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BITS PilaniHyderabad Campus
MULTIPLE CRITERIA EVALUATION OF
WIND ENERGY SYSTEMS
Pushkar Kumar Jain, B.E. (Hons.) Mechanical
Morapakla Srinivas, Assistant Professor,
Department of Mechanical Engineering
BITS Pilani, Hyderabad Campus
ENERGY – A NEED!!
BITS Pilani, Hyderabad Campus
• Viability in simple terms, is the capability
of a project to function, in the desired
manner.
• Mathematically, it is a function of various
mutually exclusive criteria which are to
be taken into account for setting up a
project.
• “Dimension” is defined as a group of
several elements of same category
which have a direct or indirect bearing
on the “viability”
VIABILITY
Site factors
Social factors
Economic factors
Viability
BITS Pilani, Hyderabad Campus
• The viability of a wind energy system at a particular place is a function of multiple
factors that may be mutually dependent and so it is a multiple criteria problem
• Proposed MCE technique - divided into five stages:
MULTIPLE CRITERIA EVALUATION PROCESS
BITS Pilani, Hyderabad Campus
• For analysis, the dimensions
considered are - Site factors,
Economic Factors and Social
Factors
• Under each of these categories,
two sub-categories, one to be
maximized and another to be
minimized, are created and the
mutually exclusive sub-critera that
are constructed are grouped
accordingly Economic – Cost and Revenue
Site – Favourable and Restrictions
Social – Favourable and Restrictions
MCE MODEL HIERARCHY
BITS Pilani, Hyderabad Campus
DEFINITIONS OF FACTORS
BITS Pilani, Hyderabad Campus
DEVELOPMENT OF INTERFACE
BITS Pilani, Hyderabad Campus
The following points will be used:
(1) AND method: min
(2) OR method: max
(3) Implication: AND
(4) Aggregation: max
(5) Defuzzification: Centroid
(6) FIS Type: Mamdani.
(7) Symmetric triangular membership function and
a five point scale
(8) Expressions used in the membership function,
to allot values for different sites are “Very bad”,
“Bad”, “Average”, “Good”, “Very Good0 2.5 3.751.25 5
1
Very GoodGood BadVery Bad Average
BITS Pilani, Hyderabad Campus
BITS Pilani, Hyderabad Campus
SIMULINK MODEL
BITS Pilani, Hyderabad Campus
GRAPHICAL USER INTERFACE DEVELOPED
BITS Pilani, Hyderabad Campus
• Selection of wind energy site is a multiple criteria problem,
solved by MCDM technique namely Fuzzy Logic
• Multiple criteria decision making problem can be formulated
into a hierarchial model for analysis.
• Same methodology can serve for any number of dimensions
• “Viability” when found out for various sites, serves as a gauge
for comparison and preference
CONCLUSION
BITS PilaniHyderabad Campus
THANK YOU!