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Article

H loop-shaping controller design for a grid-connected single-phase photovoltaic system

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Pages 196-204 | Received 19 Oct 2016, Accepted 13 Feb 2018, Published online: 12 Mar 2018
 

Abstract

This paper presents a H loop-shaping controller for controlling dc-link voltage by regulating the switching signal of the inverter associated with a grid-connected single-phase photovoltaic system. To facilitate a robust control design, state-space realisation of the system model is made with uncertainties represented by linear fractional transformation. The controller is achieved through H synthesis followed by obtaining desired loop shapes through the choice of the proper weighting functions. The controller order is reduced by Henkel-norm method for facilitating its practical implementation. Controller performance is evaluated through carrying out simulations on MATLAB/Simulink platform under standard and changing atmospheric conditions, and fault condition.

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