MICROCONTROLLER BASED
ELECTRONIC LOAD CONTROLLER
FOR MICROHYDRO SYSTEM
PROJECT TEAM
• SAILESH DAHAL
•ANIL WAGLE
•AMIR RAJ GIRI
•BIKESH SHRESTHA
•SANDESH ACHARYA
abstract
• The proposal “Microcontroller based Electronics Load Controller
for micro-hydro system” presents design of a microcontroller based
electronic load controller (ELC) for synchronous generator intended
for a stand- alone micro hydro power generation. An Electronic Load
Controller (ELC) is an electronic unit which keeps the speed of
synchronous generator constant at varying load conditions. The
generator is driven in constant speed with constant power output. A
dump load is connected across the generator terminals to dump the
excess power generated. When the consumer load changes frequency
of generated voltage also changes. The frequency is sensed and
compared with the reference frequency and error so obtained is
utilized to control power consumed by dump load so that generator
always operates at its full rating, resulting in constant speed.
ELC
Generated power = Consumed power + Dump Load
BLOCK DIAGRAM
DIVISON OF WORK MODULE
ELC
MIRCROCONTROLLER
PW MODULATION
SLOPE OF
SLIP OF GEN
LCD
DISPLAY
PUSLE WIDTH
DETERMINATION
POWER
SUPPLY
DC CHOPPING
FREQUENCY
SENSING
SINE WAVE TO
SQUARE
BRIDGE
RECTIFICATION
MOSFET
DRIVING
FREQUENCY MEASUREMENT
POWER SUPPLY AND SINE TO
SQUARE CONVERSION
Sine to Square Conversion
FREQUENCY vs. POWER ANALYSIS
Theoretical Analysis
Practical Results
BRIDGE RECTIFICATION
Rectified
output
Input
from the
generator
M AT LAB SI M U LINK M OD EL
OU T P UT
R E S U LT F RO M E X P E R I ME NT
WORK REMAINING
• MOSFET for switching the dump load
• Filter circuit design
• Using a Current sensor for displaying the current level
• PCB design
• Fabrication.
• Interfacing GUI with Hardware
• Final testing and demonstration
CONCLUSION
•Need to Overcome the complications
•Search for Possible advancement in project
•Focused on other objectives
Matlab simulation
Trends of commercialization in ELC
REFERENCES
• [1] Sen, P.C. (1998). Principles of Electric Machines and Power Electronics (2nd Ed.). John Wiley and Sons, New York
• [2] Bimbhra, P. S. (2007). Electrical Machinery (7th Ed.). Khanna Publishers, India.
• [3] http://www.microhydropower.net/index.php Viewed on 2013/10/13
• [4] http://home.planet.nl/~porte000/humbird/ Viewed on 2013/11/29.
• [5] DYNAMIC SIMULATION, ANALYSIS AND CONTROL OF SELF-EXCITED INDUCTION GENERATOR USING STATE
SPACE APPROACH by Anjali Garg, K.S. Sandhu, L.M. Saini. Available at
http://www.jee.ro/articles/WP1350027166W5077c79f0002b.pdf
• [6] Pankaj kapoor, Lobzang Phunchok, Sunandan Kumar, Asst. Prof. Om Prakash R Journal of Engineering Research and
Applications (IJERA) ISSN: 22; www.ijera.com Vol. 2, Issue 4, June-July 2012, pp.733-737
• [7] Review On Electronic Load Controller by Vimal Singh Bisht,Y.R Sood, Nikhil Kushwaha and Suryakant International
Journal of Scientific Engineering and Technology (ISSN : 2277-1581) www.ijset.com, Volume No.1, Issue No.2 pg:93102
• [8] Thesis on "THE DESIGN OF A 5 kW MICROHYDRO GENERATING SET" by SIMON SANGHARETH HENG,
Department of Mechanical Engineering, University of Canterbury February 1992
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