Kyrgyzstan says Toktogul trip on Aug 14 did not directly cause Almaty blackout
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Two hydro generators at Kyrgyzstan's Toktogul hydropower plant tripped at 15:37 Bishkek time on Aug 14, triggering an initial disturbance in the Central Asian unified power system. Kyrgyzstan's Energy Ministry says frequency was restored to 50 Hz within 18 minutes and its grid supplied 250 MW to neighboring states, while disputing KEGOC's link between the trip and the later Almaty outage. In Almaty and Almaty region, three 500 kV KEGOC lines tripped at 14:38 local time, disconnecting 300 MW of load.
Key Facts
- Almaty and Almaty region lost 300 MW of load on Aug 14 after three 500 kV lines owned by KEGOC tripped.
- Kyrgyzstan's Energy Ministry confirmed two hydro generators at the Toktogul plant tripped at 15:37 on Aug 14.
- The ministry reported frequency in the unified Central Asian grid was restored to 50 Hz by 15:55.
- Kyrgyzstan supplied 250 MW to neighboring grids during the stabilization, according to the ministry.
- The ministry said the Almaty energy ring disconnected after regional frequency had already returned to the nominal value.
Kyrgyz Response
Kyrgyzstan's Energy Ministry confirmed that two hydro generators at the Toktogul plant briefly tripped at 15:37 on Aug 14. The ministry said the Kyrgyz power system separated from the unified Central Asian grid and restored frequency to 50 Hz by 15:55. Kyrgyzstan supplied 250 MW to neighboring grids during the stabilization period. The ministry stated that the initial Toktogul trip cannot be equated with a direct cause of outages in other countries. It said the Almaty energy node disconnected only after the regional frequency had already recovered to the nominal value.
Kazakhstan Outage Sequence
Kazakhstan's Energy Ministry initially reported a sharp change in power flow from the Central Asian energy system on Aug 14. At 14:38 Kazakh time, the Almaty energy node lost three 500 kV transmission lines owned by KEGOC. Alatau Zharyk Company reported the disconnected load amounted to 300 MW in parts of Almaty and Almaty region. KEGOC attributed the disturbance to the tripping of two hydro generators at the Toktogul plant.
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Kyrgyzstan says Toktogul trip on Aug 14 did not directly cause Almaty blackout
