Fluke 6135A/PMU, Руководство оператора

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Software Operation
UUT Calibration Procedure
3
3-5
Calibration Compliance to IEEE C37.118.1a-2014
The Fluke 6135A PMU Calibration System was developed to provide PMU
manufacturers and third party calibration organizations with a system to demonstrate
compliance to
IEEE C37.118.1a-2014
(the Standard). The Calibration System is more
than 10 times more accurate than the PMU test limits in the Standard.
The Standard defines three types of test: Static performance, Dynamic performance, and
reporting Latency. The tests are all represented mathematically in the Standard. With one
dynamic test type exception and Latency tests, the PMU must meet test criteria for Total
Vector Error (TVE), Frequency Error (FE) and Rate of Change of Frequency Error
(RFE). The Figure 3-3 shows the errors of synchrophasor magnitude, phase angle, or time
that would individually contribute to 1 % TVE.
The three factors that affect TVE are: timing error, magnitude error, and phase angle
error. Table 3-1 and Figure 3-3 shows the accuracy required for each individual
contribution assuming the other two are zero.
The 6135A System Users Manual describes how all the output signals are calibrated for
magnitude and for alignment with the digital phase reference signal from the 6135A
System rear panel. The 6135A System specifications show that if the phase reference
signal can be perfectly aligned with the UTC 1 PPS, the magnitude phase angle and
timing error will be at least 100 times better than the PMU test limits. Figure 3-5 shows a
simplified block diagram of the Fluke 6135A PMU Calibration System.
Table 3-1. Accuracy Requirements
TVE Magnitude Angle Time (µs) (50/60 Hz)
PMU 1 % 1 % 0.573° 31.7 / 26.5
Fluke PMU Calibrator <0.1 % <0.1 % [1] <0.0573° 1.1
6135A at nominal frequency N/A 0.006 % [2] 0.0056° 0.3
Notes:
[1] - As seen by PMU with 10 % Interharmonic added.
[2] - Pure sine wave.
gtu176.emf
Figure 3-3. Accuracy Requirements (Illustration)