10-12-2012, 01:07 PM
Special Edition on Recent Advances in Power System Control
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Power system stability analysis and control are among the most significant issues being dealt with by
the sophisticated power systems of today. The ability of a power system to maintain stability and to
provide high quality power supply depends to a large extent on the controls available within the
system. Analysis and design of power system controls are indeed important and essential for modern
power systems. This special edition on recent advances in power system control is dedicated to the
state-of-the-art of research achievements, findings and results in addressing today’s needs.
Out of 26 submissions from 11 countries across America, Asia and Europe, this special edition selects
15 representative nations addressing a number of burning technical issues owing to limited space. All
of the submissions were peer reviewed according to the journal guidelines. The papers published in
the special edition describe the latest research findings and ideas in the areas of power system control.
The papers cover a wide range of interesting issues in power system control, which can be broadly
divided into five subjects.
The first subject is stabilization and control. There are four papers addressing related issues on this
subject. Mei et. al. discuss robust design, in the sense of L2-gain, of nonlinear disturbance attenuation
control for STATCOM. A novel recursive approach is applied to construct the energy storage function
of power systems such that the solution of the control problem is acquired, which avoids the difficulty
from solving the dissipative inequality. Jung et. al. propose decentralized control for multimachine
power systems with nonlinear interconnections and disturbances. The authors first employ a direct
feedback linearization compensator to cancel most of the nonlinearities in the system model, and then
apply backstepping to deal with the interconnection terms and to reduce the effects of a disturbance
that does not satisfy the matching condition. The proposed decentralized scheme is applied to a threemachine
example power system to demonstrate its effectiveness. Psillakis and Alexandridis present a
new excitation control for multimachine power systems. Their paper consists of two parts: (i)
decentralized nonlinear adaptive control design and stability analysis, and (ii) robustness and
disturbance attenuation analysis. The applications of the proposed control scheme to an example
system, a two-generator infinite bus power system, are shown to confirm the theoretical results. Peng
and Cheng design a nonlinear PID controller for a power system with superconducting magnetic
energy storage (SMES). The application of the proposed nonlinear PID control to an example shows
satisfactory performance and good robustness of the controller. The feasibility of the controller is
testified as well through the simulation.