Modified particle swarm optimisation-based maximum power point tracking controller for single-stage utility-scale photovoltaic system with reactive power injection capability

Modified particle swarm optimisation-based maximum power point tracking controller for single-stage utility-scale photovoltaic system with reactive power injection capability

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In this study, the control objectives such as maximum power point tracking (MPPT), synchronisation with grid and current control are realised for single-stage utility-scale photovoltaic (PV) system which is also capable of injecting the reactive power into the grid. For utility-scale PV system, the single-stage scheme is used for high efficiency and simple power converter topology. The proposed MPPT approach utilising a modified particle swarm optimisation method is interrelated with other control schemes. The MPP changes with variation in solar irradiation and temperature. Also, the PV power characteristic of large system is characterised by multiple peaks under partial shaded condition. The conventional methods such as hill climbing and incremental conductance methods do not work properly in these conditions. The proposed method is suitable to all conditions with reduced steady-state fluctuations. The overall system is simulated in PSCAD and the effectiveness of the proposed method is tested on various conditions.


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