The full capacity of the existing transmission lines is often underutilized
due to the system stability requirements. Controllable network devices represent
the effective means of improving the system stability, and their deployment allows
better use of the existing transmission facilities and can help to avoid construction of
new lines. This dissertation addresses system analysis and modeling of controllable
network devices.
Transient angle stability is one of the major requirements limiting transfer
capability of the power transmission systems. The theoretical concepts of transient
angle controllability using controllable network devices are considered in this dissertation.
The main results are derived for a general transmission network structure
and applied to series and shunt compensators as well as braking resistors. The
proposed approach allows to quantify controllability and to relate it to the control
device size, type and location in the transmission network.
Transient stability controllers are needed to maximize the device effect on the
transient angle stability enhancement. The transient stability controller functional
structure is discussed and the design requirements for each component are specified.
The examples of controller designs are presented.
Emerging technologies such as Thyristor-Controlled Series Compensators and
Synchronous Voltage Sources offer superior control capabilities and performance
characteristics as compared to conventional compensators. Unlike conventional compensators,
the new controllable network devices are very complex dynamical systems
and require more comprehensive modeling for time-domain studies and controller
designs. Detailed models of a Thyristor-Controlled Series Compensator and a Synchronous
Voltage Source for powerflow, transient stability, and electro-magnetic
transient studies are presented.
Finally, a detailed planning study for increasing transfer capability of the
Montana transmission system using controlled series compensation is presented. A
variety of design and performance requirements is considered in this study, which
makes it a useful reference for similar planning projects. / Graduation date: 1996
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/34617 |
| Date | 28 February 1996 |
| Creators | Kosterev, Dmitry N. |
| Contributors | Kolodziej, Wojtek J. |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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