Update DC line model

[pelesh]

Issue type

Feature Request

Issue applies to:

• PFLOW
• OPFLOW
• TCOPFLOW
• SCOPFLOW
• SOPFLOW
• CMake and build system
• Spack
• Visualization
• Documentation
• Other

Summary

Update DC line model per earlier pull request.

Description how to reproduce the issue

N/A

ExaGO version

develop

System and environment details

All supported architectures

Additional information

No response

Proposed solution

No response