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Robust decomposition and structured control of an islanded multi-DG microgrid

Babazadeh, M ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1109/TSG.2018.2798617
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2018
  4. Abstract:
  5. This paper presents a new robust control strategy for islanded operation of a microgrid consisting of several distributed generation (DG) units with arbitrary topology. Each DG unit is connected to its local load through a voltage-source converter (VSC), a series RL filter and a step-up transformer. The multi-DG microgrid with arbitrary connectivity graph is modeled as a linear time-invariant (LTI) system subject to a parametric, norm-bounded uncertain block. By utilizing the developed model for multi-DG microgrids, a systematic approach for the design of structured dynamic output feedback control is proposed. A convex optimization problem is developed which yields a low-order dynamic controller of arbitrary structure such that the microgrid channels are all decoupled at the presence of load parameter uncertainties. Simulation case studies performed in MATLAB/SimPowerSystems Toolbox verify the performance of the proposed strategy. IEEE
  6. Keywords:
  7. DG ; LMI ; Mathematical model ; Microgrids ; Robust decomposition ; Robustness ; Structured control ; Convex optimization ; Mathematical models ; MATLAB ; Optimization ; Robustness (control systems) ; Uncertain systems ; Uncertainty analysis ; Convex optimization problems ; Distributed generation units ; Dynamic output feedback control ; Islanded microgrid ; Linear time-invariant system ; Load modeling ; Micro grid ; Uncertainty ; Robust control
  8. Source: IEEE Transactions on Smart Grid ; 2018 ; 19493053 (ISSN)
  9. URL: https://ieeexplore.ieee.org/document/8270585