microcontroller based electronic load controller for microhydro system project team sailesh dahal...

MICROCONTROLLER BASED ELECTRONIC LOAD CONTROLLERFOR 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

SLOPE OF SLIP OF

GEN

MIRCROCONTROLLER DC CHOPPING

PUSLE WIDTH DETERMINATI

ON

PW MODULATION

BRIDGE RECTIFICATI

ON

FREQUENCY SENSING

MOSFET DRIVING

POWER SUPPLY

SINE WAVE TO SQUARE

LCD DISPLA

Y

FREQUENCY MEASUREMENT

POWER SUPPLY AND SINE TO SQUARE CONVERSION

Sine to Square Conversion

FREQUENCY vs. POWER ANALYSIS

Theoretical Analysis Practical Results

BRIDGE RECTIFICATION

MATLAB SIMULINK MODEL OUTPUT RESULT FROM EXPERIMENT

Input from the

generator

Rectified

output

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 simulationTrends 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:93-102

• [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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