NERC Prep
How much load reduction to 6-10% Load reduction = 1HZ Frequency change same direction
change frequency
5% of online generation
Largest Load block to pick up
during sys resto
Ratio of Voltage change to load 5% change in Voltage=3% change in load (distribution only)
change
Power Losses on Line I squared * R
300 MW uncontrolled loss of load
100MW Firm load shed
50,000 customers out of power greater than 1 hr
3% Voltage reduction
DOE Reporting Conditions Public appeals to reduce load
vandalism, sabotage
60 minutes for initial report
Time requirements for DOT
reporting 48 hrs for followup report
24 hrs normal 72 hrs IROL violoation for intial
NERC reporting time
requirements 60 Days final report
How often must a blackstart gen every 5 years
be tested
How often must a sys resto plan every 1 year
be reviewed/updated
every 3 years (really not sure about this one)
How often must sys resto plan be
tested
Who is responsible for creating a TOP
sys resto plan
how often is ACE calculated every 6 seconds (have seen 4)
1% change in frequency = 2% change in load (approx. depending
ratio of frequency change to load
change on reactive nature of load)
transmission voltages 765, 500, 345,230,138, 115 kv
distribution voltages 240, 120, 4, 13, 26, 69 kv
30 minutes
how long does a gen have to
restart after shutdown without full
restart process
allowable voltage variation during +/- 10%
sys restoration
+/- 5%
allowable voltage variation during
normal condtions
, NERC Prep
59.75 hz - 61 hz (also saw 59.5 hz)
allowable frequency variation
during system resto
power transfer ((V1V2)sin power angle)/Xsubl
100 kV or higher
What voltage is considered part
of the BES
32 hrs
Number of required emergency
ops training hours for sys
operators
Formula for redispatching MW relief required/(GDF GenA-GDF GenB)=change in GenB
output
generation (only for balancing)
Minimum Torque angle for power 10 degrees
to start flowing
1% of estimated peak demand for next year or 1% of estimated
Minimum Frequncy Bias setting
for BA peak generation for next year if not load serving
CPS1 requirement greater than or equal to 100% for rolling 12 month period
CPS 2 requirement greater than or equal to 90% for month (10 minute intervals)
What level of disturbance is 80% of MSST
reportable for DCS
DCS requirement to return to pre 15 minutes
disturbance condition
90 minutes after the end of disturbance period
DCS requirement for recovery
period
1) +/- .02 hz to Fs
2) 20% of B added to NIs if unable to perform frequency
time error correction adjustment
3% of transaction
amount of interchange
transaction intermediate BAs
receive for losses
how long does BA have to submit 60 minutes
emergency RFI
60 minutes
length of time deficient BA can
use assistance from reserve
sharing group before must sumbit
RFI
1 minute
time Interchange Authority has to
distribute arranged interchange
How much load reduction to 6-10% Load reduction = 1HZ Frequency change same direction
change frequency
5% of online generation
Largest Load block to pick up
during sys resto
Ratio of Voltage change to load 5% change in Voltage=3% change in load (distribution only)
change
Power Losses on Line I squared * R
300 MW uncontrolled loss of load
100MW Firm load shed
50,000 customers out of power greater than 1 hr
3% Voltage reduction
DOE Reporting Conditions Public appeals to reduce load
vandalism, sabotage
60 minutes for initial report
Time requirements for DOT
reporting 48 hrs for followup report
24 hrs normal 72 hrs IROL violoation for intial
NERC reporting time
requirements 60 Days final report
How often must a blackstart gen every 5 years
be tested
How often must a sys resto plan every 1 year
be reviewed/updated
every 3 years (really not sure about this one)
How often must sys resto plan be
tested
Who is responsible for creating a TOP
sys resto plan
how often is ACE calculated every 6 seconds (have seen 4)
1% change in frequency = 2% change in load (approx. depending
ratio of frequency change to load
change on reactive nature of load)
transmission voltages 765, 500, 345,230,138, 115 kv
distribution voltages 240, 120, 4, 13, 26, 69 kv
30 minutes
how long does a gen have to
restart after shutdown without full
restart process
allowable voltage variation during +/- 10%
sys restoration
+/- 5%
allowable voltage variation during
normal condtions
, NERC Prep
59.75 hz - 61 hz (also saw 59.5 hz)
allowable frequency variation
during system resto
power transfer ((V1V2)sin power angle)/Xsubl
100 kV or higher
What voltage is considered part
of the BES
32 hrs
Number of required emergency
ops training hours for sys
operators
Formula for redispatching MW relief required/(GDF GenA-GDF GenB)=change in GenB
output
generation (only for balancing)
Minimum Torque angle for power 10 degrees
to start flowing
1% of estimated peak demand for next year or 1% of estimated
Minimum Frequncy Bias setting
for BA peak generation for next year if not load serving
CPS1 requirement greater than or equal to 100% for rolling 12 month period
CPS 2 requirement greater than or equal to 90% for month (10 minute intervals)
What level of disturbance is 80% of MSST
reportable for DCS
DCS requirement to return to pre 15 minutes
disturbance condition
90 minutes after the end of disturbance period
DCS requirement for recovery
period
1) +/- .02 hz to Fs
2) 20% of B added to NIs if unable to perform frequency
time error correction adjustment
3% of transaction
amount of interchange
transaction intermediate BAs
receive for losses
how long does BA have to submit 60 minutes
emergency RFI
60 minutes
length of time deficient BA can
use assistance from reserve
sharing group before must sumbit
RFI
1 minute
time Interchange Authority has to
distribute arranged interchange
