Title :
A method to extend the low frequency operation of load commutated inverters
Author :
Hess, Herbert L. ; Divan, Deepakraj M.
Author_Institution :
Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA
Abstract :
A novel method for extending the range of thyristor-based load-commutated inverters (LCIs) is proposed. Using conventional single- and three phase LCI topologies, voltage and current waveforms are generated containing a dominant higher-frequency (leading power factor) switching component. A lower-frequency load component is concurrently produced, enabling an LCI to supply lagging power factor and even DC loads. A state-space model is used to apply methods of optimal control in order to improve three-phase LCI operation. Both simulation and experimental results are presented.<>
Keywords :
commutation; invertors; optimal control; power control; state-space methods; switching; thyristor applications; LCI; current; load commutated inverters; low frequency operation; optimal control; power control; power factor; single-phase; state-space model; switching; three phase; thyristor applications; voltage; Capacitance; Capacitors; Commutation; Inverters; Power generation; Reactive power; Switching frequency; Synchronous machines; Thyristors; Voltage;
Conference_Titel :
Power Electronics Specialists Conference, 1990. PESC '90 Record., 21st Annual IEEE
Conference_Location :
San Antonio, TX, USA
DOI :
10.1109/PESC.1990.131224
