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Power Cables in Energy Systems
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Power Cables in Energy Systems

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "F1: Electrical Power System".

Deadline for manuscript submissions: 31 December 2024 | Viewed by 3727

Special Issue Editors

Dr. Zhonglei Li

E-Mail Website
Guest Editor
School of Electrical Automation and Information Engineering, Tianjin University, Tianjin 300072, China
Interests: advanced insulating materials for power cables and accessories; condition assessment; multiphysics simulation technologies for cable systems
Special Issues, Collections and Topics in MDPI journals
Dr. Yu Gao

E-Mail Website
Guest Editor
School of Electrical Automation and Information Engineering, Tianjin University, Tianjin 300072, China
Interests: ageing of polymer insulating material used under radioactive environment; nano-dielectrics; condition monitoring; diagnosis of power equipment
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Jinghui Gao

E-Mail Website
Guest Editor
State Key Laboratory of Electric Insulation and Power Equipment, Xi’an Jiaotong University, Xi'an 710049, China
Interests: functional dielectrics and their applications in piezoelectric, dielectric, and energy storage; cable technology; bioelectromagnetic effect

Special Issue Information

Dear Colleagues,

Power cables play a prominent role in power transmission at the global level, which are also likened to the "arteries" in energy systems. Nowadays, submarine cables used for offshore wind energy have further enriched this field. Therefore, various new technologies to improve the reliability of cable systems are particularly important, including but not limited to insulation technologies, design, testing and detection technologies, multiphysics simulation technologies, etc. In addition, we have also witnessed significant progress in the environmentally friendly insulation of power cables over the past decade. Therefore, this Special Issue aims to promote and disseminate recent advancements in theory, design, modeling, testing, and detection related to the application of power cables in energy systems.

In this Special Issue, original research articles and reviews are welcome. Research areas may include, but are not limited to, the following:

  • Insulation materials for cables and accessories;
  • Space charge characteristics;
  • Partial discharge and breakdown;
  • Environmentally friendly insulation;
  • Insulation condition assessment;
  • Condition monitoring for cable systems;
  • Sensors and signal analysis;
  • Lifetime prediction and reliability models;
  • Cables used in harsh environment;
  • Multiphysics simulation for cables and accessories;
  • Novel technologies for submarine cable systems.

We look forward to receiving your contributions.

Dr. Zhonglei Li
Dr. Yu Gao
Prof. Dr. Jinghui Gao
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • power cable
  • cable accessory
  • space charge
  • ageing
  • dielectric breakdown
  • condition monitoring
  • lifetime
  • multiphysics simulation

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Published Papers (4 papers)

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Research

13 pages, 5913 KiB  
Article
Electrical Tree and Partial Discharge Characteristics of Silicone Rubber Under Mechanical Pressure
by Jingang Su, Peng Zhang, Zhen Liu, Xingwang Huang, Xianhai Pang, Zeping Zheng and Tao Han
Energies 2024, 17(22), 5645; https://doi.org/10.3390/en17225645 - 12 Nov 2024
Viewed by 383
Abstract
Silicone rubber (SIR) is a crucial insulating material in cable accessories, but it is also susceptible to faults. In practical applications, mechanical pressure from bending or shrinking can impact the degradation of SIR, necessitating the study of its electrical tree and partial discharge [...] Read more.
Silicone rubber (SIR) is a crucial insulating material in cable accessories, but it is also susceptible to faults. In practical applications, mechanical pressure from bending or shrinking can impact the degradation of SIR, necessitating the study of its electrical tree and partial discharge (PD) characteristics under such pressure. This work presents the construction of a test platform for electrical trees under varying pressures to observe their growth process. A high-frequency current transformer is used to measure PD patterns during tree growth, enabling analysis of the effect of PD on tree initiation and propagation under pressure. The experimental results demonstrate a significant decrease in tree inception probability and increase in PD inception voltage under pressure. The pressure also influences the tree structure and PD during the treeing process, where the longest tree with a branch-like structure appears under 800 kPa. The effect of pressure on electrical tree and PD characteristics can be attributed to changes in free volume, alterations in air pressure within the tree channels, and the affected charge accumulation. Full article
(This article belongs to the Special Issue Power Cables in Energy Systems)
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13 pages, 2629 KiB  
Article
Effects of Water Absorption on the Insulating Properties of Polypropylene
by Rui Xi, Qiyang Jiang, Liang Cao, Chuping Li, Jiaxun He, Ya Zhang, Gaohui He, Yingang Gui and Chao Tang
Energies 2024, 17(18), 4576; https://doi.org/10.3390/en17184576 - 12 Sep 2024
Viewed by 546
Abstract
Moisture has been a crucial problem during the operation of cable systems. When we are faced with polypropylene (PP)-based insulation for the development of cable systems, there are few reports on the effects of water intrusion on the electrical performances of PP. In [...] Read more.
Moisture has been a crucial problem during the operation of cable systems. When we are faced with polypropylene (PP)-based insulation for the development of cable systems, there are few reports on the effects of water intrusion on the electrical performances of PP. In this study, the water absorption characteristics of isotactic PP (iPP) and atactic PP (aPP), as well as their effects on volume resistivity and relative permittivity, were investigated. The structure evolution during the water absorption process of the two PPs was also compared via infrared spectra and X-ray diffraction analyses. The results show that both of the two PPs show a saturation of water absorption at ~216 h, even though there are structural differences. And water intrusion into bulk could increase the interplanar spacing of iPP while decreasing the interplanar spacing of aPP. Moreover, with the increase in water absorption, the volume resistivity of the two PPs show a decreasing trend while the relative permittivity presents an increasing behavior, which shows an almost linear correlation. Full article
(This article belongs to the Special Issue Power Cables in Energy Systems)
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12 pages, 3848 KiB  
Article
Current Measurement of Three-Core Cables via Magnetic Sensors
by Jingang Su, Peng Zhang, Xingwang Huang, Xianhai Pang, Xun Diao and Yan Li
Energies 2024, 17(16), 4007; https://doi.org/10.3390/en17164007 - 13 Aug 2024
Viewed by 671
Abstract
Due to their compact structure and low laying cost, three-core power cables are widely used for power distribution networks. The three-phases of such cables are distributed symmetrically with a 120° shift to each other. Phase current is an important parameter to reflect the [...] Read more.
Due to their compact structure and low laying cost, three-core power cables are widely used for power distribution networks. The three-phases of such cables are distributed symmetrically with a 120° shift to each other. Phase current is an important parameter to reflect the operation state of the power system and three-core cable. Three-core symmetrical power cables use a common shield, leading to magnetic field cancelation outside the cable during steady operation. Thus, traditional magnetic-based current transformers cannot measure the phase current on three-core cable non-invasively. In order to measure the phase current more conveniently, a phase current measurement method for three-core cables based on a magnetic sensor is proposed in this paper. Nonlinear equations of a phase current and the magnetic field of a measuring point are constructed. The calculated magnetic field distribution of the three-core cable is verified using a finite element simulation. The effectiveness of the measurement method is further validated through experiments. This proposed method is able to conveniently detect the phase current of three-core power cables, which can help cable maintenance. Full article
(This article belongs to the Special Issue Power Cables in Energy Systems)
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15 pages, 2294 KiB  
Article
Breakdown Performance Evaluation and Lifetime Prediction of XLPE Insulation in HVAC Cables
by Zhonglei Li, Yuming Dong, You Wu, Zhengzheng Meng, Pengxian Song, Mingzheng Zhu, Xu Li and Boxue Du
Energies 2024, 17(6), 1337; https://doi.org/10.3390/en17061337 - 11 Mar 2024
Cited by 5 | Viewed by 1656
Abstract
This article presents the recent developments in the field of evaluation of the breakdown performance and remaining lifetime of XLPE insulation and analyzes the accuracy of existing lifetime prediction models through experiments. The effects of the crystalline morphology, cable thickness and sampling location [...] Read more.
This article presents the recent developments in the field of evaluation of the breakdown performance and remaining lifetime of XLPE insulation and analyzes the accuracy of existing lifetime prediction models through experiments. The effects of the crystalline morphology, cable thickness and sampling location of XLPE insulation on the evaluation of short-term breakdown performance are reviewed in the context of the experiments. The study reviews the application of the Ramu, Simoni, and Ramu multi-stress lifetime prediction models and explores the other remaining lifetime prediction models under the combined electrothermal stresses which are applicable to XLPE insulation. Finally, this paper recommends the most effective engineering evaluation methods and provides suggestions for improving the electrical performance of XLPE insulation for high-voltage cables. Full article
(This article belongs to the Special Issue Power Cables in Energy Systems)
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Displaying articles 1-4

Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Partial discharge acoustic signals detection technology for XLPE cable using DFB fiber laser
Authors: Weichao Zhang
Affiliation: Harbin University of Science and Technology

Title: Solid insulation partial discharge detection of low intensity noise fiber laser based on polarized light interference
Authors: Zhenpeng Zhang; Zhengbo Liang; Junping Hou; Li Chen; Lin Tang; Mingzhong Xu
Affiliation: China Electric Power Research Institute, Wuhan 430074, China
Abstract: Partial discharge is an important manifestation of cable insulation failure. On-line monitoring of the cable and timely detection of partial discharge in the cable are of great significance to ensure the normal operation of the cable. Fiber laser based on fiber Bragg grating structure has been widely studied for partial discharge detection of power equipment due to its extremely narrow line width and wide frequency response characteristics. However, its demodulation system is not only bulky and complex, but also easy to introduce large noise. Aiming at the above problems, this paper designs a demodulation system based on polarization heterodyne, and studies the theory of external optical feedback. Based on the relationship between external optical feedback coefficient and DFB output ray width, an optical feedback suppression system is proposed to suppress the influence of external optical feedback on DFB fiber ultrasonic sensing system and reduce the laser linewidth. The partial discharge detection platform of solid insulation is built, and the noise suppression of the optical feedback suppression system is verified. The feasibility of DFB polarization heterodyne detection system for partial discharge detection of solid dielectric is illustrated..

Title: Effects of Water Absorption on the Electrical Properties of Polypropylene Cable Insulation
Authors: Liang Cao; Chao Tang
Affiliation: Southwest University

Title: Effect of β-Crystals on Electrical Tree Characteristics of Polypropylene Cable Insulation
Authors: Zhuoran Yang; Tao Han
Affiliation: Tianjin University

Title: Partial Discharge Signal Measurement and Analysis with Different Bandwidth HFCT in Power Cable
Authors: Wenbo Zhu
Affiliation: China Southern Power Grid Electric Power Research Institute

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