Power systems on modern commercial transportation systems are moving to
more electric based equipment, thus improving the reliability of the overall system.
Electrical equipment on such systems will include some loads that require very high
power for short periods of time, on the order of a few seconds, especially during
acceleration and deceleration. The current approach to solving this problem is sizing the
electrical grid for peak power, rather than the average. A method to efficiently store and
discharge the pulsed power is necessary to eliminate the cost and weight of oversized
generation equipment to support the pulsed power needs of these applications. Highspeed
Flywheel Energy Storage Systems (FESS) are effectively capable of filling the
niche of short duration, high cycle life applications where batteries and ultra capacitors
are not usable. In order to have an efficient high-speed FESS, performing three
important steps towards the design of the overall system are extremely vital. These steps
are modeling, analysis and control of the FESS that are thoroughly investigated in this
dissertation. This dissertation establishes a comprehensive analysis of a high-speed FESS in
steady state and transient operations. To do so, an accurate model for the complete FESS
is derived. State space averaging approach is used to develop DC and small-signal AC
models of the system. These models effectively simplify analysis of the FESS and give a
strong physical intuition to the complete system. In addition, they result in saving time
and money by avoiding time consuming simulations performed by expensive packages,
such as Simulink, PSIM, etc.
In the next step, two important factors affecting operation of the Permanent
Magnet Synchronous Machine (PMSM) implemented in the high-speed FESS are
investigated in detail and outline a proper control strategy to achieve the required
performance by the system. Next, a novel design algorithm developed by S.P.
Bhattacharyya is used to design the control system. The algorithm has been implemented
to a motor drive system, for the first time, in this work. Development of the complete set
of the current- and speed-loop proportional-integral controller gains stabilizing the
system is the result of this implementation.
In the last part of the dissertation, based on the information and data achieved
from the analysis and simulations, two parts of the FESS, inverter/rectifier and external
inductor, are designed and the former one is manufactured. To verify the validity and
feasibility of the proposed controller, several simulations and experimental results on a
laboratory prototype are presented.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/ETD-TAMU-3163 |
| Date | 15 May 2009 |
| Creators | Talebi Rafsanjan, Salman |
| Contributors | Toliyat, Hamid A. |
| Source Sets | Texas A and M University |
| Language | en_US |
| Detected Language | English |
| Type | Book, Thesis, Electronic Dissertation, text |
| Format | electronic, application/pdf, born digital |
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