Title :
Multi-pulse STATCOM operation under unbalanced voltages
Author :
Cavaliere, Carlos A C ; Watanabe, Edson H. ; Aredes, Maurício
Author_Institution :
COPPE, Univ. Fed. do Rio de Janeiro, Brazil
Abstract :
This work presents a study about static synchronous compensators (STATCOM) operating in electrical systems where the voltages are unbalanced and contain negative sequence components. In balanced systems the STATCOM has a very good performance, allowing compensation of capacitive or inductive reactive power with a fast transient response. However, when there are negative sequence components, the STATCOM has its performance diminished. An analytical analysis, using the instantaneous power theory and the switching functions technique, and simulations of a STATCOM quasi 48-pulses using the electromagnetics transients program (ATP-EMTP) show how STATCOM is affected by negative sequence components and how its performance is degraded. A proposal to improve the STATCOM performance under negative sequence unbalance is shown.
Keywords :
EMTP; static VAr compensators; switching; transient response; ATP-EMTP; capacitive reactive power compensation; electrical systems; electromagnetics transients program; fast transient response; inductive reactive power compensation; instantaneous power theory; multi-pulse STATCOM operation; negative sequence components; quasi 48-pulses; static synchronous compensator; switching functions; unbalanced voltages; Automatic voltage control; Capacitors; Degradation; EMTP; Frequency; Pulse width modulation; Pulse width modulation inverters; Reactive power control; Transformers; Voltage control;
Conference_Titel :
Power Engineering Society Winter Meeting, 2002. IEEE
Print_ISBN :
0-7803-7322-7
DOI :
10.1109/PESW.2002.985066
