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In recent years, the concept of multi-inverter microgrid as the building block for the future distribution system has been commonly accepted and widely studied in literature. One of the recognized advantages of microgrids is the possibility of operate autonomously in absence of the main utility supply. In this case, droop control techniques are the most attractive solution for their capability of...
Cooperative control of distributed energy resources can improve dramatically the operation of residential microgrids, in terms of voltage stability, distribution efficiency and power quality, while allowing cost-effective management and sharing of energy resources among prosumers (electric customers which produce and consume energy). This paper describes an optimum control technique which provides...
This paper presents a state-feedback model to predict the frequency behavior of the grid-interface converter which uses phase-locked loop (PLL) techniques to synchronize with the grid. The frequency positive-feedback mechanism in the converter system is proposed and quantified in the model. The nonlinear behavior of the PLL under the weak grid condition can be accurately predicted and the large-signal...
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