real-time software-in-the-loop performance analysis of synchrophasor-and-active load-based power...
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RT-SIL Performance Analysis of Synchrophasor-and-Active Load-Based
Power System Damping ControllersG.M. Jonsdottir*, M.S. Almas*, M. Baudette*,
M.P. Palsson¶, L. Vanfretti*†
*KTH, Stockholm †Statnett SF, Norway¶Landsnet, Iceland
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Paper No:15PESGM2009
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Background
• The Icelandic power system is heavily loaded. – Idea: Active load modulation of industrial loads
(Aluminum smelters) in the systems using PMU measurements for enhancing small signal stability.
• Developed two active load control algorithms. • Tested
– Using the two area Kundur power system model (0.64Hz).
– In Real-Time Software-in-the-Loop (RT-SIL).
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Results3
55 60 65 70
3
3.5
4
4.5
5x 10
8
Time [s]
Po
we
r tr
an
sfe
red
fro
mA
rea
1 t
o A
rea
2 [
Wa
tts
]
Scenario 1: Small distrubance (5 % Change in Vref
of Generator 1)
Power Transfer Between Area 1 and Area 2
No Active Load ControlLoad Control Algorithm 1Load Control Algorithm 2
55 60 65 70 75
1.63
1.64
1.65
1.66
1.67
1.68
x 109
Time [s]
Scenario 1: Small distrubance (5 % Change in Vref
of Generator 1)
Load Control in Area 2
No Active Load ControlLoad Control Algorithm 1Load Control Algorithm 2
Acti
ve P
ower
Con
sum
tion
By D
ynam
ic L
oad
in A
2 (M
W)
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Conclusions/Recommendations• Both algorithms provide adequate damping
for inter-area oscillations.• The algorithm is flexible to accommodate
multiple oscillatory modes. • Future work
– Test algorithm in Real-Time Hardware-in-the-Loop.• Deploy load control algorithm in an external controller,
NI-cRIO (Compact Reconfigurable I/O Controller).• Utilize wide-area synchrophasor measurements to
perform load control.
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