IEEE: Lack of Rain a Leading Cause of Indian Grid Collapse

Joshua Smith juicewvu at
Fri Aug 3 16:39:27 CDT 2012

This is an interesting article. As are your comments and links. It would be interesting for someone who is more of an EE type than myself (just a "lowly" bs cs) compare this Indian outage with the northeast outage experienced in the US in the summer of 03. 


Josh Smith

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On Aug 3, 2012, at 4:49 PM, Bob Bruhns <bbruhns at> wrote:

> I think what the article was suggesting is that a shortage of rainfall has increased the demand for pumped water, and a lot of water pumping is done at night because regulations on power consumption are relaxed then, and that would explain why the system overloaded at such a late hour.
> From what the unnamed senior electrical official said, there was West-North power flow, but no East-North power flow.  Maybe there should have been more East-North flow?  Or maybe that's impractical?
> India evidently has several subgrids running unsynchronized (at very slightly different frequencies), as we do in the US.  I see slightly different "50 Hz"  frequencies displayed on the various grids - see the External Links at the bottom of this article:
> From the size of the power blackout, I think they must have been linking their subgrids.  They would have to synchronize them do that, and maybe that makes syncing to a second subgrid impractical or time-consuming?
>   Bob, WA3WDR
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