Abstract
In this paper, control schemes of utility interactive Multifunctional Dispersed Generation (MDG) are proposed to improve the power quality and the continuity of the electric power supply. The proposed MDG is designed to compensate the power quality event, for example, voltage sag and harmonic distortion, and to supply electric power in parallel operation with power gird. It is also designed to serve a local load for improving the power quality and the continuity of the electric power supply when it is isolated from the power gird. To cope well with this, the instantaneous power theory is used to control the series and shunt DC/AC inverter of the MDG. A numerical formulation of the proposed control scheme is presented. Case study shows the effectiveness and flexibility of the proposed control schemes of the proposed MDG configuration for the multifunctional purpose.
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