Replacement of 11kV Terminations on WTG Supply Due to Partial Discharge
During a recent routine inspection, our engineering team identified partial discharge activity at the 11kV cable terminations of the Wind Turbine Generator (WTG) supply system. To address the issue promptly, we replaced the affected components, restoring system reliability and reducing the risk of future electrical failures.
What Is Partial Discharge?
Partial discharge is a localized breakdown in electrical insulation caused by high-voltage stress. If left unchecked, it can lead to insulation failure and unexpected outages. Thankfully, scheduled testing allowed us to detect the issue early and take swift corrective action.
Inspection Highlights
Visual inspections revealed electrical tracking and discharge marks on the cable termination surfaces. Following this, our team conducted diagnostic testing using partial discharge detection equipment. The results confirmed elevated discharge levels, indicating insulation degradation. After a thorough root cause analysis, we determined that poor installation practices or environmental contamination during the original setup likely contributed to the problem.
Recommendations Moving Forward
To prevent similar issues, we recommend
Integrating partial discharge testing into routine maintenance.
Reviewing and improving installation practices to meet industry standards.
Ensuring clean and dry environments during installation to avoid contamination.
Conclusion
By identifying and resolving the partial discharge issue early, we’ve successfully restored the reliability of the WTG supply system. This outcome reinforces the importance of proactive maintenance, quality installation, and regular inspections in ensuring safe and efficient operations.
