Research on the use of passive filters for PV grids to reduce harmonics

Tóm tắt

Energy generated by photovoltaic (PV) systems is increasingly seen as an alternative to increasingly scarce fossil fuels. However, renewable energy systems pose many challenges and have many parameters that need to be connected to the grid. An LCL filter will help the system filter out high harmonics optimally, but it is disadvantaged by the filter’s own resonant frequency. Confronting these challenges, this paper presents “research on the use of passive filters for PV grids to reduce harmonics” system using passive LCL dampers in series and parallel. The system is modeled using Matlab Simulink, and any radiation intensity and temperature of 25°C always gives stable power. The results show that the LCL resonator with parallel passive damping, combined with the virtual resistor active damping filter circuit applied to the system, achieves the best results for harmonic filtering for gridconnected renewable energy systems.