Sumatra Power Outage Linked to Weather-Induced Transmission Line Failure

The recent widespread power outage across Sumatra, affecting multiple provinces including Jambi, West Sumatra, Riau, North Sumatra, and Aceh, has been attributed by PT PLN (Persero) Director-General Darmawan Prasodjo to a disruption in the extra-high voltage transmission line. Initial indications point to severe weather as the likely culprit behind the failure of the 275 kilovolt (kV) Muara Bungo–Sungai Rumbai transmission line in Jambi on Friday night.

This incident serves as a stark reminder of the fragility of Sumatra's interconnected power system. The failure of a single critical transmission line can indeed trigger a cascade of failures, leading to a domino effect that plunges vast areas into darkness. PLN has confirmed that the disruption began at 18:44 WIB on Friday, May 22, 2026, and has since been working diligently on a phased system recovery.

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This is an initial indication that a 275 kV transmission line segment between Muara Bungo and Sungai Rumbai in Jambi, initially suspected due to weather disturbances, experienced a failure, causing it to go offline from the Sumatran electricity system.

The situation highlights the vulnerability of our energy infrastructure to environmental factors. While PLN is committed to restoring power, the recurrence of such widespread outages raises concerns about the robustness and resilience of the existing transmission network. The company's swift reporting to the Ministry of Energy and Mineral Resources and ongoing recovery efforts are noted, but the underlying causes and preventative measures against weather-related disruptions will be a key focus moving forward.

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And we convey that this condition turned out to have a domino effect. Thus, a power system disruption occurred from Jambi, Riau, North Sumatra to Aceh.