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Frequency control is significant to maintain the stability and reliability of islanded microgrids. Generation side controls, e.g., virtual synchronous generator control and droop control, have been widely adopted to stabilize the frequency of islanded microgrid. However, this is not ideal method due to the capacity limitation and power fluctuation of distributed generation(DG). Meanwhile, energy storage...
In islanding microgrid, the distributed generation (DG) units should take over the microgrid and meet the power demand of loads. Due to the randomness and capacity limitation of DG units, the islanding microgrid may face overload challenge with load increasing. The islanding microgrid need massive energy storage system for power reserve or load shedding to maintain microgrid stable. However, this...
Droop control is an effective power sharing control scheme for islanding microgrid. With the load increasing, the microgrid may face overload challenge. Dispatch system should schedule energy storage system to provide power reserve or load shedding for preventing islanding microgrid black out. This paper proposes a coordinate control scheme for distributed generation (DG) units and active loads to...
This paper proposes an improved power sharing control scheme to achieve the accurate power sharing control and offer an improved PCC voltage regulation capability in islanding microgrid. An enhanced virtual impedance design is assumed in the conventional droop control scheme to manage distributed generation (DG) units to export the accurate reactive power in proportion to their rating. A point of...
This paper presents the design and implementation of a embedded processor, xCore_AHB, featuring precise interrupt and exception, which is compatible with ARMv4 architecture. The precise exception mechanism of this design provides not only the quick entrance of the interrupt handle programs but also the interrupt handle programs with the right return address by an additional program counter in write...
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