Quadratic migration of biogeography based optimization for short term hydrothermal scheduling

This paper presents an optimal dispatch of hydro and thermal power generation in a short term hydrothermal system which is solved by quadratic migration model of biogeography based optimization (QBBO). A mathematical formulation of quadratic model is delineated how species survive from one habitat to another habitat and gets annihilated. The performance ability of the proposed QBBO approach is applied to solve complex short term hydrothermal scheduling (STHTS) optimization problem. The STHTS problem has been represented as a nonconvex, nonlinear combinatorial problem considering diverse constraints. The effectiveness of QBBO approach is examined on four cascaded hydro plants and an equivalent thermal plant. The simulation results obtained with QBBO approach is compared with reported methods in literature. It is observed from the simulation studies that the obtained results using QBBO approach is better in terms of minimum total production cost and execution time as compared to other published methods recently.