy has an accurate and efficient fabrication process and high insulation performance, making it promising for industrial applications.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"6 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145209684","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}

引用次数: 0

Lightning-Induced Overvoltage on Overhead Distribution Line via Hybrid MTL-PEEC Method 基于混合MTL-PEEC方法的架空配电线路雷击过电压分析

IF 4.4 2区工程技术

High Voltage Pub Date : 2025-09-29 DOI: 10.1049/hve2.70095

Runyu Fu, Jinxin Cao, Yating Zhao, Jianguo Wang, Yaping Du, Li Cai, Mi Zhou, Yuxuan Ding

{"title":"Lightning-Induced Overvoltage on Overhead Distribution Line via Hybrid MTL-PEEC Method","authors":"Runyu Fu, Jinxin Cao, Yating Zhao, Jianguo Wang, Yaping Du, Li Cai, Mi Zhou, Yuxuan Ding","doi":"10.1049/hve2.70095","DOIUrl":"https://doi.org/10.1049/hve2.70095","url":null,"abstract":"Transient simulation are more economical and adaptable means of studying lightning overvoltage for overhead distribution line system compared to experiments. A hybrid multi-transmission-line (MTL)-partial element equivalent circuit (PEEC) method proposed for lightning-induced electromagnetic pulse (LEMP) simulation is verified using the rocket-triggered experimental results under a more complex line configuration for the first time. This method can improve computational efficiency while ensuring calculation accuracy. The agreement between experimental and simulation results further validates the adaptability and accuracy of the proposed method, which is adopted to calculate the LEMP on the extended double-circuit parallel unequal length line. The effects of various factors, such as the strike-point location, the amplitude and waveform of the lightning current, the line shape and length on the amplitude of overvoltage and pole flashover along the line are discussed. For double-circuit distribution lines, when lightning strikes the ground in front of centre of circuit I, the three-phase voltage waveforms are similar, all of which are negative or bipolar oscillation waves. The closer the lightning strike point is to the line, the greater the amplitude of the lightning current, and the voltage waveform develops towards a bipolar waveform, but the main peak remains negative. As the amplitude of lightning current increases, the maximum lightning-induced voltage amplitude along the line increases. The LEMP caused by the subsequent return-stroke current is always greater than that caused by the first return-stroke current. When the grounding resistance increases, the maximum voltage peak amplitude along the line remains unchanged.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"86 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145209685","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}

引用次数: 0

Investigation of the Impact of XLPE Cable Ageing on Impedance Mismatch Characteristics and Unbalanced Behaviour in Hybrid Operation Systems 交联聚乙烯电缆老化对混合运行系统阻抗失配特性和不平衡行为影响的研究

IF 4.4 2区工程技术

High Voltage Pub Date : 2025-09-29 DOI: 10.1049/hve2.70106

Liang Zou, Zheng Liu, Qingsong Liu, Zhiyun Han, Shoushui Han

{"title":"Investigation of the Impact of XLPE Cable Ageing on Impedance Mismatch Characteristics and Unbalanced Behaviour in Hybrid Operation Systems","authors":"Liang Zou, Zheng Liu, Qingsong Liu, Zhiyun Han, Shoushui Han","doi":"10.1049/hve2.70106","DOIUrl":"https://doi.org/10.1049/hve2.70106","url":null,"abstract":"In the Hainan–Guangdong interconnection project, oil leakage in oil-filled cables required replacing the faulty core with a single core from a three-core cross-linked polyethylene (XLPE) cable, leading to mixed operation of XLPE and oil-filled cables. However, systematic quantitative analysis on the three-phase unbalance caused by differences in material parameters between the two cable types is lacking. This study focuses on the mixed operation system, using a real-time digital simulation platform to build power flow and current distribution models. Finite element thermal analysis and accelerated thermal ageing experiments were conducted to reveal the evolution of XLPE cable insulation dielectric parameters during ageing. Two evaluation indices, the impedance mismatch coefficient and the length mismatch coefficient, were proposed to quantify how material degradation worsens system unbalance. Results show that after 1440 h of ageing, the system's negative-sequence and zero-sequence unbalance increased by 24.4% and 28.7%, respectively. A critical impedance mismatch threshold is identified; once exceeded, unbalance escalates and the system's stability margin diminishes. This research provides theoretical support for recognising ageing-induced sequence impedance mismatch and related unbalance effects in hybrid submarine cable systems and lays a foundation for optimising operational stability and designing compensation strategies.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"8 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145209683","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}

引用次数: 0

Spectral Characteristics and Evolution Mechanism of Silicon Rubber Surface Discharge Under Thermal Ageing Condition 热老化条件下硅橡胶表面放电的光谱特征及演化机理

IF 4.4 2区工程技术

High Voltage Pub Date : 2025-09-25 DOI: 10.1049/hve2.70067

Yanze Han, Liankang Zhang, Beibei Sun, Lu Liu, Guochang Li, Shengtao Li, Yanhui Wei

{"title":"Spectral Characteristics and Evolution Mechanism of Silicon Rubber Surface Discharge Under Thermal Ageing Condition","authors":"Yanze Han, Liankang Zhang, Beibei Sun, Lu Liu, Guochang Li, Shengtao Li, Yanhui Wei","doi":"10.1049/hve2.70067","DOIUrl":"https://doi.org/10.1049/hve2.70067","url":null,"abstract":"Surface discharge is a typical fault type in electric power equipment. High temperature in long-term operation can easily lead to ageing of materials, resulting in changes in surface characteristics and surface discharge faults. In this paper, a method of surface discharge identification of silicon rubber (SiR) based on spectral detection technology is presented. The surface discharge spectral characteristics of SiR with different ageing degrees are investigated, and the changes of microphysical and chemical properties and surface insulation properties caused by thermal ageing are analysed. The dynamic evolution of charge during surface discharge is simulated. The experimental results show that the spectral intensity of the surface discharge of the SiR material is mainly concentrated at 350, 600 and 750–900 nm bands. The spectral intensity reaches the maximum value when the ageing time is 168 h. With the intensification of ageing, no new characteristic peaks generate in the discharge spectrum, but the proportion of the same characteristic peaks to the overall wavelength is different. The type of discharge material and ageing state are determined by the characteristic light intensity ratio Ib. The evolutionary mechanism of the discharge spectrum is revealed by the variation of flashover voltage, trap charge density, resistivity and other parameters. The simulation results show that the increase of electron density will lead to more intense electron collision, which will release more photons, resulting in enhanced spectral intensity. This work can provide a reference for the detection of surface discharge and the evaluation of ageing state of the equipment inside the high voltage box.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"154 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145140566","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}

引用次数: 0

Bioactive Anti-Inflammatory and Antibacterial Plasma-Activated Air for Healing of Infected Wounds 生物活性抗炎抗菌血浆活化空气用于感染伤口愈合

IF 4.4 2区工程技术

High Voltage Pub Date : 2025-09-20 DOI: 10.1049/hve2.70072

Xixi Jing, Zizhu Zhang, Fugao Zhang, Zijin Wu, Dingxin Liu, Hao Zhang, Yilin Wang, Jishen Zhang, Zifeng Wang, Li Guo, Mingzhe Rong, Paul K. Chu

{"title":"Bioactive Anti-Inflammatory and Antibacterial Plasma-Activated Air for Healing of Infected Wounds","authors":"Xixi Jing, Zizhu Zhang, Fugao Zhang, Zijin Wu, Dingxin Liu, Hao Zhang, Yilin Wang, Jishen Zhang, Zifeng Wang, Li Guo, Mingzhe Rong, Paul K. Chu","doi":"10.1049/hve2.70072","DOIUrl":"https://doi.org/10.1049/hve2.70072","url":null,"abstract":"Cold atmospheric plasmas are widely used in biomedicine. Although direct plasma treatments of wounds have been demonstrated, there are still obstacles hampering further clinical adoption, for example, the limited treatment area, inconsistent actions and risk of thermal injury. In this respect, plasma-activated air (PAA) is proposed and demonstrated for infected wounds treatment as an alternative to the conventional direct plasma treatment. The combination of gliding arc discharge reactor and dielectric barrier discharge reactor produces highly bioactive PAA. In in vitro sterilisation of Staphylococcus aureus, approximately 9-log reduction is achieved after the PAA treatment for 6 min. Bovine serum albumin is added to the S. aureus suspension to further simulate the wound exudate to accomplish inactivation of approximately 3-log reduction after 10 min. In vivo experiments show that the PAA treatment of infected wounds significantly reduces the bacterial load and improves the healing rate, revealing an optimal treatment time of 3 min/day. The immunohistochemical and blood biochemical analyses show that the PAA-3 min treatment enhances wound healing by inhibiting the tissue inflammatory response and inducing growth factor production without showing evident systemic toxicity. In conclusion, PAA holds great clinical promise as a safe and effective wound-healing strategy.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"88 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145089928","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}

引用次数: 0

Evaluation of Moisture Ageing Status of Cross-Linked Polyethylene Insulation in Power Cables at Different Temperatures 不同温度下电力电缆交联聚乙烯绝缘的水分老化状态评价

IF 4.4 2区工程技术

High Voltage Pub Date : 2025-09-20 DOI: 10.1049/hve2.70068

Wen Luo, Rui Lan, Xingda Li, Guochang Li, Yanhui Wei, Shengtao Li, Yubing Duan, Qingwen Xu

{"title":"Evaluation of Moisture Ageing Status of Cross-Linked Polyethylene Insulation in Power Cables at Different Temperatures","authors":"Wen Luo, Rui Lan, Xingda Li, Guochang Li, Yanhui Wei, Shengtao Li, Yubing Duan, Qingwen Xu","doi":"10.1049/hve2.70068","DOIUrl":"https://doi.org/10.1049/hve2.70068","url":null,"abstract":"Cross-linked polyethylene (XLPE) cables play an important role in power systems to transport electrical energy, and moisture is one of the important predisposing factors for insulation failure in medium and high-voltage cables. In this paper, a temperature-moisture accelerated ageing experiment is designed, and a method for assessing the moisture status of cable insulation is proposed. This is achieved by analysing the frequency-domain dielectric-spectral curves of samples exposed to different levels of moisture and calculating the integral value of the tangent angle of the low-frequency (0.1–1 Hz) dielectric loss as the characteristic parameter. Firstly, according to the principle of time–temperature superposition, the reduced relationship model between ageing time and ageing temperature is established. Secondly, the experimental data are analysed by nonlinear regression method, and the intrinsic relationship between ageing time, temperature, moisture content and ageing characteristic quantity is established, respectively. Based on the above results, the temperature–moisture coupling coefficient is further revised, and the equation of the ageing status of XLPE insulated cables under the two-factor coupling of temperature-dampness is established. Lastly, the accuracy of the model is verified by using laboratory ageing samples and returned cables. The results indicate that the model achieves an accuracy of 95.49% under controlled laboratory conditions. Then the service life of the returned cable is quantitatively analysed, and the calculated results are within the range of the model. This work has important guiding significance for the assessment of ageing status of power cables.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"29 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145089923","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}

引用次数: 0

Thermal Conductive Network Construction and Enhanced Thermal Conductivity in Mica Tape Composites for Large Generators by Pre-Placed h-BN@PDA-Modified Mica Paper 预置云母纸构建大型发电机用云母带复合材料导热网络及增强导热性能h-BN@PDA-Modified

IF 4.4 2区工程技术

High Voltage Pub Date : 2025-09-19 DOI: 10.1049/hve2.70043

Zhonghua Zhang, Yu Feng, Xuesong Chen, Dongyue Wang, Zhanyi Wang, Liang Liang, Dong Yue, Qingguo Chen

{"title":"Thermal Conductive Network Construction and Enhanced Thermal Conductivity in Mica Tape Composites for Large Generators by Pre-Placed h-BN@PDA-Modified Mica Paper","authors":"Zhonghua Zhang, Yu Feng, Xuesong Chen, Dongyue Wang, Zhanyi Wang, Liang Liang, Dong Yue, Qingguo Chen","doi":"10.1049/hve2.70043","DOIUrl":"https://doi.org/10.1049/hve2.70043","url":null,"abstract":"The lower thermal conductivity (TC) of mica tape hinders the evolution of large generators towards higher voltage and capacity. To enhance the TC of the mica tape, with the help of the three-dimensional (3D) multi-layer framework of the mica paper, a 3D polydopamine-coated boron nitride (h-BN@PDA) TC network was constructed by pre-placing h-BN@PDA inside the mica paper. Additionally, the above mica paper and epoxy-impregnated glass fabric were pressed to manufacture mica tape composites. Although the h-BN percentage remained constant, the TC of the h-BN@PDA/mica paper (or tape) composites could be further enhanced by depositing PDA over the h-BN surface. The TC of the 25wt.% h-BN@PDA/mica paper and mica tape composites reached 1.12 and 0.435 W/(m·K), which were 169.23% and 83.5% in comparison to pure mica paper and mica tape, respectively, also higher than those of the 25wt.% h-BN/mica paper and mica tape composites (1.07 and 0.416 W/(m·K), respectively). As calculated from theoretical modelling, this enhancement is due to the ability of the PDA coating to act as a ‘bridge’ to reduce the interfacial thermal resistance (ITR). In conclusion, the 3D TC network construction method in this research offers a new concept and strategy for manufacturing high-TC mica tapes.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"1 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145089930","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}

引用次数: 0

Insulation Resilience Response in High-Voltage Power Equipment: Theories, Methods and Application Guidelines 高压电力设备的绝缘回弹响应：理论、方法和应用指南

IF 4.4 2区工程技术

High Voltage Pub Date : 2025-09-18 DOI: 10.1049/hve2.70102

Xize Dai, Jian Hao, Alberto Rumi, Claus Leth Bak, Ruijin Liao

{"title":"Insulation Resilience Response in High-Voltage Power Equipment: Theories, Methods and Application Guidelines","authors":"Xize Dai, Jian Hao, Alberto Rumi, Claus Leth Bak, Ruijin Liao","doi":"10.1049/hve2.70102","DOIUrl":"https://doi.org/10.1049/hve2.70102","url":null,"abstract":"The multifrequency voltage (MFV) stress, including switching impulses and harmonics, commonly appearing in the modern power system will stimulate the multifrequency impedance dynamics behaviours of electrical insulation. Therefore, this article presents a novel concept of insulation resilience response (IRR) by employing polymer insulation materials, which may be extended to electrical insulation resilience (EIR). The focus is on understanding reversible recovery performance and supporting physics-informed condition assessment for electrical insulation exposed to MFV. The underlying physical mechanisms and modelling methodologies are integrated to characterise the IRR behaviours of polymer insulation systems. The multifrequency dielectric/impedance properties of different resin dielectrics under diverse temperatures are comparatively investigated as proof-of-concept cases. Furthermore, multidimensional sensitivity indicators are developed to quantify the electrical insulation resilience behaviour. A radar plot representation integrating resilience sensitivity indicators qualitatively assesses the IRR behaviours of polymer insulation systems. Additionally, a quantification methodology, including the resilience index (RI) and time-varied RI (TVRI), is proposed for the reversible recovery performance analysis for electrical insulation, respectively. Ultimately, an application-oriented framework derived from TVRI is provided to analyse the recovery performance evolution behaviours of electrical insulation under complex operating conditions. This offers a key theoretical foundation for insulation performance characterisation and condition analysis for high-voltage power equipment.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"7 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145089932","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}

引用次数: 0

Optical Imaging-Based 3D Reconstruction of Electrical Tree in Polypropylene Cable Insulation Under Mechanical Bending 基于光学成像的机械弯曲聚丙烯电缆绝缘电气树三维重建

IF 4.4 2区工程技术

High Voltage Pub Date : 2025-09-18 DOI: 10.1049/hve2.70103

Heyu Wang, Zhonglei Li, Guoning Sun, Boxue Du

{"title":"Optical Imaging-Based 3D Reconstruction of Electrical Tree in Polypropylene Cable Insulation Under Mechanical Bending","authors":"Heyu Wang, Zhonglei Li, Guoning Sun, Boxue Du","doi":"10.1049/hve2.70103","DOIUrl":"https://doi.org/10.1049/hve2.70103","url":null,"abstract":"This study proposes a nondestructive optical imaging-based three-dimensional (3D) reconstruction method to analyse electrical tree propagation in polypropylene (PP) cable insulation under mechanical bending. The technique combines focus-stacked optical imaging with a feature fusion algorithm to segment in-focus regions across depth layers, enabling 3D reconstruction of electrical trees in PP homopolymer (PPH), block copolymer (PPB) and elastomer-blended (PP/TPE) samples. The results demonstrate that mechanical bending accelerates electrical tree propagation in PPH, and that degradation channels transition from a branch-like to a straight-stick morphology, tending to grow directionally towards stretched regions. With a bending radius of 10 mm, the breakdown time drops from 297.0 min for the undeformed samples to 6.3 min. PPB and PP/TPE delay the time to breakdown by 70.6% and 171.2%, respectively, highlighting their superior resistance under bending stress, which is attributed to maintaining elasticity rather than yield deformation under bending stresses. This study provides a novel tool for evaluating the electrical tree resistance of PP composites under the mechanical stress, guiding the development of recyclable high-voltage direct current cable insulation.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"40 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145089495","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}

引用次数: 0

Investigating New Approaches for Optimal Energisations of DC Cables: The Stepwise Energisation Technique 研究直流电缆优化激励的新方法：逐步激励技术

IF 4.4 2区工程技术

High Voltage Pub Date : 2025-09-17 DOI: 10.1049/hve2.70084

Gian Carlo Montanari, Sukesh Babu Myneni, Grazia Berardi, Marco Albertini, Stefano Franchi Bononi

{"title":"Investigating New Approaches for Optimal Energisations of DC Cables: The Stepwise Energisation Technique","authors":"Gian Carlo Montanari, Sukesh Babu Myneni, Grazia Berardi, Marco Albertini, Stefano Franchi Bononi","doi":"10.1049/hve2.70084","DOIUrl":"https://doi.org/10.1049/hve2.70084","url":null,"abstract":"This paper focuses on the energisation of high voltage DC (HVDC) and medium voltage DC (MVDC) insulation systems, referring mainly to cables for both theoretical development and validation testing. Cable system energisation can be frequent during its lifetime, and it can possibly be affected by partial discharges (PD), because of manufacturing, laying, ageing, interfaces or structural cavities (as butt gaps). A theory-driven and measurement-based procedure is presented in this paper, having the purpose to minimise PD inception risk. This procedure is based on stepwise voltage application during cable energisation. The fundamental idea behind the proposed approach stems from considering that the jump voltage is the trigger of PD occurrence. Indeed, the jump voltage, and the consequent electric field variation, directly relates to AC PD inception voltage (PDIVAC). In addition, the electric field distribution in an insulation system is driven by insulation permittivity (capacitance) during voltage transients, and by conductivity in DC, thus the PDIVAC is generally smaller than DC PD inception voltage (PDIVDC). Hence, energising a DC cable by an initial step lower than PDIVAC, and then increasing the voltage in steps smaller than PDIVAC, would minimise the risk of PD inception during transients and the relevant degradation rate. However, this does not change, the risk of occurrence (if any) of low-repetition partial discharges at DC steady state. Effectiveness of the proposed technique is proved by the help of tests performed on cables with artificial surface and internal defects. It is shown that compared with the conventional energisation consisting of rapidly increasing voltage, the stepwise approach can reduce the risk of PD inception and related extrinsic ageing, even for the steady state voltages larger than PDIVDC.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"89 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145089312","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}

引用次数: 0