Insulation Structure Design for ±550-kV DC GIS Based on Multiobjective Optimization Algorithm

In high-voltage direct current gas-insulated switchgear (HVdc GIS), the problem of surface charge accumulation on insulators has garnered significant attention, limiting the development of dc GIS at high voltage levels. This study proposes an insulation structure optimization method based on a multi...

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Bibliographic Details
Published in:IEEE transactions on dielectrics and electrical insulation Vol. 32; no. 2; pp. 1064 - 1073
Main Authors: Zhang, Boya, Tao, Haifei, Li, Yixuan, Li, Xingwen, Nan, Zhenle, Luo, Wei, Zheng, Yao, Wang, Guoli
Format: Journal Article
Language:English
Published: New York IEEE 01.04.2025
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Charge density
Conical insulator
dc gas-insulated switchgear (GIS)
Design criteria
Design optimization
Direct current
Electric charge
Electric fields
Electrical insulation
Genetic algorithms
High voltages
High-voltage techniques
HVDC transmission
Insulators
Ions
IP networks
multiobjective optimization
Multiple objective analysis
Optimization
Response surface methodology
Shape
Sorting algorithms
Surface charge
Switchgear
ISSN:1070-9878, 1558-4135
Online Access:Get full text
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Summary:In high-voltage direct current gas-insulated switchgear (HVdc GIS), the problem of surface charge accumulation on insulators has garnered significant attention, limiting the development of dc GIS at high voltage levels. This study proposes an insulation structure optimization method based on a multiobjective optimization method to balance the tangential and normal electric fields on the insulator surface and mitigate local electric stress, achieving efficient and precise GIS insulation structure design. The optimization objectives include the tangential electric field and surface charge density. The study utilizes nondominated sorting genetic algorithm II (NSGA-II) and response surface methodology (RSM) to obtain the optimal structure for the conical insulator and shield of ±550-kV dc GIS. In addition, the study investigates the impact of gap distance on the surface charge and electric field distribution of the insulator. Ultimately, following insulation optimization design criteria, the study achieves the optimal structure and gap distance for ±550-kV GIS, providing crucial insights for the insulation design of HVdc GIS.
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ISSN:1070-9878
1558-4135
DOI:10.1109/TDEI.2025.3527915