Publication

An adaptive disturbance rejection control scheme for voltage regulation in DC micro-grids

Conference Article

Conference

IEEE International Conference on Industrial Technology (ICIT)

Edition

20th

File

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Abstract

Abstract—Uncertain generation by renewable sources and load variations have resulted in adding energy storage systems in the grid to maintain grid parameters (voltage, frequency) within prescribed limits. The disturbances being non-deterministic in nature, the voltage regulation control by the storage systems relies mostly on dual loop architecture with an outer voltage and inner current loop. Improvement in controller dynamics can be achieved through feed forward of disturbance profile but at expense of additional sensors and communication in the grid. This work explores the application of an adaptive disturbance rejection control scheme for disturbance estimation (without using additional sensors) employing an extended state and proportional integral observer (PI+ESO). The proposed observer aim to achieve robust disturbance estimation under grid parameter uncertainty. The effectiveness of the proposed scheme over the conventional one will be put forward through H and H2 norm analysis of the system. The design and simulation results of the proposed scheme will be presented in this work.

Categories

model reference adaptive control systems.

Author keywords

state estimation, grid compensation and control, storage systems control.

Scientific reference

U. Raveendran Nair, R. Costa Castelló and German A. Ramos. An adaptive disturbance rejection control scheme for voltage regulation in DC micro-grids, 20th IEEE International Conference on Industrial Technology, 2019, Melbourne, Australia, IEEE, to appear.