Open Access
ARTICLE
Hybrid Modulation Strategy For Reactive Compensation Of PV GridConnected Inverter
Liao Tian-fa
School of Electronic information and Electronical Engineering, Huizhou University, Huizhou, Guangdong, 516007, China
* Corresponding Author: Liao Tian-fa,
Intelligent Automation & Soft Computing 2019, 25(4), 695-704. https://doi.org/10.31209/2019.100000073
Abstract
With the spreading of Photovoltaic (PV) grid-connected system, grid-connected
reactive-load compensation and harmonic control is becoming a research focus.
Unipolar and bipolar modulations are widely used in active power filter of PV
grid-connected inverter. Unipolar modulation is good at harmonic, ripples and
efficiency control, while bipolar modulation is good at grid-connected current
control. A comprehensive comparison between the aforementioned modulation
strategies in aspects of basic switching action, effects on operation mode,
current harmonics,efficiency, is done in this paper. Base on it, a hybrid
modulation strategy with the fusion of the unipolar and bipolar modulation is
proposed in this paper. Numerical and experimental results show the lowest
total harmonic distortion, and enhanced zero passage control are achieved by
the proposed method, providing a reliable and efficient control strategy for PV
grid connecting.
Keywords
Cite This Article
L. Tian-fa, "Hybrid modulation strategy for reactive compensation of pv gridconnected inverter,"
Intelligent Automation & Soft Computing, vol. 25, no.4, pp. 695–704, 2019. https://doi.org/10.31209/2019.100000073