HV Substation Diagnostics

Diagnostic engagement for a regional high-voltage substation in Colombia experiencing recurring surge arrester failures. The investigation combined a ferroresonance study with EMTP modelling of the substation to identify the source of temporary overvoltages.

1. 01

   Root-cause analysis of repeated surge arrester failures at the substation.

2. 02

   Ferroresonance study of the substation configuration and switching conditions.

3. 03

   EMTP modelling of the network to reproduce and characterise temporary overvoltages.

4. 04

   Mitigation recommendations to prevent recurrence and future outages.

Identified temporary overvoltage sources causing surge arrester failures, mitigating future outages.

• Insulation coordination All cases — Insulation coordination →

Systems & technologies

• Root Cause Analysis
• Ferroresonance Study
• EMTP Modelling
• Surge Arresters
• HV Substation