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Electrical Equipment State Measurement and Intelligent Calculation: 2nd Edition
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Electrical Equipment State Measurement and Intelligent Calculation: 2nd Edition

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

Deadline for manuscript submissions: 10 June 2026 | Viewed by 921

Special Issue Editor

Prof. Dr. Jingang Wang

E-Mail Website
Guest Editor
School of Electrical Engineering, Chongqing University, Chonqing 400044, China
Interests: electrical equipment monitoring; advanced sensing; measurement; electromagnetic calculation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Building an energy internet situational awareness system with comprehensive coverage and precise feedback is an important development trend. Insulation fault monitoring and diagnosis for electrical equipment is of great significance for real-time environmental monitoring, field-source structure calculation, overvoltage sensing, equipment commissioning status judgment, electric field radiation safety assessment, and insulation reliability inspection for power transmission, which have important application value. It also has broad application prospects in aerospace, ocean, industry, and other fields.

This Special Issue aims to present and disseminate the most recent advances related to the theory, design, modeling, application, measurement, and condition monitoring in insulation fault monitoring and diagnosis for electrical equipment.

Prof. Dr. Jingang Wang
Guest Editor

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 250 words) can be sent to the Editorial Office for assessment.

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

  • modeling
  • design
  • fault diagnosis
  • hydrogen energy
  • engineering electromagnetic field application
  • non-contact measurement

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Related Special Issue

Published Papers (2 papers)

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Research

17 pages, 6990 KB  
Article
Distributed De-Icing Approach for Overhead Ground Wires Based on AC Power Supply with Thermodynamic Validation
by Yongliang Yi, Xiaofu Xiong, Changli Yu, Junyu Zhu and Jingang Wang
Energies 2026, 19(10), 2474; https://doi.org/10.3390/en19102474 - 21 May 2026
Viewed by 139
Abstract
The accumulation of ice on power lines severely affects the safety of power systems. Conventional ice melting methods suffer from poor flexibility and adaptability, accompanied by high power consumption. As a novel technical approach, distributed ice melting deploys modular and movable ice melting [...] Read more.
The accumulation of ice on power lines severely affects the safety of power systems. Conventional ice melting methods suffer from poor flexibility and adaptability, accompanied by high power consumption. As a novel technical approach, distributed ice melting deploys modular and movable ice melting units at key sections of overhead ground wires, which generate heat on site according to the actual icing conditions of icing segments, and imposes high requirements on the miniaturization of ice melting equipment as well as the regulation strategy of ice melting current. This study proposes a distributed ice melting method for overhead ground wires based on AC power supply, which can adjust the current in accordance with the specific demands of wire protection and ice melting for different line sections. The feasibility and effectiveness of the proposed method are verified through thermodynamic simulations and experimental tests. The de-icing method injects power–frequency AC into the overhead ground wire through a Scott transformer combined with a series capacitor reactive power compensation structure, enabling on-demand regulation by adjusting capacitor switching strategies and transformer operating modes. This approach balances efficiency and flexibility. Based on a reactive power compensation capacity current control strategy and thermodynamic analysis, an electro-thermal-fluid field coupling simulation model for the experimental ground wire was developed. The current regulation strategies for different environmental and operating conditions were calculated and validated. The simulation results show that, under different conditions, the adjustable current effective values of the de-icing system in this model range from 101 to 380 A (line maintenance current), 304 to 622 A (critical de-icing current), and 661 to 1121 A (maximum de-icing current). Field tests demonstrate that this method can stably achieve AC de-icing and current control. For the experimental JLB40-150 model ground wire, adjusting the injected current to 350 A enables safe operation under line maintenance conditions, with a limit not exceeding 400 A. This paper provides a more efficient, flexible, controllable, and widely applicable method for the de-icing of overhead ground wires. Full article
(This article belongs to the Special Issue Electrical Equipment State Measurement and Intelligent Calculation: 2nd Edition)
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21 pages, 1284 KB  
Article
Noncontact Current Measurement Method for Multicore Cables Considering Nonlinear Effects of Steel Tape Armor
by Lihan Wang, Qishuai Liang, Jiang Ye, Chuan Zhou, Jie Li, Yufeng Wu, Xiaohu Liu and Shisong Li
Energies 2026, 19(7), 1594; https://doi.org/10.3390/en19071594 - 24 Mar 2026
Viewed by 398
Abstract
Steel tape armored multicore cables are critical components in the transmission and distribution of power in medium- and low-voltage networks. It is difficult to measure current in the individual conductors of multicore cables because they are enclosed within multilayer protective structures (e.g., armor). [...] Read more.
Steel tape armored multicore cables are critical components in the transmission and distribution of power in medium- and low-voltage networks. It is difficult to measure current in the individual conductors of multicore cables because they are enclosed within multilayer protective structures (e.g., armor). The magnetic field–current inversion method provides a noncontact alternative for measuring conductor currents, derived from externally measured magnetic fields. However, the nonlinear magnetization effects of the steel tape armor disrupt the linear relationship between the magnetic field and currents, making accurate measurements challenging. To address this issue, we propose a noncontact current measurement method that incorporates the nonlinear effects of the armor layer. This method involves pre-calibrating the coefficient matrices, determining the angle formed between the magnetic sensor array and the multicore cable, and applying nonlinear fitting. This achieves a current measurement accuracy less than 5% and 5° in relative error and phase error, respectively. The proposed method avoids computationally intensive inverse operations, thereby enabling the realization of lightweight, low-cost current measurement terminals for practical field applications. Full article
(This article belongs to the Special Issue Electrical Equipment State Measurement and Intelligent Calculation: 2nd Edition)
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