Abbas Rabiee - Sharif University of Technology
Behnam Mohammadi Ivatloo - Sharif University of Technology

Voltage stability is concerned with the ability of a power system to maintain acceptable voltages at all buses in the system under normal conditions and after being subjected to a disturbance.This paper assess the management of reactive power generation to improve the voltage stability margin. The management of the var generation formulated as an optimization problem and non-linear programming (NLP) was used to obtain the optimal solution. The simulation results show that after the optimal reactive power rescheduling the reactive power reserves of the system is increased and the active/reactive power losses are decreased. The most important advantage is that, the voltage stability margin of power system can be improved without adding new var compensation equipment and changing the active power distribution.

voltage stability, Reactive power management, Optimal power flow (OPF), Rescheduling