Transient analysis of SVC response in the South Region of the Libyan Transmission Network

One of the most common problems in sparsely connected power systems is the reduction of power transfer capabilities, due to voltage stability problems. They usually appear in electrically distant and poorly compensated parts of a power system with concentrated consumption. This paper presents one approach to solve the voltage issues, by introducing FACTS devices, like Static Var Compensators (SVC) in the South Region of the Libyan Transmission Network. P-V and Q-V analysis were applied to determine suitable locations and sizes for the reactive compensation. The study found that reactive power compensation needs to be installed at the following 220 kV locations in the South Region: Sebha (300 MVAr SVC) and GMMR2 (50 MVAr capacitor bank). A combination of mechanically switched shunts and SVC was also considered as a more cost-effective solution than the power electronics based SVC. Transient response of SVC at a 220 kV substation Sebha was analysed focusing on the voltage conditions in the surrounding system.