New Control Algorithms for The Distributed Generation Interface (Paperback)

New control algorithms for the distributed generation (DG) interface are presented in this book. The proposed control algorithms are designed to realize a robust interface that guarantees plug- and-play integration and robust operation under the challenging uncertain nature of distribution systems and micro-grid operation mode. The control architecture of the proposed interface relies on the following subsystems: 1) a newly designed deadbeat current regulation scheme; 2) an adaptive discrete- time grid-voltage sensorless interfacing scheme; 3) a robust voltage control scheme featuring fast load voltage regulation and effective mitigation of fast voltage disturbances; and 4) a transient-based droop controller with adaptive transient-gains to constrain the drift of the low frequency modes in a conventional droop-controlled micro-grid. The overall robust DG interface facilitates a robust micro-grid operation and safe plug-and-play integration of DG units on existing distribution systems.