The Micro Grid concept has the potential to solve major problems arising from large penetration of distributed generation in distribution systems. A Micro Grid is not a robust system when compared to a power system. Therefore, proper control strategies should be implemented for a successful operation of a Micro Grid. This paper proposes the use of a central controller for the improvement of the dynamic voltage profile in a Micro Grid. The associated controller is termed as a Micro Grid Voltage Controller (MGVC). The MGVC is a secondary level voltage controller implemented in a Micro Grid test system. A dynamic simulation of the test system is carried out for the cases of with and without the MGVC for various disturbances. Both grid-connected and islanded modes of operation are considered. Results show that, with the addition of MGVC, the dynamic voltage profile of the Micro Grid system, especially at the load buses, will be improved.