Pollution emission reduction with minimum transmission loss in power dispatch including renewable Xenergy and energy storage

Operating policies with minimum pollutants emission and transmission loss for an entire day is power dispatch operation are discussed in this paper. One of the main objectives of Economic/Environmental Dispatch (EED) and Environmental Friendly Dispatch (EFD) is to optimize the amount of pollutants emitted from the hybrid power plants. EED is an important multi-objective problem which minimizes both the fuel cost of generation and the amount of pollutants emission while EFD has the single objective of optimizing the amount of emission only. Here, EED and EFD are modified and renamed as EEDL and EFDL, respectively by including minimization of transmission loss as an additional objective. Optimization of these problems determines the amount of optimum generation which to be allocated to each generating unit including renewable sources without violating system constraints and minimizing the amount of pollutant emissions as well as transmission losses. Extraction and storing of renewable energy at off-peak times or at times when there would be a surplus of its availability and reuse of such stored energy during its unavailable periods makes such approach more effective. Optimum EEDL and EFDL can be obtained by extracting maximum renewable energy during their availability periods, then using it for both available and unavailable periods with the aid of energy storage. MATLAB simulations are performed using IEEE-30 test bus data with 6 generators to illustrate the benefits of renewable energy storage in reducing the unwanted pollutants emission.