Thesis (DTech (Electrical Engineering))--Cape Peninsula University of Technology, 2010. / Static state estimation is a mathematical procedure in which physical measurements from
sub-stations and physical model are combined in an optimal way. That is, the measurements
obtained from the sub-stations are used with the physical model and the states of the power
system are selected or calculated such that the states match the measurements in some
best way. The states of a power system are the bus voltage magnitude and voltage angle of
each bus of the system.
Static state estimation is an increasingly common part of electrical power utility energy
management systems (EMS). It plays a critical part in a day-to-day operation of a power
system utility. The system measurements obtained from static estimation are used for realtime
operations like optimal power flow calculations and contingency analysis. Proper system
operations with regards to avoidance of insecure conditions includes situational awareness,
therefore, the static estimator plays an important role in power system security. A further
motivation: in increasingly electrical power deregulation, more economic operations mean
savings for customers and electrical power provider alike. Economic benefit might be
realized if system operators have a more accurate situational awareness of the system
through improved power system state estimator. The objective of the study was to develop method, algorithm and MATLAB program for
solution of power system state estimation using parallel processing techniques. In achieving
the objective, the study has concentrated on development of an approximate Tanzanian
power system network model comprising of 30 buses and used as a case study;
decomposing the bus admittance matrix of the model into 3 interconnected sub-systems;
development of mathematical model for real and reactive power injections, real and reactive
power flows in the transmission lines and tie-lines connecting the sub-systems; development
of measurement data model for voltage magnitude, real and reactive power injections, real
and reactive power flows; formulating of a constrained weighted least absolute value state
estimation problem; development of decomposition-coordination method and algorithm; and
formulating algorithm and MATLAB program for solving the constrained state estimation
problem using parallel processing technique.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:cput/oai:localhost:20.500.11838/2186 |
| Date | January 2010 |
| Creators | Kusekwa, Mashauri A. D. |
| Contributors | Tzoneva, R. |
| Publisher | Cape Peninsula University of Technology |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Rights | http://creativecommons.org/licenses/by-nc-sa/3.0/za/ |
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