SVC and STATCOM An overview - ABB

APPLICATION NOTE S VC a n d STATCO MAn overview SVC and STATCOM : An overviewSVC (Static Var Compensator) and STATCOM (Static Synchronous Compensator) are shunt devices in the FACTS family. The initial of the two, SVC, based on high power thyristor technology, appeared in the field in the 1970s. STATCOM , based on GTO (Gate Turn-off Thyristors) came into use in the 1980s, and subsequently, with high power IGBT (Insulated Gate Bipolar Transistor) becoming commercially avail-able, STATCOM based on this technology platform came on line in the 1990s. As power demand is on the rise in most parts of the world, power transmission facilities need to keep up, as well. Building more power lines may not be the only or even the best way, however, as transmis-sion lines cost a lot of money, take considerable time to build, and are subject to lengthy permit pro-cedures and environmental constraints. With SVC and STATCOM , the power transmission capability of lines can be increased considerably.

high power thyristor technology, appeared in the field in the 1970s. STATCOM, based on GTO (Gate ... the reactive power output needs to be controllable more or less independent of the AC system voltage, or a speed of response ... • Boosting voltage during under-voltage distur -

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