Kernkonzepte
The paper proposes controllers for buses in a DC microgrid that guarantee voltage regulation and output strictly equilibrium-independent passivity (OS-EIP) of the controlled buses, even with uncertain, non-monotone loads. The asymptotic stability of the overall microgrid is ensured by interconnecting the OS-EIP clusters.
Zusammenfassung
The paper addresses the problem of voltage stability in DC networks containing uncertain loads with non-monotone incremental impedances, where the steady-state power availability is restricted to a subset of the buses.
Key highlights:
- Voltage setting controllers are designed for buses where steady-state power is available. These controllers guarantee voltage regulation and OS-EIP of the controlled buses.
- Voltage following controllers are designed for buses without steady-state power. These controllers dampen the transient behavior of the buses without passivating them.
- An LMI condition is provided to verify the OS-EIP of a cluster containing both voltage setting and voltage following buses.
- The asymptotic stability of the overall microgrid is ensured by interconnecting the OS-EIP clusters.
- Singular perturbation theory is used to derive a reduced-order LMI to verify the cluster OS-EIP, and the robustness of the cluster passivity against parameter or topology changes is investigated.
Statistiken
The paper does not contain any explicit numerical data or statistics. It focuses on the theoretical analysis and controller design for the DC microgrid.
Zitate
"We propose controllers for powered buses that guarantee voltage regulation and output strictly equilibrium independent passivity (OS-EIP) of the controlled buses, while buses without power are equipped with controllers that dampen their transient behaviour."
"The OS-EIP of a cluster containing both bus types is verified through a linear matrix inequality (LMI) condition, and the asymptotic stability of the overall microgrid with uncertain, non-monotone loads is ensured by interconnecting the OS-EIP clusters."