Performance Of Frequency Protection Functions; Overfrequency Protection; Underfrequency Protection; Supervised Rate Of Change Of Frequency Protection - GE MiCOM P40 Agile Technical Manual

P14D
5

PERFORMANCE OF FREQUENCY PROTECTION FUNCTIONS

5.1

OVERFREQUENCY PROTECTION

Pick-up
Drop-off
Operating timer
Operating time (Fs/Ff ratio less than 2)
Operating time (Fs/Ff ratio between 2 and 30)
Operating time (Fs/Ff ratio greater than 30)
Reset time
Reference conditions: Tested using step changed in frequency with Freq. Av Cycles setting = 0 and no intentional
time delay.
Fs = start frequency – frequency setting
Ff = frequency setting – end frequency
5.2

UNDERFREQUENCY PROTECTION

Pick-up
Drop-off
Operating timer
Operating time (Fs/Ff ratio less than 2)
Operating time (Fs/Ff ratio between 2 and 6)
Operating time (Fs/Ff ratio greater than 6)
Reset time
Reference conditions: Tested using step changed in frequency with Freq. Av Cycles setting = 0 and no intentional
time delay.
Fs = start frequency – frequency setting
Ff = frequency setting – end frequency
5.3

SUPERVISED RATE OF CHANGE OF FREQUENCY PROTECTION

Pick-up (f)
Pick-up (df/dt)
P14D-TM-EN-8
Accuracy
Setting +/- 10 mHz
Setting -20 mHz +/- 10 mHz
+/- 2% or 50 ms, whichever is greater
Operating and Reset time
<125 ms
<150 ms
<200 ms
<200 ms
Accuracy
Setting +/- 10 mHz
Setting + 20 mHz +/- 10 mHz
+/- 2% or 50 ms, whichever is greater
Operating and Reset time
<100 ms
<160 ms
<230 ms
<200 ms
Accuracy
Setting +/- 10 mHz
Setting +/- 3% or +/- 10 mHz/s, whichever is greater
Chapter 22 - Technical Specifications
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