week 3 (chapter 3) Flashcards
the time of day when the demand for load is the highest?
peak load
when an outage on a circuit causes outages on interconnected circuits because the interconnected circuits are not able to support the load from the original outage…….this is called?
cascading
when is cascading most likely to happen?
during peak load times (early morning & evenings)
what best explains why there is a need for a smarter power grid?
strain on the grid during peak load
smart grid systems must be of the ____ ___ design
loop feed
where does much of the renewable energy come from on distribution systems?
dispersed micro generation & distributed generation
where does much of the renewable energy come from on transmission systems?
wind & solar thermal
when power can flow both directions through circuits and equipment it is called?
bi-directional energy flow
when distributed generation is adequate enough to handle load of a portion of the system (without dependence on the main grid), it is called?
islanding
generators that increase operation only during peak load time are called?
peaker plants
what type of hydro electric generation involves an upper reservoir that during peak load times will flow into a penstock to feed a generator and boost system voltage?
Pumped storage (because the water is pumped back up during low demand, ready for next use)
how long can molten salt from a parabolic trough solar generation system remain liquefied?
5-7 days
how is energy released from storage batteries during peak load times?
in short bursts
what method of stored energy uses caverns, mineshafts, and empty gas reservoirs?
compressed air
ACCC (aluminum conductor composite core) is found on?
transmission systems
what conductor on a transmission line can carry much more current at higher temperatures than the same sized ACSR conductor?
ACCC