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Robust decentralized voltage control of an islanded microgrid under unbalanced and nonlinear load conditions

Emamian, S ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. DOI: 10.1109/ICIT.2013.6505953
  3. Publisher: 2013
  4. Abstract:
  5. This paper presents a new decentralized control strategy for the islanded operation of a microgrid under unknown load conditions. In the islanded mode of operation, the microgrid should provide the load with a set of regulated balanced three-phase voltages. The load which is parametrically and topologically uncertain can also be unbalanced and/or nonlinear. Thus, the use of conventional control strategies results in the poor performance and even instability of the microgrid system. The proposed method assumes that the load current is a measurable disturbance signal. The robust optimal control approaches are used to design a controller to overcome the disturbances resulting from the unknown loads dynamics. The optimization problem is converted to a convex problem and is solved using the linear matrix inequalities (LMIs). The performance of the designed controller is verified using time-domain simulations carried out in PSCAD/EMTDC software
  6. Keywords:
  7. Conventional control ; Disturbance signals ; Islanded mode of operations ; Linear matrix inequality (LMIs) ; Optimization problems ; Robust optimal control ; Three-phase voltages ; Time-domain simulations ; Time domain analysis ; Linear matrix inequalities
  8. Source: Proceedings of the IEEE International Conference on Industrial Technology, Cape Town, South Africa ; Feb , 2013 , Pages 1825-1830 ; 9781467345699 (ISBN)
  9. URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6505953