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The grid-connected photovoltaic (PV) power generation is expected to be more widespread and paid more attention. In order to suppress the high-frequency harmonic current of PV grid-connected inverters, LCL filter is utilized to lower the current total harmonic distortion rate. On the basis of LCL filter, double-loop current control scheme with the quasi proportional-resonant method is designed. The...
In distributed generation(DG)unions, the requirements of inverter could be operated in island mode as a voltage source, which could also be operated in grid-tied mode as a current source. When the inverter transfer between the two modes, which may arouse spike of the voltage and current. This paper analyzed the features of inverter in voltage control mode and current control mode, respectively, and...
When filters are applied to digitally controlled grid-connected inverters, the design of controllers is usually implemented using classic average models. The accuracy of these models in -domain is only guaranteed in low-frequency range. In order to predict the dynamic behaviors, new small-signal -domain models are deduced for digitally controlled grid-connected inverters with converter current...
In order to improve the performance at steady state of a three-phase drive system, numerous works have been focused in reducing the current and torque ripple. Predictive current control allows the improvement of the performance by increasing the sampling frequency, but the resulting switching frequency can generate semiconductors operating point out of their thermal limits. The ripple of current using...
Today, it is common the use of a static power converters to adapt the available energy from a clean source to feed an electrical load. Wind energy conversion systems have become one of the principal areas of research on renewable energies. This research has permitted the development of different topologies and control strategies of power converters to be used on wind energy extraction. This paper...
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