Voltage profile optimization using crow search algorithm modified with Lampnien’s criterion to account inequality constraints

Adequate load bus voltage has been obtained by rescheduling of reactive power control variables and distribution generation based on PV system. A significant increase in numbers of electric vehicle (EVs) occurs every year and then increase in number of EV charging substations. An adequate voltage profile is desirable for efficient charging of EVs. Thus, with the help of developed methodology a secure and reliable supply system is obtained for EVs charging substation. This paper presents methodology for optimizing voltage profile of a power network by rescheduling usual reactive power control variables employing three optimization techniques, i.e., modified crow search algorithm (CSA), sine cosine algorithm (SCA) and Rao-1 algorithms. The selected objective function is a quadratic function. Deviations around nominal values of voltage squares are minimized by summing over all load bus voltages. Inequality constraints have been accounted using Lampnien’s criterion incorporating in all three techniques. A comparison based on statistical inferences has been provided for results obtained on IEEE 14 and 25 bus test systems. Results obtained by CSA, SCA and Rao-1 techniques are in close agreement.