Simulation of PV Grid-connected Inverter Based on PSCAD

In order to study the supraharmonic transmission and propagation characteristics of photovoltaic grid-connected inverter, a more accurate model of photovoltaic grid-connected inverter was proposed based on PSCAD simulation software. Firstly, the model of the photovoltaic system is built. Secondly, the inverter control method suitable for dynamic analysis of grid connection is modeled, and the voltage and current double loop control strategy is adopted to realize the decoupling control of active and reactive power. Finally, a simulation model was built and the influence of the main parameters of the photovoltaic system, such as illumination, temperature and switching frequency, on the level of the supraharmonic emitted by it was analyzed. And then the correctness of the model is verified by comparison with the field measured data. The model provides an effective simulation platform for verifying the superaharmonic current and voltage emissions of photovoltaic grid-connected inverters under working conditions.