Applications of phasor measurements to the real-time monitoring of a power system
Abstract
This thesis discusses applications of phasor measurement units to power system
monitoring and synchronous generator modeling. Adjustments to a previously developed
PMU placement algorithm are described which observe generator and tie line flows
explicitly and reduces the number of PMUs required for a system, still observing the
major dynamic components of a system. This adjusted methodology leaves some buses
unobserved. A method for estimating the state of the unobserved region is developed
based on using constant admittance or constant current load models. These models are
accurate for a small neighborhood around the operating point when they were calculated.
To determine the maximum error expected for any given system estimate, an equation
relating the maximum error in the voltages to the maximum change in load power is
derived. Once the issue of power system monitoring has been presented, the application
of PMUs to the synchronous generator modeling is explored. This thesis deals with the
on-line identification of the generator transient model using a recursive version of the
generalized least squares algorithm. Simulations have been performed to demonstrate the
validity and difficulties with these methods.
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- Masters Theses [19598]