Author(s)

Chao Li, Xiaoping Chen, Keke Ren and Na Wang

Corresponding Author

Chao Li

ABSTRACT

In recent years, China's demand for electrical energy has been increasing, and power grid construction is increasing.Based on the principle of photovoltaic power generation and its mathematical model, this paper analyzes and studies the circuit model of photovoltaic inverter with LCLfilter, and sets reasonable parameters according to the derivation formula of filter parameters.Aiming at the resonance problem of LCLtype photovoltaic grid-connected inverter, the damping control strategy of capacitor branch series resistor is selected.Finally, simulations were carried out with MATLAB/simulink, and they were verified to have good resonance suppression effects from the grid-connected current and voltage waveform quality.

KEYWORDS

LCLfilter, photovoltaic grid-connected, harmonic suppression