Detailed analysis of a multi-pulse STATCOM

The rapid development of power electronics technology provides opportunities to develop new power equipment to improve the performance of the actual power systems. During the last decade, a number of control devices called ”Flexible AC Transmission Systems ” (FACTS) technology have been proposed and imple-mented. FACTS devices can be used for power flow control, loop-flow control, voltage regulation, enhancement of transient stability and damping of power os-cillations. FACTS devices can be used as a series controller, shunt controllers or by a combination of both. Since the early 1970s high power, line-commutated thyristors in conjunction with capacitors and reactors have been employed in various circuit configurations to produce variable output such as the shunt connected static VAR compensators (SVC) and the series connected thyristor controlled series capacitor (TCSC), based on the traditional thyristor-switched capacitors (TSC) and thyristor-controlled re-actors (TCR), which have been widely used for the AC voltage regulation in powe