Abstract:
Z source inverters (ZSI) can perform single stage,
buck-boost conversion and have shown to offer slightly higher
efficiency over traditional inverters. However, ZSI controller
unit becomes more complex when achieving all objectives of
Grid connected solar inverter applications where Maximum
Power Point Tracking (MPPT), grid synchronization and
harmonic reduction from output voltage and current are
simultaneously implemented. The control concept used to
achieve above objectives is that varying shoot through duty of
ZSI while keeping peak DC link voltage at a constant value.
Control structure is designed in synchronous reference frame
with two cascaded loops as outer voltage control loop and inner
current control loop to maintain power balance of ZSI which
results constant peak DC voltage. Besides that, incremental
conductance algorithm sets shoot through duty of ZSI to extract
maximum power from solar panel at a given irradiance and
temperature level. In this paper we present a simulation study
of a grid connected ZSI along with Incremental Conductance
MPPT method. The details of theory, operation, design and
simulation results are included in the paper.
Citation:
Jayasundara, D.Y.M., Karunarathne, A.M.G.T., Edirisooriya, H.P.U.D., Jayasiri, L.K.N., Hemapala, K.T.M.U., Karunadasa, J.P., & Lakshika, K.A.H. (2018). Simulation performance of grid connected Z source solar inverter with incremental conductance mppt. In R. Samarasinghe & S. Abeygunawardana (Eds.), Proceedings of 2nd International Conference on Electrical Engineering 2018 (pp. 26-31). Institute of Electrical and Electronics Engineers, Inc. https://ieeexplore.ieee.org/xpl/conhome/8528200/proceeding
