Prefault Fault STATCOM Bus Voltages (p.u.) 1 0 -1 STATCOM Currents (p.u.) 2 0 -2 1.5 1 0.5 0 d c-L Liiiiiinkk Voltages Li L Voltages l (p.u.)) dc-Liink (p.u.) Idneg Id d ((p.u.) p.u.)) 0.4 0 -0.4 Idneg Id d ((p.u.) p.u.)) 1 0.5 0 Neg. Seq. Current Amplitude (p.u.) 1 0.5 0 0 0.04 0.08 Time (s) (a) Prefault 0.12 0.16 0.2 0.16 0.2 Fault STATCOM Bus Voltages (p.u.) 1 0 -1 STATCOM Currents (p.u.) 2 0 -2 1.5 1 0.5 0 (p.u.)) dc-Liink Voltages (p.u.) g (p.u.) Idneg 0.4 0 -0.4 g (p.u.) (p u.)) (p. Idneg 1 0.5 0 Neg. Seq. Current Amplitude (p.u.) 1 0.5 0 0 0.04 0.08 Time (s) (b) 0.12 figure 10. STATCOM performance (a) without and (b) with DAC. march/april 2016 ieee power & energy magazine 55