This paper presents a reduction method of common mode voltage for parallel connected inverters applied model predictive control
algorithm with subdivided voltage vector.
The energy storage system (ESS) using parallel connected inverters can extend
of total system. In order to control the
parallel connected inverters of the ESS, the MPC algorithm with subdivided
voltage vector can
be used. It has various voltage vectors
unlike the conventional MPC algorithm using the limited number of voltage
it is improved quality of grid currents.
However, the common mode voltage (CMV) is generated during its operation. Since
causes various problems, a number of
literatures have studied about reduction methods of the CMV. However, those
increased the total harmonic distortion
(THD) of the grid currents. In this paper, the reduction method of the CMV for
parallel using the model predictive
control (MPC) algorithm with subdivided voltage vector is proposed. Through the
of each inverter, the CMV is reduced in
parallel connected inverters. The validity of the proposed reduction method is
simulation and experimental results.
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