Title :
Modelling of power electronic loads in AC distribution systems using the generalized state space averaging method
Author_Institution :
Dept. of Electr. & Comput. Eng., Illinois Inst. of Technol., Chicago, IL, USA
Abstract :
Most of the loads in AC distribution systems have positive incremental impedance characteristic. However, power electronic loads, when tightly regulated, sink constant power from the system. Therefore, they have negative incremental impedance characteristic. This can even cause negative impedance instability. Power electronic loads usually have a controlled or uncontrolled rectifier at the front end. In this paper, these loads are modelled using the generalized state space averaging method. An assessment of their effects in AC distribution systems is also presented
Keywords :
distribution networks; electric impedance; load (electric); power electronics; rectifying circuits; state-space methods; AC distribution systems; controlled rectifier; generalized state space averaging method; negative impedance instability; negative incremental impedance; positive incremental impedance characteristic; power electronic loads; power electronic loads modelling; three-phase AC distribution systems; uncontrolled rectifier; Equivalent circuits; Impedance; Load modeling; Motor drives; Power electronics; Power system dynamics; Power system modeling; Power system stability; State-space methods; Voltage;
Conference_Titel :
Industrial Electronics Society, 2001. IECON '01. The 27th Annual Conference of the IEEE
Conference_Location :
Denver, CO
Print_ISBN :
0-7803-7108-9
DOI :
10.1109/IECON.2001.975912
