Control of Transient Power During Unintentional Islanding of Microgrids
IEEE Transactions on Power Electronics
Institute of Electrical and Electronics Engineers (IEEE)
In inverter-based microgrids, the paralleled inverters need to work in grid-connected mode and stand-alone mode and to transfer seamlessly between the two modes. In grid-connected mode, the inverters control the amount of power injected into the grid. In stand-alone mode, however, the inverters control the island voltage while the output power is dictated by the load. This can be achieved using the droop control. Inverters can have different power set points during grid-connected mode, but in stand-alone mode, they all need their power set points to be adjusted according to their power ratings. However, during sudden unintentional islanding (due to loss of mains), transient power can flow from inverters with high power set points to inverters with low power set points, which can raise the dc-link voltage of the inverters causing them to shut down. This paper investigates the transient circulating power between paralleled inverters during unintentional islanding and proposes a controller to limit it. The controller monitors the dc-link voltage and adjusts the power set point in proportion to the rise in the voltage. A small-signal model of an islanded microgrid is developed and used to design the controller. Simulation and experimental results are presented to validate the design.
This is the author accepted manuscript. The final version is available from IEEE via the DOI in this record.
Vol. 30 (8), pp. 4573 - 4584
Showing items related by title, author, creator and subject.
Low power adaptive power management with energy aware interface for wireless sensor nodes powered using piezoelectric energy harvesting Chew, Zheng Jun; Zhu, Meiling (IEEE, 2015)A batteryless power management circuit incorporating an energy aware interface (EAI) for wireless sensor nodes (WSNs) powered by piezoelectric energy harvester (PEH) has been proposed and implemented. Traditional power ...
Combined power extraction with adaptive power management module for increased piezoelectric energy harvesting to power wireless sensor nodes Chew, ZJ; zhu, M (Institute of Electrical and Electronics Engineers (IEEE), 2016)This paper, for the first time, presents a combined power extraction with adaptive full analogue power management module (PMM) for increased piezoelectric energy harvesting. The PMM is adaptive to variations in the amplitude ...
Mechanical power output during cycling: The efficacy of mobile power meters for monitoring exercise intensity during cycling Nimmerichter, Alfred (University of ExeterCollege of Life and Environmental SciencesSport and Health Sciences, 2011-02-08)One of the most meaningful technical innovations in cycling over the past two decades was the development of mobile power meters. With the ability to measure the physical strain under “real world” outdoor conditions, the ...