DC microgrids are proposed for the application of more electric aircraft (MEA) to feed DC loads existing in modern aircraft by means of DC sources. For stable parallel operation of DC sources, the droop control algorithm is employed. This control method manages power sharing among sources. There are different kinds of loads in the MEA application. The most frequent type of DC loads found in MEA is Constant Power Load (CPL). CPLs introduce instability to the system due to their intrinsic negative impedance. In this paper, small-signal model of the converter with CPL is derived. Then, the stable operation region of a DC microgrid according to different amounts of loads is studied. The behavior of CPLs in the utilization of the secondary controller is investigated and the correlation between secondary controller, droop controller, and CPLs is studied. Simulation and Hardware-In-the-Loop (HIL) results are used to validate the mathematical calculation.
Constant Power Load Analysis in Droop Controlled Microgrids for More Electric Aircraft Application
01.06.2020
3220134 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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