Implementation of Virtual Synchronous Machine (VSM) Method on Inverters
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2017, Vol 5, Issue 5
Abstract
Virtual Synchronous Machine (VSM) [1] is a control algorithm to make an inverter operated as a conventional electromechanical synchronous machine. It is a promising solution to overcome the problems of the grid stability and quality, which have been exacerbated by increasing integration of distributed generation units into the grid. Compared to the conventional power plants, in which the synchronous machine dominate, the distributed generation units have either significantly smaller or no rotating mass and damping effect. These weaknesses can be compensated by using the VSM concept and thus the power system quality will be improved. Furthermore, the penetration level of the DG sources won’t be restricted any more. Up to now the VSM was implemented by using a voltage-to current model on a hysteresis controlled inverter [1][2][3]. This method will be called VSM -Method 1 here. Since the most products of inverters in the market are PWM controlled, the VSM - Method 1 cannot be easily applied on these inverters. Therefore, a new method is developed to implement the VSM by using a current-to-voltage model on the currently widely applied PWM controlled inverter. This new method is called VSM -Method 2 in this paper and will be compared with the VSM -Method 1 by simulation results.
Authors and Affiliations
Hima Kiran Kumar Oleti, Thummala Srinivasa Rao, D. Subba Rao
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