turbine wreck from "Lightning Strike"

[byrdj]

Just wondering if any one heard of this and had some details on how it happen and the extent of damages

https://dominicantoday.com/dr/econo...minican-republic-to-a-dark-december-december/

Back in September a 300 MW power plant in Dominica wrecked. I learned about from another news report related to the quick installation of some combustion turbines to help while the wreck is being repaired.

this article implies over speed due to valves not responding. I wonder if surge disabled electronic governor.

 

[aussiejohn2]

G'day byrdj,

> this article implies over speed due to valves not responding.

I didn't see this in the linked article, perhaps I missed it, but...

> I wonder if surge disabled electronic governor.

This alone does not explain the failure. On a machine that size there will be mechanical overspeed protection.

JD.

 

[byrdj]

Just the photo showing a piece of the turbine "thrown" outside of the casing implies over speed to me.

Mechanical OS devices were being removed when I left the field decades ago.

 

[SlideRuleEra]

In the mid-1990's operator error motorized the generator on one of our units, 270 MW coal-fired. Believe the machine was on turning gear at the time; vibration from acceleration destroyed the turbine, pulled anchor bolts out of the T-G pedestal, caused a lube oil fire and a hydrogen explosion. Generator was fried in the fire. Damage resembled the photos in this thread. I participated in recovery, which took about 18 months. Maybe a lighting strike could start a similar chain of events.

http://www.SlideRuleEra.net