Title :
Multimodular multilevel rectifier/inverter link with independent reactive power control
Author :
Chen, Yiqiang ; Ooi, Boon-Teck
Author_Institution :
Dept. of Electr. Eng., McGill Univ., Montreal, Que., Canada
fDate :
7/1/1998 12:00:00 AM
Abstract :
The feasibility of a DC link made up of multimodular, diode-clamped multilevel power converters to form the rectifier and the inverter has been studied in this paper. Equalization of the DC capacitor voltages is accomplished by auxiliary DC choppers sized at 10% of the current ratings. Real power control makes use of voltage angles as the control levers. Independent reactive power control on both sides makes use of voltage magnitude control. Digital simulations demonstrate the success of local controls. As the rectifier/inverter link plays a pivotal role in the unified power flow controller (UPFC) and the asynchronous DC link, the study has shown that multimodular multilevel versions of these FACTS controllers are feasible
Keywords :
AC-DC power convertors; DC-AC power convertors; choppers (circuits); control system analysis computing; control system synthesis; flexible AC transmission systems; invertors; load flow; power system analysis computing; power system control; reactive power control; rectifying circuits; DC capacitor voltages equalisation; FACTS controllers; asynchronous DC link; auxiliary DC choppers; control levers; current ratings; digital simulation; independent reactive power control; multimodular multilevel rectifier/inverter link; real power control; unified power flow controller; voltage angles; Capacitors; Choppers; Digital simulation; Diodes; Inverters; Load flow; Power control; Reactive power control; Rectifiers; Voltage control;
Journal_Title :
Power Delivery, IEEE Transactions on
