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Gas-solid interface charge tailoring techniques: what we grasped and where to go.

Zhousheng Zhang1, Zheming Wang1, Gilbert Teyssedre2

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Surface charge tailoring techniques are reviewed to mitigate electric field issues in gas insulated equipment. This study offers a guide for engineers and researchers on charge suppression for improved safety and industrial application of HVDC GIL/GIS.

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Area of Science:

  • Electrical Engineering
  • Materials Science

Background:

  • Insulator charging alters electric fields, posing risks to gas insulated equipment safety.
  • Understanding and controlling surface charges is crucial for high-voltage direct current (HVDC) applications.

Purpose of the Study:

  • To classify and review surface charge tailoring techniques for insulators.
  • To compare and discuss technical solutions for charge accumulation suppression.
  • To provide guidance for engineers and researchers in charge tailoring methods.

Main Methods:

  • Introduction of a 'Dam-flood' model for classifying charge tailoring techniques.
  • Comparative analysis of different technical solutions for surface charge management.
  • Discussion of industrial considerations for charge-free insulator development.

Main Results:

  • A comprehensive classification of surface charge tailoring methods is presented.
  • Technical feasibility and effectiveness of various charge suppression strategies are evaluated.
  • Recommendations for future research and industrial implementation are provided.

Conclusions:

  • Effective charge tailoring is essential for enhancing the safety and reliability of gas insulated equipment.
  • This review serves as a handbook for charge tailoring methods, promoting charge-free insulators.
  • The findings support the industrial application of HVDC Gas Insulated Lines (GIL) and Gas Insulated Switchgear (GIS).