Glossary
Introduction
A
A-3
ROCOF
Rate of Change of Frequency or “ROCOF” is the rate that the frequency changes.
Step Tests
See C37.118.1 for definitions of Response Time, Delay Time and Overshoot.
Synchrophasor
A Phasor measurement that has a time stamp is referred to as a “Synchrophasor”.
Testing Methods
Type of test to be performed on the UUT. Two types are Automated and
Interactive.
TVE
Total Vector Error or “TVE” is the measure of error between the reference
phasor of the signal and actual UUT measured phasor. The phasor can be a
voltage phasor or current phasor. To calculate TVE, this basic formula can be
used:
reference
reference
Measured
V
V
V
TVE
−
≡
Where:
•
reference
V
is the reference phasor
•
Measured
V
is the PMU measured phasor
UUT (Unit Under Test)
An abbreviated name for an instrument that is being tested or calibrated.
XML
Extensible markup language.
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