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Larger percentages of wind power penetration\ud translate to more demanding requirements from grid codes.\ud Recently, voltage support at the point of connection has been\ud introduced by several grid codes from around the world, thus,\ud making it important to analyze this control when applied to wind\ud power plants.\ud This paper addresses the analysis of two different voltage\ud control strategies for a wind power plant, i.e. decentralized and\ud centralized voltage control schemes.\ud The analysis has been performed using the equivalent and\ud simplified transfer functions of the system. Using this\ud representation, it is possible to investigate the influence of the\ud plant control gain, short circuit ratio, and time delays on the\ud system stability, as well as the fulfillment of the design\ud requirements.Peer ReviewedPostprint (published version

Modern wind power plants are required and\ud designed to ride through faults in the network, subjected to the\ud fault clearance and following grid code demands. Beside voltage\ud support during faults, the wind turbine fault current\ud contribution is important to establish the correct settings for the\ud relay of the protections. The following wind turbine generator during faults have been\ud studied: (i) induction generator, (ii) induction generator with\ud variable rotor resistance (iii) converter-fed rotor (often referred\ud to as DFIG) and (iv) full scale converter.\ud To make a clear comparison and performance analysis during\ud faults, and the consequent effects on substation protections, the\ud aforementioned configurations have been simulated using\ud PSCAD/EMTDC, with the same power plant configuration,\ud electrical grid and generator data.Peer ReviewedPostprint (published version

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