Title :
Phase leg voltage balancing of a cascaded H-Bridge converter based STATCOM using zero sequence injection
Author :
Summers, T.J. ; Betz, R.E. ; Mirzaeva, G.
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Univ. of Newcastle, Newcastle, NSW, Australia
Abstract :
In cascaded H-bridge wye and delta connected STATCOMs the phase leg capacitor voltages can diverge, even under ideal balanced voltage conditions, due to different leg losses and capacitor values. This paper presents a novel strategy for achieving phase leg voltage balance for wye and delta connected STATCOMs by making use of zero sequence injection into the STATCOM. The proposed strategy also makes the STATCOM leg voltages tolerant to terminal voltage imbalance.
Keywords :
power convertors; static VAr compensators; cascaded H-Bridge converter; cascaded H-bridge wye; delta connected STATCOM; phase leg voltage balancing; static synchronous compensator; zero sequence injection; Automatic voltage control; Bridge circuits; Capacitors; Diodes; Leg; Phase measurement; Power supplies; Reactive power; Topology; Voltage control; Multilevel Converter; Static Synchronous Compensator;
Conference_Titel :
Power Electronics and Applications, 2009. EPE '09. 13th European Conference on
Conference_Location :
Barcelona
Print_ISBN :
978-1-4244-4432-8
Electronic_ISBN :
978-90-75815-13-9
