Monday, February
5, 2001, Chandigarh, India
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Grid failure THE
article “A close look at power grid collapse” by G.K. Pandey (The Tribune, Jan. 22) gives the impression that the event is sought to be used by the “power sector privatisation” lobby as yet another whip to lash the SEBs with. This article, and many others that have appeared in the media since the day of the grid collapse, have been poor in technical content. All these articles and reports start pleading for power sector reforms in about the middle of the report. One gets the feeling that it is an attempt by the “power sector privatisation” lobby to bury its failures, like the high cost of energy from Enron, under the mud of an event like grid collapse that has relation with reforms. A grid collapse is essentially a feature of power demand, supply and grid discipline. Whenever the demand for electricity exceeds the supply, the grid frequency falls. Conversely, the grid frequency rises when supply exceeds the demand. The load despatch centre asks a certain load centre to cut-off in the first case a particular generating station to back-off generation in the second. Enthusiastic utilities, driven by productivity linked bonuses, are known to ignore such instructions. Such a situation can lead to a power station tripping on under frequency or over frequency and thereby cause an avalanche of tripping of power houses leading to a grid collapse.
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