This article looks into the voltage stability and network scalability of self-contained converter-based dc microgrids under an innovative control approach, namely a nonlinear adaptive droop-based controller with overcurrent protection, devised for hybrid electric aircraft applications. Apart from guaranteeing tight voltage regulation and accurate adaptive distribution of load power across parallel batteries proportional with their current state of charge, the controller features an inherent overcurrent protection. Notably, the applied nonlinear adaptive droop-based controller introduces a virtual voltage and a constant virtual resistance, placed in series with the inductance and parasitic resistance of each dirrect current dc/dc bidirectional boost converter. Moreover, the voltage stability for the $n$-dimensional system is subsequently investigated, providing valuable insights into the voltage dynamic behavior, followed by a network scalability study based on the system's passivity properties. Finally, numerical simulations replicating various in-flight scenarios align with and validate our theoretical developments in the pursuit of minimizing emissions, environmental impact, and operational costs.
On the Voltage Stability and Network Scalability of Onboard DC Microgrids for Hybrid Electric Aircraft
IEEE Transactions on Aerospace and Electronic Systems ; 60 , 4 ; 5350-5358
01.08.2024
2103029 byte
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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