Sakis Meliopoulos (Georgia Tech) - ecedha
Sakis Meliopoulos (Georgia Tech) - ecedha Sakis Meliopoulos (Georgia Tech) - ecedha
Arun Phadke’s Arun Phasor Phadke’s Measurement PMS System Block Block Diagram Diagram Published Published by by Arun Arun Phadke Phadke Vintage 1990-92 several units were Several sold Units to AEP, Were NYPA, Sold to others Vintage 1990-91 AEP, NYPA, others Time Time Accuracy Accuracy Was Was Never Never Measured Measured or or Reported. Reported. Multiplexing Multiplexing and and Design Design Suggest Suggest Very Very High High Timing Timing Error Error Estimated Estimated Time Time Precision: Precision: 100 100 us, us, 2 degrees degrees at at 60 60 Hz Hz NSF/ECEDHA Education Workshop Georgia Tech GLC, Atlanta, Georgia, July 9-12, 2011 CHARACTERISTICS • Analog Filter with Cutoff Frequency of 360Hz • Sample & Hold A/D Technology with Analog Multiplexing • 12 bit S&H A/D 720 s/s 1.24
Macrodyne 1620 PMU Released to Market January 1992 Jay Murphy (Macrodyne) Was First to Introduce Term PMU: Phasor Measurement Unit Analog Inputs V : 300V I : 2V Input Protection & Isolation Section Input Protection & Isolation Section A/D Converter (Σ∆ Modulation) Optical Isolation A/D Converter (Σ∆ Modulation) NSF/ECEDHA Education Workshop Georgia Tech GLC, Atlanta, Georgia, July 9-12, 2011 Optical Isolation Sampling Clock Optical Isolation Optical Isolation Master Workstation Digitized Data 2880 s/s Digitized Data 2880 s/s GPS Receiver PLL µP GPS Antenna 1PPS RS232 Data Concentrator (PC) IRIGB Memory Display & Keyboard CHARACTERISTICS • Individually GPS Sync’d Channels • Common Mode Rejection Filter with Optical Isolation • 16 bit A/D Σ∆ Modulation Time Accuracy 1 µs µs 0.02 0.02 Degrees at at 60 60 Hz Hz 1.25
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Macrodyne 1620 PMU<br />
Released to Market January 1992<br />
Jay Murphy (Macrodyne) Was First to Introduce<br />
Term PMU: Phasor Measurement Unit<br />
Analog<br />
Inputs<br />
V : 300V<br />
I : 2V<br />
Input Protection &<br />
Isolation Section<br />
Input Protection &<br />
Isolation Section<br />
A/D Converter<br />
(Σ∆ Modulation)<br />
Optical<br />
Isolation<br />
A/D Converter<br />
(Σ∆ Modulation)<br />
NSF/ECEDHA Education Workshop<br />
<strong>Georgia</strong> <strong>Tech</strong> GLC, Atlanta, <strong>Georgia</strong>, July 9-12, 2011<br />
Optical<br />
Isolation<br />
Sampling Clock<br />
Optical<br />
Isolation<br />
Optical<br />
Isolation<br />
Master<br />
Workstation<br />
Digitized<br />
Data<br />
2880 s/s<br />
Digitized<br />
Data<br />
2880 s/s<br />
GPS<br />
Receiver<br />
PLL<br />
µP<br />
GPS<br />
Antenna<br />
1PPS<br />
RS232<br />
Data<br />
Concentrator<br />
(PC)<br />
IRIGB<br />
Memory<br />
Display<br />
&<br />
Keyboard<br />
CHARACTERISTICS<br />
• Individually GPS<br />
Sync’d Channels<br />
• Common Mode<br />
Rejection Filter with<br />
Optical Isolation<br />
• 16 bit A/D Σ∆<br />
Modulation<br />
Time Accuracy 1 µs µs<br />
0.02 0.02 Degrees at at 60 60 Hz Hz<br />
1.25
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