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Model predictive control approach for frequency and voltage control of standalone micro-grid

Model predictive control approach for frequency and voltage control of standalone micro-grid

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The frequency and voltage control of a standalone micro-grid with synchronous generator-based distributed generator and electronically interfaced generator is discussed. A centralised linear model predictive controller is employed. The controller design is based on the state space model of the micro-grid. To decrease the number of optimising variables and calculation time of optimal control trajectory, the design of the controller is realised with the help of orthonormal Laguerre polynomials. The numerical instabilities that arise during implementation and the possible ways to overcome them are discussed. The impact of different generator constraints on the controller operation is discussed. Formulation of the micro-grid model and identifying the appropriate inputs and outputs to the controller is discussed in detail with the help of an eight bus micro-grid.

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