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MID YEAR PROJECT
PRESENTATIONS
Presentation by;
1. Ddamulira Lawrence
2. Sekitene Ronald
Supervisors
1. Mr. Rutalo Michael
2. Prof. Lugujjo Eriabu
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PROJECT TITLE
Installation of grid connected solar PV systems as a means
of coping with load shedding.
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PROJECT BACKGROUND
The Ugandan government continues to devise means
of reducing the severity of Energy deficits.
Only a small portion of the Hydro power potential
estimated at over 2000MW has beentapped.(approximately 33%).
Consumers need to find means of coping with the load
shedding on an individual basis.
Renewable energy sources are a major option.
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PROBLEM STATEMENT
There is an energy deficit of at least 100MW and
50MW during peak and off peak demand periods
respectively according to UETCL.
As a consequence of the energy deficits, the Utility
Company Umeme is compelled to carry out scheduled
load shedding .
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TYPICAL LOAD CURVE, UGANDA
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PROJECT JUSTIFICATION
Ugandan power consumers need to come to terms with
the existing state of affairs.
Measures in place so far will not be able to alleviate
the Energy deficit because increase in demand farexceeds growth in generation.
The load growth is estimated at 10% per annum, with
an approximate 17,000 new residential connections per
annum as per 2010 according to Umeme
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PROJECT JUSTIFICATION
Uganda is endowed with plenty of sunshine giving
solar radiation of about 4-5 kWh/m2/day
This level of insolation is quite favorable for all solar
technology applicationsThe Ugandan government has a target of raising the
renewable Energy usage to 61% by 2017.
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MAIN OBJECTIVE
To optimize the design of grid connected solar P.V
systems under Ugandan conditions.
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SPECIFIC OBJECTIVESTo establish the average power consumption of
residential consumers for a given sample within a casestudy area.
To size an appropriate grid connected solar P.V system
basing on the average power consumption establishedfrom the case study area.
To determine the overall initial capital investmentrequired for installation of the Grid connected solar
P.V systems.To harmonize power being contributed by the solar P.V
system with the grid in terms of frequency and voltage.
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METHODOLOGY
Literature Survey
Sizing the PV system suitable to supply the existing
load
Consultations with Ministry of Energy and Mineraldevelopment.
Consultations with the department of meteorology for
the up to date sunshine data
Consultation with the main solar companies involvedin supply and installation of PV systems.
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EXPECTED RESULTSAn Optimum design of a grid connected solar P.V system.
The initial capital investments required in the installation ofa particular size of grid connected solar P.V system for ahousehold.
The possible reduction in the consumers monthly bill as aresult of the installation of the grid connected solar P.Vsystem.
How the option of grid connected solar P.V systemcompares with other possible ways of coping with loadshedding in terms of cost, constraints and benefits.
Recommendations as to best ways of realizing maximumefficiency of grid connected solar P.V systems underUgandan conditions.
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PROGRESS
Covered most of the relevant literature
Obtained a partnership with the Ministry of Energy
and Mineral development to execute the project under
supervision of Eng. Atwine Abdon.Established a case study residential area in Gayaza,
Wakiso district.
Established the average load demand from a sample of
five homes in the case study area.
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TYPICAL SYSTEM DESIGNS
1. Grid interactive only;
y Mainly suitable in cases where utility outages are rare.
2. Grid interactive with battery back up.
y
Can work well even for cases with common utilityblackouts, just like Uganda.
y battery keeps critical load circuits in the house
operating during a utility outage
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GRID INTERACTIVE ONLY
BLOCK DIAGRAM
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SYSTEM WITH BATTERY BACKUP
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SIMPLE SYSTEM LAYOUT
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THE HOUSEHOLDS SAMPLED
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LOAD DEMANDHOME 1 HOME 2 HOME 3 HOME 4 HOME 5
Lighting 277W 506W 714W 754W 205W
Entertainment
equipment
602W 601W 574W 448W 2461W
Heating
equipment
1695W 5500W 1790W 5545W 2100W
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TIMELINE
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