optimal scheduling of hydrothermal system considering variable nature of water transportation delay

This paper presents solution of short-term hydrothermal scheduling problem using an algorithm called grasshopper optimization. the objective of hydrothermal scheduling is to reduce the total cost of generation by optimizing the output of power generation of different thermal and hydro plants for a certain time interval. a non-linear relationship between hydropower generation, net head and rate of water discharge is considered here. the complicated head-sensitive water-to-power conversion and piecewise output limit is also considered. to investigate the performance of this new technique, two test systems have been considered. the simulation results are compared with some well-known optimization methods such as genetic algorithm, biogeography based optimization, hybrid differential evolution with biogeography based optimization and grey wolf optimizer algorithm. the simulation results show the superiority of this technique as compared to other well-known optimization methods.