This paper presents studying the performance of distance impedance relay with the
presence of FACTS devices. Also the measured impedance at the relaying point in the
presence of series FACTS device SSSC, and shunt FACTS device called STATCOM are
obtained. A detailed model of both SSSC and STATCOM is introduced and then the faulty
system is studied analytically, where the errors in the measured impedance of distance
impedance relay are introduced as a result of the presence of series and shunt FACTS