Reactive Power Flow Calculation Under Line Outage Condition using Differential Evolution (DE)

Abstract

This paper presents an optimization based technique for calculation of reactive power flow under line outage condition. Traditional sensitivity based method provides an approximate solution due to presence of non-linearity. This deficiency has been overcome by formulating line outage as non-linear constrained optimization problem for a bounded network. A population based search algorithm namely Differential Evolution (DE) has been applied for optimization. The methodology is tested on IEEE 14 bus system and simulated results are compared with the results of AC power flow which shows that the proposed method improves the accuracy in reactive power flow and bus voltage values under line outage condition.

Keywords- Differential Evolution, Reactive Power flow, Bus Voltage, Line outage