Understanding the space charge dynamics and its impact on insulation degradation in power transformers: A critical review

IF 3.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Electric Power Systems Research Pub Date : 2025-03-27 DOI:10.1016/j.epsr.2025.111644

Muhammad Rafiq , Markus H. Zink

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Abstract

The lifespan of HVDC transformers encounters a rising hazard from space charge accumulation in oil-paper insulation systems. Space charge involves the accumulation of electric charges inside a definite locality of a material or medium. Space charge dynamics relates to the migration and interaction of electric charges within this material or medium. In the context of power transformers, space charge dynamics imply the buildup and distribution of electric charges inside the medium/material. Space charges may impact the dielectric characteristics of the insulation, resulting in an event, e.g. electric field distortion, voltage breakdown (BD), and ultimately, insulation deterioration. Realizing and regulating space charge dynamics is critical for warranting power transformers' reliable function and life. Space charge dynamics may have a vital effect on the ageing and dielectric performance of insulation materials, eventually affecting the general functioning and reliability of transformers. A critical review of this subject would likely evaluate state-of-the-art research, methodologies, and prospective consequences for the industry. By gaining insight into how space charge dynamics prompt insulation deterioration, academics and engineers can develop more efficient techniques to improve the lifespan and performance of power transformers.

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来源期刊

Electric Power Systems Research 工程技术-工程：电子与电气

CiteScore

7.50

自引率

17.90%

发文量

963

审稿时长

3.8 months

期刊介绍： Electric Power Systems Research is an international medium for the publication of original papers concerned with the generation, transmission, distribution and utilization of electrical energy. The journal aims at presenting important results of work in this field, whether in the form of applied research, development of new procedures or components, orginal application of existing knowledge or new designapproaches. The scope of Electric Power Systems Research is broad, encompassing all aspects of electric power systems. The following list of topics is not intended to be exhaustive, but rather to indicate topics that fall within the journal purview. • Generation techniques ranging from advances in conventional electromechanical methods, through nuclear power generation, to renewable energy generation. • Transmission, spanning the broad area from UHV (ac and dc) to network operation and protection, line routing and design. • Substation work: equipment design, protection and control systems. • Distribution techniques, equipment development, and smart grids. • The utilization area from energy efficiency to distributed load levelling techniques. • Systems studies including control techniques, planning, optimization methods, stability, security assessment and insulation coordination.