الفهرس 
THE EVOLUTION OF PHASOR TECHNOLOGY
WIDE AREA SYSTEM COMPONENTSOnly 14 pages are availabe for public view
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Abstract
With the rapid expansion of power systems to meet increasing load
demands, and under economical constraints imposed by the electricity utilities
that leads to operate the system close to their limits, system wide disturbances
become more likely to take place. These disturbances may lead to cascaded
outages which would cause system blackout. However, advanced
measurements and communication technology in wide area monitoring and
control can provide better approaches to detect and control system
contingencies.
Wide area protection is a concept of using system-wide information
and sending selected local information to remote locations in order to mitigate
the propagation of major disturbances in the power system. The wide area
protection system mainly consists of; Phasor Measurement Units (PMU)
providing a time stamped phasor quantities with the aid of Global Positioning
System (GPS), communication links, and system protection center. The action
taken by wide area protection systems are called Remedial Action Schemes
(RAS) or Special Protection Schemes (SPS). These actions include generator
rejection, load rejection, under-frequency load shedding, system islanding,
.. ,etc.
In this thesis a wide area measunng, protection and control
(W AMP AC) system integrated with a defensive approach to counteract the
transient instabilities in power systems is presented. The system objective is
to maximize the system and avoid occurrence of system blackout. The
proposed technique is designed to give answers to the following major four
questions:
With the rapid expansion of power systems to meet increasing load
demands, and under economical constraints imposed by the electricity utilities
that leads to operate the system close to their limits, system wide disturbances
become more likely to take place. These disturbances may lead to cascaded
outages which would cause system blackout. However, advanced
measurements and communication technology in wide area monitoring and
control can provide better approaches to detect and control system
contingencies.
Wide area protection is a concept of using system-wide information
and sending selected local information to remote locations in order to mitigate
the propagation of major disturbances in the power system. The wide area
protection system mainly consists of; Phasor Measurement Units (PMU)
providing a time stamped phasor quantities with the aid of Global Positioning
System (GPS), communication links, and system protection center. The action
taken by wide area protection systems are called Remedial Action Schemes
(RAS) or Special Protection Schemes (SPS). These actions include generator
rejection, load rejection, under-frequency load shedding, system islanding,
.. ,etc.
In this thesis a wide area measunng, protection and control
(W AMP AC) system integrated with a defensive approach to counteract the
transient instabilities in power systems is presented. The system objective is
to maximize the system and avoid occurrence of system blackout. The
proposed technique is designed to give answers to the following major four
questions: