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Surface Charge Characteristics of DC-GIL Insulator Under Multiphysics Coupled Field: Effects of Ambient Temperature, Load Current, and Gas Pressure

IEEE transactions on dielectrics and electrical insulation, 2022
In this article, the surface charge characteristics of the direct current gas-insulated transmission lines (DC-GIL) insulator under thermal–electric coupled fields are investigated.
Xiaolong Li   +3 more
semanticscholar   +1 more source

Electric Field Grading and Discharge Inception Voltage Improvement on HVDC GIS/GIL Spacer With Permittivity and Conductivity Graded Materials (ε/σ-FGM)

IEEE transactions on dielectrics and electrical insulation, 2022
Functionally graded materials (FGM) application with graded permittivity and conductivity is promising as an effective technique for electric field relaxation in SF6 gas around HVDC gas insulated switchgear (GIS)/gas insulated transmission line (GIL ...
.. Rachmawati   +4 more
semanticscholar   +1 more source

Simulation and Analysis on Motion Behavior of Metal Particles in AC GIL

IEEE transactions on dielectrics and electrical insulation, 2022
Metal particle contamination can seriously affect the reliability of gas-insulated metal enclose transmission line (GIL) and cause insulation failure. In this article, we investigate the metal particle motion patterns based on the entity model of GIL by ...
Zehua Wu   +6 more
semanticscholar   +1 more source

Study on Movement and Distribution Characteristics of Metal Particle Dust in DC GIL

IEEE transactions on dielectrics and electrical insulation, 2022
Gas-insulated transmission lines (GILs) have a wide application prospect in special occasions such as cross-terrain power transmission. Metal particle contamination is an important reason for low insulation performance of GIL.
Kang Ma   +4 more
semanticscholar   +1 more source

Electric Field Relaxation of HVDC GIL Spacer With Surface Conductivity Gradient Material (σ-SFGM) Using Electrospinning Technology

IEEE transactions on dielectrics and electrical insulation, 2022
This study discusses the application of the surface conductivity gradient materials ( $\sigma $ -SFGMs) for relaxing the electric field concentration around the epoxy-based spacer in high-voltage direct current gas-insulated transmission lines (HVDC GIL).
H. Yao   +4 more
semanticscholar   +1 more source

Towards the surface flashover in DC GIL/GIS: the electric field distribution and the surface charge accumulation

Physica Scripta, 2022
Under DC voltage, the interface charge of the spacer in gas-insulated metal-enclosed transmission lines (GIL) and gas-insulated metal-enclosed switchgear (GIS) is prone to accumulate, and the charge is an important factor to induce surface flashover.
Shaocong Wu   +7 more
semanticscholar   +1 more source

Gas Convection Affecting Surface Charge and Electric Field Distribution around Tri-post Insulators in ±800 kV GIL

IEEE transactions on dielectrics and electrical insulation, 2021
A multi-physics simulation model of the tri-post insulator in ±800 kV GIL laid horizontally is established to study the effects of gas convection on surface charges and electric field distribution.
B. Du   +4 more
semanticscholar   +1 more source

Multidimensional Functionally Graded Materials (ε/σ-MFGM) for HVDC GIL/GIS Spacers

IEEE transactions on dielectrics and electrical insulation, 2022
This study discusses the multidimensional functionally graded materials (MFGMs) for spacers in high voltage direct current gas-insulated transmission lines and switchgears (HVDC GILs/GISs). The effects of surface conductance graded materials ( $\sigma $ -
B. Du   +3 more
semanticscholar   +1 more source

How Temperature and Pressure Affect the Electric Field Distribution in HVDC GIS/GIL: A Numerical Study

IEEE transactions on dielectrics and electrical insulation, 2021
In this paper, an electro-thermal based surface charge accumulation model is established. Heat conduction, heat convection and heat radiation are included.
Yi Luo, Ju Tang, Zijun Pan, C. Pan
semanticscholar   +1 more source

Surface Charge Characteristics of DC-GIL Insulator Under Multiphysics Fields: 3-D Modeling

IEEE transactions on dielectrics and electrical insulation, 2022
Surface charge accumulation on the insulator of direct current gas-insulated transmission lines (DC-GILs) under thermal-electric multiphysics fields is investigated using the finite element method (FEM).
Xiaolong Li   +3 more
semanticscholar   +1 more source

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