Title :
Preventing instability in DC distribution systems by using power buffering
Author :
Logue, Daniel L. ; Krein, Philip T.
Author_Institution :
Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA
fDate :
6/23/1905 12:00:00 AM
Abstract :
Negative incremental impedance of regulated converter loads can cause stability problems in distributed DC power systems. Since the load-side converters usually contain energy storage elements, it is possible to avoid instability through transient control of the load-side converter input impedance. In this paper, bus-side stability is used as a control constraint. It is shown that load-side converter control-loop gain can be modified to improve stability characteristics, or even actively controlled to meet given impedance specifications
Keywords :
DC-DC power convertors; buffer circuits; capacitors; electric impedance; electric variables control; power distribution control; DC distribution systems instability prevention; DC-DC converter; Power Buffering; active control; bus-side stability; capacitor; converter control-loop gain; energy storage elements; load-side converter input impedance control; load-side converters; negative incremental impedance; regulated converter loads; stability problems; transient control; Capacitors; DC-DC power converters; Energy storage; Impedance; Inverters; Power system dynamics; Power system stability; Power system transients; Rectifiers; Telecommunication control;
Conference_Titel :
Power Electronics Specialists Conference, 2001. PESC. 2001 IEEE 32nd Annual
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-7067-8
DOI :
10.1109/PESC.2001.953991
