week 3 (chapter 3)

Question 1

the time of day when the demand for load is the highest?

Answer 1

peak load

Question 2

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?

Answer 2

cascading

Question 3

when is cascading most likely to happen?

Answer 3

during peak load times (early morning & evenings)

Question 4

what best explains why there is a need for a smarter power grid?

Answer 4

strain on the grid during peak load

Question 5

smart grid systems must be of the ____ ___ design

Answer 5

loop feed

Question 6

where does much of the renewable energy come from on distribution systems?

Answer 6

dispersed micro generation & distributed generation

Question 7

where does much of the renewable energy come from on transmission systems?

Answer 7

wind & solar thermal

Question 8

when power can flow both directions through circuits and equipment it is called?

Answer 8

bi-directional energy flow

Question 9

when distributed generation is adequate enough to handle load of a portion of the system (without dependence on the main grid), it is called?

Answer 9

islanding

Question 10

generators that increase operation only during peak load time are called?

Answer 10

peaker plants

Question 11

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?

Answer 11

Pumped storage (because the water is pumped back up during low demand, ready for next use)

Question 12

how long can molten salt from a parabolic trough solar generation system remain liquefied?

Answer 12

5-7 days

Question 13

how is energy released from storage batteries during peak load times?

Answer 13

in short bursts

Question 14

what method of stored energy uses caverns, mineshafts, and empty gas reservoirs?

Answer 14

compressed air

Question 15

ACCC (aluminum conductor composite core) is found on?

Answer 15

transmission systems

Question 16

what conductor on a transmission line can carry much more current at higher temperatures than the same sized ACSR conductor?

Answer 16

ACCC

Question 17

PMU’s are found where?

Answer 17

substations

Question 18

checks phase angle on voltage and current sine waves

Answer 18

phasor measurement units (PMU’s)

Question 19

triggers operation of capacitors and reactors via satelite to operate when there are disturbances on the phase angles

Answer 19

PMU’s

Question 20

philosophy that allows real time conditions surrounding conductors to be monitored

Answer 20

Dynamic line loading

Question 21

one advantage of dynamic line loading is ________ ______ and it allows operators to view?

Answer 21

thermal imaging/ conductor temp

Question 22

OPGW stands for?

Answer 22

optical ground wire

Question 23

where is OPGW found and what is it used for?

Answer 23

transmission/fiber optic data transfer and shield wire

Question 24

when larger portions of the circuit begin islanding it is called a?

Answer 24

micro grid

Question 25

smart grid discussion s tend to lean toward?

Answer 25

distribution

Question 26

what two objectives have to be met for smart switching equipment like cutouts, gang switches, and reclosers?

Answer 26

provide means for isolation and sectionalizing | change direction until the system returns to normal (bi directional )

Question 27

what kind of recloser can be operated by SCADA and can be set to either single phase or multi phase lock out?

Answer 27

smart

Question 28

what kind of recloser is operated via hydraulics?

Answer 28

legacy

Question 29

seen on single phase taps/can be retro fitted to a legacy cutout gate and indicates real time load?

Answer 29

smart cutout (tripsaver)

Question 30

what are the two types of capacitor banks?

Answer 30

fixed (legacy) and switched (smart)

Question 31

the intentional lowering of system voltage to help reduce demand on the system?

Answer 31

conservation voltage reduction

Question 32

why are distribution taps purposely lowered to the low end of the required service voltage range of 114-126?

Answer 32

to reduce system demand

Question 33

can be quickly installed on a conductor to provide data for troubleshooting and localized power quality disturbances

Answer 33

fault indicators & sensors

Question 34

home owner plays a more active role in power consumption

Answer 34

smart home

Question 35

when customers can monitor, manage, & control energy usage via home area display units or cell phones, this is called?

Answer 35

demand-side management

Question 36

smart meters and homes are subject to?

Answer 36

hacking

Question 37

relays price changes to the home area display unit, then talks to smart appliances?

Answer 37

smart meter

Question 38

can be plugged into appliances to see usage?

Answer 38

smart plug

Question 39

what is estimated to be the second biggest energy usage in the home?

Answer 39

lighting

Question 40

what is it called when lights are dimmed in place of using natural daylight?

Answer 40

daylight harvesting

Question 41

what voltage can power an electric vehicle?

Answer 41

120

Question 42

what type of vehicle cannot pull a horse trailer but will haul you and your fanny pack to starbucks for a 1000 calorie latte with just 120 volts of electricity?

Answer 42

all electric vehicle