218027 ⎘
Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means arranged for operation in parallel
Power transmission via a bipolar high-voltage DC transmission link
#2Uninterruptible power supply system and uninterruptible power supply
#3Power conversion system
#4Devices and methods for controlling current in inverters
#5Controlling parallel converter systems for wind turbines
#6Transformer tap-changing circuit and method of making same
#7Bi-directional energy conversion system