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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

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

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

A Novel Optical Localization Method for Partial Discharge Source Using ANFIS Virtual Sensors and Simulation Fingerprint in GIL

IEEE Transactions on Instrumentation and Measurement, 2021
Partial discharge (PD) detection and localization is one of the most effective methods in gas-insulated transmission lines (GIL) insulation fault diagnosis, which is important to the early troubleshooting and safe operation. Compared with the widely used
Y. Zang   +6 more
semanticscholar   +1 more source

Short-time X-ray Irradiation as a Non-contact Charge Dissipation Solution for Insulators in HVDC GIS/GIL

IEEE transactions on dielectrics and electrical insulation, 2021
The demand for DC gas-insulated switchgear/gas-insulated transmission line (GIS/GIL) becomes more and more urgent in recent years owing to the rapid development of high voltage direct current (HVDC) transmission systems.
Feng Wang   +5 more
semanticscholar   +1 more source

Method of GIL partial discharge localization based on natural neighbour interpolation and ECOC‐MLP‐SVM using optical simulation technology

High Voltage, 2021
Key Technology for Environmentally Friendly Gas‐ In, Grant/Award Number: 2017YFB0902500 Abstract Partial discharge (PD) is one of themain causes rendering the deterioration of the insulation state in gas‐insulated transmission line (GIL).
Y. Zang   +5 more
semanticscholar   +1 more source

Random Distribution and Adsorption Characteristics of Metal Particles and Visualization Algorithm for DC GIS/GIL

IEEE transactions on dielectrics and electrical insulation
The metal dust moving inside the HVDC GIS/GIL will be easily adsorbed to the surface of the insulator and cause surface discharge. The study of the movement and adsorption characteristics of metal dust is extremely important.
Yutong Zhang   +7 more
semanticscholar   +1 more source

SAFE-GIL: SAFEty Guided Imitation Learning for Robotic Systems

IEEE International Conference on Robotics and Automation
Behavior cloning (BC) is a widely used approach in imitation learning where a robot learns a control policy by observing an expert supervisor. However the learned policy can make errors and might lead to safety violations which limits their utility in ...
Yusuf Umut Ciftci   +4 more
semanticscholar   +1 more source

Charge interaction behaviors at interfacial domains in DC GIL insulators

Applied Physics Letters
Long-term operation of high voltage direct current at elevated temperatures can result in the accumulation of surface charges in DC gas-insulated transmission line (GIL) insulators.
Xi Pang   +6 more
semanticscholar   +1 more source

Partial discharge behavior of protrusion on high voltage conductor in GIS/GIL under high voltage direct current: Comparison of SF6 and SF6 alternative gases

IEEE transactions on dielectrics and electrical insulation, 2020
Recent studies have demonstrated that fluoronitrile (FN) Novec™ 4710 and fluoroketone (FK) Novec™ 5110 show higher dielectric strength than SF6. These gases can be mixed with a buffer gas such as CO2 and technical air to have suitable dielectric ...
C. Toigo   +3 more
semanticscholar   +1 more source

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