Transient Nonlinear Electrothermal Adjoint Sensitivity Analysis for HVDC Cable Joints

TL;DR

This paper introduces an adjoint variable method for efficiently computing sensitivities in nonlinear transient electrothermal problems, specifically applied to high voltage DC cable joints, enabling better design optimization.

Contribution

It presents a novel adjoint sensitivity analysis approach for coupled nonlinear electrothermal problems, validated on a 320kV HVDC cable joint.

Findings

Validated sensitivities against direct method

Efficient computation for large parameter sets

Applicable to high voltage cable joint design

Abstract

Efficient computation of sensitivities is a promising approach for efficiently of designing and optimizing high voltage direct current cable joints. This paper presents the adjoint variable method for coupled nonlinear transient electrothermal problems as an efficient approach to compute sensitivities with respect to a large number of design parameters. The method is used to compute material sensitivities of a 320kV high voltage direct current cable joint specimen. The results are validated against sensitivities obtained via the direct sensitivity method.