Permissable loss of load for contingency
Permissable loss of load for contingency
(OP)
What is the the typical allowable loss of load (in MW) for a bus fault or breaker failure? Any established standards be it NERC or IEC?
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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Permissable loss of load for contingency
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RE: Permissable loss of load for contingency
RE: Permissable loss of load for contingency
RE: Permissable loss of load for contingency
RE: Permissable loss of load for contingency
This I understand well, but because operating experience across the globe has shown bus faults to be some of the lowest occurring contingencies- and breaker failure rare- the idea is that these could be classified as an extreme contingency rather than a normal contingency.
RE: Permissable loss of load for contingency
In the past, some operators assumed they could overload a facility by any amount as long as operator action could fix it within 30 minutes. The 30 minute timeframe has drastically changed with the recent versions of NERC standards. For all "credible" contingencies, the system must be operated such that all post-contingency flows will stay under the applicable equipment ratings. Many utilities have begun using 15-30 minute emergency ratings to allow higher short term loading while operators take actions. Possible cascading is screened for by assuming equipment loaded beyond the emergency rating will trip out.
If a condition occurs outside of a "credible" contingency, TOP-007-0 R2 applies:
CODE
RE: Permissable loss of load for contingency
RE: Permissable loss of load for contingency
RE: Permissable loss of load for contingency