25-01-2012, 04:52 PM
ECONOMIC LOAD DISPATCH WITH VALVE-POINT EFFECT USING ARTIFICIAL BEE COLONY ALGORITHM
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INTRODUCTION
the economic load dispatch is an important real time
problem, in properly allocating the real power demand
among the online generating units. Traditional optimization
techniques [1] such as the lambda iteration method, gradient
method, the linear programming method and Newton’s
method are used to solve the ED problem with monotonically
increasing cost function. But they are highly sensitive to
starting points and often converge to local optimum or diverge
altogether. In reality, the input-output characteristic of
generating units are non-linear due to valve-point loading and
more advanced algorithms are worth developing to obtain
accurate dispatch results.
PROBLEM FORMULATION
The main cost incurred in power generation is the operating
fuel cost and the problem is to minimize the total fuel cost
RESULTS
The applicability and validity of the ABC algorithm for
practical applications has been tested on various test cases.
The obtained best solution in fifty runs are compared with the
results obtained using GA [21]. All the programs are
developed using MATLAB 7.01 and the system configuration
is Pentium IV processor with 3.2 GHz speed and 1 GB RAM.
CONCLUSION
The proposed ABC algorithm has been applied successfully
to solve the non-convex ELD problem of units with valvepoint
effect. In this paper, simulations are carried out using
GA and ABC algorithm. The disadvantages of GA are longer
computation time and less guaranteed convergence
