APPLICATION OF STATIC VAR COMPENSATOR FOR VOLTAGE STABILITY ENHANCEMENT AND POWER LOSS REDUCTION IN POWER SYSTEM NETWORKS

In power systems, the mismatch between electricity supply and demand has led to difficulty in maintaining the system voltages within the statutory limit, causing voltage stability problem and consequently poor power transfer. This work is an application of Static Var Compensator (SVC) for voltage stability enhancement and power loss reduction in power system networks using the standard IEEE 6, 14, and 30-bus power networks as case studies. Using MATLAB/PSAT software (version 2.1.9 ‘R2012a’), the Newton-Raphson power flow modeling the steady state conditions of the sample networks was simulated without and with SVC. The simulation results revealed that the voltage profiles of all the considered networks were enhanced and within acceptable limit of  after compensation was applied. The system total real power losses of the considered IEEE 6, 14 and 30-bus power networks which were 7.88, 25.76 and 16.05 MW respectively without SVC reduced to 7.08, 24.42 and 15.88 MW respectively with SVC, giving 10.15, 5.20 and 1.06% reduction in total real real power loss respectively for the sample networks. These results showed that SVC as a compensating device is capable of enhancing voltage profile and reducing power loss if incorporated in power system networks