Distributed secondary control based on cluster consensus of inhibitory coupling with power limit for isolated multi‐microgrid. Issue 18 (9th September 2019)

• Record Type: Journal Article
• Authors: Gong, Pingping; Lu, Ziguang; Lin, Jingyu; Lv, Zhilin; Hu, Likun
• Is Part Of: IET generation, transmission & distribution. Volume 13:Issue 18(2019)
• Page Start: 4114
• Page End: 4122
• Publication Date: 2019-09-09
• Subjects: power generation control -- reactive power -- power distribution control -- distributed power generation -- distributed control -- power generation reliability -- power system security -- reactive power control; cluster consensus -- power limit scheme -- inter‐cluster communication coupling structure -- communication channels -- network topology -- control dimensions -- multivalued consensus states -- MG cluster -- inhibitory coupling configuration -- distributed generator -- adaptive virtual impedance control -- distributed secondary control -- isolated multimicrogrid -- multiple nearby isolated microgrids -- multiMGs -- MMGs -- multilayer control structure -- complex communication network -- active‐reactive power sharing -- communication delays -- reliability‐security -- inhibitory coupling -- active‐reactive power overloading -- high local autonomy -- voltage deviations -- Matlab‐Simulink -- power supply investment cost reduction; Electric power production -- Periodicals; Electric power transmission -- Periodicals; Electric power distribution -- Periodicals; 621.3105
• DOI: 10.1049/iet-gtd.2018.6688
• Languages: English
• ISSNs: 1751-8687

Abstract

Abstract : Multiple nearby isolated microgrids (MGs) can be interconnected to become multi‐MGs (MMGs) and meet larger bulk power demands, thus improving reliability/security of MMGs and reducing the power supply investment costs. However, a multi‐layer control structure and complex communication network are inevitable, which increase communication delays and complicate the control structure. To solve this problem, this article introduces a distributed secondary control (DSC) based on cluster consensus of inhibitory coupling with a power limit scheme. Compared with an inter‐cluster communication coupling structure, the communication channels of the proposed scheme are minimised to simplify network topology, decrease the communication delays and control dimensions. The proposed control strategy reaches multi‐valued consensus states for accurate active/reactive power sharing in different MGs. Furthermore, active/reactive power overloading in a MG cluster is discussed under an inhibitory coupling configuration. Based on the power limit scheme, each distributed generator (DG) of the overloaded MG is controlled to generate power within the rated power range for high local autonomy. In addition, an adaptive virtual impedance control is introduced to decrease voltage deviations between DGs. The analytical results are verified by a simulation in MATLAB/Simulink.