Dynamic Characteristics of Transverse-Magnetic-Field Induced Arc for Plasma-Jet-Triggered Protective Gas Switch in Hybrid UHVDC System

A plasma jet-triggered gas switch (PJT-GS) has been developed as an important piece of equipment to operate in an ±800 kV ultra-high voltage direct current transmission system (UHV DC) to achieve grid system protection and control. The crucial factors that would affect its operational performance, s...

Full description

Saved in:
Bibliographic Details
Published inEnergies (Basel) Vol. 15; no. 16; p. 5871
Main Authors Wang, Wen, Li, Zhibing, Gao, Keli, Dong, Enyuan, Qu, Xuebin, Xu, Xiaodong
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.08.2022
Subjects
Analysis
arc dynamic characteristics
Design
Direct current
Dynamic characteristics
Electric power transmission
Electricity distribution
Electrodes
Equilibrium
Fluid flow
High voltage
Magnetic fields
magnetohydrodynamic-based (MHD)
Magnetohydrodynamics
Plasma
plasma jet-triggered gas switch (PJT-GS)
Plasma jets
Plasma physics
Rotation
UHVDC
Online AccessGet full text

Cover

More Information
Summary:A plasma jet-triggered gas switch (PJT-GS) has been developed as an important piece of equipment to operate in an ±800 kV ultra-high voltage direct current transmission system (UHV DC) to achieve grid system protection and control. The crucial factors that would affect its operational performance, such as the current level the PJT-GS could withstand and the gas gap distance between the two rotating electrodes, are comparatively studied in the present work by analysing the arc dynamic characteristics. The rotating electrode used in the PJT-GS is designed with a helical-slotted structure, and the arc can be rotated circularly driven by the produced transverse magnetic field (TMF) along the electrode edge. The objective of such research is to provide a thorough study of the arc dynamic behaviour during the current flowing process of the PJT-GS and also to characterise the physical mechanism that affects the arc rotation and the PJT-GS operation performance. The magnetohydrodynamic-based (MHD) approach is applied by establishing a 3D arc model. Following such a study, the variation of arc characteristics under different operation conditions could be thoroughly determined and it also could provide the guidance for the PJT-GS optimum design reasonably to support its corresponding engineering applications.
ISSN:1996-1073
1996-1073
DOI:10.3390/en15165871