Micro grid stabilization using the Virtual Synchronous Machine (VISMA)

Up to now, the electromechanical synchronous machine rules the domain of electrical power generation devices and that way the public power grids. Its specific characteristics guarantee the stable highly parallel grid operation, automatic power balancing and damping. Not least the rotating mass is related to some dynamic properties and the condition for the grid short time frequency stability. The progressive integration of renewable sources is accompanied by questions concerning the loss of these features using inverters for grid feeding. The paper shows an approved concept that combines inverter technology and synchronous machine properties.