Distributed coordination control of hybrid energy resources for power sharing in coupled hybrid DC/AC microgrid using paralleled IFCs/ILCs. Issue 1 (24th January 2019)

• Record Type: Journal Article
• Authors: Agrawal, Alok; Gupta, Rajesh
• Is Part Of: IET smart grid. Volume 2:Issue 1(2019)
• Page Start: 89
• Page End: 105
• Publication Date: 2019-01-24
• Subjects: distributed power generation -- load flow -- power distribution control -- bridge circuits -- voltage control -- DC‐AC power convertors -- power grids -- power convertors -- power generation control -- DC‐DC power convertors -- battery powered vehicles -- AC‐DC power convertors; HMG system performance -- distributed coordination control -- hybrid energy resources -- power sharing -- coupled hybrid DC/AC microgrid -- paralleled IFCs/ILCs -- flexible controllers -- ILC -- interfacing converters -- coupled hybrid AC/DC microgrids -- multiple stacked bidirectional DC–AC ILCs/IFCs -- microgrid outlays -- droop power flow -- wide‐spread AC/DC bus parameters control -- superfluous power -- controller parameter tuning -- conventional controllers -- zonal HMG systems -- wider operating conditions -- higher‐order PLL integrated PQ -- dq 0 control algorithms -- centralised battery energy stack -- bidirectional dual active bridge DC–DC converter -- high‐power transfer efficiency -- low‐voltage DC buses; B8360 Power convertors and power supplies to apparatus -- C3340H Control of electric power systems -- B8120K Distributed power generation; Smart power grids -- Periodicals; Computer science -- Periodicals; Energy industries -- Periodicals; Broadcasting -- Periodicals; 333.79110285
• DOI: 10.1049/iet-stg.2018.0165
• Languages: English
• ISSNs: 2515-2947

Abstract

Abstract : This study proposes flexible controllers for the interlinking converter (ILC) and interfacing converters (IFCs) used in coupled hybrid AC/DC microgrids (HMGs). Proposed controllers are specifically designed for the multiple stacked bidirectional DC–AC ILCs/IFCs based microgrid outlays, to omit the droop power flow and system stability issues. The ILC and IFC grid supportive converter controllers focus on the wide‐spread AC/DC bus parameters control for both DC and AC bus voltage regulation and superfluous power sharing while operating in the grid forming and feeding modes. Proposed controllers minimise the need for the controller parameter tuning as opposed to the conventional controllers used in zonal HMG systems. This makes the system stable for a much wider operating conditions as opposed to the widely used higher‐order PLL integrated PQ and dq 0 control algorithms. The proposed HMG also integrates the centralised battery energy stack through bidirectional dual active bridge DC–DC converter for achieving the high‐power transfer efficiency and omitting the isolation issues between medium‐voltage and low‐voltage DC buses. The HMG system performance is evaluated using the simulation studies for various strategical operational modes. Further, the proposed controllers have also been tested individually on experimental platform.