Local adaptive pinning synchronisation for distributed secondary control of islanded microgrid. Issue 8 (14th February 2020)

• Record Type: Journal Article
• Authors: Gong, Pingping; Lu, Ziguang; Lv, Zhilin
• Is Part Of: IET generation, transmission & distribution. Volume 14:Issue 8(2020)
• Page Start: 1476
• Page End: 1482
• Publication Date: 2020-02-14
• Subjects: control system synthesis -- power generation control -- synchronisation -- network theory (graphs) -- energy management systems -- complex networks -- adaptive control -- distributed power generation -- invertors -- distributed control -- power distribution faults -- eigenvalues and eigenfunctions -- matrix algebra; coupling weight gains -- fully distributed complex network -- local adaptive pinning algorithm -- consensus controller design -- Laplacian matrix -- communication network -- global information -- adaptive pinning control scheme -- local adaptive pinning synchronisation -- islanded microgrid -- distributed secondary control method‐based adaptive pinning control -- isolated microgrid structure -- voltage compensation -- energy management system -- local DG controllers; Electric power production -- Periodicals; Electric power transmission -- Periodicals; Electric power distribution -- Periodicals; 621.3105
• DOI: 10.1049/iet-gtd.2019.1350
• Languages: English
• ISSNs: 1751-8687

Abstract

Abstract : This study introduces a distributed secondary control method‐based adaptive pinning control for inverter‐based distributed generations (DGs) in an isolated microgrid (MG) structure with frequency and voltage compensation and power sharing. Without MG centre controller or energy management system, local DGs' controllers have no global information of the whole communication network, which is the second smallest eigenvalue of the Laplacian matrix. In practice, the large coupling weight gains are mostly selected. However, a sufficient large coupling weight may cause instability. It is difficult to choose the coupling weight in the fully distributed complex network. To solve the above problems, the authors investigate a pinning control for synchronisation using the local adaptive pinning algorithm on coupling weight gains. The proposed method has the advantage that the consensus controller design is independent of the Laplacian matrix associated with the communication network. And the collective dynamics of the communication network can be adjusted to steady states without global information. However, the adaptive pinning control scheme is not suitable for the multi‐disturbance situation, which will accumulate the coupling weight and even cause integral saturation. Therefore, an improved strategy is proposed to adapt to the load changing conditions for islanded MGs.