A review on optimal power flow problem and solution methodologies

The main motto of power system is to provide reliable power supply with most economical cost. To achieve this motto, there is need of various tools which can monitor, analyze and control the power system. Few of them are Economic Dispatch (ED) and optimal power flow (OPF). ED has aims to plan committed generating units to fulfill load demand for minimizing cost without violating equality and inequality constraints. OPF problem is tool to achieve optimal state of control variables by minimizing desired objective with satisfying all related constraints. The conventional methods are used to solve OPF but due to hybrid generation scenario the system become more complex where conventional method fails to achieve objective. So nature inspired called artificial intelligence methods inspected to solve complex OPF problem. The focus of this paper to prompt review study on various optimization techniques used to solve OPF for better understanding of all methods used in past.