The electric power industry is undergoing a restructuring process. The major goals
of the change of the industry structure are to motivate competition, reduce costs and
improve the service quality for consumers. In the meantime, it is also important for the
new structure to maintain system reliability. Power system reliability is comprised of
two basic components, adequacy and security. In terms of the time frame, power system
reliability can mean short-term reliability or long-term reliability. Short-term reliability
is more a security issue while long-term reliability focuses more on the issue of
adequacy. This dissertation presents techniques to address some security issues
associated with short-term reliability and some adequacy issues related to long-term
reliability in deregulated power systems.
Short-term reliability is for operational purposes and is mainly concerned with
security. Thus the way energy is dispatched and the actions the system operator takes to
remedy an insecure system state such as transmission congestion are important to shortterm
reliability. Our studies on short-term reliability are therefore focused on these two
aspects. We first investigate the formulation of the auction-based dispatch by the law of
supply and demand. Then we develop efficient algorithms to solve the auction-based
dispatch with different types of bidding functions. Finally we propose a new Optimal
Power Flow (OPF) method based on sensitivity factors and the technique of aggregation
to manage congestion, which results from the auction-based dispatch. The algorithms
and the new OPF method proposed here are much faster and more efficient than the
conventional algorithms and methods. With regard to long-term reliability, the major issues are adequacy and its
improvement. Our research thus is focused on these two aspects. First, we develop a
probabilistic methodology to assess composite power system long-term reliability with
both adequacy and security included by using the sequential Monte Carlo simulation
method. We then investigate new ways to improve composite power system adequacy in
the long-term. Specifically, we propose to use Flexible AC Transmission Systems
(FACTS) such as Thyristor Controlled Series Capacitor (TCSC), Static Var
Compensator (SVC) and Thyristor Controlled Phase Angle Regulator (TCPAR) to
enhance reliability.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/3113 |
| Date | 12 April 2006 |
| Creators | Li, Yishan |
| Contributors | Huang, Garng M. |
| Publisher | Texas A&M University |
| Source Sets | Texas A and M University |
| Language | en_US |
| Detected Language | English |
| Type | Book, Thesis, Electronic Dissertation, text |
| Format | 674319 bytes, electronic, application/pdf, born digital |
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