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While unit commitment (UC) is an off-line problem, economic dispatch (ED) is an area of online concern.The commitment decisions are made many weeks or months in advance.
"This thesis is composed of two papers which investigate the optimal dispatch for distributed energy resources.
This is an optimization problem which needs to be resolved as quick as possible.
For a given load demand, power flow study can be used to calculate active and reactive power generations, line flows and losses.The decision to commit a generating unit to be able to produce electricity means that the power utility is willing to incur fixed costs related to unit startup in order to have that generating units ready and available to generate electricity in real time.Large turbine or nuclear plant generators with large start-up costs cannot run optimally if their output is determined using a singleperiod analysis (a “period” in the electric power industry usually refers to a length of time of about an hour).This paper presents a comparative study of metaheuristics algorithms in evaluation of economic load dispatch problem in power generating station with MATLAB codes.In this paper, the formulation of the ELD problems using mathematical illustrations and MATLAB codes were presented.The ELD problem was modeling using Egbin thermal power station, Nigeria as our case study.Economic Load Dispatch (ELD) is the reduction of the total cost of power generation (which includes fuel consumption and operational cost) of power generating plants while meeting the various loads demand and power losses in the power transmission system.Various objective functions including voltage regulation, reduced transmission line power losses, and minimized reactive power charges for a microgrid are introduced.Combinations of these goals are attained by solving a multiobjective optimization for the proposed ORPD problem.In addition, each agent is capable of trading electricity with other agents through a local energy market.In this paper, a simple market structure is introduced as a framework for energy trades in a small community microgrid such as the Solar Village.