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Small-signal stability in balanced three-phase systems is typically investigated by means of the generalized Nyquist stability criterion (GNC) that involves operations on the source and load subsystems’ impedance matrices. Eigenvalues of the ratio of these impedance matrices should be calculated for stability judgment. This paper shows that for a power-electronics-based distributed power system, impedance...
In residential micro-grids, the distributed energy resources are interfaced with the grid by electronic power processors. If these processors perform cooperatively, full exploitation of energy sources can be achieved together with distribution loss reduction and voltage stabilization. The paper shows that this is possible without central controllers, by taking advantage of the local measurement, communication...
Smart micro-grids offer a new and wide application domain for power electronics. In fact, every distributed energy resource (DER) includes an electronic power processor (EPP) to control the power exchange with the grid. If such distributed EPPs perform cooperatively, they have the capability to fully exploit all renewable power sources and energy storage units while improving the power quality and...
This paper discusses the implementation of an equivalent resistive-reactive load for the optimum energy harvesting from vibration sources. In photovoltaic applications, the converter impedance that ensures the maximum power is real and the Maximum Power Point Tracker (MPPT) uses a single variable optimization algorithm (resistive load matching). The piezoelectric generator, instead, is characterized...
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