This thesis proposes a method for designing global Power System Stabilizers (PSS) using Phasor Measurement Unit (PMU) data. The method first designs local PSS using existing input/output selection techniques, but finds that the number of selected inputs and outputs is too large. The thesis then suggests a new algorithm that uses bus/generator clustering with independent component analysis and principal component analysis to reduce the number of input/output candidates. Finally, the design of global PSS is performed using the optimized input/output selection from the new method, PMU data, a genetic algorithm optimization method, and linear matrix inequalities.

1. Master of Science Thesis in Electrical Engineering (Control)
School of Electrical and Computer Engineering
Power and Control Department
PMU-Based Design of Power System Stabilizers in
Electric Power Systems
By
Mahsa Rezaei
Supervised By
Dr. Maryam Dehghani
October 4102
Officious disturbances in power systems cause large oscillations and
consequently losing system stability which justifies the necessity of using Power
System Stabilizers (PSS). Using Phasor Measurement Units (PMU) in designing
PSS, is a solution to increase observability in previous monitoring systems.
Global PSSs receive signals produced by PMUs which are installed on the buses
of power plant.
In this report preliminary actions of designing global stabilizers were provided
by designing local PSSs and surveing Sequential Orthogonalization and Modal
Analysis methods of Input/Output selection. But since the number of selected
Inputs and Outputs derived by these methods, and consequently the number of
needed control devices to realize the purpose of network's observability and
damping, was too much and also the results illustrates the demand for
improvement of response qualities, an algorithm was suggested to resolve the
mentioned problems.
Suggested algorithm is based on reducing the number of I/O candidates by using
a combination of Bus/Generator Clustering with ICA, besides utilization of PCA
technique and finally Modal analysis.
And eventually the design of global Power System Stabilizers was performed by
using PMU data, optimized I/O selected by the suggested method, GA
optimization method, and LMIs.