Analysis and Modeling of Droop Control in Micro-Source for Islanded Micro-Grid
2014
Considering decentralization of the micro-source units and loads in the micro-grid and concentrating on generation types and models of the storage devices, droop control strategy is used in controller design for the distributed generation units. The generation units adopting droop control method based on the droop characteristics can facilitate load power sharing when the powers of loads vary, and can also maintain the system frequency when a unit fault occurs and the micro-grid islands. Then, the operation variations of the micro-grid are analyzed when it runs with load changes in islanding mode and runs with the load power of micro-source varied suddenly. The corresponding rules of the active power, voltage and current for each micro-source and the frequency for the micro-grid are obtained. The simulation data results show the correctness and validity of the droop control strategy.
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