Distributed energy is an attractive alternative to typical centralized energy sources specifically for remote locations not accessible to the electricity grid. With the continued
advancement into new renewable technologies like solar, wind, fuel cell etc., off-grid standalone systems are becoming more attractive and even compeating on a
cost basis for rural locations. Along with the environmental and sustainable movement,
these technologies are only going to get more and more popular as time goes
on. Power electronic converters are also advancing which will help the shift in electricity
options. Creating innovative power electronic systems will be important when
moving toward smaller, more e cient and higher power density solutions.
As such, this thesis will aim to design and create an integrated power electronic
system for an o -grid standalone solar application designed for remote rural locations
with no access to electricity, or in locations which could bene t from such a system.
It is designed for a DC input source from 24V-40V, such as a solar panel, and can
operate four di erent loads; one 12V-24V 100 W DC load, charge a 48V battery, run
three 5V cell phone charger outputs and run one 230V, 50Hz, 1 kW AC load. A
boost converter, buck converter, phase shifted full bridge isolated DC-DC converter
and a single phase inverter are implimented in the integrated system to achieve these outputs. A comparison of similar products on the market are presented and compared
with the proposed design by showing the product speci cations, advantages
and disadvantages of each.
A discussion of each converter in the system is presented and will include operation,
design and component selection. An in-depth design process for the inductor
within the boost converter is presented and will cover core, winding design and an
optimization algorithm using the Genetic Algorithm (GA) is used to compare di erent
ferrite based C-C shaped inductors. More speci cally, the core material selected
is Ferroxcube 3C97 and the inductor comparions are between di erent Litz bundled
windings from New England Wire Tecnologies and a customized rectangular winding.
The GA optimizes around the lowest volume by comparing the di erent inductor
designs using the di erent Litz winding constructions and the custom rectangular
winding constrictuion. The rectangular winding achieves the lowest volume and will
be compared with a three phase interleaved boost design implimenting a CoilCraft
inductor. The buck converter is the simplest converter and is designed using the traditional
methods in literature. An in-depth design process for the phase shifted full
bridge converter is also done wherein the zero voltage switching (ZVS) is achieved.
The DC-AC inverter is the last converter designed within the integrated system and
covers input capacitor sizing, and output lter design. There are speci c distributed
energy standards that must be followed when connecting loads to the system and so
the purpose of the lter is to lter out the voltage harmonics. The control techniques
for each converter is also discussed and shown to operate in both simulation and in
experimentally.
The losses within the system are discussed and the required equations are de ned / Thesis / Master of Applied Science (MASc)
| Identifer | oai:union.ndltd.org:mcmaster.ca/oai:macsphere.mcmaster.ca:11375/22247 |
| Date | January 2017 |
| Creators | Schumacher, Dave |
| Contributors | Emadi, Ali, Schofield, Nigel, Electrical and Computer Engineering |
| Source Sets | McMaster University |
| Language | English |
| Detected Language | English |
| Type | Thesis |
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