Electric Field Improvement for High-Voltage Bushings

Area of Science:

• Electrical Engineering
• Materials Science
• Electromagnetics

Background:

• Resin-impregnated paper (RIP) bushings are crucial for Extra High Voltage (EHV) and Ultra High Voltage (UHV) electricity transmission.
• Current design criteria for RIP bushing structures, condenser layers, and stress relief devices require further understanding.
• Optimizing electric field distribution is vital for the reliability and performance of EHV/UHV bushings.

Purpose of the Study:

• To propose a novel hybrid electric field optimization technique for RIP bushings.
• To integrate analytical and numerical methods for comprehensive electric field analysis.
• To address the limitations in understanding the design criteria of EHV/UHV RIP bushing components.

Main Methods:

• Employed the Charge Simulation Method (CSM) to establish overall equipotential surfaces.
• Utilized Finite Element Analysis (FEA) to investigate localized electric field enhancement.
• Incorporated multi-physics coupled field analysis for a holistic approach.
• Performed a case study on an actual Ultra High Voltage (UHV) bushing.

Main Results:

• The hybrid method provides a more accurate electric field analysis compared to traditional techniques.
• Localized field enhancement effects were effectively studied using FEA within CSM-generated equipotential surfaces.
• The integrated approach demonstrated significant benefits for UHV bushing design optimization.

Conclusions:

• The proposed hybrid electric field optimization technique offers a superior approach for designing RIP bushings.
• This method enhances the understanding and prediction of electric field behavior in EHV/UHV systems.
• The findings contribute to the development of more reliable and efficient high-voltage electrical equipment.