An advanced unified power flow controller (AUPFC) using energy storage

This paper describes several new topologies of an intelligent power compensation system utilizing energy storage to enhance power system performance and reliability. The system can also provide all the benefits associated with a unified power flow controller (UPFC). In one single device, the advanced unified power flow controller (AUPFC) can provide: (i) fast control of real and reactive power along a transmission corridor; (ii) phase angle control; (iii) series compensation; (iv) shunt reactive power compensation; (v) harmonic compensation; (vi) load leveling; (vii) voltage stability improvement; and (viii) back-up supply. These UPFCs can provide improved power system operation and control, added system security and reduced power system losses.