On stability enhancing control methods in power electronic converters

The widespread usage of distributed power systems (DPS) in power delivery schemes has necessitated the reorientation of converter design from a stand-alone process to a system dependent design process. System stability and subsystem interaction issues are of prime importance in distributed power systems. Control methods for power electronic converters that enhance the stability boundaries of operation and ensure safe operation of the system without subsystem interactions are surveyed in this paper. Controllers for standard feedback converters, cascaded converters, parallel converters and their limitations are presented. Compensation schemes to counteract the interactions caused by input filters used to reduce electromagnetic interference (EMI) are also discussed