Particle Swarm Optimization of PI Controllers in Grid-Connected PV Conversion Cascade Based Three Levels NPC Inverter
2020 IEEE International Conference on Environment and Electrical Engineering and 2020 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe)(2020)
Abstract
In this paper, the application of the Particle Swarm Optimization (PSO) method to proportional integral regulators of two-stage photovoltaic power conversion systems is presented. The photovoltaic generator is connected to a boost converter controlled by Maximum Power Point Tracking (MPPT) fuzzy logic regulator. The three-phase three-level inverter constituting the second stage of studied cascade is controlled by the vector pulse width modulation strategy. To be able to synchronize the injected current and the grid voltage, a phase-locked loop is used. Three PI regulators are used to regulate the DC bus voltage as well as the grid currents obtained after transformation in rotating dq-reference frame. The parameters of the regulators used are determined by the particle swarm optimization method.
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Key words
PSO,PI,Grid connected,Three-level inverter,Photovoltaic generator
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