A New Dc-Side Current Injection Method For Improving Ac Line Condition Applied In The 18-Pulse Converter System
In this dissertation, a innovative compensation strategy designed for receiving clean power of a usual 18-pulse
ac/dc converter created by three 6-diode bridges is anticipated According to the future plan, a three-phase current-controlled
inverter injects the compensation currents addicted to the three positive terminals of the three six diode bridges. The aim of
injecting currents by the side of dc side is to improve the quality of the ac line currents. Compared toward the usual active
ﬁlter deployed at the ac side, the three-phase inverter used in this dissertation is with lower kVA rating, and the 18-pulse
converter draws nearly sinusoidal currents from the ac main by the proposed compensation strategy.