Abstract
Unit commitment is a key and important function in power system operation. The goal of this function is to supply the load demand economically. In order to achieve this goal, unit commitment function determines the condition of the units to be on or off and the amount of generation for generating units of power system for a period of time. The extended form of this operational function, i.e. Security constrained unit commitment, which is the objective of this paper, considers the security constraints, for example transmission lines overload, beside the other constraints in determining the condition of the generating units to be on or off. In this paper, a hybrid method is proposed for dynamic programming, genetic algorithm and particle swarm optimization. In order to solve the unit commitment of power systems considering system security constraints. The condition of the units to be on or off and economic dispatch are determined and solved by considering system security constraints through previously mentioned combination method.
Highlights
Unit commitment (UC) in power system includes Ādetermination of planning the units to be on and off in order to supply the forecasted load in a period of time
In order to solve the Security constrained unit Ācommitment (SCUC) problem using the combination of binary Particle Swarm Optimization (PSO) algorithm and genetic algorithm which are included with dynamic programming (DP)[1, 4]
It should be noted that each element of matrix āIā is determined randomly and is equal to 1 or 0 and the previously mentioned matrix is only related to one group of population and in order to produce the whole population, several matrix should be created like matrix āIā equal to number of existing groups in population
Summary
Unit commitment (UC) in power system includes Ādetermination of planning the units to be on and off in order to supply the forecasted load in a period of time. Constraints such as load balance, system spinal reserve, unit generation limit, pollution etc. Generation configuration is considered in power system and security constraints are determined for UC operation function. Large modern units are equipped with multi-valves turbines and the unit output would have a waveform curve which is called valve point effect[3] By considering this form of output the problem will be so complicated. Fazlollah Rouhi and Reza Effatnejad arrangement considering system security constraints which may lead to minimizing the cost and improving the security level of the network
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