2Oscillation Dynamics Analysis Based on Phasor Measurements
Modern interconnected wide-area power systems around the world are faced with serious challenging issues in global monitoring, stability, and control mainly due to increasing size, changing structure, emerging new uncertainties, environmental issues, and rapid growth in distributed generation. Under this circumstance, any failure in the planning, operation, protection, and control in a part of the power system could evolve into the cause of cascading events that may even lead to a large area power blackout.
These challenging issues set new demand for the development of more flexible, rapid, effective, precise, and intelligent approaches for power system dynamics monitoring, stability/security analysis, and control problems. The advent and deployment of phasor measurement units (PMUs) provides a powerful tool to enable the measurement-based methodologies for building an online dynamic snapshot-model of power systems based on real measurements to solve the mentioned problems.
This chapter introduces basic concepts of power system oscillation dynamics using phasor measurements and presents some examples for real data monitoring and analysis. Interarea low-frequency oscillations are characteristic phenomena in the interconnected power systems [1–3]. These oscillations have poor damping characteristics in heavy loading conditions on tie-lines, mainly due to the power exchange and complex power contracts under a deregulated ...
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