IEEE Power & Energy Magazine - March/April 2020 - 66

The LTB provides an integrated platform as a
virtual power grid to validate and verify closed-loop
control technologies.
40 aggregated wind farms totaling 13.5 GW. The parameters of the studied system were calibrated using the FNET/
GridEye data with the main oscillation modes preserved.
A three-phase fault on a generator bus in the Los Angeles
area with a duration of 10 cycles will trigger two oscillation
modes, one with a frequency f = 0.6540 Hz and a damping

ratio D = 0.899% and the other one with f = 0.8121 Hz and
D = 4.443%.
The frequency deviations from the nominal value are visualized on the geographic map to observe the control effects.
Using the LTB-Web visualization tool, the frequency oscillation can be animated continuously. Screenshots from the

Supervisory Modal-Based
Control Allocation

WADC

Power System

PMUs

Controller

Actuators

figure 5. A block diagram of the WADC for closed-loop verification.

-0.11 Hz

10.73 s

11.45 s

12.24 s
(a)

13.01 s

13.88 s
-0.11 Hz

10.73 s

11.45 s

12.24 s
(b)

13.01 s

0.11 Hz

0.11 Hz

13.88 s

figure 6. A visual comparison of the frequency deviations for the system (a) without WADC and (b) with full WADC allocation.
66	

ieee power & energy magazine	

march/april 2020



IEEE Power & Energy Magazine - March/April 2020

Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - March/April 2020

Contents
IEEE Power & Energy Magazine - March/April 2020 - Contents
IEEE Power & Energy Magazine - March/April 2020 - Cover2
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IEEE Power & Energy Magazine - March/April 2020 - Cover3
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