Power distribution feeder response to the asymmetric saturation of substation transformers caused by significant high-side DC currents.

High-altitude electromagnetic-pulse and geomagnetic disturbances can lead to asymmetric saturation of utility transformer cores by causing significant DC current to flow through the transformer windings. Transformer secondary voltage and current waveforms are distorted by core saturation and this distortion can be amplified at points on power distribution feeders where circuit topologies create series or parallel resonances. The performance of distribution feeders during asymmetric core saturation is explored in this work using harmonic powerflow simulation. A harmonic voltage source model is developed to represent steady-state transformer secondary terminal response during DC current flow in the primary windings. The model performance is compared to field test measurement data and then used to simulate the energization of realistic electric power distribution feeder models. The response of the feeder models is compared to industry standards of power quality.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Doctoral

Grantor

Baylor University.

Year dc:date.issued

2023

Author dc:creator

• Weldy, Christopher D., 1984-

Advisor dc:contributor.advisor

• Grady, William Mack.

• Power systems.
• E3.0.
• Geomagnetic disturbance (GMD)
• Harmonics.
• Transformer.
• Saturation.

Statement dc:rights

• Baylor University works are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. Contact libraryquestions@baylor.edu for inquiries about permission.

Language dc:language.iso

en

Handle dc:identifier.uri

https://hdl.handle.net/2104/12523

OAI identifier oai:identifier

oai:baylor-ir.tdl.org:2104/12523