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The power electronics interfaces of distributed generation units in microgrids usually employ droop control for defining their active and reactive power injections. The voltage and current control loops can be implemented in different ways, presenting different degrees of complexity and resulting performance, in terms of harmonic distortion and voltage regulation in steady-state and transient conditions...
This paper investigates the use of a virtual synchronous machine (VSM) to support dynamic frequency control in a diesel-hybrid autonomous power system. The proposed VSM entails controlling the grid-interface converter of an energy storage system (ESS) to emulate the inertial response and the damping power of a synchronous generator. In addition, self-tuning algorithms are used to continuously search...
Hybrid mini-grids usually employ diesel generator sets (gensets) as grid forming units in three-phase four-wire systems. The impact of unbalances in power demand (load) and renewable power injection on the power quality is relatively small due to the also small output impedance of the rotating generators. However, when a battery inverter is required to form the grid, the power quality can deteriorate...
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