Uzbekistan grid fault cuts power to parts of Kazakhstan

September 25, 2026 at 09:40 AM1 min

This digest was compiled by AI from multiple sources — links to the originals are below.

A fault in Uzbekistan's power grid at 05:02 on September 25 cut electricity to parts of Kazakhstan. The incident triggered automatic load shedding of 962 MW in Kazakhstan's power system. Power was restored by 05:43, and restrictions were lifted.

Key Facts

At 05:02 on September 25, a generation loss of 1,516 MW occurred in Uzbekistan's power system.
The resulting power surge caused the automatic separation of the North-South transit in Kazakhstan.
Consumer restrictions in Kazakhstan's power system reached 962 MW.
Emergency control systems operated in normal mode, preventing a wider blackout.
Parallel operation of Kazakhstan's southern zone with the Central Asian power system was restored by 05:43.

Grid Fault

At 05:02 on September 25, a sudden disconnection of generating capacity totaling 1,516 MW occurred in Uzbekistan's power system. This caused a sharp power surge from the Central Asian power system. The North-South transit in Kazakhstan automatically separated as a result. Emergency control systems operated in normal mode, preventing a larger outage.

Consumer Impact

The volume of restrictions for consumers in Kazakhstan's power system reached 962 MW. Automatic load shedding was activated when frequency dropped after the fault. By 05:43, parallel operation of the Southern zone of Kazakhstan's Unified Power System with the Central Asian power system was fully restored. Regional grid companies were then instructed to lift restrictions and reconnect consumers.

System Restoration

KEGOC reported that Kazakhstan's Unified Power System is now operating in normal mode. A similar incident occurred on August 14, when a massive power outage affected several regions of Kazakhstan. That outage was caused by the disconnection of two hydro generators at the Toktogul HPP in Kyrgyzstan, leading to overload of the North-East-South transit and separation of the Southern zone.