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© 2002 ABB Automation Technology Products AB - 1 - 1/9/2014 Insert image here Power System Damping in Iceland based on phasor measurements Sethuraman Ganesan.

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Presentation on theme: "© 2002 ABB Automation Technology Products AB - 1 - 1/9/2014 Insert image here Power System Damping in Iceland based on phasor measurements Sethuraman Ganesan."— Presentation transcript:

1 © 2002 ABB Automation Technology Products AB - 1 - 1/9/2014 Insert image here Power System Damping in Iceland based on phasor measurements Sethuraman Ganesan ABB

2 © 2002 ABB Automation Technology Products AB - 2 - Daniel Karlsson, 2002-09-24 Presentation Outline Introduction to the Icelandic Power System Damping problems PMU installations and test results Power System Model Setup And verification Local PSS Based on shaft speed Wide-Area PSS Based on frequency difference measured by PMUs Comparison of Results Conclusions Future Work

3 © 2002 ABB Automation Technology Products AB - 3 - Daniel Karlsson, 2002-09-24 Hryggstekkur Laxá 28 MW Sog 89 MW Hamranes Blanda 150 MW Brennimelur Korpa Geitháls Hrútatunga Varmahlíð Rangárvellir Prestbakki Hólar Mjólká Geiradalur Glerárskógar Sigalda 150 MW Búrfell 270 MW Vatnshamrar Teigarhorn Hydro power station Substation Geothermal power station Power intensive industry Vatnsfell 90 MW Transmission lines 220 kV 132 kV 66 kV Bjarnarflag 3 MW Laxárvatn Krafla 60 MW Sultartangi 120 MW Hrauneyjafoss 210 MW 150 km Generator Inertia Diagram

4 © 2002 ABB Automation Technology Products AB - 4 - Daniel Karlsson, 2002-09-24 Hryggstekkur Laxá 28 MW Sog 89 MW Hamranes Blanda 150 MW Brennimelur Korpa Geitháls Hrútatunga Varmahlíð Rangárvellir Prestbakki Hólar Mjólká Geiradalur Glerárskógar Sigalda 150 MW Búrfell 270 MW Vatnshamrar Teigarhorn Hydro power station Substation Geothermal power station Power intensive industry Vatnsfell 90 MW Transmission lines 220 kV 132 kV 66 kV Bjarnarflag 3 MW Laxárvatn Krafla 60 MW Sultartangi 120 MW Hrauneyjafoss 210 MW 150 km Icelandic Power System E C RES 521: PMU E C E C Blanda Power St. 3x50 MW Sigalda Power St. 150 MW Krafla Power St. 2x30 MW

5 © 2002 ABB Automation Technology Products AB - 5 - Daniel Karlsson, 2002-09-24 Hryggstekkur Laxá 28 MW Sog 89 MW Hamranes Blanda 150 MW Brennimelur Korpa Geitháls Hrútatunga Varmahlíð Rangárvellir Prestbakki Hólar Mjólká Geiradalur Glerárskógar Sigalda 150 MW Búrfell 270 MW Vatnshamrar Teigarhorn Hydro power station Substation Geothermal power station Power intensive industry Vatnsfell 90 MW Transmission lines 220 kV 132 kV 66 kV Bjarnarflag 3 MW Laxárvatn Sultartangi 120 MW Hrauneyjafoss 210 MW 150 km Reclosing of the Ring, after a planned outage Test Recordings in Iceland, February 27, 2002 Krafla 60 MW

6 © 2002 ABB Automation Technology Products AB - 6 - Daniel Karlsson, 2002-09-24 Voltage Phase-Angle Blanda-Sigalda 132 kV 0 1 2 3 4 5 Time [s] 12 11 10 9 8 Angle [degrees]

7 © 2002 ABB Automation Technology Products AB - 7 - Daniel Karlsson, 2002-09-24 PMU Output Signals Phasors V, I Line P and Q Feedback synchronizing / t damping = B – S Line P / t 012345 012345 012345 rad/s 0 0.2 0.4 MW 90 95 degrees 11 10.5 10 9.5 9 Closing of Ring, February 27, 2002

8 © 2002 ABB Automation Technology Products AB - 8 - Daniel Karlsson, 2002-09-24 Hryggstekkur Laxá 28 MW Sog 89 MW Hamranes Blanda 150 MW Brennimelur Korpa Geitháls Hrútatunga Varmahlíð Rangárvellir Prestbakki Hólar Mjólká Geiradalur Glerárskógar Sigalda 150 MW Búrfell 270 MW Vatnshamrar Teigarhorn Hydro power station Substation Geothermal power station Power intensive industry Vatnsfell 90 MW Transmission lines 220 kV 132 kV 66 kV Bjarnarflag 3 MW Laxárvatn Sultartangi 120 MW Hrauneyjafoss 210 MW 150 km Fault Recordings in Iceland, February 16, 2001 Forced Outage: Line Fault & Trip Krafla 60 MW

9 © 2002 ABB Automation Technology Products AB - 9 - Daniel Karlsson, 2002-09-24 Power Oscillations, February 16, 2001 Line just east of Krafla tripped after fault Recorded and simulated Krafla MW output 700 s of undamped oscillations Recording Simulation 20 10 30 0 40 MW 02468[s]10 02468 [s] MW 40 20 0 Recording 020406080100 Time [s] MW 0 10 20 30 40

10 © 2002 ABB Automation Technology Products AB - 10 - Daniel Karlsson, 2002-09-24 Test Cases Fault Location Fault Location: No Fault (0) Southwest (1) West (2) Between Blanda and Krafla (4) East of Krafla (5) Sigalda Blanda Krafla Mode shape of interarea mode (5)

11 © 2002 ABB Automation Technology Products AB - 11 - Daniel Karlsson, 2002-09-24 Characteristic of Speed Input PSS at Krafla 101505 rad/s 20 0 40 60 80 100 120 140 degrees

12 © 2002 ABB Automation Technology Products AB - 12 - Daniel Karlsson, 2002-09-24 Root Locus for Local and Wide-area PSS 0-0.6-0.4-0.2 Real [1/s] Imag [rad/s] 3.3 3.4 3.5 Real [1/s] -1.5-0.5 Imag [rad/s] 8.0 8.5 9.0 9.5 Imag [rad/s] 15 10 5 0 Real [1/s] 0 -4 -2 Gain from 0 to 20 * gain local = 18  gain wide-area =12

13 © 2002 ABB Automation Technology Products AB - 13 - Daniel Karlsson, 2002-09-24 Simulation of the February 16 Disturbance Speed-input Local PSS (dashed) Wide-area PSS (solid) P on line west of Krafla Voltage at Krafla PSS output Saturation….. 0246810 02468 02468 80 60 40 20 0 -20 MW 140 kV 130 120 110 p.u. 0.05 0.0 -0.05

14 © 2002 ABB Automation Technology Products AB - 14 - Daniel Karlsson, 2002-09-24 Conclusions Wide-area PSS and Local PSS give basically similar results in this study Wide-area PSS need, however, a lower gain to to provide the same interarea mode damping This indicates that the mode observability of the frequency difference signal is higher than that of shaft speed. Local PSS provides better damping of local modes.

15 © 2002 ABB Automation Technology Products AB - 15 - Daniel Karlsson, 2002-09-24 Future Work I The question arise: What about a combined PSS, combining the superior local mode damping of the local PSS with the higher interarea mode observability of the wide-area PSS.

16 © 2002 ABB Automation Technology Products AB - 16 - Daniel Karlsson, 2002-09-24 Braking Resistor On-off Control that Complements PSS 3 MW at Blanda f for on-off Frequency PSS Output Blanda f Blanda P Braking Resistor in Blanda Krafla –, Blanda - -, Sigalda.. 012345678910 012345678910 012345678910 012345678910 0 1 2 3 MW Hz p.u. 0.5 0.0 -0.5 0.05 -0.05 0.0 50.2 50.0 49.8 Future Work II

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