Title: Performance of High Voltage Transformers in Moisture-Laden Environments: A Case Study of Nigeria's Niger Delta Region
Authors: Gabriel Ebiowei Moses, Miekoromo Peter Etale
Volume: 9
Issue: 10
Pages: 158-162
Publication Date: 2025/10/28
Abstract:
This study investigates the impact of moisture-rich environmental conditions on the operational performance of high voltage power transformers deployed in Nigeria's Niger Delta region. The area is characterized by high humidity, intense rainfall, and saline coastal winds, which accelerate moisture ingress into transformer insulation systems. A dataset of ten transformers was evaluated using some selected parameters such as ambient humidity, oil moisture content, and dielectric breakdown voltage. The findings revealed a direct correlation between ambient humidity and internal oil moisture levels, and a significant inverse relationship between moisture levels and breakdown voltage, indicating that increased moisture leads to rapid deterioration of dielectric strength and insulation reliability. The study confirms that moisture is a dominant degradation factor that significantly compromises transformer performance, leading to insulation failure, increased outage rates, and high maintenance costs in moisture-laden environments. Based on these findings, the research recommends continuous moisture monitoring, improved breather systems, oil dehydration practices, and condition-based maintenance strategies as effective mitigation measures. The study concludes that environment-specific maintenance policies and predictive diagnostic technologies are critical to enhancing transformer lifespan and ensuring grid reliability in coastal regions like the Niger Delta.